* [PATCH] Add if-chain to switch conversion pass.
@ 2019-11-04 14:23 Martin Liška
2019-11-04 14:49 ` Jakub Jelinek
0 siblings, 1 reply; 49+ messages in thread
From: Martin Liška @ 2019-11-04 14:23 UTC (permalink / raw)
To: gcc-patches; +Cc: kazu, Jan Hubicka
[-- Attachment #1: Type: text/plain, Size: 4375 bytes --]
Hello.
The patch adds a new pass that identifies a series of if-elseif
statements and transform then into a GIMPLE switch (if possible).
The pass runs right after tree-ssa pass and I decided to implement
matching of various forms that are introduced by folder (fold_range_test):
1) if condition with equal operation:
<bb 2> :
if (argc_8(D) == 1)
goto <bb 3>; [INV]
else
goto <bb 4>; [INV]
2) if condition with a range check:
<bb 3> :
_4 = c_13(D) + 198;
if (_4 <= 1)
goto <bb 7>; [INV]
else
goto <bb 4>; [INV]
3) mixture of 1) and 2) with a or condition:
<bb 2> :
_1 = aChar_8(D) == 1;
_2 = aChar_8(D) == 10;
_3 = _1 | _2;
if (_3 != 0)
goto <bb 5>; [INV]
else
goto <bb 3>; [INV]
or:
<bb 2> :
aChar.1_1 = (unsigned int) aChar_10(D);
_2 = aChar.1_1 + 4294967287;
_3 = _2 <= 1;
_4 = aChar_10(D) == 12;
_5 = _3 | _4;
if (_5 != 0)
goto <bb 5>; [INV]
else
goto <bb 3>; [INV]
The motivation example in PR88702 is transformed now into:
IsHTMLWhitespace (int aChar)
{
int iftmp.0_1;
<bb 2> [local count: 1073741824]:
switch (aChar_2(D)) <default: <L6> [50.00%], case 9 ... 10: <L7> [50.00%], case 12 ... 13: <L7> [50.00%], case 32: <L7> [50.00%]>
<bb 3> [local count: 536870913]:
<L6>:
<bb 4> [local count: 1073741824]:
# iftmp.0_1 = PHI <1(2), 0(3)>
<L7>:
return iftmp.0_1;
}
I'm also attaching if-elseif chains that are transformed in make all-host of the GCC compiler.
There are ~800 such transformations. The most beautiful transformation is this one:
$ cat -n gcc/c-family/c-common.c
...
2895 /* This used to be a switch, but Genix compiler can't handle that. */
2896 if (code == NE_EXPR)
2897 {
2898 if (max_lt || min_gt)
2899 val = truthvalue_true_node;
2900 }
2901 else if (code == EQ_EXPR)
2902 {
2903 if (max_lt || min_gt)
2904 val = truthvalue_false_node;
2905 }
...
Patch can bootstrap on x86_64-linux-gnu and survives regression tests.
Thoughts?
Thanks,
Martin
gcc/ChangeLog:
2019-11-04 Martin Liska <mliska@suse.cz>
PR tree-optimization/14799
PR ipa/88702
* Makefile.in: Include new tree-if-to-switch.o.
* common.opt: Document -ftree-if-to-switch.
* doc/invoke.texi: Likewise.
* opts.c: Enable the pass with -O2+.
* passes.def: Add ne pass.
* timevar.def (TV_TREE_IF_TO_SWITCH): Add new
timevar.
* tree-if-to-switch.c: New file.
* tree-pass.h (make_pass_if_to_switch): New.
gcc/testsuite/ChangeLog:
2019-11-04 Martin Liska <mliska@suse.cz>
PR tree-optimization/14799
PR ipa/88702
* gcc.dg/tree-ssa/if-to-switch-1.c: New test.
* gcc.dg/tree-ssa/if-to-switch-2.c: New test.
* gcc.dg/tree-ssa/if-to-switch-3.c: New test.
* gcc.dg/tree-ssa/if-to-switch-4.c: New test.
* gcc.dg/tree-ssa/if-to-switch-5.c: New test.
* gcc.dg/tree-ssa/reassoc-32.c: Disable tree-if-to-switch
in order to transform the range test.
* gcc.dg/tree-ssa/reassoc-33.c: Likewise.
---
gcc/Makefile.in | 1 +
gcc/common.opt | 4 +
gcc/doc/invoke.texi | 10 +-
gcc/opts.c | 1 +
gcc/passes.def | 1 +
.../gcc.dg/tree-ssa/if-to-switch-1.c | 35 +
.../gcc.dg/tree-ssa/if-to-switch-2.c | 11 +
.../gcc.dg/tree-ssa/if-to-switch-3.c | 11 +
.../gcc.dg/tree-ssa/if-to-switch-4.c | 35 +
.../gcc.dg/tree-ssa/if-to-switch-5.c | 12 +
gcc/testsuite/gcc.dg/tree-ssa/reassoc-32.c | 2 +-
gcc/testsuite/gcc.dg/tree-ssa/reassoc-33.c | 2 +-
gcc/timevar.def | 1 +
gcc/tree-if-to-switch.c | 611 ++++++++++++++++++
gcc/tree-pass.h | 1 +
15 files changed, 735 insertions(+), 3 deletions(-)
create mode 100644 gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-1.c
create mode 100644 gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-2.c
create mode 100644 gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-3.c
create mode 100644 gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-4.c
create mode 100644 gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-5.c
create mode 100644 gcc/tree-if-to-switch.c
[-- Attachment #2: 0001-Add-if-chain-to-switch-conversion-pass.patch --]
[-- Type: text/x-patch, Size: 26913 bytes --]
diff --git a/gcc/Makefile.in b/gcc/Makefile.in
index 035b58f50c0..0d92347ad9b 100644
--- a/gcc/Makefile.in
+++ b/gcc/Makefile.in
@@ -1525,6 +1525,7 @@ OBJS = \
tree-eh.o \
tree-emutls.o \
tree-if-conv.o \
+ tree-if-to-switch.o \
tree-inline.o \
tree-into-ssa.o \
tree-iterator.o \
diff --git a/gcc/common.opt b/gcc/common.opt
index cc279f411d7..671b2a99391 100644
--- a/gcc/common.opt
+++ b/gcc/common.opt
@@ -2649,6 +2649,10 @@ ftree-switch-conversion
Common Report Var(flag_tree_switch_conversion) Optimization
Perform conversions of switch initializations.
+ftree-if-to-switch
+Common Report Var(flag_tree_if_to_switch) Optimization
+Perform conversions of if-elseif chain into a switch statement.
+
ftree-dce
Common Report Var(flag_tree_dce) Optimization
Enable SSA dead code elimination optimization on trees.
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi
index faa7fa95a0e..125b34e7f43 100644
--- a/gcc/doc/invoke.texi
+++ b/gcc/doc/invoke.texi
@@ -478,7 +478,7 @@ Objective-C and Objective-C++ Dialects}.
-fthread-jumps -ftracer -ftree-bit-ccp @gol
-ftree-builtin-call-dce -ftree-ccp -ftree-ch @gol
-ftree-coalesce-vars -ftree-copy-prop -ftree-dce -ftree-dominator-opts @gol
--ftree-dse -ftree-forwprop -ftree-fre -fcode-hoisting @gol
+-ftree-dse -ftree-forwprop -ftree-fre -ftree-if-to-switch -fcode-hoisting @gol
-ftree-loop-if-convert -ftree-loop-im @gol
-ftree-phiprop -ftree-loop-distribution -ftree-loop-distribute-patterns @gol
-ftree-loop-ivcanon -ftree-loop-linear -ftree-loop-optimize @gol
@@ -8443,6 +8443,7 @@ also turns on the following optimization flags:
-fstrict-aliasing @gol
-fthread-jumps @gol
-ftree-builtin-call-dce @gol
+-ftree-if-to-switch @gol
-ftree-pre @gol
-ftree-switch-conversion -ftree-tail-merge @gol
-ftree-vrp}
@@ -9628,6 +9629,13 @@ Perform conversion of simple initializations in a switch to
initializations from a scalar array. This flag is enabled by default
at @option{-O2} and higher.
+@item -ftree-if-to-switch
+@opindex ftree-if-to-switch
+Perform conversion of an if cascade into a switch statement.
+The transformation can help to produce a faster code for
+the switch statement. This flag is enabled by default
+at @option{-O2} and higher.
+
@item -ftree-tail-merge
@opindex ftree-tail-merge
Look for identical code sequences. When found, replace one with a jump to the
diff --git a/gcc/opts.c b/gcc/opts.c
index 10b9f108f8d..f781cfd5709 100644
--- a/gcc/opts.c
+++ b/gcc/opts.c
@@ -524,6 +524,7 @@ static const struct default_options default_options_table[] =
{ OPT_LEVELS_2_PLUS, OPT_fthread_jumps, NULL, 1 },
{ OPT_LEVELS_2_PLUS, OPT_ftree_pre, NULL, 1 },
{ OPT_LEVELS_2_PLUS, OPT_ftree_switch_conversion, NULL, 1 },
+ { OPT_LEVELS_2_PLUS, OPT_ftree_if_to_switch, NULL, 1 },
{ OPT_LEVELS_2_PLUS, OPT_ftree_tail_merge, NULL, 1 },
{ OPT_LEVELS_2_PLUS, OPT_ftree_vrp, NULL, 1 },
{ OPT_LEVELS_2_PLUS, OPT_fvect_cost_model_, NULL, VECT_COST_MODEL_CHEAP },
diff --git a/gcc/passes.def b/gcc/passes.def
index 798a391bd35..2bd2c348fb3 100644
--- a/gcc/passes.def
+++ b/gcc/passes.def
@@ -59,6 +59,7 @@ along with GCC; see the file COPYING3. If not see
NEXT_PASS (pass_early_warn_uninitialized);
NEXT_PASS (pass_ubsan);
NEXT_PASS (pass_nothrow);
+ NEXT_PASS (pass_if_to_switch);
NEXT_PASS (pass_rebuild_cgraph_edges);
POP_INSERT_PASSES ()
diff --git a/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-1.c b/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-1.c
new file mode 100644
index 00000000000..bcb8ef2a160
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-1.c
@@ -0,0 +1,35 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -fdump-tree-iftoswitch" } */
+
+int global;
+int foo ();
+
+int main(int argc, char **argv)
+{
+ if (argc == 1)
+ foo ();
+ else if (argc == 2)
+ {
+ global += 1;
+ }
+ else if (argc == 3)
+ {
+ foo ();
+ foo ();
+ }
+ else if (argc == 4)
+ {
+ foo ();
+ }
+ else if (argc == 5)
+ {
+ global = 2;
+ }
+ else
+ global -= 123;
+
+ global -= 12;
+ return 0;
+}
+
+/* { dg-final { scan-tree-dump "Condition chain \\(at .*if-to-switch-1.c:9\\) with 5 conditions \\(5 BBs\\) transformed into a switch statement." "iftoswitch" } } */
diff --git a/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-2.c b/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-2.c
new file mode 100644
index 00000000000..316e772ec29
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-2.c
@@ -0,0 +1,11 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -fdump-tree-iftoswitch" } */
+
+int IsHTMLWhitespaceNoRange(int aChar)
+{
+ return aChar == 0x0001 || aChar == 0x000A ||
+ aChar == 0x000C || aChar == 0x000E ||
+ aChar == 0x0020;
+}
+
+/* { dg-final { scan-tree-dump "Condition chain \\(at .*if-to-switch-2.c:7\\) with 5 conditions \\(3 BBs\\) transformed into a switch statement." "iftoswitch" } } */
diff --git a/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-3.c b/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-3.c
new file mode 100644
index 00000000000..fd07d909a3c
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-3.c
@@ -0,0 +1,11 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -fdump-tree-iftoswitch" } */
+
+int IsHTMLWhitespace(int aChar)
+{
+ return aChar == 0x0009 || aChar == 0x000A ||
+ aChar == 0x000C || aChar == 0x000D ||
+ aChar == 0x0020 || aChar == 0x0030;
+}
+
+/* { dg-final { scan-tree-dump "Condition chain \\(at .*if-to-switch-3.c:8\\) with 5 conditions \\(3 BBs\\) transformed into a switch statement." "iftoswitch" } } */
diff --git a/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-4.c b/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-4.c
new file mode 100644
index 00000000000..4e047505a2b
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-4.c
@@ -0,0 +1,35 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -fdump-tree-iftoswitch" } */
+
+int global;
+int foo ();
+
+int main(int argc, char **argv)
+{
+ if (argc == 1)
+ foo ();
+ else if (argc == 2)
+ {
+ global += 1;
+ }
+ else if (argc == 3)
+ {
+ foo ();
+ foo ();
+ }
+ else if (argc == 4)
+ {
+ foo ();
+ }
+ else if (argc == 1)
+ {
+ global = 2;
+ }
+ else
+ global -= 123;
+
+ global -= 12;
+ return 0;
+}
+
+/* { dg-final { scan-tree-dump-not "Condition chain " "iftoswitch" } } */
diff --git a/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-5.c b/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-5.c
new file mode 100644
index 00000000000..acb8b4b1211
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-5.c
@@ -0,0 +1,12 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -fdump-tree-iftoswitch" } */
+
+int crud (unsigned char c)
+{
+ return (((((((((((int) c == 46) || (int) c == 44)
+ || (int) c == 58) || (int) c == 59) || (int) c == 60)
+ || (int) c == 62) || (int) c == 34) || (int) c == 92)
+ || (int) c == 39) != 0);
+}
+
+/* { dg-final { scan-tree-dump "Condition chain \\(at .*if-to-switch-5.c:9\\) with 8 conditions \\(5 BBs\\) transformed into a switch statement." "iftoswitch" } } */
diff --git a/gcc/testsuite/gcc.dg/tree-ssa/reassoc-32.c b/gcc/testsuite/gcc.dg/tree-ssa/reassoc-32.c
index 944362ad076..0d4411fecf7 100644
--- a/gcc/testsuite/gcc.dg/tree-ssa/reassoc-32.c
+++ b/gcc/testsuite/gcc.dg/tree-ssa/reassoc-32.c
@@ -1,6 +1,6 @@
/* { dg-do run { target { ! "m68k*-*-* mmix*-*-* bfin*-*-* v850*-*-* moxie*-*-* cris*-*-* m32c*-*-* fr30*-*-* mcore*-*-* powerpc*-*-* xtensa*-*-*"} } } */
-/* { dg-options "-O2 -fno-inline -fdump-tree-reassoc1-details --param logical-op-non-short-circuit=1" } */
+/* { dg-options "-O2 -fno-inline -fdump-tree-reassoc1-details --param logical-op-non-short-circuit=1 -fno-tree-if-to-switch" } */
/* { dg-additional-options "-mbranch-cost=2" { target branch_cost } } */
diff --git a/gcc/testsuite/gcc.dg/tree-ssa/reassoc-33.c b/gcc/testsuite/gcc.dg/tree-ssa/reassoc-33.c
index db0ce4c8463..d52860fa2f4 100644
--- a/gcc/testsuite/gcc.dg/tree-ssa/reassoc-33.c
+++ b/gcc/testsuite/gcc.dg/tree-ssa/reassoc-33.c
@@ -1,6 +1,6 @@
/* { dg-do run { target { ! "m68k*-*-* mmix*-*-* bfin*-*-* v850*-*-* moxie*-*-* cris*-*-* m32c*-*-* fr30*-*-* mcore*-*-* powerpc*-*-* xtensa*-*-* hppa*-*-* nios2*-*-* or1k-*-*-* pru*-*-*"} } } */
-/* { dg-options "-O2 -fno-inline -fdump-tree-reassoc1-details --param logical-op-non-short-circuit=1" } */
+/* { dg-options "-O2 -fno-inline -fdump-tree-reassoc1-details --param logical-op-non-short-circuit=1 -fno-tree-if-to-switch" } */
/* { dg-additional-options "-mbranch-cost=2" { target branch_cost } } */
int test (int a, int b, int c)
diff --git a/gcc/timevar.def b/gcc/timevar.def
index 357fcfd65c5..20ea20a6178 100644
--- a/gcc/timevar.def
+++ b/gcc/timevar.def
@@ -290,6 +290,7 @@ DEFTIMEVAR (TV_VAR_TRACKING , "variable tracking")
DEFTIMEVAR (TV_VAR_TRACKING_DATAFLOW , "var-tracking dataflow")
DEFTIMEVAR (TV_VAR_TRACKING_EMIT , "var-tracking emit")
DEFTIMEVAR (TV_TREE_IFCOMBINE , "tree if-combine")
+DEFTIMEVAR (TV_TREE_IF_TO_SWITCH , "if to switch conversion")
DEFTIMEVAR (TV_TREE_UNINIT , "uninit var analysis")
DEFTIMEVAR (TV_PLUGIN_INIT , "plugin initialization")
DEFTIMEVAR (TV_PLUGIN_RUN , "plugin execution")
diff --git a/gcc/tree-if-to-switch.c b/gcc/tree-if-to-switch.c
new file mode 100644
index 00000000000..43984b6b7e4
--- /dev/null
+++ b/gcc/tree-if-to-switch.c
@@ -0,0 +1,611 @@
+/* If-elseif-else to switch conversion pass
+ Copyright (C) 2019 Free Software Foundation, Inc.
+
+This file is part of GCC.
+
+GCC is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 3, or (at your option)
+any later version.
+
+GCC is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GCC; see the file COPYING3. If not see
+<http://www.gnu.org/licenses/>. */
+
+#include "config.h"
+#include "system.h"
+#include "coretypes.h"
+#include "backend.h"
+#include "rtl.h"
+#include "tree.h"
+#include "gimple.h"
+#include "tree-pass.h"
+#include "ssa.h"
+#include "gimple-pretty-print.h"
+#include "fold-const.h"
+#include "gimple-iterator.h"
+#include "tree-cfg.h"
+#include "tree-dfa.h"
+#include "domwalk.h"
+#include "tree-cfgcleanup.h"
+#include "params.h"
+#include "alias.h"
+#include "tree-ssa-loop.h"
+#include "diagnostic.h"
+#include "cfghooks.h"
+#include "tree-into-ssa.h"
+#include "cfganal.h"
+
+/* Tuple that holds minimum and maximum values in a case. */
+
+struct case_range
+{
+ /* Default constructor. */
+ case_range ():
+ m_min (NULL_TREE), m_max (NULL_TREE)
+ {}
+
+ /* Minimum case value. */
+ tree m_min;
+ /* Maximum case value. */
+ tree m_max;
+};
+
+/* One entry of a if chain. */
+
+struct if_chain_entry
+{
+ /* Constructor. */
+ if_chain_entry (basic_block bb, edge true_edge, edge false_edge)
+ : m_case_values (), m_bb (bb),
+ m_true_edge (true_edge), m_false_edge (false_edge)
+ {
+ m_case_values.create (2);
+ }
+
+ /* Vector of at maximum 2 case ranges. */
+ vec<case_range> m_case_values;
+ /* Basic block of the original condition. */
+ basic_block m_bb;
+ /* True edge of the gimple condition. */
+ edge m_true_edge;
+ /* False edge of the gimple condition. */
+ edge m_false_edge;
+};
+
+/* Master structure for one if to switch conversion candidate. */
+
+struct if_chain
+{
+ /* Default constructor. */
+ if_chain():
+ m_first_condition (NULL), m_index (NULL_TREE), m_entries ()
+ {
+ m_entries.create (2);
+ }
+
+ /* Set index and check that it is not a different one. */
+ bool set_and_check_index (tree index);
+
+ /* Verify that all case ranges do not overlap. */
+ bool check_non_overlapping_cases ();
+
+ /* First condition of the chain. */
+ gcond *m_first_condition;
+ /* Switch index. */
+ tree m_index;
+ /* If chain entries. */
+ vec<if_chain_entry> m_entries;
+};
+
+bool
+if_chain::set_and_check_index (tree index)
+{
+ if (TREE_CODE (index) != SSA_NAME || !INTEGRAL_TYPE_P (TREE_TYPE (index)))
+ return false;
+
+ if (m_index == NULL)
+ m_index = index;
+
+ return index == m_index;
+}
+
+/* Compare two case ranges by minimum value. */
+
+static int
+range_cmp (const void *a, const void *b)
+{
+ const case_range *cr1 = *(const case_range * const *) a;
+ const case_range *cr2 = *(const case_range * const *) b;
+
+ return tree_int_cst_compare (cr1->m_min, cr2->m_min);
+}
+
+bool
+if_chain::check_non_overlapping_cases ()
+{
+ auto_vec<case_range *> all_ranges;
+ for (unsigned i = 0; i < m_entries.length (); i++)
+ for (unsigned j =0; j < m_entries[i].m_case_values.length (); j++)
+ all_ranges.safe_push (&m_entries[i].m_case_values[j]);
+
+ all_ranges.qsort (range_cmp);
+
+ for (unsigned i = 0; i < all_ranges.length () - 1; i++)
+ {
+ case_range *left = all_ranges[i];
+ case_range *right = all_ranges[i + 1];
+ if (tree_int_cst_le (left->m_min, right->m_min)
+ && tree_int_cst_le (right->m_min, left->m_max))
+ return false;
+ }
+
+ return true;
+}
+
+/* DOM walker for if to switch conversion. */
+
+class if_dom_walker : public dom_walker
+{
+public:
+ if_dom_walker (cdi_direction direction)
+ : dom_walker (direction), all_candidates (), m_visited_bbs ()
+ {}
+
+ virtual edge before_dom_children (basic_block);
+
+ /* List of all found candidates. */
+ auto_vec<if_chain> all_candidates;
+
+private:
+ /* Bitmap of all visited basic blocks. */
+ auto_bitmap m_visited_bbs;
+};
+
+/* Build case label with MIN and MAX values of a given basic block DEST. */
+
+static tree
+build_case_label (tree min, tree max, basic_block dest)
+{
+ tree label = gimple_block_label (dest);
+ return build_case_label (min, min == max ? NULL_TREE : max, label);
+}
+
+/* Compare two integer constants. */
+
+static int
+label_cmp (const void *a, const void *b)
+{
+ const_tree l1 = *(const const_tree *) a;
+ const_tree l2 = *(const const_tree *) b;
+
+ return tree_int_cst_compare (CASE_LOW (l1), CASE_LOW (l2));
+}
+
+/* Record all original phi arguments into PHI_MAX. Do it for
+ a given edge E. */
+
+static void
+record_phi_arguments (hash_map<basic_block, vec<tree> > *phi_map, edge e)
+{
+ if (phi_map->get (e->dest) == NULL)
+ {
+ vec<tree> phi_arguments;
+ phi_arguments.create (4);
+ for (gphi_iterator gsi = gsi_start_phis (e->dest); !gsi_end_p (gsi);
+ gsi_next (&gsi))
+ {
+ gphi *phi = gsi.phi ();
+ if (!virtual_operand_p (gimple_phi_result (phi)))
+ phi_arguments.safe_push (PHI_ARG_DEF_FROM_EDGE (phi, e));
+ }
+
+ phi_map->put (e->dest, phi_arguments);
+ }
+}
+
+/* Convert a given if CHAIN into a switch GIMPLE statement. */
+
+static void
+convert_if_conditions_to_switch (if_chain &chain)
+{
+ auto_vec<tree> labels;
+ if_chain_entry first_cond = chain.m_entries[0];
+
+ unsigned entries = chain.m_entries.length ();
+ edge default_edge = chain.m_entries[entries - 1].m_false_edge;
+ basic_block default_bb = default_edge->dest;
+
+ /* Recond all PHI nodes that will later be fixed. */
+ hash_map<basic_block, vec<tree> > phi_map;
+ for (unsigned i = 0; i < chain.m_entries.length (); i++)
+ record_phi_arguments (&phi_map, chain.m_entries[i].m_true_edge);
+ record_phi_arguments (&phi_map, chain.m_entries[entries - 1].m_false_edge);
+
+ for (unsigned i = 0; i < chain.m_entries.length (); i++)
+ {
+ if_chain_entry entry = chain.m_entries[i];
+
+ basic_block case_bb = entry.m_true_edge->dest;
+
+ for (unsigned j = 0; j < entry.m_case_values.length (); j++)
+ labels.safe_push (build_case_label (entry.m_case_values[j].m_min,
+ entry.m_case_values[j].m_max,
+ case_bb));
+ default_bb = entry.m_false_edge->dest;
+
+ if (i == 0)
+ {
+ remove_edge (first_cond.m_true_edge);
+ remove_edge (first_cond.m_false_edge);
+ }
+ else
+ delete_basic_block (entry.m_bb);
+
+ make_edge (first_cond.m_bb, case_bb, 0);
+ }
+
+ labels.qsort (label_cmp);
+
+ edge e = find_edge (first_cond.m_bb, default_bb);
+ if (e == NULL)
+ e = make_edge (first_cond.m_bb, default_bb, 0);
+ gswitch *s
+ = gimple_build_switch (chain.m_index,
+ build_case_label (NULL_TREE, NULL_TREE, default_bb),
+ labels);
+
+ gimple_stmt_iterator gsi = gsi_for_stmt (chain.m_first_condition);
+ gsi_remove (&gsi, true);
+ gsi_insert_before (&gsi, s, GSI_NEW_STMT);
+
+ /* Fill up missing PHI node arguments. */
+ for (hash_map<basic_block, vec<tree> >::iterator it = phi_map.begin ();
+ it != phi_map.end (); ++it)
+ {
+ edge e = find_edge (first_cond.m_bb, (*it).first);
+ unsigned i = 0;
+ for (gphi_iterator gsi = gsi_start_phis ((*it).first); !gsi_end_p (gsi);
+ gsi_next (&gsi))
+ {
+ gphi *phi = gsi.phi ();
+ if (!virtual_operand_p (gimple_phi_result (phi)))
+ add_phi_arg (phi, (*it).second[i++], e, UNKNOWN_LOCATION);
+ }
+ }
+}
+
+static bool
+extract_case_from_stmt (tree rhs1, tree rhs2, tree_code code, tree *index,
+ case_range *range, unsigned *visited_stmt_count)
+{
+ if (code == EQ_EXPR)
+ {
+ /* Handle situation 2a:
+ _1 = aChar_8(D) == 1; */
+ *index = rhs1;
+ range->m_min = rhs2;
+ range->m_max = range->m_min;
+
+ if (TREE_CODE (rhs2) != INTEGER_CST)
+ return false;
+
+ *visited_stmt_count += 1;
+ return true;
+ }
+ else if (code == LE_EXPR)
+ {
+ /* Handle situation 2b:
+ aChar.1_1 = (unsigned int) aChar_10(D);
+ _2 = aChar.1_1 + 4294967287;
+ _3 = _2 <= 1; */
+ tree ssa = rhs1;
+ tree range_size = rhs2;
+ if (TREE_CODE (ssa) != SSA_NAME
+ || TREE_CODE (range_size) != INTEGER_CST)
+ return false;
+
+ gassign *subtraction = dyn_cast<gassign *> (SSA_NAME_DEF_STMT (ssa));
+ if (subtraction == NULL
+ || gimple_assign_rhs_code (subtraction) != PLUS_EXPR)
+ return false;
+
+ tree casted = gimple_assign_rhs1 (subtraction);
+ tree min = gimple_assign_rhs2 (subtraction);
+ if (TREE_CODE (casted) != SSA_NAME
+ || TREE_CODE (min) != INTEGER_CST)
+ return false;
+
+ if (!SSA_NAME_IS_DEFAULT_DEF (casted))
+ {
+ gassign *to_unsigned
+ = dyn_cast<gassign *> (SSA_NAME_DEF_STMT (casted));
+ if (to_unsigned == NULL
+ || !gimple_assign_unary_nop_p (to_unsigned)
+ || !TYPE_UNSIGNED (TREE_TYPE (casted)))
+ return false;
+ *index = gimple_assign_rhs1 (to_unsigned);
+ ++(*visited_stmt_count);
+ }
+ else
+ *index = casted;
+
+ tree type = TREE_TYPE (*index);
+ tree range_min = fold_convert (type, const_unop (NEGATE_EXPR, type, min));
+
+ range->m_min = range_min;
+ range->m_max = const_binop (PLUS_EXPR, TREE_TYPE (*index),
+ range_min, fold_convert (type, range_size));
+ *visited_stmt_count += 2;
+ return true;
+ }
+ else
+ return false;
+}
+
+edge
+if_dom_walker::before_dom_children (basic_block bb)
+{
+ if_chain chain;
+ unsigned total_case_values = 0;
+
+ while (true)
+ {
+ bool first = chain.m_entries.is_empty ();
+ if (bitmap_bit_p (m_visited_bbs, bb->index))
+ break;
+ bitmap_set_bit (m_visited_bbs, bb->index);
+
+ gimple_stmt_iterator gsi = gsi_last_nondebug_bb (bb);
+ if (gsi_end_p (gsi))
+ break;
+
+ if (!chain.m_entries.is_empty () && EDGE_COUNT (bb->preds) != 1)
+ break;
+
+ gcond *cond = dyn_cast<gcond *> (gsi_stmt (gsi));
+ if (cond == NULL)
+ break;
+
+ if (first)
+ chain.m_first_condition = cond;
+
+ edge true_edge, false_edge;
+ extract_true_false_edges_from_block (bb, &true_edge, &false_edge);
+
+ if_chain_entry entry (bb, true_edge, false_edge);
+
+ /* Current we support following patterns (situations):
+
+ 1) if condition with equal operation:
+
+ <bb 2> :
+ if (argc_8(D) == 1)
+ goto <bb 3>; [INV]
+ else
+ goto <bb 4>; [INV]
+
+ 2) if condition with a range check:
+
+ <bb 3> :
+ _4 = c_13(D) + 198;
+ if (_4 <= 1)
+ goto <bb 7>; [INV]
+ else
+ goto <bb 4>; [INV]
+
+ 3) mixture of 1) and 2) with a or condition:
+
+ <bb 2> :
+ _1 = aChar_8(D) == 1;
+ _2 = aChar_8(D) == 10;
+ _3 = _1 | _2;
+ if (_3 != 0)
+ goto <bb 5>; [INV]
+ else
+ goto <bb 3>; [INV]
+
+ or:
+
+ <bb 2> :
+ aChar.1_1 = (unsigned int) aChar_10(D);
+ _2 = aChar.1_1 + 4294967287;
+ _3 = _2 <= 1;
+ _4 = aChar_10(D) == 12;
+ _5 = _3 | _4;
+ if (_5 != 0)
+ goto <bb 5>; [INV]
+ else
+ goto <bb 3>; [INV]
+ */
+
+ tree lhs = gimple_cond_lhs (cond);
+ tree rhs = gimple_cond_rhs (cond);
+ tree_code code = gimple_cond_code (cond);
+ unsigned visited_stmt_count = 0;
+ unsigned case_values = 0;
+ tree index;
+
+ /* Situation 1. */
+ if (code == EQ_EXPR)
+ {
+ case_range range;
+ if (!extract_case_from_stmt (lhs, rhs, code, &index, &range,
+ &visited_stmt_count))
+ break;
+ if (!chain.set_and_check_index (index))
+ break;
+ entry.m_case_values.safe_push (range);
+ case_values = 1;
+ }
+ /* Situation 2. */
+ else if (code == LE_EXPR)
+ {
+ case_range range;
+ if (!extract_case_from_stmt (lhs, rhs, code, &index, &range,
+ &visited_stmt_count))
+ break;
+ if (!chain.set_and_check_index (index))
+ break;
+ entry.m_case_values.safe_push (range);
+ case_values = 1;
+ }
+ /* Situation 3. */
+ else if (code == NE_EXPR
+ && integer_zerop (rhs)
+ && TREE_CODE (lhs) == SSA_NAME
+ && TREE_CODE (TREE_TYPE (lhs)) == BOOLEAN_TYPE)
+ {
+ gassign *def = dyn_cast<gassign *> (SSA_NAME_DEF_STMT (lhs));
+ if (def == NULL
+ || gimple_assign_rhs_code (def) != BIT_IOR_EXPR
+ || gimple_bb (def) != bb)
+ break;
+
+ tree rhs1 = gimple_assign_rhs1 (def);
+ tree rhs2 = gimple_assign_rhs2 (def);
+ if (TREE_CODE (rhs1) != SSA_NAME || TREE_CODE (rhs2) != SSA_NAME)
+ break;
+
+ gassign *def1 = dyn_cast<gassign *> (SSA_NAME_DEF_STMT (rhs1));
+ gassign *def2 = dyn_cast<gassign *> (SSA_NAME_DEF_STMT (rhs2));
+ if (def1 == NULL
+ || def2 == NULL
+ || def1 == def2
+ || gimple_bb (def1) != bb
+ || gimple_bb (def2) != bb)
+ break;
+
+ case_range range1;
+ if (!extract_case_from_stmt (gimple_assign_rhs1 (def1),
+ gimple_assign_rhs2 (def1),
+ gimple_assign_rhs_code (def1),
+ &index, &range1,
+ &visited_stmt_count))
+ break;
+ rhs = gimple_assign_rhs2 (def1);
+ if (!chain.set_and_check_index (index))
+ break;
+ entry.m_case_values.safe_push (range1);
+
+ case_range range2;
+ if (!extract_case_from_stmt (gimple_assign_rhs1 (def2),
+ gimple_assign_rhs2 (def2),
+ gimple_assign_rhs_code (def2),
+ &index, &range2,
+ &visited_stmt_count))
+ break;
+ rhs = gimple_assign_rhs2 (def2);
+ if (!chain.set_and_check_index (index))
+ break;
+ entry.m_case_values.safe_push (range2);
+ case_values = 2;
+ visited_stmt_count += 2;
+ }
+ else
+ break;
+
+ /* If it's not the first condition, then we need a BB without
+ any statements. */
+ if (!first)
+ {
+ unsigned stmt_count = 0;
+ for (gimple_stmt_iterator gsi = gsi_start_nondebug_bb (bb);
+ !gsi_end_p (gsi); gsi_next_nondebug (&gsi))
+ ++stmt_count;
+
+ if (stmt_count - visited_stmt_count != 0)
+ break;
+ }
+
+ total_case_values += case_values;
+ chain.m_entries.safe_push (entry);
+
+ /* Follow if-elseif-elseif chain. */
+ bb = false_edge->dest;
+ }
+
+ if (total_case_values >= 3
+ && chain.check_non_overlapping_cases ())
+ {
+ if (dump_file)
+ {
+ expanded_location loc
+ = expand_location (gimple_location (chain.m_first_condition));
+ fprintf (dump_file, "Condition chain (at %s:%d) with %d conditions "
+ "(%d BBs) transformed into a switch statement.\n",
+ loc.file, loc.line, total_case_values,
+ chain.m_entries.length ());
+ }
+
+ all_candidates.safe_push (chain);
+ }
+
+ return NULL;
+}
+
+namespace {
+
+const pass_data pass_data_if_to_switch =
+{
+ GIMPLE_PASS, /* type */
+ "iftoswitch", /* name */
+ OPTGROUP_NONE, /* optinfo_flags */
+ TV_TREE_IF_TO_SWITCH, /* tv_id */
+ ( PROP_cfg | PROP_ssa ), /* properties_required */
+ 0, /* properties_provided */
+ 0, /* properties_destroyed */
+ 0, /* todo_flags_start */
+ TODO_cleanup_cfg | TODO_update_ssa /* todo_flags_finish */
+};
+
+class pass_if_to_switch : public gimple_opt_pass
+{
+public:
+ pass_if_to_switch (gcc::context *ctxt)
+ : gimple_opt_pass (pass_data_if_to_switch, ctxt)
+ {}
+
+ /* opt_pass methods: */
+ virtual bool gate (function *) { return flag_tree_if_to_switch != 0; }
+ virtual unsigned int execute (function *);
+
+}; // class pass_if_to_switch
+
+unsigned int
+pass_if_to_switch::execute (function *fun)
+{
+ /* We might consider making this a property of each pass so that it
+ can be [re]computed on an as-needed basis. Particularly since
+ this pass could be seen as an extension of DCE which needs post
+ dominators. */
+ calculate_dominance_info (CDI_DOMINATORS);
+
+ /* Dead store elimination is fundamentally a walk of the post-dominator
+ tree and a backwards walk of statements within each block. */
+ if_dom_walker walker (CDI_DOMINATORS);
+ walker.walk (fun->cfg->x_entry_block_ptr);
+
+ for (unsigned i = 0; i < walker.all_candidates.length (); i++)
+ convert_if_conditions_to_switch (walker.all_candidates[i]);
+
+ /* For now, just wipe the dominator information. */
+ free_dominance_info (CDI_DOMINATORS);
+
+ mark_virtual_operands_for_renaming (cfun);
+
+ return 0;
+}
+
+} // anon namespace
+
+gimple_opt_pass *
+make_pass_if_to_switch (gcc::context *ctxt)
+{
+ return new pass_if_to_switch (ctxt);
+}
diff --git a/gcc/tree-pass.h b/gcc/tree-pass.h
index a987661530e..84c498cb26e 100644
--- a/gcc/tree-pass.h
+++ b/gcc/tree-pass.h
@@ -374,6 +374,7 @@ extern gimple_opt_pass *make_pass_empty_loop (gcc::context *ctxt);
extern gimple_opt_pass *make_pass_graphite (gcc::context *ctxt);
extern gimple_opt_pass *make_pass_graphite_transforms (gcc::context *ctxt);
extern gimple_opt_pass *make_pass_if_conversion (gcc::context *ctxt);
+extern gimple_opt_pass *make_pass_if_to_switch (gcc::context *ctxt);
extern gimple_opt_pass *make_pass_loop_distribution (gcc::context *ctxt);
extern gimple_opt_pass *make_pass_vectorize (gcc::context *ctxt);
extern gimple_opt_pass *make_pass_simduid_cleanup (gcc::context *ctxt);
[-- Attachment #3: if-to-switch-in-gcc.txt --]
[-- Type: text/plain, Size: 92959 bytes --]
Condition chain (at ../../gcc/asan.h:166) with 12 conditions (9 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/asan.h:166) with 12 conditions (9 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/calls.c:1530) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/c/c-decl.c:6085) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/c/c-decl.c:6436) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/c/c-parser.c:11688) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/c/c-parser.c:344) with 8 conditions (4 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/c/c-typeck.c:11725) with 5 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/c/c-typeck.c:11728) with 5 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/c/c-typeck.c:11794) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/c/c-typeck.c:11853) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/c/c-typeck.c:4627) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/c/c-typeck.c:6813) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/c/c-typeck.c:6817) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/c/c-typeck.c:7951) with 5 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/c-family/c-common.c:2235) with 4 conditions (4 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/c-family/c-common.c:2376) with 18 conditions (18 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/c-family/c-common.c:2896) with 6 conditions (6 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/c-family/c-common.c:3637) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/c-family/c-common.c:6104) with 10 conditions (10 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/c-family/c-common.c:6652) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/c-family/c-omp.c:1563) with 4 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/c-family/c-omp.c:1757) with 6 conditions (5 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/c-family/c-pragma.c:142) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/c-family/c-pretty-print.c:1759) with 5 conditions (4 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/c-family/c-pretty-print.c:1952) with 4 conditions (4 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/c-family/c-pretty-print.c:401) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/c-family/c-warn.c:1917) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/c-family/c-warn.c:1941) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/c-family/c-warn.c:510) with 5 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/cgraph.h:2617) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/cgraph.h:2617) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/cgraph.h:2617) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/cgraph.h:2617) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/cgraph.h:2617) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/cgraph.h:2617) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/cgraph.h:2617) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/cgraph.h:2617) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/combine.c:10660) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/combine.c:11866) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/combine.c:11882) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/combine.c:11886) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/combine.c:6780) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/combine.c:8726) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/combine.c:9391) with 5 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/constraints.md:233) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/constraints.md:234) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/constraints.md:234) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.c:12074) with 8 conditions (8 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.c:12095) with 4 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.c:12838) with 7 conditions (7 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.c:12965) with 6 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.c:1857) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.c:18715) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.c:18743) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.c:18750) with 8 conditions (4 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.c:18799) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.c:19368) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.c:19384) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.c:3325) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.c:3850) with 4 conditions (4 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386-expand.c:10779) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386-expand.c:11421) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386-expand.c:14125) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386-expand.c:1868) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386-expand.c:2713) with 7 conditions (4 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386-expand.c:3134) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386-expand.c:6855) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:1119) with 5 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:13676) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:13707) with 4 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:13747) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:14258) with 4 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:14260) with 4 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:14270) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:14272) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:14757) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:14761) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:14765) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:14781) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:14785) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:14789) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:14909) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:14913) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:14917) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:14933) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:14937) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:14941) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:15068) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:15068) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:15108) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:15108) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:15112) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:15112) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:15172) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:15172) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:15260) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:15296) with 6 conditions (5 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:15304) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:15304) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:15308) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:15308) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:15344) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:15344) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:15348) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:15348) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:15352) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:15352) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:15356) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:15356) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:15380) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:15380) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:15384) with 5 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:15384) with 5 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:15388) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:15388) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:15392) with 5 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:15392) with 5 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:15435) with 5 conditions (5 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:15435) with 5 conditions (5 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:15448) with 5 conditions (5 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:15448) with 5 conditions (5 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:15548) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:15548) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:15555) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:15555) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:15576) with 5 conditions (5 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:15588) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:15588) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:15595) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:15595) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:15608) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:15608) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:15612) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:15612) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:15615) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:15615) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:15616) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:15616) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:15619) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:15619) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:15623) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:15623) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:15636) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:15636) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:15640) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:15640) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:15643) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:15643) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:15647) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:15647) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:15648) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:15648) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:15655) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:15655) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:15700) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:15756) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:15772) with 4 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:15776) with 4 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:15787) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:15787) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:15791) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:15791) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:15795) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:15795) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:15796) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:15796) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:15796) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:15799) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:15799) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:15800) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:15800) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:15800) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:15804) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:15804) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:15808) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:15808) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:15820) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:15824) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:15849) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:15849) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:15852) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:15856) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:15889) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:15889) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:15893) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:15893) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:15969) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:15969) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:15995) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:15995) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16035) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16035) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16039) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16039) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16115) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16115) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16135) with 5 conditions (5 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16135) with 5 conditions (5 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16173) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16173) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16177) with 5 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16177) with 5 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16181) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16181) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16185) with 5 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16185) with 5 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16188) with 5 conditions (5 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16188) with 5 conditions (5 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16240) with 4 conditions (4 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16255) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16255) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16288) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16288) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16289) with 5 conditions (5 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16295) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16295) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16300) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16315) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16315) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16319) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16319) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16319) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16319) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16323) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16323) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16323) with 5 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16323) with 5 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16327) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16327) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16328) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16328) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16328) with 6 conditions (5 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16331) with 5 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16331) with 5 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16343) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16343) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16347) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16347) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16347) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16347) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16348) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16348) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16352) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16352) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16353) with 5 conditions (5 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16355) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16355) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16356) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16356) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16376) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16376) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16380) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16380) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16387) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16387) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16387) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16388) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16388) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16391) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16391) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16408) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16408) with 5 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16412) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16413) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16433) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16451) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16451) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16451) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16452) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16469) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16477) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16485) with 4 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16487) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16487) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16489) with 4 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16491) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16491) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16491) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16495) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16495) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16499) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16499) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16509) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16513) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16533) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16536) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16536) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16537) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16540) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16540) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16544) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16544) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16548) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16548) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16565) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16569) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16583) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16583) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16587) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16587) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16623) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16623) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16627) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16627) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16631) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16631) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16635) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16635) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16640) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16644) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16659) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16659) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16663) with 5 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16663) with 5 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16667) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16667) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16671) with 5 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16671) with 5 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16770) with 4 conditions (4 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16776) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16780) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16800) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16830) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16892) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16938) with 5 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:16942) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:17170) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:17174) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:17306) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:17310) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:17330) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:17357) with 5 conditions (5 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:17374) with 6 conditions (5 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:17418) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:17422) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:17437) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:17454) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:17481) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:17482) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:17498) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:17522) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:1897) with 4 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:19703) with 5 conditions (5 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:19727) with 5 conditions (5 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:19815) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:19839) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:19867) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:19883) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:19887) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:19891) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:19907) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:19911) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:19915) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:19919) with 4 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:19939) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:19939) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:19943) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:19943) with 4 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:19963) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:19963) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:19967) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:19967) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:19987) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:19991) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:19995) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:19999) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:20019) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:20023) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:2247) with 8 conditions (4 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:2251) with 6 conditions (4 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:2265) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:22662) with 11 conditions (6 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:22666) with 11 conditions (6 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:22670) with 9 conditions (5 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:22674) with 9 conditions (5 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:22678) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:22738) with 5 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:22794) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:22801) with 11 conditions (6 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:22805) with 11 conditions (6 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:22809) with 9 conditions (5 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:22813) with 9 conditions (5 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:22817) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:22826) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:22877) with 5 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:2291) with 6 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:22933) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:22965) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:2302) with 8 conditions (4 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:2303) with 7 conditions (6 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:2306) with 6 conditions (4 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:2346) with 6 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:2358) with 7 conditions (6 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:24826) with 5 conditions (5 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:24890) with 5 conditions (5 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:24946) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:24998) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:25010) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:25010) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:25014) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:25022) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:25026) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:25054) with 4 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:25058) with 4 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:25062) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:25074) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:25078) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:25078) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:25082) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:25086) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:25090) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:25102) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:25106) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:25118) with 4 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:25122) with 4 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:25134) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:25138) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:25142) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:25146) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:25166) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:25170) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:25198) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:25202) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:28547) with 11 conditions (6 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:28551) with 11 conditions (6 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:28555) with 9 conditions (5 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:28559) with 9 conditions (5 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:28563) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:28618) with 11 conditions (6 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:28622) with 11 conditions (6 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:28623) with 5 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:28626) with 9 conditions (5 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:28630) with 9 conditions (5 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:28634) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:28679) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:28694) with 5 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:28750) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:28803) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:28819) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:2884) with 4 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:28859) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:28863) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:28874) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:2888) with 9 conditions (7 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:28890) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:28930) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:28934) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:2933) with 6 conditions (5 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:2977) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:2997) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:3142) with 5 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:3161) with 5 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:3170) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:3174) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:3189) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:3193) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:3238) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:3257) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:3454) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:3458) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:3462) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:3466) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:3473) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:3477) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:3481) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:3485) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:471) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:493) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:493) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:499) with 4 conditions (4 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:499) with 5 conditions (4 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:499) with 5 conditions (4 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:499) with 5 conditions (4 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:542) with 13 conditions (7 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:547) with 5 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:561) with 29 conditions (29 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:561) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:561) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:675) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:675) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:827) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:831) with 7 conditions (4 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:853) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:885) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:885) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:910) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:910) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:912) with 6 conditions (4 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/i386.md:912) with 6 conditions (4 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/predicates.md:795) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/predicates.md:811) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/predicates.md:819) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/predicates.md:827) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/sse.md:17117) with 13 conditions (7 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/sync.md:2662) with 4 conditions (4 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/sync.md:2689) with 4 conditions (4 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/sync.md:2785) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/sync.md:2810) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/x86-tune-sched-bd.c:167) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/x86-tune-sched-bd.c:460) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/config/i386/x86-tune-sched-bd.c:593) with 4 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/cp/cvt.c:861) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/cp/cxx-pretty-print.c:641) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/cp/decl2.c:1204) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/cp/decl.c:10845) with 5 conditions (5 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/cp/decl.c:11691) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/cp/decl.c:14212) with 5 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/cp/decl.c:5668) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/cp/decl.c:8970) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/cp/mangle.c:2848) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/cp/mangle.c:3121) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/cp/method.c:1339) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/cp/method.c:1452) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/cp/method.c:1486) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/cp/method.c:1587) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/cp/parser.c:31586) with 12 conditions (7 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/cp/parser.c:42835) with 4 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/cp/pt.c:14927) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/cp/semantics.c:4323) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/cp/typeck.c:4471) with 5 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/cp/typeck.c:6430) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/cp/type-utils.h:44) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/cse.c:3634) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/cselib.c:1634) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/diagnostic-show-locus.c:1312) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/diagnostic-show-locus.c:700) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/dwarf2out.c:5410) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/dwarf2out.c:7125) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/expr.c:8509) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/expr.c:9890) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/final.c:3922) with 4 conditions (4 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/fold-const.c:1682) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/fold-const.c:1849) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/fold-const.c:1914) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/fold-const.c:8141) with 5 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/fold-const.c:8220) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/fold-const.c:8608) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/fold-const.c:9761) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/fortran/arith.c:1565) with 11 conditions (6 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/fortran/check.c:184) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/fortran/check.c:324) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/fortran/check.c:413) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/fortran/convert.c:103) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/fortran/convert.c:112) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/fortran/decl.c:4724) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/fortran/decl.c:5378) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/fortran/dependency.c:1686) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/fortran/dependency.c:1738) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/fortran/dependency.c:1761) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/fortran/dump-parse-tree.c:1205) with 4 conditions (4 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/fortran/frontend-passes.c:406) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/fortran/interface.c:1025) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/fortran/interface.c:1058) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/fortran/interface.c:1058) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/fortran/interface.c:2100) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/fortran/intrinsic.c:953) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/fortran/io.c:455) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/fortran/io.c:476) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/fortran/io.c:664) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/fortran/match.c:2184) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/fortran/match.c:2998) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/fortran/openmp.c:588) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/fortran/parse.c:1369) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/fortran/parse.c:4193) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/fortran/parse.c:4357) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/fortran/primary.c:1155) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/fortran/resolve.c:4155) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/fortran/resolve.c:7750) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/fortran/scanner.c:1038) with 5 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/fortran/scanner.c:1101) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/fortran/scanner.c:1537) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/fortran/scanner.c:1785) with 5 conditions (4 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/fortran/scanner.c:1823) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/fortran/scanner.c:1896) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/fortran/scanner.c:2360) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/fortran/scanner.c:844) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/fortran/scanner.c:950) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/fortran/scanner.c:979) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/fortran/symbol.c:1765) with 7 conditions (5 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/fortran/trans-array.c:5003) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/fortran/trans-intrinsic.c:4532) with 5 conditions (4 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/fortran/trans-types.c:821) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/function.c:382) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/gcc.c:5592) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/gcc.c:5613) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/genautomata.c:951) with 8 conditions (8 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/genflags.c:61) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/gengtype.c:288) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/gengtype.c:288) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/gengtype.h:344) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/gengtype.h:344) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/gengtype.h:344) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/gengtype.h:344) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/gengtype-state.c:378) with 4 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/gengtype-state.c:378) with 4 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/gengtype-state.c:422) with 5 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/gengtype-state.c:422) with 5 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/genoutput.c:763) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/gensupport.c:829) with 7 conditions (5 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/gensupport.c:932) with 5 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/gimple.c:1796) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/gimple.h:2822) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/gimple.h:2822) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/gimple.h:2822) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/gimple.h:2822) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/gimple.h:2822) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/gimple.h:2822) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/gimple.h:2822) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/gimple.h:2822) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/gimple.h:2822) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/gimple.h:2822) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/gimple.h:2822) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/gimple.h:2822) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/gimple.h:2822) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/gimple.h:2822) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/gimple.h:6546) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/gimple.h:6546) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/gimple.h:6546) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/gimple.h:6546) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/gimple.h:6546) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/gimple.h:6546) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/gimple.h:6546) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/gimple.h:6546) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/gimple.h:6546) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/gimple.h:6546) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/gimple.h:6546) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/gimple.h:6546) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/gimple.h:6546) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/gimple.h:6546) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/gimple.h:6546) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/gimple-loop-versioning.cc:1235) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/gimple-pretty-print.c:391) with 4 conditions (4 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/gimple-ssa-isolate-paths.c:238) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/gimple-ssa-isolate-paths.c:480) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/gimple-ssa-isolate-paths.c:511) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/gimple-ssa-split-paths.c:135) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/gimple-ssa-strength-reduction.c:2138) with 7 conditions (4 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/gimple-streamer-in.c:216) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/gimplify.c:14262) with 17 conditions (9 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/gimplify.c:14262) with 5 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/gimplify.c:14262) with 6 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/gimplify.c:868) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/hsa-gen.c:3106) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/ifcvt.c:1701) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/ipa-fnsummary.c:1087) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/ipa-icf-gimple.c:150) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/ipa-prop.c:316) with 4 conditions (4 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/ira-build.c:1840) with 8 conditions (6 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/ira.c:1938) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/ira-costs.c:1154) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/jump.c:709) with 5 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/jump.c:720) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/jump.c:730) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/jump.c:756) with 4 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/jump.c:899) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/jump.c:901) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/lra-constraints.c:4213) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/lra-eliminations.c:759) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/lto-cgraph.c:1505) with 4 conditions (4 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/lto-cgraph.c:1758) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/lto/lto-common.c:1173) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/lto/lto-common.c:1404) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/lto/lto-lang.c:1109) with 18 conditions (18 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/lto/lto-lang.c:978) with 4 conditions (4 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/lto-streamer-in.c:1459) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/lto-streamer-in.c:1495) with 5 conditions (5 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/lto-streamer-out.c:1075) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/mcf.c:151) with 4 conditions (4 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/multiple_target.c:275) with 4 conditions (4 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/omp-expand.c:8872) with 4 conditions (4 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/omp-low.c:4495) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/omp-low.c:8292) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/omp-low.c:8521) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/optabs.c:1098) with 7 conditions (4 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/optabs.c:1277) with 5 conditions (5 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/optabs.c:1339) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/optabs.c:1444) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/optabs.c:1890) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/optabs.c:2783) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/optabs.c:3098) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/optabs-query.h:89) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/optabs-query.h:89) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/opts.c:169) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/print-rtl.c:511) with 6 conditions (6 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/print-tree.c:491) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/read-md.c:272) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/read-md.c:272) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/read-md.c:467) with 6 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/read-md.c:467) with 6 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/read-md.c:472) with 7 conditions (4 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/read-md.c:472) with 7 conditions (4 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/read-md.c:605) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/read-md.c:605) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/read-md.c:638) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/read-md.c:638) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/read-rtl-function.c:1400) with 10 conditions (10 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/recog.c:1870) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/regcprop.c:554) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/regcprop.c:561) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/reginfo.c:368) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/regrename.c:1311) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/regrename.c:1318) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/reload1.c:1359) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/reload1.c:3020) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/reload1.c:5625) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/reload1.c:5647) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/reload.c:2864) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/reload.c:329) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/reload.c:4660) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/reload.c:5551) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/reload.c:5562) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/rtlanal.c:1726) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/rtlanal.c:3524) with 5 conditions (5 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/rtlanal.c:3540) with 5 conditions (5 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/rtlanal.c:6242) with 5 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/sched-deps.c:2962) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/sched-deps.c:4277) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/sel-sched.c:2457) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/simplify-rtx.c:5334) with 6 conditions (4 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/simplify-rtx.c:5412) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/simplify-rtx.c:5527) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/targhooks.c:417) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/toplev.c:2083) with 4 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/trans-mem.c:1420) with 6 conditions (5 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/trans-mem.c:376) with 10 conditions (5 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/trans-mem.c:422) with 10 conditions (5 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/tree.c:10018) with 4 conditions (4 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/tree.c:10032) with 4 conditions (4 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/tree.c:4479) with 8 conditions (4 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/tree.c:5078) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/tree.c:7430) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/tree.c:7432) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/tree.c:9950) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/tree.c:9981) with 4 conditions (4 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/tree.c:9995) with 4 conditions (4 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/tree-data-ref.c:714) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/tree.h:5104) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/tree.h:5104) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/tree.h:5104) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/tree.h:5104) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/tree.h:5104) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/tree.h:5104) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/tree.h:5104) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/tree-inline.c:5406) with 4 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/tree-inline.c:5422) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/tree-ssa-ccp.c:1791) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/tree-ssa-dom.c:1925) with 4 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/tree-ssa-dse.c:998) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/tree-ssa-forwprop.c:1211) with 4 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/tree-ssa-forwprop.c:1933) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/tree-ssa-forwprop.c:2376) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/tree-ssa-forwprop.c:2748) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/tree-ssa-forwprop.c:2750) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/tree-ssa-loop-manip.c:1025) with 4 conditions (4 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/tree-ssa-operands.c:870) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/tree-ssa-reassoc.c:1984) with 4 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/tree-ssa-reassoc.c:6303) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/tree-ssa-structalias.c:4984) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/tree-ssa-threadbackward.c:752) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/tree-ssa-threadbackward.c:85) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/tree-ssa-threadedge.c:446) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/tree-vect-generic.c:1961) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/tree-vect-patterns.c:4060) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/tree-vect-stmts.c:10437) with 4 conditions (4 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/tree-vect-stmts.c:11554) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/tree-vect-stmts.c:5330) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/tree-vect-stmts.c:5364) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/tree-vect-stmts.c:5383) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/tree-vect-stmts.c:5421) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/tree-vrp.c:2374) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/varasm.c:7093) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/varasm.c:7108) with 4 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/vr-values.c:1525) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/vr-values.c:1652) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/vr-values.c:1665) with 4 conditions (4 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/vr-values.c:1672) with 4 conditions (3 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/vr-values.c:2251) with 3 conditions (2 BBs) transformed into a switch statement.
Condition chain (at ../../gcc/vr-values.c:572) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at generic-match.c:11350) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at generic-match.c:13676) with 4 conditions (4 BBs) transformed into a switch statement.
Condition chain (at generic-match.c:13743) with 4 conditions (4 BBs) transformed into a switch statement.
Condition chain (at generic-match.c:2238) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at generic-match.c:3464) with 4 conditions (4 BBs) transformed into a switch statement.
Condition chain (at generic-match.c:3533) with 4 conditions (4 BBs) transformed into a switch statement.
Condition chain (at generic-match.c:4637) with 4 conditions (3 BBs) transformed into a switch statement.
Condition chain (at generic-match.c:6091) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at gimple-match.c:12730) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at gimple-match.c:15379) with 4 conditions (4 BBs) transformed into a switch statement.
Condition chain (at gimple-match.c:15440) with 4 conditions (4 BBs) transformed into a switch statement.
Condition chain (at gimple-match.c:2515) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at gimple-match.c:3886) with 4 conditions (4 BBs) transformed into a switch statement.
Condition chain (at gimple-match.c:3947) with 4 conditions (4 BBs) transformed into a switch statement.
Condition chain (at gimple-match.c:6163) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at gimple-match.c:8404) with 4 conditions (3 BBs) transformed into a switch statement.
Condition chain (at insn-dfatab.c:2697) with 3 conditions (3 BBs) transformed into a switch statement.
Condition chain (at insn-dfatab.c:2733) with 6 conditions (5 BBs) transformed into a switch statement.
Condition chain (at ./tm-preds.h:304) with 3 conditions (3 BBs) transformed into a switch statement.
^ permalink raw reply [flat|nested] 49+ messages in thread* Re: [PATCH] Add if-chain to switch conversion pass. 2019-11-04 14:23 [PATCH] Add if-chain to switch conversion pass Martin Liška @ 2019-11-04 14:49 ` Jakub Jelinek 2019-11-05 12:38 ` Richard Biener 2019-11-13 11:32 ` [PATCH] Add if-chain to switch conversion pass Martin Liška 0 siblings, 2 replies; 49+ messages in thread From: Jakub Jelinek @ 2019-11-04 14:49 UTC (permalink / raw) To: Martin Liška; +Cc: gcc-patches, kazu, Jan Hubicka On Mon, Nov 04, 2019 at 03:23:20PM +0100, Martin Liška wrote: > The patch adds a new pass that identifies a series of if-elseif > statements and transform then into a GIMPLE switch (if possible). > The pass runs right after tree-ssa pass and I decided to implement > matching of various forms that are introduced by folder (fold_range_test): Not a review, just a few questions: 1) what does it do if __builtin_expect* has been used, does it preserve the probabilities and if in the end decides to expand as ifs, are those probabilities retained through it? 2) for the reassoc-*.c testcases, do you get identical or better code with the patch? 3) shouldn't it be gimple-if-to-switch.c instead? 4) what code size effect does the patch have say on cc1plus (if you don't count the code changes of the patch itself, i.e. revert the patch in the stage3 and rebuild just the stage3)? > +struct case_range > +{ > + /* Default constructor. */ > + case_range (): > + m_min (NULL_TREE), m_max (NULL_TREE) I admit I'm never sure about coding conventions for C++, but shouldn't there be a space before :, or even better : be on the next line before m_min ? Jakub ^ permalink raw reply [flat|nested] 49+ messages in thread
* Re: [PATCH] Add if-chain to switch conversion pass. 2019-11-04 14:49 ` Jakub Jelinek @ 2019-11-05 12:38 ` Richard Biener 2019-11-06 21:03 ` Bernhard Reutner-Fischer 2019-11-14 9:41 ` Martin Liška 2019-11-13 11:32 ` [PATCH] Add if-chain to switch conversion pass Martin Liška 1 sibling, 2 replies; 49+ messages in thread From: Richard Biener @ 2019-11-05 12:38 UTC (permalink / raw) To: Jakub Jelinek; +Cc: Martin Liška, GCC Patches, kazu, Jan Hubicka On Mon, Nov 4, 2019 at 3:49 PM Jakub Jelinek <jakub@redhat.com> wrote: > > On Mon, Nov 04, 2019 at 03:23:20PM +0100, Martin Liška wrote: > > The patch adds a new pass that identifies a series of if-elseif > > statements and transform then into a GIMPLE switch (if possible). > > The pass runs right after tree-ssa pass and I decided to implement > > matching of various forms that are introduced by folder (fold_range_test): > > Not a review, just a few questions: Likewise - please do not name switches -ftree-*, 'tree' doens't add anything but confusion to users. Thus use -fif-to-switch or -fconvert-if-to-switch +The transformation can help to produce a faster code for +the switch statement. produce faster code. Doesn't it also produce smaller code eventually? Please to not put code transform passes into build_ssa_passes (why did you choose this place)? The pass should go into pass_all_early_optimizations instead, and I'm quite sure you want to run _after_ CSE. I'd even say that the pass should run as part of switch-conversion, so we build a representation of a switch internally and then code-generate the optimal form directly. For now just put the pass before switch-conversion. There are functions without comments in the patch and you copied from DSE which shows in confusing comments left over from the original. + mark_virtual_operands_for_renaming (cfun); if you did nothing renaming all vops is expensive. I'm missing an overall comment - you are using a dominator walk but do nothing in the after hook which means you are not really gathering any data? You're also setting visited bits on BBs which means you are visiting alternate BBs during the DOM walk. > 1) what does it do if __builtin_expect* has been used, does it preserve > the probabilities and if in the end decides to expand as ifs, are those > probabilities retained through it? > 2) for the reassoc-*.c testcases, do you get identical or better code > with the patch? > 3) shouldn't it be gimple-if-to-switch.c instead? > 4) what code size effect does the patch have say on cc1plus (if you don't > count the code changes of the patch itself, i.e. revert the patch in the > stage3 and rebuild just the stage3)? > > > +struct case_range > > +{ > > + /* Default constructor. */ > > + case_range (): > > + m_min (NULL_TREE), m_max (NULL_TREE) > > I admit I'm never sure about coding conventions for C++, > but shouldn't there be a space before :, or even better : > be on the next line before m_min ? > > Jakub > ^ permalink raw reply [flat|nested] 49+ messages in thread
* Re: [PATCH] Add if-chain to switch conversion pass. 2019-11-05 12:38 ` Richard Biener @ 2019-11-06 21:03 ` Bernhard Reutner-Fischer 2019-11-14 9:44 ` Martin Liška 2019-11-14 9:41 ` Martin Liška 1 sibling, 1 reply; 49+ messages in thread From: Bernhard Reutner-Fischer @ 2019-11-06 21:03 UTC (permalink / raw) To: Martin Liška Cc: Richard Biener, Jakub Jelinek, GCC Patches, kazu, Jan Hubicka, Bernhard Reutner-Fischer On Tue, 5 Nov 2019 13:38:27 +0100 Richard Biener <richard.guenther@gmail.com> wrote: > On Mon, Nov 4, 2019 at 3:49 PM Jakub Jelinek <jakub@redhat.com> wrote: > > > > On Mon, Nov 04, 2019 at 03:23:20PM +0100, Martin Liška wrote: > > > The patch adds a new pass that identifies a series of if-elseif > > > statements and transform then into a GIMPLE switch (if possible). > > > The pass runs right after tree-ssa pass and I decided to implement > > > matching of various forms that are introduced by folder (fold_range_test): > > > > Not a review, just a few questions: > > Likewise - please do not name switches -ftree-*, 'tree' doens't add anything > but confusion to users. Thus use -fif-to-switch or -fconvert-if-to-switch > > +The transformation can help to produce a faster code for > +the switch statement. > > produce faster code. > > Doesn't it also produce smaller code eventually? > > Please to not put code transform passes into build_ssa_passes (why did > you choose this place)? The pass should go into pass_all_early_optimizations > instead, and I'm quite sure you want to run _after_ CSE. I'd even say > that the pass should run as part of switch-conversion, so we build > a representation of a switch internally and then code-generate the optimal > form directly. For now just put the pass before switch-conversion. Also why do you punt on duplicate conditions like in > +++ b/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-4.c > +int main(int argc, char **argv) > +{ > + if (argc == 1) > + else if (argc == 2) > + else if (argc == 3) > + else if (argc == 4) > + else if (argc == 1) > + { This block is dead, isn't it. Why don't you just discard it but punt? > + global = 2; > + } > + else > + global -= 123; thanks, > > There are functions without comments in the patch and you copied > from DSE which shows in confusing comments left over from the original. > > + mark_virtual_operands_for_renaming (cfun); > > if you did nothing renaming all vops is expensive. > > I'm missing an overall comment - you are using a dominator walk > but do nothing in the after hook which means you are not really > gathering any data? You're also setting visited bits on BBs which > means you are visiting alternate BBs during the DOM walk. > > > 1) what does it do if __builtin_expect* has been used, does it preserve > > the probabilities and if in the end decides to expand as ifs, are those > > probabilities retained through it? > > 2) for the reassoc-*.c testcases, do you get identical or better code > > with the patch? > > 3) shouldn't it be gimple-if-to-switch.c instead? > > 4) what code size effect does the patch have say on cc1plus (if you don't > > count the code changes of the patch itself, i.e. revert the patch in the > > stage3 and rebuild just the stage3)? > > > > > +struct case_range > > > +{ > > > + /* Default constructor. */ > > > + case_range (): > > > + m_min (NULL_TREE), m_max (NULL_TREE) > > > > I admit I'm never sure about coding conventions for C++, > > but shouldn't there be a space before :, or even better : > > be on the next line before m_min ? > > > > Jakub > > ^ permalink raw reply [flat|nested] 49+ messages in thread
* Re: [PATCH] Add if-chain to switch conversion pass. 2019-11-06 21:03 ` Bernhard Reutner-Fischer @ 2019-11-14 9:44 ` Martin Liška 2019-11-14 12:35 ` Bernhard Reutner-Fischer 0 siblings, 1 reply; 49+ messages in thread From: Martin Liška @ 2019-11-14 9:44 UTC (permalink / raw) To: Bernhard Reutner-Fischer Cc: Richard Biener, Jakub Jelinek, GCC Patches, Jan Hubicka On 11/6/19 10:02 PM, Bernhard Reutner-Fischer wrote: > Also why do you punt on duplicate conditions like in > >> +++ b/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-4.c >> +int main(int argc, char **argv) >> +{ >> + if (argc == 1) >> + else if (argc == 2) >> + else if (argc == 3) >> + else if (argc == 4) >> + else if (argc == 1) >> + { > This block is dead, isn't it. Why don't you just discard it but punt? > Hello. After I moved the pass later in optimization pipeline, such dead conditions are already gone. What's remaining are situations like: if (argc >= 1 && argc <= 10) ... else if (argc >= 8 && argc <= 15) which are overlapping intervals. I'm not planning to handle these in the first iteration of the patch. Martin ^ permalink raw reply [flat|nested] 49+ messages in thread
* Re: [PATCH] Add if-chain to switch conversion pass. 2019-11-14 9:44 ` Martin Liška @ 2019-11-14 12:35 ` Bernhard Reutner-Fischer 0 siblings, 0 replies; 49+ messages in thread From: Bernhard Reutner-Fischer @ 2019-11-14 12:35 UTC (permalink / raw) To: Martin Liška Cc: Richard Biener, Jakub Jelinek, GCC Patches, Jan Hubicka, Bernhard Reutner-Fischer On Thu, 14 Nov 2019 10:41:25 +0100 Martin Liška <mliska@suse.cz> wrote: > On 11/6/19 10:02 PM, Bernhard Reutner-Fischer wrote: > > Also why do you punt on duplicate conditions like in > > > >> +++ b/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-4.c > >> +int main(int argc, char **argv) > >> +{ > >> + if (argc == 1) > >> + else if (argc == 2) > >> + else if (argc == 3) > >> + else if (argc == 4) > >> + else if (argc == 1) > >> + { > > This block is dead, isn't it. Why don't you just discard it but punt? > > > > Hello. > > After I moved the pass later in optimization pipeline, such dead conditions nice > are already gone. What's remaining are situations like: > > if (argc >= 1 && argc <= 10) > ... > else if (argc >= 8 && argc <= 15) > > which are overlapping intervals. I'm not planning to handle these in the first > iteration of the patch. yea. Later when we see a new interval overlapping old, we can adjust the new to clamp to the intersection of old and new. We'd need to generate one or more artificial intervals covering the delta interval with the body of new if we find intervening previous intervals, which complicates things more than a first attempt of a patch should supposedly do, agree. One step at a time :) thanks for moving it later in the pipeline! cheers, ^ permalink raw reply [flat|nested] 49+ messages in thread
* Re: [PATCH] Add if-chain to switch conversion pass. 2019-11-05 12:38 ` Richard Biener 2019-11-06 21:03 ` Bernhard Reutner-Fischer @ 2019-11-14 9:41 ` Martin Liška 2019-11-14 10:48 ` Richard Biener 1 sibling, 1 reply; 49+ messages in thread From: Martin Liška @ 2019-11-14 9:41 UTC (permalink / raw) To: Richard Biener, Jakub Jelinek; +Cc: GCC Patches, kazu, Jan Hubicka On 11/5/19 1:38 PM, Richard Biener wrote: > On Mon, Nov 4, 2019 at 3:49 PM Jakub Jelinek <jakub@redhat.com> wrote: >> >> On Mon, Nov 04, 2019 at 03:23:20PM +0100, Martin LiÅ¡ka wrote: >>> The patch adds a new pass that identifies a series of if-elseif >>> statements and transform then into a GIMPLE switch (if possible). >>> The pass runs right after tree-ssa pass and I decided to implement >>> matching of various forms that are introduced by folder (fold_range_test): >> >> Not a review, just a few questions: Hello. > > Likewise - please do not name switches -ftree-*, 'tree' doens't add anything > but confusion to users. Thus use -fif-to-switch or -fconvert-if-to-switch Agree with you, I selected the later option. > > +The transformation can help to produce a faster code for > +the switch statement. > > produce faster code. Fixed. > > Doesn't it also produce smaller code eventually? In some situation yes, but generally it leads to more jump tables (which are bigger when expanded). > > Please to not put code transform passes into build_ssa_passes (why did > you choose this place)? Well, that was my initial pass selection as I wanted to have a GIMPLE code close to what FEs produce. > The pass should go into pass_all_early_optimizations > instead, and I'm quite sure you want to run _after_ CSE. I'd even say > that the pass should run as part of switch-conversion, so we build > a representation of a switch internally and then code-generate the optimal > form directly. For now just put the pass before switch-conversion. But yes, the suggested place is much better place and we can benefit from VRP (that will kill dead conditions in a if-else chain) > > There are functions without comments in the patch and you copied > from DSE which shows in confusing comments left over from the original. > > + mark_virtual_operands_for_renaming (cfun); > > if you did nothing renaming all vops is expensive. This one is needed for situations like: fn1 () { <unnamed type> a.0_1; <bb 2> : # VUSE <.MEM_5(D)> a.0_1 = a; if (a.0_1 == 0) goto <bb 6>; [INV] else goto <bb 3>; [INV] <bb 3> : if (a.0_1 == 1) goto <bb 6>; [INV] else goto <bb 4>; [INV] <bb 4> : if (a.0_1 == 2) goto <bb 5>; [INV] else goto <bb 6>; [INV] <bb 5> : # .MEM_6 = VDEF <.MEM_5(D)> fn2 (); <bb 6> : # .MEM_4 = PHI <.MEM_5(D)(2), .MEM_5(D)(3), .MEM_5(D)(4), .MEM_6(5)> # VUSE <.MEM_4> return; } where without the call, I end up with: <bb 2> : # VUSE <.MEM_5(D)> a.0_1 = a; switch (a.0_1) <default: <L8> [INV], case 0: <L8> [INV], case 1: <L8> [INV], case 2: <L9> [INV]> <bb 3> : <L9>: # .MEM_6 = VDEF <.MEM_5(D)> fn2 (); <bb 4> : # .MEM_4 = PHI <.MEM_6(3), (2)> > > I'm missing an overall comment - you are using a dominator walk > but do nothing in the after hook which means you are not really > gathering any data? You're also setting visited bits on BBs which > means you are visiting alternate BBs during the DOM walk. You are right, I'm a bit cheating with the DOM walk as I also mark visited BBs. What I want is for each if-else condition, I want to visit the first IF in such chain. That's why I decided to iterate in DOMINATOR order. Can I do it simpler? Thanks, Martin > >> 1) what does it do if __builtin_expect* has been used, does it preserve >> the probabilities and if in the end decides to expand as ifs, are those >> probabilities retained through it? >> 2) for the reassoc-*.c testcases, do you get identical or better code >> with the patch? >> 3) shouldn't it be gimple-if-to-switch.c instead? >> 4) what code size effect does the patch have say on cc1plus (if you don't >> count the code changes of the patch itself, i.e. revert the patch in the >> stage3 and rebuild just the stage3)? >> >>> +struct case_range >>> +{ >>> + /* Default constructor. */ >>> + case_range (): >>> + m_min (NULL_TREE), m_max (NULL_TREE) >> >> I admit I'm never sure about coding conventions for C++, >> but shouldn't there be a space before :, or even better : >> be on the next line before m_min ? >> >> Jakub >> ^ permalink raw reply [flat|nested] 49+ messages in thread
* Re: [PATCH] Add if-chain to switch conversion pass. 2019-11-14 9:41 ` Martin Liška @ 2019-11-14 10:48 ` Richard Biener 2019-11-15 13:56 ` Martin Liška 0 siblings, 1 reply; 49+ messages in thread From: Richard Biener @ 2019-11-14 10:48 UTC (permalink / raw) To: Martin Liška; +Cc: Jakub Jelinek, GCC Patches, kazu, Jan Hubicka On Thu, Nov 14, 2019 at 10:39 AM Martin Liška <mliska@suse.cz> wrote: > > On 11/5/19 1:38 PM, Richard Biener wrote: > > On Mon, Nov 4, 2019 at 3:49 PM Jakub Jelinek <jakub@redhat.com> wrote: > >> > >> On Mon, Nov 04, 2019 at 03:23:20PM +0100, Martin Liška wrote: > >>> The patch adds a new pass that identifies a series of if-elseif > >>> statements and transform then into a GIMPLE switch (if possible). > >>> The pass runs right after tree-ssa pass and I decided to implement > >>> matching of various forms that are introduced by folder (fold_range_test): > >> > >> Not a review, just a few questions: > > Hello. > > > > > Likewise - please do not name switches -ftree-*, 'tree' doens't add anything > > but confusion to users. Thus use -fif-to-switch or -fconvert-if-to-switch > > Agree with you, I selected the later option. > > > > > +The transformation can help to produce a faster code for > > +the switch statement. > > > > produce faster code. > > Fixed. > > > > > Doesn't it also produce smaller code eventually? > > In some situation yes, but generally it leads to more jump tables > (which are bigger when expanded). > > > > > Please to not put code transform passes into build_ssa_passes (why did > > you choose this place)? > > Well, that was my initial pass selection as I wanted to have a GIMPLE > code close to what FEs produce. > > > The pass should go into pass_all_early_optimizations > > instead, and I'm quite sure you want to run _after_ CSE. I'd even say > > that the pass should run as part of switch-conversion, so we build > > a representation of a switch internally and then code-generate the optimal > > form directly. For now just put the pass before switch-conversion. > > But yes, the suggested place is much better place and we can benefit from > VRP (that will kill dead conditions in a if-else chain) > > > > > There are functions without comments in the patch and you copied > > from DSE which shows in confusing comments left over from the original. > > > > + mark_virtual_operands_for_renaming (cfun); > > > > if you did nothing renaming all vops is expensive. > > This one is needed for situations like: > > fn1 () > { > <unnamed type> a.0_1; > > <bb 2> : > # VUSE <.MEM_5(D)> > a.0_1 = a; > if (a.0_1 == 0) > goto <bb 6>; [INV] > else > goto <bb 3>; [INV] > > <bb 3> : > if (a.0_1 == 1) > goto <bb 6>; [INV] > else > goto <bb 4>; [INV] > > <bb 4> : > if (a.0_1 == 2) > goto <bb 5>; [INV] > else > goto <bb 6>; [INV] > > <bb 5> : > # .MEM_6 = VDEF <.MEM_5(D)> > fn2 (); > > <bb 6> : > # .MEM_4 = PHI <.MEM_5(D)(2), .MEM_5(D)(3), .MEM_5(D)(4), .MEM_6(5)> > # VUSE <.MEM_4> > return; > > } > > where without the call, I end up with: > > <bb 2> : > # VUSE <.MEM_5(D)> > a.0_1 = a; > switch (a.0_1) <default: <L8> [INV], case 0: <L8> [INV], case 1: <L8> [INV], case 2: <L9> [INV]> > > <bb 3> : > <L9>: > # .MEM_6 = VDEF <.MEM_5(D)> > fn2 (); > > <bb 4> : > # .MEM_4 = PHI <.MEM_6(3), (2)> I meant you are doing it unconditionally even if you didn't transform any if-then-else chain. > > > > > I'm missing an overall comment - you are using a dominator walk > > but do nothing in the after hook which means you are not really > > gathering any data? You're also setting visited bits on BBs which > > means you are visiting alternate BBs during the DOM walk. > > You are right, I'm a bit cheating with the DOM walk as I also mark visited BBs. > What I want is for each if-else condition, I want to visit the first IF in such > chain. That's why I decided to iterate in DOMINATOR order. > Can I do it simpler? Put that in a comment, do away with domwalk and instead start from ENTRY_BLOCK, using a worklist seeded by {first,next}_dom_son () and avoid putting visited blocks on that worklist. Btw, what about if-chains nested in another if-chain? Don't you want to transform "inner" chains first or does it really not matter (you're adjusting the CFG, doing that inside the domwalk is fishy since that also uses pre-computed RPO order; the simple dom-son walking should work but you of course might miss some blocks depending on how you set up things). Richard. > Thanks, > Martin > > > > >> 1) what does it do if __builtin_expect* has been used, does it preserve > >> the probabilities and if in the end decides to expand as ifs, are those > >> probabilities retained through it? > >> 2) for the reassoc-*.c testcases, do you get identical or better code > >> with the patch? > >> 3) shouldn't it be gimple-if-to-switch.c instead? > >> 4) what code size effect does the patch have say on cc1plus (if you don't > >> count the code changes of the patch itself, i.e. revert the patch in the > >> stage3 and rebuild just the stage3)? > >> > >>> +struct case_range > >>> +{ > >>> + /* Default constructor. */ > >>> + case_range (): > >>> + m_min (NULL_TREE), m_max (NULL_TREE) > >> > >> I admit I'm never sure about coding conventions for C++, > >> but shouldn't there be a space before :, or even better : > >> be on the next line before m_min ? > >> > >> Jakub > >> > ^ permalink raw reply [flat|nested] 49+ messages in thread
* Re: [PATCH] Add if-chain to switch conversion pass. 2019-11-14 10:48 ` Richard Biener @ 2019-11-15 13:56 ` Martin Liška 2020-09-01 11:47 ` Martin Liška 0 siblings, 1 reply; 49+ messages in thread From: Martin Liška @ 2019-11-15 13:56 UTC (permalink / raw) To: Richard Biener; +Cc: Jakub Jelinek, GCC Patches, kazu, Jan Hubicka [-- Attachment #1: Type: text/plain, Size: 5929 bytes --] On 11/14/19 11:37 AM, Richard Biener wrote: > On Thu, Nov 14, 2019 at 10:39 AM Martin LiÅ¡ka <mliska@suse.cz> wrote: >> >> On 11/5/19 1:38 PM, Richard Biener wrote: >>> On Mon, Nov 4, 2019 at 3:49 PM Jakub Jelinek <jakub@redhat.com> wrote: >>>> >>>> On Mon, Nov 04, 2019 at 03:23:20PM +0100, Martin LiÅ¡ka wrote: >>>>> The patch adds a new pass that identifies a series of if-elseif >>>>> statements and transform then into a GIMPLE switch (if possible). >>>>> The pass runs right after tree-ssa pass and I decided to implement >>>>> matching of various forms that are introduced by folder (fold_range_test): >>>> >>>> Not a review, just a few questions: >> >> Hello. >> >>> >>> Likewise - please do not name switches -ftree-*, 'tree' doens't add anything >>> but confusion to users. Thus use -fif-to-switch or -fconvert-if-to-switch >> >> Agree with you, I selected the later option. >> >>> >>> +The transformation can help to produce a faster code for >>> +the switch statement. >>> >>> produce faster code. >> >> Fixed. >> >>> >>> Doesn't it also produce smaller code eventually? >> >> In some situation yes, but generally it leads to more jump tables >> (which are bigger when expanded). >> >>> >>> Please to not put code transform passes into build_ssa_passes (why did >>> you choose this place)? >> >> Well, that was my initial pass selection as I wanted to have a GIMPLE >> code close to what FEs produce. >> >>> The pass should go into pass_all_early_optimizations >>> instead, and I'm quite sure you want to run _after_ CSE. I'd even say >>> that the pass should run as part of switch-conversion, so we build >>> a representation of a switch internally and then code-generate the optimal >>> form directly. For now just put the pass before switch-conversion. >> >> But yes, the suggested place is much better place and we can benefit from >> VRP (that will kill dead conditions in a if-else chain) >> >>> >>> There are functions without comments in the patch and you copied >>> from DSE which shows in confusing comments left over from the original. >>> >>> + mark_virtual_operands_for_renaming (cfun); >>> >>> if you did nothing renaming all vops is expensive. >> >> This one is needed for situations like: >> >> fn1 () >> { >> <unnamed type> a.0_1; >> >> <bb 2> : >> # VUSE <.MEM_5(D)> >> a.0_1 = a; >> if (a.0_1 == 0) >> goto <bb 6>; [INV] >> else >> goto <bb 3>; [INV] >> >> <bb 3> : >> if (a.0_1 == 1) >> goto <bb 6>; [INV] >> else >> goto <bb 4>; [INV] >> >> <bb 4> : >> if (a.0_1 == 2) >> goto <bb 5>; [INV] >> else >> goto <bb 6>; [INV] >> >> <bb 5> : >> # .MEM_6 = VDEF <.MEM_5(D)> >> fn2 (); >> >> <bb 6> : >> # .MEM_4 = PHI <.MEM_5(D)(2), .MEM_5(D)(3), .MEM_5(D)(4), .MEM_6(5)> >> # VUSE <.MEM_4> >> return; >> >> } >> >> where without the call, I end up with: >> >> <bb 2> : >> # VUSE <.MEM_5(D)> >> a.0_1 = a; >> switch (a.0_1) <default: <L8> [INV], case 0: <L8> [INV], case 1: <L8> [INV], case 2: <L9> [INV]> >> >> <bb 3> : >> <L9>: >> # .MEM_6 = VDEF <.MEM_5(D)> >> fn2 (); >> >> <bb 4> : >> # .MEM_4 = PHI <.MEM_6(3), (2)> > > I meant you are doing it unconditionally even if you didn't transform > any if-then-else chain. Ah, I've got it ;) > >> >>> >>> I'm missing an overall comment - you are using a dominator walk >>> but do nothing in the after hook which means you are not really >>> gathering any data? You're also setting visited bits on BBs which >>> means you are visiting alternate BBs during the DOM walk. >> >> You are right, I'm a bit cheating with the DOM walk as I also mark visited BBs. >> What I want is for each if-else condition, I want to visit the first IF in such >> chain. That's why I decided to iterate in DOMINATOR order. >> Can I do it simpler? > > Put that in a comment, do away with domwalk and instead start from > ENTRY_BLOCK, using a worklist seeded by {first,next}_dom_son () > and avoid putting visited blocks on that worklist. Rewritten to that pattern. Thank you for it, the code is much smaller as the dom walker is really not needed. > > Btw, what about if-chains nested in another if-chain? Yes, it's supported. Actually the comparison BBs in a pair of if-chains can't overlap, so all is fine and we can't mess up CFG. Moreover, I first walk the DOM, analyze all if-chains and later then all the candidates are transformed. > Don't you want to > transform "inner" chains first or does it really not matter (you're adjusting > the CFG, doing that inside the domwalk is fishy since that also uses > pre-computed RPO order; the simple dom-son walking should work > but you of course might miss some blocks depending on how you set up > things). As explained, it's not a deal. Patch can bootstrap on x86_64-linux-gnu and survives regression tests. I'm also sending dump for make all-host. Ready to be installed? Thanks, Martin > > Richard. > >> Thanks, >> Martin >> >>> >>>> 1) what does it do if __builtin_expect* has been used, does it preserve >>>> the probabilities and if in the end decides to expand as ifs, are those >>>> probabilities retained through it? >>>> 2) for the reassoc-*.c testcases, do you get identical or better code >>>> with the patch? >>>> 3) shouldn't it be gimple-if-to-switch.c instead? >>>> 4) what code size effect does the patch have say on cc1plus (if you don't >>>> count the code changes of the patch itself, i.e. revert the patch in the >>>> stage3 and rebuild just the stage3)? >>>> >>>>> +struct case_range >>>>> +{ >>>>> + /* Default constructor. */ >>>>> + case_range (): >>>>> + m_min (NULL_TREE), m_max (NULL_TREE) >>>> >>>> I admit I'm never sure about coding conventions for C++, >>>> but shouldn't there be a space before :, or even better : >>>> be on the next line before m_min ? >>>> >>>> Jakub >>>> >> [-- Attachment #2: if-to-switch-in-gcc.txt --] [-- Type: text/plain, Size: 224518 bytes --] Condition chain (at ../../gcc/alias.c:2854) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/alias.c:2856) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/asan.c:2645) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/asan.h:166) with 12 conditions (9 BBs) transformed into a switch statement. Condition chain (at ../../gcc/asan.h:166) with 12 conditions (9 BBs) transformed into a switch statement. Condition chain (at ../../gcc/attribs.c:733) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/builtins.c:10683) with 6 conditions (5 BBs) transformed into a switch statement. Condition chain (at ../../gcc/builtins.c:2574) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/builtins.c:2600) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/builtins.c:3663) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/builtins.c:427) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/builtins.c:6717) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/builtins.c:8511) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/builtins.c:8567) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/builtins.c:8568) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/caller-save.c:1015) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/calls.c:1530) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/calls.c:1553) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/calls.c:2425) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/calls.c:630) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/c/c-convert.c:91) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/c/c-decl.c:10425) with 10 conditions (10 BBs) transformed into a switch statement. Condition chain (at ../../gcc/c/c-decl.c:10482) with 11 conditions (11 BBs) transformed into a switch statement. Condition chain (at ../../gcc/c/c-decl.c:10543) with 9 conditions (9 BBs) transformed into a switch statement. Condition chain (at ../../gcc/c/c-decl.c:10595) with 9 conditions (9 BBs) transformed into a switch statement. Condition chain (at ../../gcc/c/c-decl.c:10646) with 8 conditions (8 BBs) transformed into a switch statement. Condition chain (at ../../gcc/c/c-decl.c:10692) with 12 conditions (12 BBs) transformed into a switch statement. Condition chain (at ../../gcc/c/c-decl.c:11270) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/c/c-decl.c:11930) with 4 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/c/c-decl.c:2095) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/c/c-decl.c:5194) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/c/c-decl.c:5304) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/c/c-decl.c:5661) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/c/c-decl.c:6356) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/c/c-decl.c:6505) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/c/c-decl.c:7400) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/c/c-decl.c:7422) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/c/c-decl.c:8110) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/c/c-decl.c:8177) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/c/c-decl.c:8309) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/c/c-decl.c:8412) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/c/c-decl.c:9552) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/c/c-fold.c:265) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/c/c-fold.c:284) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/c/c-fold.c:356) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/c/c-fold.c:464) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/c/c-fold.c:515) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/c/c-fold.c:562) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/c/c-fold.c:615) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/c/c-fold.c:664) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/c/c-parser.c:12308) with 4 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/c/c-parser.c:17729) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/c/c-parser.c:2576) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/c/c-parser.c:351) with 8 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/c/c-typeck.c:10041) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/c/c-typeck.c:10398) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/c/c-typeck.c:10634) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/c/c-typeck.c:11449) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/c/c-typeck.c:12613) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/c/c-typeck.c:12901) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/c/c-typeck.c:13014) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/c/c-typeck.c:13082) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/c/c-typeck.c:13319) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/c/c-typeck.c:13351) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/c/c-typeck.c:13377) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/c/c-typeck.c:13977) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/c/c-typeck.c:1878) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/c/c-typeck.c:1912) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/c/c-typeck.c:1973) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/c/c-typeck.c:2238) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/c/c-typeck.c:2284) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/c/c-typeck.c:2323) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/c/c-typeck.c:2527) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/c/c-typeck.c:2814) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/c/c-typeck.c:3028) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/c/c-typeck.c:3177) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/c/c-typeck.c:3547) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/c/c-typeck.c:3812) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/c/c-typeck.c:4329) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/c/c-typeck.c:5083) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/c/c-typeck.c:5481) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/c/c-typeck.c:6263) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/c/c-typeck.c:6814) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/c/c-typeck.c:6818) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/c/c-typeck.c:7517) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/c/c-typeck.c:7525) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/c/c-typeck.c:7713) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/c/c-typeck.c:8205) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/c/c-typeck.c:9399) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/c/c-typeck.c:9656) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/c/c-typeck.c:9909) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/c/c-typeck.c:9984) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/c-family/c-ada-spec.c:2234) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/c-family/c-ada-spec.c:2264) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/c-family/c-ada-spec.c:2795) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/c-family/c-ada-spec.c:467) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at ../../gcc/c-family/c-ada-spec.c:643) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/c-family/c-attribs.c:1305) with 6 conditions (5 BBs) transformed into a switch statement. Condition chain (at ../../gcc/c-family/c-attribs.c:1819) with 4 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/c-family/c-attribs.c:1819) with 8 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/c-family/c-attribs.c:1865) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/c-family/c-attribs.c:2470) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/c-family/c-attribs.c:2505) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/c-family/c-attribs.c:3492) with 4 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/c-family/c-attribs.c:3762) with 4 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/c-family/c-common.c:1334) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/c-family/c-common.c:2238) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/c-family/c-common.c:2899) with 6 conditions (6 BBs) transformed into a switch statement. Condition chain (at ../../gcc/c-family/c-common.c:3232) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/c-family/c-common.c:3640) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/c-family/c-common.c:3723) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/c-family/c-common.c:6107) with 10 conditions (10 BBs) transformed into a switch statement. Condition chain (at ../../gcc/c-family/c-format.c:2443) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/c-family/c-format.c:3652) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/c-family/c-format.c:5211) with 7 conditions (6 BBs) transformed into a switch statement. Condition chain (at ../../gcc/c-family/c-format.c:5228) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/c-family/c-lex.c:1067) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/c-family/c-lex.c:1090) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/c-family/c-lex.c:1116) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/c-family/c-lex.c:1139) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/c-family/c-lex.c:1371) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/c-family/c-lex.c:429) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/c-family/c-lex.c:546) with 8 conditions (7 BBs) transformed into a switch statement. Condition chain (at ../../gcc/c-family/c-omp.c:1563) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/c-family/c-omp.c:1757) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/c-family/c-omp.c:2117) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/c-family/c-opts.c:1458) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/c-family/c-pragma.c:142) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/c-family/c-pretty-print.c:1759) with 5 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/c-family/c-pretty-print.c:1952) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/c-family/c-pretty-print.c:401) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/c-family/c-warn.c:1442) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/c-family/c-warn.c:1696) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at ../../gcc/c-family/c-warn.c:1917) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/c-family/c-warn.c:1941) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/c-family/c-warn.c:2008) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/c-family/c-warn.c:2014) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/c-family/c-warn.c:2165) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/c-family/c-warn.c:217) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/c-family/c-warn.c:2850) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/c-family/c-warn.c:491) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/c-family/c-warn.c:51) with 5 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/c-family/c-warn.c:68) with 5 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cfgexpand.c:224) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cfgexpand.c:2500) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cfgexpand.c:2702) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cfgexpand.c:5018) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cfgexpand.c:5766) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cfgexpand.c:6119) with 6 conditions (6 BBs) transformed into a switch statement. Condition chain (at ../../gcc/c/gimple-parser.c:744) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cgraph.h:2618) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cgraph.h:2618) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cgraph.h:2618) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cgraph.h:2618) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cgraph.h:2618) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cgraph.h:2618) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cgraph.h:2618) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cgraph.h:2618) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/combine.c:10659) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/combine.c:11865) with 4 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/combine.c:11880) with 5 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/combine.c:11885) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/combine.c:12945) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/combine.c:14044) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/combine.c:2756) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/combine.c:3933) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/combine.c:5544) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/combine.c:6234) with 5 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/combine.c:6687) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/combine.c:6697) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/combine.c:6779) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/combine.c:8725) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/combine.c:9390) with 5 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/combine.c:9584) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/constraints.md:233) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/constraints.md:234) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/constraints.md:234) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/driver-i386.c:642) with 5 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.c:12094) with 4 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.c:12964) with 6 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.c:14682) with 5 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.c:15004) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.c:15007) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.c:15699) with 4 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.c:16195) with 24 conditions (24 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.c:16207) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.c:1856) with 4 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.c:18686) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.c:18714) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.c:18740) with 12 conditions (10 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.c:18749) with 8 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.c:18755) with 16 conditions (16 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.c:18767) with 8 conditions (8 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.c:18779) with 8 conditions (8 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.c:18935) with 7 conditions (7 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.c:18936) with 7 conditions (7 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.c:18937) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.c:18938) with 6 conditions (5 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.c:18940) with 6 conditions (6 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.c:18974) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.c:18981) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.c:19026) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.c:19367) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.c:19383) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.c:20664) with 6 conditions (5 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.c:20666) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.c:20668) with 7 conditions (7 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.c:20670) with 7 conditions (7 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.c:20672) with 6 conditions (6 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.c:21282) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.c:21596) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.c:21645) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.c:22142) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.c:2280) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.c:2620) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.c:2882) with 14 conditions (14 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.c:3322) with 22 conditions (22 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.c:3562) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.c:3569) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.c:3573) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.c:3577) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.c:3699) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.c:3809) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.c:3832) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.c:3840) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.c:3849) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.c:9548) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.c:9703) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386-expand.c:10033) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386-expand.c:10035) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386-expand.c:10359) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386-expand.c:10778) with 4 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386-expand.c:10810) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386-expand.c:11420) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386-expand.c:12461) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386-expand.c:12510) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386-expand.c:14098) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386-expand.c:15563) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386-expand.c:15588) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386-expand.c:15640) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386-expand.c:15728) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386-expand.c:16754) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386-expand.c:16803) with 6 conditions (6 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386-expand.c:16889) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386-expand.c:1715) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386-expand.c:2711) with 9 conditions (5 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386-expand.c:3524) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386-expand.c:3633) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386-expand.c:374) with 22 conditions (22 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386-expand.c:395) with 22 conditions (22 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386-expand.c:4068) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386-expand.c:4611) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386-expand.c:6604) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386-expand.c:6854) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386-expand.c:8206) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386-expand.c:8208) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386-expand.c:8412) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386-expand.c:8491) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386-expand.c:8526) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386-expand.c:8528) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386-expand.c:8571) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386-expand.c:8573) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386-expand.c:8621) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386-expand.c:8690) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386-expand.c:8692) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386-expand.c:8746) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386-expand.c:8748) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386-expand.c:8845) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386-expand.c:8847) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386-expand.c:9888) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386-features.c:547) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386-features.c:826) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:1030) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:1053) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:1090) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:1119) with 5 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:13092) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:13092) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:13105) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:13105) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:13115) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:13180) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:13285) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:13285) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:13298) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:13298) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:13304) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:13332) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:13400) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:13417) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:13421) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:13499) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:13499) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:13606) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:13606) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:13619) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:13619) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:13676) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:13678) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:1368) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:13700) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:13707) with 4 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:13726) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:13726) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:13736) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:13747) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:13747) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:13783) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:13844) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:13844) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:13850) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:13850) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:13861) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:13873) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:13947) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:13947) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:13975) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:13996) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:13996) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:14049) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:14049) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:14095) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:14216) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:14216) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:14246) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:14246) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:14258) with 5 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:14260) with 5 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:14349) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:14349) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:14451) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:14451) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:14757) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:1475) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:14761) with 4 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:14909) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:14913) with 4 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:15068) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:15068) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:1513) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:15256) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:1533) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:15370) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:15431) with 7 conditions (7 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:15431) with 7 conditions (7 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:15444) with 7 conditions (7 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:15444) with 7 conditions (7 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:15576) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:15613) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:15613) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:15790) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:15790) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:15849) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:15849) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:15995) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:15995) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:16131) with 7 conditions (7 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:16131) with 7 conditions (7 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:16184) with 7 conditions (7 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:16184) with 7 conditions (7 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:16289) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:16347) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:16347) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:16910) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:17151) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:17809) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:17932) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:18160) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:18162) with 6 conditions (6 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:18218) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:18264) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:18283) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:18340) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:18400) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:18419) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:18488) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:18564) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:18672) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:18899) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:1897) with 4 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:19448) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:19544) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:19703) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:19727) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:19804) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:2011) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:2063) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:21521) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:22332) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:2247) with 14 conditions (8 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:22566) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:2265) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:22705) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:2302) with 14 conditions (8 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:24826) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:24890) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:25143) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:26264) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:26656) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:26989) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:28447) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:28518) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:2884) with 13 conditions (10 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:3142) with 5 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:3161) with 5 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:3680) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:4350) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:4385) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:4420) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:4514) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:4548) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:471) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:493) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:5005) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:5299) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:5329) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:5383) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:5446) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:547) with 5 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:5508) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:555) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:5607) with 7 conditions (7 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:5646) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:5760) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:5800) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:614) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:640) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:742) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:767) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:818) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:826) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:839) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:856) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:860) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:860) with 7 conditions (7 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:885) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:885) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:910) with 4 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:910) with 4 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:912) with 6 conditions (6 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:912) with 7 conditions (5 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/i386.md:912) with 7 conditions (5 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/mmx.md:3314) with 4 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/predicates.md:1269) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/predicates.md:1290) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/predicates.md:1315) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/predicates.md:1324) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/predicates.md:1332) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/predicates.md:1488) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/predicates.md:1708) with 9 conditions (9 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/predicates.md:1768) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/predicates.md:1780) with 10 conditions (10 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/predicates.md:179) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/predicates.md:795) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/predicates.md:811) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/predicates.md:819) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/predicates.md:827) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/sse.md:1152) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/sse.md:1152) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/sse.md:1152) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/sse.md:1152) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/sse.md:1152) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/sse.md:1152) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/sse.md:1152) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/sse.md:1152) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/sse.md:1152) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/sse.md:1152) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/sse.md:1152) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/sse.md:1152) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/sse.md:1278) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/sse.md:1278) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/sse.md:1278) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/sse.md:1278) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/sse.md:1278) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/sse.md:1278) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/sse.md:1278) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/sse.md:1278) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/sse.md:1278) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/sse.md:1278) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/sse.md:1278) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/sse.md:1278) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/sse.md:15357) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/sse.md:15357) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/sse.md:20069) with 30 conditions (30 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/sync.md:2662) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/sync.md:2689) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/sync.md:2785) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/sync.md:2810) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/x86-tune-sched-bd.c:167) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/x86-tune-sched-bd.c:460) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/i386/x86-tune-sched-bd.c:593) with 4 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/config/linux.c:30) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/convert.c:266) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/call.c:10531) with 4 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/call.c:10535) with 4 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/call.c:3041) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/call.c:3048) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/call.c:5572) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/call.c:5574) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/call.c:7118) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/call.c:7234) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/call.c:7242) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/call.c:818) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/call.c:861) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/call.c:9511) with 7 conditions (7 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/class.c:7344) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/class.c:7533) with 7 conditions (7 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/class.c:7543) with 6 conditions (6 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/constexpr.c:2853) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/constexpr.c:3178) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/constexpr.c:339) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/constexpr.c:4937) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/constexpr.c:4981) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/constexpr.c:5812) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/constexpr.c:5945) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/constraint.cc:496) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/cp-gimplify.c:1170) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/cp-gimplify.c:2136) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/cp-gimplify.c:768) with 8 conditions (8 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/cp-tree.h:645) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/cvt.c:133) with 7 conditions (7 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/cvt.c:134) with 7 conditions (7 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/cvt.c:276) with 7 conditions (7 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/cvt.c:277) with 7 conditions (7 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/cxx-pretty-print.c:1438) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/cxx-pretty-print.c:2846) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/cxx-pretty-print.c:641) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/decl2.c:1204) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/decl2.c:1349) with 6 conditions (6 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/decl2.c:2521) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/decl2.c:397) with 7 conditions (7 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/decl2.c:5416) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/decl.c:1134) with 5 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/decl.c:13571) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/decl.c:13714) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/decl.c:14240) with 5 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/decl.c:15561) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/decl.c:15671) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/decl.c:17392) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/decl.c:2316) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/decl.c:2463) with 8 conditions (8 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/decl.c:2914) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/decl.c:5668) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/decl.c:6573) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/decl.c:7137) with 7 conditions (7 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/decl.c:8107) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/decl.c:8983) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/decl.c:970) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/error.c:1464) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/error.c:3085) with 4 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/friend.c:332) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/g++spec.c:230) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/init.c:184) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/init.c:2593) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/init.c:3386) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/init.c:459) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/lambda.c:1271) with 7 conditions (7 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/lex.c:693) with 6 conditions (6 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/logic.cc:385) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/logic.cc:427) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/logic.cc:494) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/logic.cc:535) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/mangle.c:2848) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/method.c:1299) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/method.c:1913) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/method.c:2060) with 4 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/method.c:3038) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/name-lookup.c:1023) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/name-lookup.c:2430) with 7 conditions (7 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/name-lookup.c:2641) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/name-lookup.c:6802) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/name-lookup.c:922) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/parser.c:10707) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/parser.c:11240) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/parser.c:11722) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/parser.c:13398) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/parser.c:16131) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/parser.c:17157) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/parser.c:1729) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/parser.c:20537) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/parser.c:22443) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/parser.c:22592) with 4 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/parser.c:22955) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/parser.c:24528) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/parser.c:24640) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/parser.c:26011) with 6 conditions (5 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/parser.c:2719) with 5 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/parser.c:2729) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/parser.c:27787) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/parser.c:28555) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/parser.c:28577) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/parser.c:28696) with 7 conditions (7 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/parser.c:29720) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/parser.c:30408) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/parser.c:30443) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/parser.c:30631) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/parser.c:30773) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/parser.c:31619) with 12 conditions (7 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/parser.c:31975) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/parser.c:33270) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/parser.c:33277) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/parser.c:37921) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/parser.c:40639) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/parser.c:42923) with 4 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/parser.c:7353) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/pt.c:10451) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/pt.c:12184) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/pt.c:12872) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/pt.c:19599) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/pt.c:20240) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/pt.c:20727) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/pt.c:22523) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/pt.c:27218) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/pt.c:3455) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/pt.c:5268) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/pt.c:5818) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/pt.c:5819) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/pt.c:6004) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/pt.c:7027) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/pt.c:7069) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/pt.c:9601) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/pt.c:9884) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cprop.c:1710) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/search.c:933) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/semantics.c:3773) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/semantics.c:4756) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/semantics.c:4822) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/semantics.c:4885) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/semantics.c:4953) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/semantics.c:5207) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/semantics.c:5239) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/semantics.c:5257) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/semantics.c:5598) with 4 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/semantics.c:5999) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/semantics.c:8083) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/tree.c:1745) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/tree.c:2220) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/tree.c:2253) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/tree.c:4392) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/tree.c:5260) with 8 conditions (8 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/tree.c:5388) with 8 conditions (8 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/tree.c:5408) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/tree.c:686) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/typeck2.c:1022) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/typeck2.c:315) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/typeck2.c:467) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/typeck.c:2511) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/typeck.c:3330) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/typeck.c:4450) with 5 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/typeck.c:4468) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/typeck.c:5989) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/typeck.c:6362) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/typeck.c:6387) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/typeck.c:6478) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/typeck.c:6539) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/typeck.c:6689) with 7 conditions (5 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/typeck.c:7730) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/typeck.c:8401) with 7 conditions (7 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/typeck.c:9286) with 7 conditions (7 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/typeck.c:9354) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/typeck.c:9698) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cp/type-utils.h:44) with 4 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cse.c:1972) with 5 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cse.c:3351) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cse.c:3633) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cse.c:5831) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cse.c:6125) with 5 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cse.c:6190) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cselib.c:1448) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cselib.c:1633) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cselib.c:2003) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cselib.c:465) with 5 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cselib.c:881) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/cselib.c:901) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/dbxout.c:1557) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/diagnostic-color.c:151) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/diagnostic-show-locus.c:1312) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/diagnostic-show-locus.c:700) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/diagnostic-show-locus.c:707) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/dojump.c:1026) with 4 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/dwarf2cfi.c:3190) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/dwarf2out.c:14548) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/dwarf2out.c:14558) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/dwarf2out.c:14570) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/dwarf2out.c:16910) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/dwarf2out.c:17131) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/dwarf2out.c:18192) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/dwarf2out.c:18392) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/dwarf2out.c:19803) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/dwarf2out.c:20851) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/dwarf2out.c:21670) with 4 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/dwarf2out.c:25347) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/dwarf2out.c:25561) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/dwarf2out.c:29752) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/dwarf2out.c:30070) with 4 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/dwarf2out.c:5410) with 4 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/dwarf2out.c:6852) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/dwarf2out.c:7125) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/dwarf2out.c:7922) with 4 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/dwarf2out.c:8613) with 4 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/emit-rtl.c:6391) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/emit-rtl.c:6412) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/emit-rtl.c:938) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at ../../gcc/emit-rtl.c:946) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at ../../gcc/emit-rtl.c:976) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at ../../gcc/explow.c:463) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/explow.c:683) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/expmed.c:1633) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at ../../gcc/expmed.c:1635) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at ../../gcc/expmed.c:1683) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at ../../gcc/expmed.c:1689) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at ../../gcc/expmed.c:1715) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/expmed.c:1744) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/expmed.c:2462) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/expmed.c:2462) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/expmed.c:6246) with 8 conditions (8 BBs) transformed into a switch statement. Condition chain (at ../../gcc/expmed.c:757) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at ../../gcc/expr.c:10232) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at ../../gcc/expr.c:11221) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/expr.c:11515) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/expr.c:12242) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/expr.c:2307) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at ../../gcc/expr.c:251) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/expr.c:281) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/expr.c:3760) with 10 conditions (7 BBs) transformed into a switch statement. Condition chain (at ../../gcc/expr.c:429) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/expr.c:429) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/expr.c:431) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/expr.c:6818) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at ../../gcc/expr.c:6835) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at ../../gcc/expr.c:7136) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/expr.c:7280) with 7 conditions (7 BBs) transformed into a switch statement. Condition chain (at ../../gcc/expr.c:729) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/expr.c:7697) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/expr.c:8538) with 4 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/expr.c:9919) with 4 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/final.c:1055) with 4 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/final.c:1431) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/final.c:1758) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/final.c:2318) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/final.c:2356) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/final.c:3325) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/final.c:3333) with 4 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/final.c:3743) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/final.c:3886) with 5 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fixed-value.c:1022) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fixed-value.c:1025) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fixed-value.c:1039) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fixed-value.c:1098) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fixed-value.c:1112) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fixed-value.c:126) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fixed-value.c:136) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fixed-value.c:145) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fixed-value.c:159) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fixed-value.c:182) with 4 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fixed-value.c:240) with 4 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fixed-value.c:328) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fixed-value.c:403) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fixed-value.c:518) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fixed-value.c:630) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fixed-value.c:682) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fixed-value.c:69) with 4 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fixed-value.c:782) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fixed-value.c:786) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fixed-value.c:790) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fixed-value.c:794) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fixed-value.c:823) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fixed-value.c:828) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fixed-value.c:886) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fixed-value.c:889) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fixed-value.c:890) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fixed-value.c:896) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fixed-value.c:937) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fixed-value.c:940) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fixed-value.c:95) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fixed-value.c:977) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fold-const.c:13260) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fold-const.c:13731) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fold-const.c:15076) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fold-const.c:1848) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fold-const.c:1913) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fold-const.c:2100) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fold-const.c:2105) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fold-const.c:2117) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fold-const.c:2279) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fold-const.c:2281) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fold-const.c:2435) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fold-const.c:2476) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fold-const.c:3933) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fold-const.c:412) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fold-const.c:434) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fold-const.c:4381) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fold-const.c:457) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fold-const.c:4636) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fold-const.c:5207) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fold-const.c:548) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fold-const.c:5717) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fold-const.c:6216) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fold-const.c:6227) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fold-const.c:6631) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fold-const.c:6977) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fold-const.c:800) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fold-const.c:8140) with 5 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fold-const.c:8376) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fold-const.c:8382) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fold-const.c:8391) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fold-const.c:8484) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fold-const.c:8607) with 4 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fold-const.c:9146) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fold-const.c:9760) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fold-const-call.c:662) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fold-const-call.c:672) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fold-const-call.c:673) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fortran/arith.c:1565) with 11 conditions (6 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fortran/check.c:1467) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fortran/check.c:324) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fortran/check.c:326) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fortran/check.c:3371) with 4 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fortran/check.c:413) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fortran/check.c:415) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fortran/check.c:4560) with 4 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fortran/check.c:7425) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fortran/convert.c:103) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fortran/cpp.c:596) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fortran/decl.c:10269) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fortran/decl.c:1061) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fortran/decl.c:4052) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fortran/decl.c:5369) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fortran/decl.c:6061) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fortran/decl.c:6073) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fortran/decl.c:6155) with 4 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fortran/dump-parse-tree.c:1205) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fortran/dump-parse-tree.c:1811) with 8 conditions (7 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fortran/dump-parse-tree.c:3182) with 6 conditions (6 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fortran/dump-parse-tree.c:3485) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fortran/expr.c:1896) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fortran/expr.c:2135) with 4 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fortran/expr.c:4869) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fortran/frontend-passes.c:406) with 4 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fortran/interface.c:1025) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fortran/interface.c:1058) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fortran/interface.c:1058) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fortran/interface.c:2100) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fortran/interface.c:4056) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fortran/intrinsic.c:4881) with 6 conditions (5 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fortran/intrinsic.c:953) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fortran/io.c:455) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fortran/iresolve.c:2569) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fortran/match.c:173) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fortran/match.c:214) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fortran/match.c:2184) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fortran/match.c:2862) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fortran/match.c:2890) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fortran/match.c:2999) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fortran/module.c:1018) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fortran/module.c:1040) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fortran/module.c:3501) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fortran/module.c:4474) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fortran/module.c:5250) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fortran/openmp.c:588) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fortran/parse.c:1376) with 4 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fortran/parse.c:1782) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fortran/parse.c:338) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fortran/parse.c:4213) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fortran/parse.c:4377) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fortran/primary.c:1155) with 4 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fortran/primary.c:3833) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fortran/resolve.c:11028) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fortran/resolve.c:1551) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fortran/resolve.c:15839) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fortran/resolve.c:1687) with 4 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fortran/resolve.c:2763) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fortran/resolve.c:3969) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fortran/resolve.c:4155) with 4 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fortran/resolve.c:547) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fortran/resolve.c:7750) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fortran/resolve.c:7942) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fortran/resolve.c:9326) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fortran/scanner.c:1038) with 5 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fortran/scanner.c:1553) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fortran/scanner.c:1801) with 5 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fortran/scanner.c:2180) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fortran/scanner.c:2376) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fortran/scanner.c:950) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fortran/scanner.c:979) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fortran/simplify.c:4151) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fortran/simplify.c:6848) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fortran/simplify.c:7591) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fortran/simplify.c:7673) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fortran/symbol.c:1765) with 7 conditions (5 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fortran/symbol.c:3710) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fortran/symbol.c:5214) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fortran/trans-array.c:5003) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fortran/trans.c:343) with 4 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fortran/trans.c:415) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fortran/trans-decl.c:2170) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fortran/trans-decl.c:5192) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fortran/trans-decl.c:5414) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fortran/trans-decl.c:5859) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fortran/trans-decl.c:888) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fortran/trans-decl.c:895) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fortran/trans-decl.c:912) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fortran/trans-expr.c:6304) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fortran/trans-expr.c:9612) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fortran/trans-intrinsic.c:4532) with 5 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fortran/trans-intrinsic.c:7234) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fortran/trans-intrinsic.c:7795) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fortran/trans-intrinsic.c:9183) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fortran/trans-intrinsic.c:9457) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fortran/trans-intrinsic.c:9501) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fortran/trans-io.c:2410) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fortran/trans-stmt.c:1734) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fortran/trans-stmt.c:6244) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fortran/trans-types.c:3238) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fortran/trans-types.c:567) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fortran/trans-types.c:614) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fortran/trans-types.c:821) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/function.c:1972) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/function.c:2226) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/function.c:2246) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/function.c:382) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/function.c:4945) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fwprop.c:373) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/fwprop.c:694) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gcc.c:10073) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gcc.c:1403) with 4 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gcc.c:3116) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gcc.c:3340) with 4 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gcc.c:3348) with 4 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gcc.c:5591) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gcc.c:5943) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gcc.c:5965) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gcc.c:6211) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gcc.c:6568) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gcc.c:8511) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gcc.c:8587) with 4 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gcc.c:8683) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gcc.c:8734) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gcc.c:8746) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gcc.c:8827) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gcc.c:8847) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gcse.c:1367) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/genattrtab.c:1203) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/genattrtab.c:2663) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/genautomata.c:2573) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/genautomata.c:4586) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/genautomata.c:6853) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/genautomata.c:8861) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/genautomata.c:951) with 8 conditions (8 BBs) transformed into a switch statement. Condition chain (at ../../gcc/genextract.c:289) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/genflags.c:61) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gengenrtl.c:256) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gengtype.c:1107) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gengtype.c:1107) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gengtype.c:2491) with 5 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gengtype.c:2491) with 5 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gengtype.c:3299) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gengtype.c:3299) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gengtype.c:3317) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gengtype.c:3317) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gengtype.h:344) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gengtype.h:344) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gengtype.h:344) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gengtype.h:344) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/genmatch.c:1702) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/genmatch.c:1772) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/genmatch.c:2054) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/genmatch.c:2918) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/genmatch.c:3192) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/genmatch.c:4265) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/genmatch.c:4413) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/genmodes.c:1497) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/genoutput.c:763) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/genpeep.c:250) with 8 conditions (8 BBs) transformed into a switch statement. Condition chain (at ../../gcc/genpreds.c:794) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/genrecog.c:746) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/genrecog.c:751) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at ../../gcc/genrecog.c:760) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gensupport.c:1634) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gensupport.c:1674) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gensupport.c:1975) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gensupport.c:3090) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gensupport.c:3256) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gensupport.c:3260) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gensupport.c:3265) with 8 conditions (8 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gensupport.c:829) with 7 conditions (5 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gimple.c:1627) with 4 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gimple.c:1674) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gimple.c:1796) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gimple.c:388) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gimple-expr.h:87) with 4 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gimple-expr.h:87) with 4 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gimple-expr.h:87) with 4 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gimple-expr.h:87) with 4 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gimple-expr.h:87) with 4 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gimple-expr.h:87) with 4 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gimple-expr.h:96) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gimple-expr.h:96) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gimple-expr.h:96) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gimple-expr.h:96) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gimple-expr.h:96) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gimple-fold.c:318) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gimple-fold.c:367) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gimple-fold.c:4052) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gimple-fold.c:885) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gimple-fold.c:886) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gimple.h:2823) with 4 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gimple.h:2823) with 4 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gimple.h:2823) with 4 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gimple.h:2823) with 4 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gimple.h:2823) with 4 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gimple.h:2823) with 4 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gimple.h:2823) with 4 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gimple.h:2823) with 4 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gimple.h:2823) with 4 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gimple.h:2823) with 4 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gimple.h:2823) with 4 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gimple.h:2823) with 4 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gimple.h:2823) with 4 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gimple.h:2823) with 4 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gimple.h:6549) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gimple.h:6549) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gimple.h:6549) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gimple.h:6549) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gimple.h:6549) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gimple.h:6549) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gimple.h:6549) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gimple.h:6549) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gimple.h:6549) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gimple.h:6549) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gimple.h:6549) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gimple.h:6549) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gimple.h:6549) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gimple.h:6549) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gimple.h:6549) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gimple-loop-interchange.cc:517) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gimple-loop-versioning.cc:1234) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gimple-match-head.c:976) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gimple-pretty-print.c:386) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gimple-pretty-print.c:607) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gimple-pretty-print.c:672) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gimple-ssa-backprop.c:444) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gimple-ssa-evrp-analyze.c:112) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gimple-ssa-evrp-analyze.c:168) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gimple-ssa-isolate-paths.c:238) with 4 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gimple-ssa-isolate-paths.c:480) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gimple-ssa-isolate-paths.c:511) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gimple-ssa-isolate-paths.c:82) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gimple-ssa-split-paths.c:134) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gimple-ssa-sprintf.c:1349) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gimple-ssa-sprintf.c:1391) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gimple-ssa-sprintf.c:2371) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gimple-ssa-sprintf.c:3713) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gimple-ssa-sprintf.c:3746) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gimple-ssa-sprintf.c:955) with 8 conditions (7 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gimple-ssa-store-merging.c:3615) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gimple-ssa-store-merging.c:3645) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gimple-ssa-strength-reduction.c:1535) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gimple-ssa-strength-reduction.c:1536) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gimple-ssa-strength-reduction.c:1759) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gimple-ssa-strength-reduction.c:2137) with 7 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gimple-streamer-in.c:216) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gimple-walk.c:710) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gimplify.c:10164) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gimplify.c:12783) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gimplify.c:12918) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gimplify.c:14479) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gimplify.c:2665) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gimplify.c:3597) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gimplify.c:4129) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gimplify.c:6456) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gimplify.c:869) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gimplify.c:8829) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gimplify.c:8837) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gimplify.c:9133) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/gimplify.c:9253) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/godump.c:1196) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/godump.c:1209) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/godump.c:1307) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/godump.c:140) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/godump.c:826) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/godump.c:847) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/godump.c:975) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/hsa-brig.c:559) with 6 conditions (6 BBs) transformed into a switch statement. Condition chain (at ../../gcc/hsa-brig.c:965) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/hsa-common.h:958) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/hsa-common.h:958) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/hsa-dump.c:807) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/hsa-gen.c:1905) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/hsa-gen.c:3066) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/hsa-gen.c:3106) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/hsa-gen.c:3622) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/hsa-gen.c:3798) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/hsa-gen.c:924) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/ifcvt.c:1700) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/ifcvt.c:237) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/internal-fn.c:3603) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/internal-fn.c:529) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/internal-fn.c:555) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/ipa-cp.c:1372) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/ipa-cp.c:1987) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/ipa-devirt.c:1241) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/ipa-devirt.c:396) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/ipa-fnsummary.c:1158) with 4 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/ipa-fnsummary.c:1237) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/ipa-fnsummary.c:2337) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/ipa-icf-gimple.c:150) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/ipa-param-manipulation.c:1389) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/ipa-param-manipulation.c:1537) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/ipa-prop.c:1700) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/ipa-prop.c:2191) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/ipa-prop.c:2273) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/ipa-prop.c:315) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/ipa-prop.c:5548) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/ipa-prop.c:5663) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/ipa-split.c:374) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/ipa-split.c:668) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/ipa-sra.c:1651) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/ipa-sra.c:816) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/ipa-utils.c:367) with 4 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/ira-build.c:1839) with 8 conditions (6 BBs) transformed into a switch statement. Condition chain (at ../../gcc/ira.c:1939) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/ira-costs.c:1154) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/is-a.h:224) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/is-a.h:224) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/is-a.h:224) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/is-a.h:224) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/is-a.h:224) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/is-a.h:224) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/is-a.h:224) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/is-a.h:224) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/is-a.h:224) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/is-a.h:224) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/is-a.h:224) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/is-a.h:224) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/is-a.h:224) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/is-a.h:224) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/is-a.h:224) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/is-a.h:224) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at ../../gcc/is-a.h:224) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at ../../gcc/is-a.h:224) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at ../../gcc/is-a.h:224) with 6 conditions (6 BBs) transformed into a switch statement. Condition chain (at ../../gcc/jump.c:709) with 5 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/jump.c:720) with 4 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/jump.c:730) with 4 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/jump.c:756) with 4 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/jump.c:899) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/jump.c:901) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/loop-invariant.c:329) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at ../../gcc/loop-invariant.c:397) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at ../../gcc/loop-iv.c:1139) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/lower-subreg.c:1258) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/lower-subreg.c:495) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/lower-subreg.c:680) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/lra.c:2272) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/lra-constraints.c:1790) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/lra-constraints.c:4104) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/lra-constraints.c:4212) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/lra-eliminations.c:759) with 4 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/lra-remat.c:265) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/lto-cgraph.c:1505) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/lto-cgraph.c:1758) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/lto/lto.c:491) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/lto/lto-common.c:1172) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/lto/lto-common.c:1403) with 4 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/lto/lto-common.c:1655) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/lto/lto-common.c:302) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/lto/lto-lang.c:978) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/lto/lto-symtab.c:1007) with 4 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/lto/lto-symtab.c:445) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/lto/lto-symtab.c:464) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/lto-streamer-in.c:1456) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/lto-streamer-in.c:1492) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at ../../gcc/lto-streamer-out.c:1075) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/lto-streamer-out.c:1728) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/lto-wrapper.c:424) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/mcf.c:151) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/mode-switching.c:350) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/omp-expand.c:1823) with 4 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/omp-expand.c:1915) with 4 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/omp-expand.c:2761) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/omp-expand.c:2778) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/omp-expand.c:5631) with 4 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/omp-expand.c:6108) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/omp-expand.c:6534) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/omp-expand.c:8900) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/omp-grid.c:620) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/omp-low.c:12923) with 6 conditions (6 BBs) transformed into a switch statement. Condition chain (at ../../gcc/omp-low.c:1708) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/omp-low.c:2832) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/omp-low.c:2865) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/omp-low.c:2913) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/omp-low.c:415) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/omp-low.c:621) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/omp-low.c:8624) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/omp-low.c:9515) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/omp-simd-clone.c:1478) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/omp-simd-clone.c:1523) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/omp-simd-clone.c:843) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/optabs.c:1098) with 7 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/optabs.c:1109) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/optabs.c:1339) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/optabs.c:1444) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/optabs.c:2783) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/optabs.c:3098) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/optabs.c:6182) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/optabs.c:7299) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/optabs.c:7308) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/optabs-libfuncs.c:307) with 8 conditions (5 BBs) transformed into a switch statement. Condition chain (at ../../gcc/optabs-libfuncs.c:322) with 4 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/optabs-libfuncs.c:335) with 8 conditions (5 BBs) transformed into a switch statement. Condition chain (at ../../gcc/optabs-libfuncs.c:348) with 4 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/optabs-libfuncs.c:361) with 4 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/optabs-query.c:572) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at ../../gcc/optabs-query.c:704) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at ../../gcc/optabs-query.h:89) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/optabs-query.h:89) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/opt-problem.cc:275) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/opts.c:168) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/opts-common.c:1361) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/opts-common.c:1685) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/opts-common.c:384) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/postreload.c:1421) with 6 conditions (5 BBs) transformed into a switch statement. Condition chain (at ../../gcc/postreload.c:2145) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/postreload.c:2148) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/postreload.c:497) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/predict.c:1616) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/predict.c:2341) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/predict.c:2373) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/predict.c:2933) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/predict.c:4226) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/print-rtl.c:1807) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/print-rtl.c:511) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at ../../gcc/print-tree.c:689) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/profile-count.c:159) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/read-md.c:272) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/read-md.c:272) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/read-md.c:467) with 6 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/read-md.c:467) with 6 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/read-md.c:605) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/read-md.c:605) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/read-md.c:636) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/read-md.c:636) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/read-rtl.c:1879) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/read-rtl.c:1889) with 4 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/read-rtl-function.c:1400) with 10 conditions (10 BBs) transformed into a switch statement. Condition chain (at ../../gcc/real.c:5019) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/real.c:5052) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/recog.c:1870) with 4 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/recog.c:2043) with 4 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/ree.c:1168) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/regcprop.c:554) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/reginfo.c:1065) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/reginfo.c:368) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/regrename.c:1311) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/reg-stack.c:1567) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/reload1.c:1221) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/reload1.c:1359) with 4 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/reload1.c:1449) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/reload1.c:1574) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/reload1.c:3020) with 4 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/reload1.c:5565) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/reload1.c:5625) with 4 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/reload1.c:6616) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/reload1.c:8460) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/reload1.c:8523) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/reload1.c:8775) with 4 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/reload.c:1228) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/reload.c:2133) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/reload.c:2863) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/reload.c:3100) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/reload.c:328) with 4 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/reload.c:4290) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/reload.c:4299) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/reload.c:4339) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/reload.c:4659) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/reload.c:5550) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/reload.c:6536) with 6 conditions (5 BBs) transformed into a switch statement. Condition chain (at ../../gcc/reload.c:6937) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/reload.c:7094) with 4 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/resource.c:1010) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/resource.c:1044) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/resource.c:286) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/resource.c:459) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/resource.c:464) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/rtlanal.c:149) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/rtlanal.c:149) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/rtlanal.c:149) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/rtlanal.c:1726) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/rtlanal.c:1915) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/rtlanal.c:2150) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/rtlanal.c:3524) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at ../../gcc/rtlanal.c:5935) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/rtlanal.c:5953) with 4 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/rtlanal.c:6242) with 5 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/rtlanal.c:6253) with 4 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/rtlanal.c:6270) with 4 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/rtl.h:883) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/rtl.h:883) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/rtl.h:883) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/rtl.h:883) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/rtl.h:883) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/rtl.h:883) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/rtl.h:883) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/rtl.h:883) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/rtl.h:883) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/rtl.h:883) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/rtl.h:883) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/rtl.h:883) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/rtl.h:883) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/rtl.h:883) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/rtl.h:883) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/rtl.h:883) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/rtl.h:883) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/rtl.h:883) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/rtl.h:883) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/rtl.h:883) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/rtl.h:883) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/rtl.h:883) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/rtl.h:883) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/rtl.h:883) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/rtl.h:883) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/rtl.h:883) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/rtl.h:883) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/rtl.h:883) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/rtl.h:883) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/rtl.h:883) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/rtl.h:883) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/rtl.h:883) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/rtl.h:883) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/rtl.h:883) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/rtl.h:883) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/rtl.h:883) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/rtl.h:883) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/rtl.h:883) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/rtl.h:883) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/rtl.h:883) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/rtl.h:883) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/rtl.h:883) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/rtl.h:883) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/rtl.h:883) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/rtl.h:883) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/rtl.h:883) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/rtl.h:883) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/rtl.h:883) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/rtl.h:883) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/rtl.h:883) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/rtl.h:883) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/rtl.h:883) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/rtl.h:883) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/rtl.h:883) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/rtl.h:883) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/rtl.h:883) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/rtl.h:883) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/rtl.h:883) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/rtl.h:883) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/rtl.h:883) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/rtl.h:883) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/rtl.h:883) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/rtl.h:883) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/rtl.h:883) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/rtl.h:883) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/rtl.h:883) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/rtl.h:883) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/rtl.h:883) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/rtl.h:883) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/rtl.h:883) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/rtl.h:883) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/rtl.h:883) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/rtl.h:883) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/rtl.h:883) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/rtl.h:883) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/rtl.h:883) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/rtl.h:883) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/rtl.h:883) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/rtl.h:883) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/rtl.h:883) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/rtl.h:883) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/rtl.h:883) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/rtl.h:883) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/rtl.h:883) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/rtl.h:883) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/rtl.h:883) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/rtl.h:883) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/rtl.h:883) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/rtl.h:883) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/rtl.h:883) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/rtl.h:883) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/rtl.h:883) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/rtl.h:883) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/rtl.h:883) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/rtl.h:883) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/rtl.h:883) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/rtl.h:883) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/rtl.h:883) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/rtl.h:883) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/rtl.h:883) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/rtl.h:883) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/rtl.h:883) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/rtl.h:883) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/rtl.h:883) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/rtl.h:883) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/rtl.h:883) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/rtl.h:895) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/rtl.h:895) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/rtl.h:895) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/rtl.h:895) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/sanopt.c:516) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/sched-deps.c:2943) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/sched-deps.c:4584) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/sched-rgn.c:1801) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/sched-rgn.c:1826) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/sel-sched.c:2456) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/simplify-rtx.c:1271) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/simplify-rtx.c:1313) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/simplify-rtx.c:1684) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/simplify-rtx.c:1748) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at ../../gcc/simplify-rtx.c:2234) with 4 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/simplify-rtx.c:2271) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/simplify-rtx.c:2373) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/simplify-rtx.c:2387) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/simplify-rtx.c:2666) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/simplify-rtx.c:2863) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/simplify-rtx.c:3026) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/simplify-rtx.c:3260) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/simplify-rtx.c:4082) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at ../../gcc/simplify-rtx.c:4088) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at ../../gcc/simplify-rtx.c:4209) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at ../../gcc/simplify-rtx.c:4255) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at ../../gcc/simplify-rtx.c:5022) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/simplify-rtx.c:5464) with 6 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/simplify-rtx.c:5542) with 4 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/simplify-rtx.c:5657) with 4 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/simplify-rtx.c:5796) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/simplify-rtx.c:5805) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/simplify-rtx.c:5807) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/simplify-rtx.c:5828) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/simplify-rtx.c:5830) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/simplify-rtx.c:5832) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/simplify-rtx.c:5958) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at ../../gcc/simplify-rtx.c:6468) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at ../../gcc/simplify-rtx.c:6753) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at ../../gcc/simplify-rtx.c:6771) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at ../../gcc/simplify-rtx.c:7222) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/simplify-rtx.c:7592) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/stor-layout.c:1214) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/stor-layout.c:439) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/stor-layout.c:466) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/targhooks.c:1320) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/targhooks.c:416) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/toplev.c:1576) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/toplev.c:2186) with 4 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/trans-mem.c:1419) with 5 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/trans-mem.c:375) with 10 conditions (5 BBs) transformed into a switch statement. Condition chain (at ../../gcc/trans-mem.c:421) with 10 conditions (5 BBs) transformed into a switch statement. Condition chain (at ../../gcc/trans-mem.c:588) with 4 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree.c:10008) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree.c:10031) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree.c:10045) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree.c:10788) with 6 conditions (6 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree.c:10901) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree.c:11174) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree.c:11647) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree.c:1168) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree.c:13450) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree.c:13781) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree.c:13921) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree.c:14695) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree.c:14720) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree.c:4278) with 5 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree.c:4291) with 5 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree.c:4483) with 8 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree.c:5082) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree.c:5733) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree.c:5794) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree.c:7064) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree.c:7443) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree.c:7445) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree.c:9963) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree.c:9994) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-cfg.c:3067) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-cfg.c:3212) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-cfg.c:3683) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-cfg.c:3687) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-cfg.c:5107) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-cfg.c:5235) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-cfg.c:6746) with 4 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-cfgcleanup.c:249) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-chrec.c:948) with 8 conditions (7 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-data-ref.c:5536) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-data-ref.c:713) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-dump.c:334) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-dump.c:517) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-eh.c:2763) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree.h:4907) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree.h:4907) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree.h:4907) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree.h:4907) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree.h:4948) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree.h:4948) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree.h:5108) with 5 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree.h:5108) with 5 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree.h:5108) with 5 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree.h:5108) with 5 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree.h:5108) with 5 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree.h:5108) with 5 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree.h:5108) with 5 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree.h:5293) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-if-conv.c:1465) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-if-conv.c:956) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-inline.c:1072) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-inline.c:1083) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-inline.c:1268) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-inline.c:1272) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-inline.c:1750) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-inline.c:5411) with 4 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-inline.c:5427) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-inline.c:5548) with 6 conditions (5 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-nested.c:1001) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-nested.c:1732) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-nested.c:270) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-nested.c:2982) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-object-size.c:264) with 6 conditions (6 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-pretty-print.c:2252) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-scalar-evolution.c:3586) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-sra.c:1093) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-sra.c:1291) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-ssa-address.c:1058) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-ssa-alias.c:1625) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-ssa-alias.c:1642) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-ssa-alias.c:2095) with 4 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-ssa-alias.c:2610) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-ssa-alias.c:3033) with 4 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-ssa-alias.c:3034) with 4 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-ssa-alias.c:371) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-ssa-alias.c:383) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-ssa.c:1002) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-ssa.c:1259) with 4 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-ssa.c:1527) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-ssa-ccp.c:1790) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-ssa-ccp.c:2647) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-ssa-ccp.c:278) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-ssa-ccp.c:2955) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-ssa-dce.c:822) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-ssa-dce.c:884) with 13 conditions (13 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-ssa-dom.c:1924) with 4 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-ssa-dse.c:997) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-ssa-forwprop.c:1211) with 4 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-ssa-forwprop.c:1565) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-ssa-forwprop.c:1566) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-ssa-forwprop.c:1635) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-ssa-forwprop.c:1664) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-ssa-forwprop.c:1693) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-ssa-forwprop.c:1709) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-ssa-forwprop.c:1739) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-ssa-forwprop.c:1920) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-ssa-forwprop.c:2363) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-ssa-forwprop.c:2735) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-ssa-forwprop.c:554) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-ssa-forwprop.c:703) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-ssa-live.c:352) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-ssa-loop-ch.c:458) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-ssa-loop-im.c:1174) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-ssa-loop-im.c:1255) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-ssa-loop-ivopts.c:3314) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-ssa-loop-ivopts.c:3958) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-ssa-loop-ivopts.c:4297) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-ssa-loop-ivopts.c:829) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-ssa-loop-manip.c:1024) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-ssa-loop-niter.c:2115) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-ssa-loop-niter.c:3534) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-ssa-loop-niter.c:3552) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-ssa-loop-niter.c:4651) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-ssa-math-opts.c:925) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-ssa-math-opts.c:942) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-ssa-math-opts.c:953) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-ssanames.c:557) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-ssa-operands.c:870) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-ssa-phiopt.c:1326) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-ssa-phiopt.c:1908) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-ssa-phiopt.c:1935) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-ssa-phiopt.c:486) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-ssa-pre.c:3127) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-ssa-propagate.c:1327) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-ssa-propagate.c:1436) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-ssa-reassoc.c:1983) with 4 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-ssa-reassoc.c:3482) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-ssa-reassoc.c:4443) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-ssa-reassoc.c:482) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-ssa-reassoc.c:5582) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-ssa-reassoc.c:948) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-ssa-sccvn.c:4290) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-ssa-sccvn.c:4297) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-ssa-sccvn.c:4326) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-ssa-sccvn.c:5376) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-ssa-sccvn.c:5471) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-ssa-sccvn.c:5562) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-ssa-sccvn.c:6620) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-ssa-sccvn.c:968) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-ssa-scopedtables.c:1123) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-ssa-scopedtables.c:1138) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-ssa-scopedtables.c:1145) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-ssa-scopedtables.c:402) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-ssa-scopedtables.c:594) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-ssa-structalias.c:3433) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-ssa-structalias.c:4420) with 6 conditions (6 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-ssa-structalias.c:6526) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-ssa-structalias.c:6617) with 6 conditions (6 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-ssa-threadbackward.c:751) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-ssa-threadbackward.c:84) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-ssa-threadedge.c:1096) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-ssa-threadedge.c:445) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-ssa-threadedge.c:504) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-streamer-in.c:151) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-streamer-in.c:245) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-streamer-out.c:122) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-streamer-out.c:207) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-tailcall.c:305) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-tailcall.c:332) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-tailcall.c:443) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-tailcall.c:648) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-vect-data-refs.c:135) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-vect-data-refs.c:4138) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-vect-data-refs.c:4762) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-vect-data-refs.c:5092) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-vect-data-refs.c:5716) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-vect-generic.c:1053) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-vect-generic.c:1060) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-vect-generic.c:1540) with 4 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-vect-generic.c:1581) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-vect-generic.c:1713) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-vect-generic.c:1795) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-vect-generic.c:1961) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-vect-generic.c:365) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-vect-loop.c:2528) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-vect-loop.c:3873) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-vect-patterns.c:2087) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-vect-patterns.c:2221) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-vect-patterns.c:3940) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-vect-patterns.c:4060) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-vect-slp.c:3315) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-vect-slp.c:3594) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-vect-slp.c:3603) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-vect-stmts.c:11299) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-vect-stmts.c:11645) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-vect-stmts.c:12041) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-vect-stmts.c:1607) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-vect-stmts.c:5309) with 4 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-vect-stmts.c:5365) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-vect-stmts.c:5399) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-vect-stmts.c:6046) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-vect-stmts.c:6508) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-vect-stmts.c:6517) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-vect-stmts.c:6518) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-vect-stmts.c:9810) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-vect-stmts.c:9825) with 4 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-vect-stmts.c:9836) with 4 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-vrp.c:1655) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-vrp.c:1728) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-vrp.c:1730) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-vrp.c:1882) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-vrp.c:1897) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-vrp.c:2008) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-vrp.c:2044) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-vrp.c:2121) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-vrp.c:2144) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-vrp.c:2158) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-vrp.c:2428) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-vrp.c:4059) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-vrp.c:430) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-vrp.c:4338) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-vrp.c:4349) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/tree-vrp.c:549) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/ubsan.c:1377) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/ubsan.c:1449) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/ubsan.c:2159) with 4 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/valtrack.c:129) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/value-range.cc:280) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/varasm.c:2418) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/varasm.c:6648) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/varasm.c:7093) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/varasm.c:7108) with 4 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/var-tracking.c:5277) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/var-tracking.c:5471) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/var-tracking.c:5509) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/var-tracking.c:6282) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/var-tracking.c:6433) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/var-tracking.c:7645) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/var-tracking.c:7649) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/var-tracking.c:798) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/var-tracking.c:9588) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/var-tracking.c:9847) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/vr-values.c:123) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/vr-values.c:1642) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/vr-values.c:1864) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/vr-values.c:2038) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/vr-values.c:213) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/vr-values.c:2236) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../gcc/vr-values.c:3085) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/vr-values.c:3567) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/vr-values.c:4225) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/vr-values.c:4277) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/vr-values.c:4291) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/vr-values.c:4298) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/vr-values.c:4307) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/vr-values.c:4313) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/vr-values.c:4319) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/vr-values.c:548) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../gcc/vr-values.c:797) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../gcc/vtable-verify.c:581) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at generic-match.c:10176) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at generic-match.c:10341) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at generic-match.c:10872) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at generic-match.c:10872) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at generic-match.c:10950) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at generic-match.c:11033) with 6 conditions (6 BBs) transformed into a switch statement. Condition chain (at generic-match.c:11651) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at generic-match.c:12575) with 6 conditions (6 BBs) transformed into a switch statement. Condition chain (at generic-match.c:12830) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at generic-match.c:12995) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at generic-match.c:12995) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at generic-match.c:1300) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at generic-match.c:1300) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at generic-match.c:13532) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at generic-match.c:13619) with 6 conditions (6 BBs) transformed into a switch statement. Condition chain (at generic-match.c:13633) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at generic-match.c:13700) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at generic-match.c:14286) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at generic-match.c:14665) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at generic-match.c:14729) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at generic-match.c:15755) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at generic-match.c:163) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at generic-match.c:16450) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at generic-match.c:16742) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at generic-match.c:16762) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at generic-match.c:16762) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at generic-match.c:179) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at generic-match.c:2086) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at generic-match.c:2132) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at generic-match.c:21498) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at generic-match.c:21520) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at generic-match.c:21542) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at generic-match.c:2155) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at generic-match.c:21564) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at generic-match.c:21602) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at generic-match.c:21624) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at generic-match.c:2167) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at generic-match.c:2227) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at generic-match.c:2446) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at generic-match.c:3361) with 6 conditions (6 BBs) transformed into a switch statement. Condition chain (at generic-match.c:3375) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at generic-match.c:3444) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at generic-match.c:4142) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at generic-match.c:4261) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at generic-match.c:4350) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at generic-match.c:4382) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at generic-match.c:4409) with 4 conditions (3 BBs) transformed into a switch statement. Condition chain (at generic-match.c:46003) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at generic-match.c:46025) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at generic-match.c:46047) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at generic-match.c:46069) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at generic-match.c:46107) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at generic-match.c:46129) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at generic-match.c:48643) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at generic-match.c:48665) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at generic-match.c:48687) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at generic-match.c:48709) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at generic-match.c:48747) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at generic-match.c:48769) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at generic-match.c:4914) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at generic-match.c:4956) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at generic-match.c:5261) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at generic-match.c:5657) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at generic-match.c:5657) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at generic-match.c:569) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at generic-match.c:57046) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at generic-match.c:57331) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at generic-match.c:5827) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at generic-match.c:5876) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at generic-match.c:5899) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at generic-match.c:5911) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at generic-match.c:5998) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at generic-match.c:6339) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at generic-match.c:6443) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at generic-match.c:6443) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at generic-match.c:64585) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at generic-match.c:64768) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at generic-match.c:6540) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at generic-match.c:6608) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at generic-match.c:7051) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at generic-match.c:7101) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at generic-match.c:7140) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at generic-match.c:7465) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at generic-match.c:7757) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at generic-match.c:7757) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at generic-match.c:7986) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at generic-match.c:8616) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at generic-match.c:8616) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at generic-match.c:8690) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at generic-match.c:8905) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at generic-match.c:8905) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at generic-match.c:9003) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at generic-match.c:9261) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at gimple-match.c:10029) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at gimple-match.c:10314) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at gimple-match.c:111641) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at gimple-match.c:111814) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at gimple-match.c:11311) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at gimple-match.c:11463) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at gimple-match.c:12025) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at gimple-match.c:12104) with 6 conditions (6 BBs) transformed into a switch statement. Condition chain (at gimple-match.c:12630) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at gimple-match.c:12820) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at gimple-match.c:13840) with 6 conditions (6 BBs) transformed into a switch statement. Condition chain (at gimple-match.c:14091) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at gimple-match.c:14242) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at gimple-match.c:14242) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at gimple-match.c:14872) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at gimple-match.c:14872) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at gimple-match.c:14940) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at gimple-match.c:15025) with 6 conditions (6 BBs) transformed into a switch statement. Condition chain (at gimple-match.c:15039) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at gimple-match.c:15100) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at gimple-match.c:15925) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at gimple-match.c:16011) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at gimple-match.c:1636) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at gimple-match.c:1636) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at gimple-match.c:16429) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at gimple-match.c:16510) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at gimple-match.c:165) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at gimple-match.c:19245) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at gimple-match.c:20058) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at gimple-match.c:20516) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at gimple-match.c:20543) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at gimple-match.c:20543) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at gimple-match.c:217) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at gimple-match.c:2488) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at gimple-match.c:2537) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at gimple-match.c:2565) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at gimple-match.c:2577) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at gimple-match.c:2632) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at gimple-match.c:2698) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at gimple-match.c:2952) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at gimple-match.c:3993) with 6 conditions (6 BBs) transformed into a switch statement. Condition chain (at gimple-match.c:4007) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at gimple-match.c:4068) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at gimple-match.c:40946) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at gimple-match.c:40965) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at gimple-match.c:40984) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at gimple-match.c:41003) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at gimple-match.c:41052) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at gimple-match.c:41071) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at gimple-match.c:4748) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at gimple-match.c:4885) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at gimple-match.c:5051) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at gimple-match.c:5189) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at gimple-match.c:5230) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at gimple-match.c:5552) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at gimple-match.c:5836) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at gimple-match.c:5836) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at gimple-match.c:6061) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at gimple-match.c:6110) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at gimple-match.c:6138) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at gimple-match.c:6150) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at gimple-match.c:6230) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at gimple-match.c:6765) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at gimple-match.c:6925) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at gimple-match.c:6925) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at gimple-match.c:695) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at gimple-match.c:7065) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at gimple-match.c:7117) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at gimple-match.c:7385) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at gimple-match.c:74680) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at gimple-match.c:7468) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at gimple-match.c:74699) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at gimple-match.c:74718) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at gimple-match.c:74737) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at gimple-match.c:74786) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at gimple-match.c:74805) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at gimple-match.c:7505) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at gimple-match.c:78233) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at gimple-match.c:78252) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at gimple-match.c:78271) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at gimple-match.c:78290) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at gimple-match.c:78339) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at gimple-match.c:78358) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at gimple-match.c:7878) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at gimple-match.c:8204) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at gimple-match.c:8204) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at gimple-match.c:8484) with 4 conditions (3 BBs) transformed into a switch statement. Condition chain (at gimple-match.c:85573) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at gimple-match.c:86008) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at gimple-match.c:92316) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at gimple-match.c:92705) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at gimple-match.c:92857) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at gimple-match.c:92977) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at gimple-match.c:93097) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at gimple-match.c:93217) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at gimple-match.c:93337) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at gimple-match.c:93457) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at gimple-match.c:93577) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at gimple-match.c:93697) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at gimple-match.c:93817) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at gimple-match.c:93937) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at gimple-match.c:94057) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at gimple-match.c:94177) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at gimple-match.c:94297) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at gimple-match.c:94417) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at gimple-match.c:94537) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at gimple-match.c:94657) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at gimple-match.c:94777) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at gimple-match.c:94897) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at gimple-match.c:95017) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at gimple-match.c:95137) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at gimple-match.c:95257) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at gimple-match.c:95377) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at gimple-match.c:9546) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at gimple-match.c:9546) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at gimple-match.c:9621) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at gimple-match.c:9907) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at gimple-match.c:9907) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at gtype-desc.c:328) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at gtype-desc.c:3931) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at insn-attrtab.c:82) with 22 conditions (22 BBs) transformed into a switch statement. Condition chain (at insn-dfatab.c:2693) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at insn-dfatab.c:2807) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at insn-dfatab.c:3179) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at insn-dfatab.c:3206) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at insn-dfatab.c:597) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at insn-dfatab.c:666) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../../libcpp/charset.c:1639) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../libcpp/charset.c:1639) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../../libcpp/expr.c:1782) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../libcpp/expr.c:1782) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../../libcpp/expr.c:373) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at ../../libcpp/expr.c:373) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at ../../../libcpp/expr.c:393) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at ../../libcpp/expr.c:393) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at ../../../libcpp/expr.c:413) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at ../../libcpp/expr.c:413) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at ../../../libcpp/expr.c:433) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at ../../libcpp/expr.c:433) with 5 conditions (5 BBs) transformed into a switch statement. Condition chain (at ../../../libcpp/lex.c:1993) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../libcpp/lex.c:1993) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../../libcpp/lex.c:2254) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../libcpp/lex.c:2254) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../../libcpp/lex.c:2468) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../libcpp/lex.c:2468) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../../libcpp/lex.c:2482) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../libcpp/lex.c:2482) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../../libcpp/lex.c:3082) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../libcpp/lex.c:3082) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../../libcpp/lex.c:3477) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../libcpp/lex.c:3477) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../../libcpp/lex.c:3800) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../libcpp/lex.c:3800) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../../libcpp/macro.c:1062) with 6 conditions (6 BBs) transformed into a switch statement. Condition chain (at ../../libcpp/macro.c:1062) with 6 conditions (6 BBs) transformed into a switch statement. Condition chain (at ../../../libcpp/macro.c:1547) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../libcpp/macro.c:1547) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../../libcpp/macro.c:2605) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../libcpp/macro.c:2605) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../../libcpp/macro.c:2627) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../libcpp/macro.c:2627) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../../libcpp/macro.c:2964) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../libcpp/macro.c:2964) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../../libcpp/macro.c:702) with 11 conditions (10 BBs) transformed into a switch statement. Condition chain (at ../../libcpp/macro.c:702) with 11 conditions (10 BBs) transformed into a switch statement. Condition chain (at ../../../libcpp/traditional.c:487) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../libcpp/traditional.c:487) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../../libcpp/traditional.c:732) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../libcpp/traditional.c:732) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../libdecnumber/decContext.c:357) with 14 conditions (14 BBs) transformed into a switch statement. Condition chain (at ../../libdecnumber/decNumber.c:2472) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../libdecnumber/decNumber.c:2630) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../libdecnumber/decNumber.c:2685) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../libdecnumber/decNumber.c:3322) with 10 conditions (10 BBs) transformed into a switch statement. Condition chain (at ../../libdecnumber/decNumber.c:6089) with 4 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../libiberty/argv.c:315) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../libiberty/argv.c:315) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../libiberty/cp-demangle.c:1771) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../libiberty/cp-demangle.c:1771) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../libiberty/cp-demangle.c:2306) with 4 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../libiberty/cp-demangle.c:2306) with 4 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../libiberty/cp-demangle.c:2741) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../libiberty/cp-demangle.c:2741) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../libiberty/cp-demangle.c:2914) with 5 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../libiberty/cp-demangle.c:2914) with 5 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../libiberty/cp-demangle.c:3274) with 4 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../libiberty/cp-demangle.c:3274) with 4 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../libiberty/cp-demangle.c:3295) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../libiberty/cp-demangle.c:3295) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../libiberty/d-demangle.c:939) with 4 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../libiberty/d-demangle.c:939) with 4 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../libiberty/rust-demangle.c:197) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ../../libiberty/rust-demangle.c:197) with 4 conditions (4 BBs) transformed into a switch statement. Condition chain (at ./tm-preds.h:304) with 3 conditions (3 BBs) transformed into a switch statement. Condition chain (at ../../zlib/deflate.c:1008) with 3 conditions (2 BBs) transformed into a switch statement. Condition chain (at ../../zlib/gzread.c:195) with 4 conditions (3 BBs) transformed into a switch statement. [-- Attachment #3: 0001-Add-if-chain-to-switch-conversion-pass.patch --] [-- Type: text/x-patch, Size: 34905 bytes --] From c49614211ad8f685dba64cdd086c6504f1ea1f63 Mon Sep 17 00:00:00 2001 From: Martin Liska <mliska@suse.cz> Date: Wed, 25 Sep 2019 15:26:44 +0200 Subject: [PATCH] Add if-chain to switch conversion pass. gcc/ChangeLog: 2019-11-15 Martin Liska <mliska@suse.cz> PR tree-optimization/14799 PR ipa/88702 * Makefile.in: Add gimple-if-to-switch.o. * common.opt: Add -fconvert-if-to-switch. * dbgcnt.def (DEBUG_COUNTER): Define if_to_switch. * doc/invoke.texi: Document the newly added option. * gimple-if-to-switch.c: New file. * opts.c: Enable OPT_fconvert_if_to_switch with -O2+. * passes.def: Add pass_if_to_switch to pass manager. * timevar.def (TV_TREE_IF_TO_SWITCH): Add TV_TREE_IF_TO_SWITCH time variable. * tree-pass.h (make_pass_if_to_switch): New. gcc/testsuite/ChangeLog: 2019-11-15 Martin Liska <mliska@suse.cz> PR tree-optimization/14799 PR ipa/88702 * gcc.dg/tree-ssa/if-to-switch-1.c: New test. * gcc.dg/tree-ssa/if-to-switch-2.c: New test. * gcc.dg/tree-ssa/if-to-switch-3.c: New test. * gcc.dg/tree-ssa/if-to-switch-4.c: New test. * gcc.dg/tree-ssa/if-to-switch-5.c: New test. * gcc.dg/tree-ssa/if-to-switch-6.c: New test. * gcc.dg/tree-ssa/if-to-switch-7.c: New test. * gcc.dg/tree-ssa/if-to-switch-8.c: New test. * gcc.dg/tree-ssa/reassoc-32.c: Do not allow if-to-switch convertion. * gcc.dg/tree-ssa/reassoc-33.c: Likewise. --- gcc/Makefile.in | 1 + gcc/common.opt | 4 + gcc/dbgcnt.def | 1 + gcc/doc/invoke.texi | 12 +- gcc/gimple-if-to-switch.c | 661 ++++++++++++++++++ gcc/opts.c | 1 + gcc/passes.def | 1 + .../gcc.dg/tree-ssa/if-to-switch-1.c | 35 + .../gcc.dg/tree-ssa/if-to-switch-2.c | 11 + .../gcc.dg/tree-ssa/if-to-switch-3.c | 11 + .../gcc.dg/tree-ssa/if-to-switch-4.c | 36 + .../gcc.dg/tree-ssa/if-to-switch-5.c | 12 + .../gcc.dg/tree-ssa/if-to-switch-6.c | 42 ++ .../gcc.dg/tree-ssa/if-to-switch-7.c | 25 + .../gcc.dg/tree-ssa/if-to-switch-8.c | 27 + gcc/testsuite/gcc.dg/tree-ssa/reassoc-32.c | 2 +- gcc/testsuite/gcc.dg/tree-ssa/reassoc-33.c | 2 +- gcc/timevar.def | 1 + gcc/tree-pass.h | 1 + 19 files changed, 882 insertions(+), 4 deletions(-) create mode 100644 gcc/gimple-if-to-switch.c create mode 100644 gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-1.c create mode 100644 gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-2.c create mode 100644 gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-3.c create mode 100644 gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-4.c create mode 100644 gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-5.c create mode 100644 gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-6.c create mode 100644 gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-7.c create mode 100644 gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-8.c diff --git a/gcc/Makefile.in b/gcc/Makefile.in index 7d3c13230e4..0f131c315c8 100644 --- a/gcc/Makefile.in +++ b/gcc/Makefile.in @@ -1317,6 +1317,7 @@ OBJS = \ gimple.o \ gimple-builder.o \ gimple-expr.o \ + gimple-if-to-switch.o \ gimple-iterator.o \ gimple-fold.o \ gimple-laddress.o \ diff --git a/gcc/common.opt b/gcc/common.opt index e7b87820bc9..7622c5e2e96 100644 --- a/gcc/common.opt +++ b/gcc/common.opt @@ -1154,6 +1154,10 @@ fconserve-stack Common Var(flag_conserve_stack) Optimization Do not perform optimizations increasing noticeably stack usage. +fconvert-if-to-switch +Common Report Var(flag_convert_if_to_switch) Optimization +Perform conversions of if-elseif chain into a switch statement. + fcprop-registers Common Report Var(flag_cprop_registers) Optimization Perform a register copy-propagation optimization pass. diff --git a/gcc/dbgcnt.def b/gcc/dbgcnt.def index 5b96a7eaf9d..dfbb15773f9 100644 --- a/gcc/dbgcnt.def +++ b/gcc/dbgcnt.def @@ -170,6 +170,7 @@ DEBUG_COUNTER (if_after_combine) DEBUG_COUNTER (if_after_reload) DEBUG_COUNTER (if_conversion) DEBUG_COUNTER (if_conversion_tree) +DEBUG_COUNTER (if_to_switch) DEBUG_COUNTER (ipa_sra_params) DEBUG_COUNTER (ipa_sra_retvalues) DEBUG_COUNTER (ira_move) diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi index fe79ca2247a..42a52fd97d8 100644 --- a/gcc/doc/invoke.texi +++ b/gcc/doc/invoke.texi @@ -411,7 +411,7 @@ Objective-C and Objective-C++ Dialects}. -fassociative-math -fauto-profile -fauto-profile[=@var{path}] @gol -fauto-inc-dec -fbranch-probabilities @gol -fcaller-saves @gol --fcombine-stack-adjustments -fconserve-stack @gol +-fcombine-stack-adjustments -fconserve-stack -fconvert-if-to-switch @gol -fcompare-elim -fcprop-registers -fcrossjumping @gol -fcse-follow-jumps -fcse-skip-blocks -fcx-fortran-rules @gol -fcx-limited-range @gol @@ -478,7 +478,7 @@ Objective-C and Objective-C++ Dialects}. -fthread-jumps -ftracer -ftree-bit-ccp @gol -ftree-builtin-call-dce -ftree-ccp -ftree-ch @gol -ftree-coalesce-vars -ftree-copy-prop -ftree-dce -ftree-dominator-opts @gol --ftree-dse -ftree-forwprop -ftree-fre -fcode-hoisting @gol +-ftree-dse -ftree-forwprop -ftree-fre -fcode-hoisting @gol -ftree-loop-if-convert -ftree-loop-im @gol -ftree-phiprop -ftree-loop-distribution -ftree-loop-distribute-patterns @gol -ftree-loop-ivcanon -ftree-loop-linear -ftree-loop-optimize @gol @@ -2271,6 +2271,13 @@ Allow conditional expressions with mismatched types in the second and third arguments. The value of such an expression is void. This option is not supported for C++. +@item -fconvert-if-to-switch +@opindex fconvert-if-to-switch +Perform conversion of an if cascade into a switch statement. +The transformation can help to produce faster code for +the switch statement. This flag is enabled by default +at @option{-O2} and higher. + @item -flax-vector-conversions @opindex flax-vector-conversions Allow implicit conversions between vectors with differing numbers of @@ -8423,6 +8430,7 @@ also turns on the following optimization flags: -falign-labels -falign-loops @gol -fcaller-saves @gol -fcode-hoisting @gol +-fconvert-if-to-switch @gol -fcrossjumping @gol -fcse-follow-jumps -fcse-skip-blocks @gol -fdelete-null-pointer-checks @gol diff --git a/gcc/gimple-if-to-switch.c b/gcc/gimple-if-to-switch.c new file mode 100644 index 00000000000..4fa75598f70 --- /dev/null +++ b/gcc/gimple-if-to-switch.c @@ -0,0 +1,661 @@ +/* If-elseif-else to switch conversion pass + Copyright (C) 2019 Free Software Foundation, Inc. + +This file is part of GCC. + +GCC is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 3, or (at your option) +any later version. + +GCC is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GCC; see the file COPYING3. If not see +<http://www.gnu.org/licenses/>. */ + +/* Algorithm of the pass runs in the following steps: + a) We walk basic blocks in DOMINATOR order so that we first reach + a first condition of a future switch. + b) We follow false edges of a if-else-chain and we record chain + of GIMPLE conditions. These blocks are only used for comparison + of a common SSA_NAME and we do not allow any side effect. + c) We remove all basic blocks (except first) of such chain and + GIMPLE switch replaces the condition in the first basic block. + d) We move all GIMPLE statements in the removed blocks into the + first one. */ + +#include "config.h" +#include "system.h" +#include "coretypes.h" +#include "backend.h" +#include "rtl.h" +#include "tree.h" +#include "gimple.h" +#include "tree-pass.h" +#include "ssa.h" +#include "gimple-pretty-print.h" +#include "fold-const.h" +#include "gimple-iterator.h" +#include "tree-cfg.h" +#include "tree-dfa.h" +#include "tree-cfgcleanup.h" +#include "alias.h" +#include "tree-ssa-loop.h" +#include "diagnostic.h" +#include "cfghooks.h" +#include "tree-into-ssa.h" +#include "cfganal.h" +#include "dbgcnt.h" + +/* Tuple that holds minimum and maximum values in a case. */ + +struct case_range +{ + /* Default constructor. */ + case_range (): + m_min (NULL_TREE), m_max (NULL_TREE) + {} + + case_range (tree min, tree max): + m_min (min), m_max (max) + {} + + /* Minimum case value. */ + tree m_min; + /* Maximum case value. */ + tree m_max; +}; + +/* One entry of a if chain. */ + +struct if_chain_entry +{ + /* Constructor. */ + if_chain_entry (basic_block bb, edge true_edge, edge false_edge) + : m_case_values (), m_bb (bb), + m_true_edge (true_edge), m_false_edge (false_edge) + { + m_case_values.create (2); + } + + /* Vector of at maximum 2 case ranges. */ + vec<case_range> m_case_values; + /* Basic block of the original condition. */ + basic_block m_bb; + /* True edge of the gimple condition. */ + edge m_true_edge; + /* False edge of the gimple condition. */ + edge m_false_edge; +}; + +/* Master structure for one if to switch conversion candidate. */ + +struct if_chain +{ + /* Default constructor. */ + if_chain(): + m_first_condition (NULL), m_index (NULL_TREE), m_entries (), + m_phi_map () + { + m_entries.create (2); + } + + /* Default destructor. */ + ~if_chain () + { + m_entries.release (); + } + + /* Set index and check that it is not a different one. */ + bool set_and_check_index (tree index); + + /* Verify that all case ranges do not overlap. */ + bool check_non_overlapping_cases (); + + /* Record PHI arguments of a given edge E and return true + if GIMPLE switch creation will violate a PHI node. */ + bool record_phi_arguments (edge e); + + /* First condition of the chain. */ + gcond *m_first_condition; + /* Switch index. */ + tree m_index; + /* If chain entries. */ + vec<if_chain_entry> m_entries; + /* PHI map that is later used for reconstruction of PHI nodes. */ + hash_map<gphi *, tree> m_phi_map; +}; + +bool +if_chain::set_and_check_index (tree index) +{ + if (TREE_CODE (index) != SSA_NAME || !INTEGRAL_TYPE_P (TREE_TYPE (index))) + return false; + + if (m_index == NULL) + m_index = index; + + return index == m_index; +} + +/* Compare two case ranges by minimum value. */ + +static int +range_cmp (const void *a, const void *b) +{ + const case_range *cr1 = *(const case_range * const *) a; + const case_range *cr2 = *(const case_range * const *) b; + + return tree_int_cst_compare (cr1->m_min, cr2->m_min); +} + +bool +if_chain::check_non_overlapping_cases () +{ + auto_vec<case_range *> all_ranges; + for (unsigned i = 0; i < m_entries.length (); i++) + for (unsigned j =0; j < m_entries[i].m_case_values.length (); j++) + all_ranges.safe_push (&m_entries[i].m_case_values[j]); + + all_ranges.qsort (range_cmp); + + for (unsigned i = 0; i < all_ranges.length () - 1; i++) + { + case_range *left = all_ranges[i]; + case_range *right = all_ranges[i + 1]; + if (tree_int_cst_le (left->m_min, right->m_min) + && tree_int_cst_le (right->m_min, left->m_max)) + return false; + } + + return true; +} + +bool +if_chain::record_phi_arguments (edge e) +{ + for (gphi_iterator gsi = gsi_start_phis (e->dest); !gsi_end_p (gsi); + gsi_next (&gsi)) + { + gphi *phi = gsi.phi (); + if (!virtual_operand_p (gimple_phi_result (phi))) + { + tree arg = PHI_ARG_DEF_FROM_EDGE (phi, e); + tree *v = m_phi_map.get (phi); + if (v != NULL) + { + if (arg != *v) + return false; + } + else + m_phi_map.put (phi, arg); + } + } + + return true; +} + +/* Build case label with MIN and MAX values of a given basic block DEST. */ + +static tree +build_case_label (tree min, tree max, basic_block dest) +{ + tree label = gimple_block_label (dest); + return build_case_label (min, min == max ? NULL_TREE : max, label); +} + +/* Compare two integer constants. */ + +static int +label_cmp (const void *a, const void *b) +{ + const_tree l1 = *(const const_tree *) a; + const_tree l2 = *(const const_tree *) b; + + return tree_int_cst_compare (CASE_LOW (l1), CASE_LOW (l2)); +} + +/* Convert a given if CHAIN into a switch GIMPLE statement. */ + +static void +convert_if_conditions_to_switch (if_chain *chain) +{ + if (!dbg_cnt (if_to_switch)) + return; + + auto_vec<tree> labels; + if_chain_entry first_cond = chain->m_entries[0]; + + unsigned entries = chain->m_entries.length (); + edge default_edge = chain->m_entries[entries - 1].m_false_edge; + basic_block default_bb = default_edge->dest; + + gimple_stmt_iterator gsi = gsi_for_stmt (chain->m_first_condition); + for (unsigned i = 0; i < chain->m_entries.length (); i++) + { + if_chain_entry entry = chain->m_entries[i]; + + basic_block case_bb = entry.m_true_edge->dest; + + for (unsigned j = 0; j < entry.m_case_values.length (); j++) + labels.safe_push (build_case_label (entry.m_case_values[j].m_min, + entry.m_case_values[j].m_max, + case_bb)); + default_bb = entry.m_false_edge->dest; + + if (i == 0) + { + remove_edge (first_cond.m_true_edge); + remove_edge (first_cond.m_false_edge); + } + else + { + /* Move all statements from the BB to the BB with gswitch. */ + auto_vec<gimple *> stmts; + for (gimple_stmt_iterator gsi = gsi_start_bb (entry.m_bb); + !gsi_end_p (gsi); gsi_next (&gsi)) + { + gimple *stmt = gsi_stmt (gsi); + if (gimple_code (stmt) != GIMPLE_COND) + stmts.safe_push (stmt); + } + + for (unsigned i = 0; i < stmts.length (); i++) + { + gimple_stmt_iterator gsi_from = gsi_for_stmt (stmts[i]); + gsi_move_before (&gsi_from, &gsi); + } + + delete_basic_block (entry.m_bb); + } + + make_edge (first_cond.m_bb, case_bb, 0); + } + + labels.qsort (label_cmp); + + edge e = find_edge (first_cond.m_bb, default_bb); + if (e == NULL) + e = make_edge (first_cond.m_bb, default_bb, 0); + gswitch *s + = gimple_build_switch (chain->m_index, + build_case_label (NULL_TREE, NULL_TREE, default_bb), + labels); + + gsi_remove (&gsi, true); + gsi_insert_before (&gsi, s, GSI_NEW_STMT); + + if (dump_file) + { + fprintf (dump_file, "Expanded into a new gimple STMT: "); + print_gimple_stmt (dump_file, s, 0, TDF_SLIM); + putc ('\n', dump_file); + } + + /* Fill up missing PHI node arguments. */ + for (hash_map<gphi *, tree>::iterator it = chain->m_phi_map.begin (); + it != chain->m_phi_map.end (); ++it) + { + gphi *phi = (*it).first; + if (!virtual_operand_p (gimple_phi_result (phi))) + { + for (unsigned i = 0; i < gimple_phi_num_args (phi); i++) + { + if (gimple_phi_arg_def (phi, i) == NULL_TREE) + { + add_phi_arg (phi, (*it).second, gimple_phi_arg_edge (phi, i), + UNKNOWN_LOCATION); + break; + } + } + } + } +} + +static bool +extract_case_from_stmt (tree rhs1, tree rhs2, tree_code code, + if_chain *chain, if_chain_entry *entry, + unsigned *visited_stmt_count) +{ + tree index = NULL_TREE; + case_range range; + + if (code == EQ_EXPR) + { + /* Handle situation 2a: + _1 = aChar_8(D) == 1; */ + index = rhs1; + + /* We can meet a readonly type used for a constant. */ + rhs2 = fold_convert (TREE_TYPE (index), rhs2); + if (TREE_CODE (rhs2) != INTEGER_CST) + return false; + + range = case_range (rhs2, rhs2); + *visited_stmt_count += 1; + } + else if (code == LE_EXPR) + { + /* Handle situation 2b: + aChar.1_1 = (unsigned int) aChar_10(D); + _2 = aChar.1_1 + 4294967287; + _3 = _2 <= 1; */ + tree ssa = rhs1; + tree range_size = rhs2; + if (TREE_CODE (ssa) != SSA_NAME + || TREE_CODE (range_size) != INTEGER_CST) + return false; + + gassign *subtraction = dyn_cast<gassign *> (SSA_NAME_DEF_STMT (ssa)); + if (subtraction == NULL + || gimple_assign_rhs_code (subtraction) != PLUS_EXPR) + return false; + + tree casted = gimple_assign_rhs1 (subtraction); + tree min = gimple_assign_rhs2 (subtraction); + if (TREE_CODE (casted) != SSA_NAME + || TREE_CODE (min) != INTEGER_CST) + return false; + + if (!SSA_NAME_IS_DEFAULT_DEF (casted)) + { + gassign *to_unsigned + = dyn_cast<gassign *> (SSA_NAME_DEF_STMT (casted)); + if (to_unsigned == NULL + || !gimple_assign_unary_nop_p (to_unsigned) + || !TYPE_UNSIGNED (TREE_TYPE (casted))) + return false; + index = gimple_assign_rhs1 (to_unsigned); + ++(*visited_stmt_count); + } + else + index = casted; + + tree type = TREE_TYPE (index); + tree range_min = fold_convert (type, const_unop (NEGATE_EXPR, type, min)); + range = case_range (range_min, const_binop (PLUS_EXPR, type, range_min, + fold_convert (type, + range_size))); + *visited_stmt_count += 2; + } + else + return false; + + if (!chain->set_and_check_index (index)) + return false; + entry->m_case_values.safe_push (range); + + return true; +} + +static void +find_switch_in_bb (basic_block bb, auto_vec<if_chain *> *all_candidates, + auto_bitmap *visited_bbs) +{ + if_chain *chain = new if_chain (); + unsigned total_case_values = 0; + + while (true) + { + bool first = chain->m_entries.is_empty (); + if (bitmap_bit_p (*visited_bbs, bb->index)) + break; + bitmap_set_bit (*visited_bbs, bb->index); + + gimple_stmt_iterator gsi = gsi_last_nondebug_bb (bb); + if (gsi_end_p (gsi)) + break; + + if (!chain->m_entries.is_empty () && EDGE_COUNT (bb->preds) != 1) + break; + + gcond *cond = dyn_cast<gcond *> (gsi_stmt (gsi)); + if (cond == NULL) + break; + + if (first) + chain->m_first_condition = cond; + + edge true_edge, false_edge; + extract_true_false_edges_from_block (bb, &true_edge, &false_edge); + + /* Prevent loosing information for a PHI node where 2 edges will + be folded into one. Note that we must do the same also for false_edge + (for last BB in a if-elseif chain). */ + if (!chain->record_phi_arguments (true_edge) + || !chain->record_phi_arguments (false_edge)) + break; + + if_chain_entry entry (bb, true_edge, false_edge); + + /* Current we support following patterns (situations): + + 1) if condition with equal operation: + + <bb 2> : + if (argc_8(D) == 1) + goto <bb 3>; [INV] + else + goto <bb 4>; [INV] + + 2) if condition with a range check: + + <bb 3> : + _4 = c_13(D) + 198; + if (_4 <= 1) + goto <bb 7>; [INV] + else + goto <bb 4>; [INV] + + 3) mixture of 1) and 2) with a or condition: + + <bb 2> : + _1 = aChar_8(D) == 1; + _2 = aChar_8(D) == 10; + _3 = _1 | _2; + if (_3 != 0) + goto <bb 5>; [INV] + else + goto <bb 3>; [INV] + + or: + + <bb 2> : + aChar.1_1 = (unsigned int) aChar_10(D); + _2 = aChar.1_1 + 4294967287; + _3 = _2 <= 1; + _4 = aChar_10(D) == 12; + _5 = _3 | _4; + if (_5 != 0) + goto <bb 5>; [INV] + else + goto <bb 3>; [INV] + */ + + tree lhs = gimple_cond_lhs (cond); + tree rhs = gimple_cond_rhs (cond); + tree_code code = gimple_cond_code (cond); + unsigned visited_stmt_count = 0; + unsigned case_values = 0; + + /* Situation 1. */ + if (code == EQ_EXPR) + { + if (!extract_case_from_stmt (lhs, rhs, code, chain, &entry, + &visited_stmt_count)) + break; + case_values = 1; + } + /* Situation 2. */ + else if (code == LE_EXPR) + { + case_range range; + if (!extract_case_from_stmt (lhs, rhs, code, chain, &entry, + &visited_stmt_count)) + break; + case_values = 1; + } + /* Situation 3. */ + else if (code == NE_EXPR + && integer_zerop (rhs) + && TREE_CODE (lhs) == SSA_NAME + && TREE_CODE (TREE_TYPE (lhs)) == BOOLEAN_TYPE) + { + gassign *def = dyn_cast<gassign *> (SSA_NAME_DEF_STMT (lhs)); + if (def == NULL + || gimple_assign_rhs_code (def) != BIT_IOR_EXPR + || gimple_bb (def) != bb) + break; + + tree rhs1 = gimple_assign_rhs1 (def); + tree rhs2 = gimple_assign_rhs2 (def); + if (TREE_CODE (rhs1) != SSA_NAME || TREE_CODE (rhs2) != SSA_NAME) + break; + + gassign *def1 = dyn_cast<gassign *> (SSA_NAME_DEF_STMT (rhs1)); + gassign *def2 = dyn_cast<gassign *> (SSA_NAME_DEF_STMT (rhs2)); + if (def1 == NULL + || def2 == NULL + || def1 == def2 + || gimple_bb (def1) != bb + || gimple_bb (def2) != bb) + break; + + if (!extract_case_from_stmt (gimple_assign_rhs1 (def1), + gimple_assign_rhs2 (def1), + gimple_assign_rhs_code (def1), + chain, &entry, + &visited_stmt_count)) + break; + + if (!extract_case_from_stmt (gimple_assign_rhs1 (def2), + gimple_assign_rhs2 (def2), + gimple_assign_rhs_code (def2), + chain, &entry, + &visited_stmt_count)) + break; + case_values = 2; + visited_stmt_count += 2; + } + else + break; + + /* If it's not the first condition, then we need a BB without + any statements. */ + if (!first) + { + unsigned stmt_count = 0; + for (gimple_stmt_iterator gsi = gsi_start_nondebug_bb (bb); + !gsi_end_p (gsi); gsi_next_nondebug (&gsi)) + ++stmt_count; + + if (stmt_count - visited_stmt_count != 0) + break; + } + + total_case_values += case_values; + chain->m_entries.safe_push (entry); + + /* Follow if-elseif-elseif chain. */ + bb = false_edge->dest; + } + + if (total_case_values >= 3 + && chain->check_non_overlapping_cases ()) + { + if (dump_file) + { + expanded_location loc + = expand_location (gimple_location (chain->m_first_condition)); + fprintf (dump_file, "Condition chain (at %s:%d) with %d conditions " + "(%d BBs) transformed into a switch statement.\n", + loc.file, loc.line, total_case_values, + chain->m_entries.length ()); + } + + all_candidates->safe_push (chain); + } + else + { + /* Unmark last if chain entry to that it can become a potential beginning + of another chain. */ + if (!chain->m_entries.is_empty ()) + bitmap_clear_bit (*visited_bbs, bb->index); + delete chain; + } +} + +namespace { + +const pass_data pass_data_if_to_switch = +{ + GIMPLE_PASS, /* type */ + "iftoswitch", /* name */ + OPTGROUP_NONE, /* optinfo_flags */ + TV_TREE_IF_TO_SWITCH, /* tv_id */ + ( PROP_cfg | PROP_ssa ), /* properties_required */ + 0, /* properties_provided */ + 0, /* properties_destroyed */ + 0, /* todo_flags_start */ + TODO_cleanup_cfg | TODO_update_ssa /* todo_flags_finish */ +}; + +class pass_if_to_switch : public gimple_opt_pass +{ +public: + pass_if_to_switch (gcc::context *ctxt) + : gimple_opt_pass (pass_data_if_to_switch, ctxt) + {} + + /* opt_pass methods: */ + virtual bool gate (function *) { return flag_convert_if_to_switch != 0; } + virtual unsigned int execute (function *); + +}; // class pass_if_to_switch + +unsigned int +pass_if_to_switch::execute (function *fun) +{ + calculate_dominance_info (CDI_DOMINATORS); + + auto_vec<if_chain *> all_candidates; + auto_vec<basic_block> worklist; + auto_bitmap visited_bbs; + + worklist.safe_push (ENTRY_BLOCK_PTR_FOR_FN (fun)); + while (!worklist.is_empty ()) + { + basic_block bb = worklist.pop (); + find_switch_in_bb (bb, &all_candidates, &visited_bbs); + for (basic_block son = first_dom_son (CDI_DOMINATORS, bb); son; + son = next_dom_son (CDI_DOMINATORS, son)) + if (!bitmap_bit_p (visited_bbs, son->index)) + worklist.safe_push (son); + } + + for (unsigned i = 0; i < all_candidates.length (); i++) + { + convert_if_conditions_to_switch (all_candidates[i]); + delete all_candidates[i]; + } + + /* For now, just wipe the dominator information. */ + free_dominance_info (CDI_DOMINATORS); + + if (!all_candidates.is_empty ()) + mark_virtual_operands_for_renaming (fun); + + return 0; +} + +} // anon namespace + +gimple_opt_pass * +make_pass_if_to_switch (gcc::context *ctxt) +{ + return new pass_if_to_switch (ctxt); +} diff --git a/gcc/opts.c b/gcc/opts.c index addebf15365..e415e1a2bd2 100644 --- a/gcc/opts.c +++ b/gcc/opts.c @@ -508,6 +508,7 @@ static const struct default_options default_options_table[] = { OPT_LEVELS_2_PLUS, OPT_ftree_vrp, NULL, 1 }, { OPT_LEVELS_2_PLUS, OPT_fvect_cost_model_, NULL, VECT_COST_MODEL_CHEAP }, { OPT_LEVELS_2_PLUS, OPT_finline_functions, NULL, 1 }, + { OPT_LEVELS_2_PLUS, OPT_fconvert_if_to_switch, NULL, 1 }, /* -O2 and above optimizations, but not -Os or -Og. */ { OPT_LEVELS_2_PLUS_SPEED_ONLY, OPT_falign_functions, NULL, 1 }, diff --git a/gcc/passes.def b/gcc/passes.def index 798a391bd35..cfc00d78ec5 100644 --- a/gcc/passes.def +++ b/gcc/passes.def @@ -90,6 +90,7 @@ along with GCC; see the file COPYING3. If not see NEXT_PASS (pass_cd_dce); NEXT_PASS (pass_phiopt, true /* early_p */); NEXT_PASS (pass_tail_recursion); + NEXT_PASS (pass_if_to_switch); NEXT_PASS (pass_convert_switch); NEXT_PASS (pass_cleanup_eh); NEXT_PASS (pass_profile); diff --git a/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-1.c b/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-1.c new file mode 100644 index 00000000000..bcb8ef2a160 --- /dev/null +++ b/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-1.c @@ -0,0 +1,35 @@ +/* { dg-do compile } */ +/* { dg-options "-O2 -fdump-tree-iftoswitch" } */ + +int global; +int foo (); + +int main(int argc, char **argv) +{ + if (argc == 1) + foo (); + else if (argc == 2) + { + global += 1; + } + else if (argc == 3) + { + foo (); + foo (); + } + else if (argc == 4) + { + foo (); + } + else if (argc == 5) + { + global = 2; + } + else + global -= 123; + + global -= 12; + return 0; +} + +/* { dg-final { scan-tree-dump "Condition chain \\(at .*if-to-switch-1.c:9\\) with 5 conditions \\(5 BBs\\) transformed into a switch statement." "iftoswitch" } } */ diff --git a/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-2.c b/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-2.c new file mode 100644 index 00000000000..316e772ec29 --- /dev/null +++ b/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-2.c @@ -0,0 +1,11 @@ +/* { dg-do compile } */ +/* { dg-options "-O2 -fdump-tree-iftoswitch" } */ + +int IsHTMLWhitespaceNoRange(int aChar) +{ + return aChar == 0x0001 || aChar == 0x000A || + aChar == 0x000C || aChar == 0x000E || + aChar == 0x0020; +} + +/* { dg-final { scan-tree-dump "Condition chain \\(at .*if-to-switch-2.c:7\\) with 5 conditions \\(3 BBs\\) transformed into a switch statement." "iftoswitch" } } */ diff --git a/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-3.c b/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-3.c new file mode 100644 index 00000000000..fd07d909a3c --- /dev/null +++ b/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-3.c @@ -0,0 +1,11 @@ +/* { dg-do compile } */ +/* { dg-options "-O2 -fdump-tree-iftoswitch" } */ + +int IsHTMLWhitespace(int aChar) +{ + return aChar == 0x0009 || aChar == 0x000A || + aChar == 0x000C || aChar == 0x000D || + aChar == 0x0020 || aChar == 0x0030; +} + +/* { dg-final { scan-tree-dump "Condition chain \\(at .*if-to-switch-3.c:8\\) with 5 conditions \\(3 BBs\\) transformed into a switch statement." "iftoswitch" } } */ diff --git a/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-4.c b/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-4.c new file mode 100644 index 00000000000..930fbd49996 --- /dev/null +++ b/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-4.c @@ -0,0 +1,36 @@ +/* { dg-do compile } */ +/* { dg-options "-O2 -fdump-tree-iftoswitch" } */ + +int global; +int foo (); + +int main(int argc, char **argv) +{ + if (argc == 1) + foo (); + else if (argc == 2) + { + global += 1; + } + else if (argc == 3) + { + foo (); + foo (); + } + else if (argc == 4) + { + foo (); + } + /* This will be removed with EVRP. */ + else if (argc == 1) + { + global = 2; + } + else + global -= 123; + + global -= 12; + return 0; +} + +/* { dg-final { scan-tree-dump "Condition chain \\(at .*if-to-switch-4.c:9\\) with 4 conditions \\(4 BBs\\) transformed into a switch statement." "iftoswitch" } } */ diff --git a/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-5.c b/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-5.c new file mode 100644 index 00000000000..acb8b4b1211 --- /dev/null +++ b/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-5.c @@ -0,0 +1,12 @@ +/* { dg-do compile } */ +/* { dg-options "-O2 -fdump-tree-iftoswitch" } */ + +int crud (unsigned char c) +{ + return (((((((((((int) c == 46) || (int) c == 44) + || (int) c == 58) || (int) c == 59) || (int) c == 60) + || (int) c == 62) || (int) c == 34) || (int) c == 92) + || (int) c == 39) != 0); +} + +/* { dg-final { scan-tree-dump "Condition chain \\(at .*if-to-switch-5.c:9\\) with 8 conditions \\(5 BBs\\) transformed into a switch statement." "iftoswitch" } } */ diff --git a/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-6.c b/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-6.c new file mode 100644 index 00000000000..2ac09fc632e --- /dev/null +++ b/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-6.c @@ -0,0 +1,42 @@ +/* { dg-do compile } */ +/* { dg-options "-O2 -fdump-tree-iftoswitch" } */ + +int global; +int foo (); + +int main(int argc, char **argv) +{ + if (argc >= 1 && argc <= 10) + foo (); + else if (argc == 12) + { + global += 1; + } + else if (argc == 13) + { + foo (); + foo (); + } + else if (argc == 14) + { + foo (); + } + /* This will be removed with EVRP. */ + else if (argc == 5) + { + global = 2; + } + /* This will be removed with EVRP. */ + else if (argc >= 7 && argc <= 9) + { + global = 2; + } + + else + global -= 123; + + global -= 12; + return 0; +} + +/* { dg-final { scan-tree-dump "Condition chain \\(at .*if-to-switch-6.c:9\\) with 4 conditions \\(4 BBs\\) transformed into a switch statement." "iftoswitch" } } */ diff --git a/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-7.c b/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-7.c new file mode 100644 index 00000000000..1a919bf025a --- /dev/null +++ b/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-7.c @@ -0,0 +1,25 @@ +/* { dg-do compile } */ +/* { dg-options "-O2 -fdump-tree-iftoswitch" } */ + +int global; + +int foo(int a) +{ + int x = 0; + for (unsigned i = 0; i < a; i++) + { + if (a == 2) + { + global += 123; + x = 1; + } + else if (a == 3) + x = 2; + else if (a == 10) + x = 3; + } + + return x; +} + +/* { dg-final { scan-tree-dump-not "Condition chain " "iftoswitch" } } */ diff --git a/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-8.c b/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-8.c new file mode 100644 index 00000000000..2c1c147ba44 --- /dev/null +++ b/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-8.c @@ -0,0 +1,27 @@ +/* { dg-do compile } */ +/* { dg-options "-O2 -fdump-tree-iftoswitch" } */ + +int global; +int global1; +int global2; +int global3; + +int foo(int a, int b) +{ + int x = 0; + for (unsigned i = 0; i < a; i++) + { + if (b == 1) + global += 2; + else if (a == 2) + global = 123; + else if (a == 3) + global1 = 1234; + else if (a == 10) + global2 = 12345; + else if (a == 1) + global2 = 123456; + } +} + +/* { dg-final { scan-tree-dump "Condition chain \\(at .*if-to-switch-8.c:16\\) with 4 conditions \\(4 BBs\\) transformed into a switch statement." "iftoswitch" } } */ diff --git a/gcc/testsuite/gcc.dg/tree-ssa/reassoc-32.c b/gcc/testsuite/gcc.dg/tree-ssa/reassoc-32.c index 944362ad076..8e53620a4df 100644 --- a/gcc/testsuite/gcc.dg/tree-ssa/reassoc-32.c +++ b/gcc/testsuite/gcc.dg/tree-ssa/reassoc-32.c @@ -1,6 +1,6 @@ /* { dg-do run { target { ! "m68k*-*-* mmix*-*-* bfin*-*-* v850*-*-* moxie*-*-* cris*-*-* m32c*-*-* fr30*-*-* mcore*-*-* powerpc*-*-* xtensa*-*-*"} } } */ -/* { dg-options "-O2 -fno-inline -fdump-tree-reassoc1-details --param logical-op-non-short-circuit=1" } */ +/* { dg-options "-O2 -fno-inline -fdump-tree-reassoc1-details --param logical-op-non-short-circuit=1 -fno-convert-if-to-switch" } */ /* { dg-additional-options "-mbranch-cost=2" { target branch_cost } } */ diff --git a/gcc/testsuite/gcc.dg/tree-ssa/reassoc-33.c b/gcc/testsuite/gcc.dg/tree-ssa/reassoc-33.c index db0ce4c8463..5a66114616d 100644 --- a/gcc/testsuite/gcc.dg/tree-ssa/reassoc-33.c +++ b/gcc/testsuite/gcc.dg/tree-ssa/reassoc-33.c @@ -1,6 +1,6 @@ /* { dg-do run { target { ! "m68k*-*-* mmix*-*-* bfin*-*-* v850*-*-* moxie*-*-* cris*-*-* m32c*-*-* fr30*-*-* mcore*-*-* powerpc*-*-* xtensa*-*-* hppa*-*-* nios2*-*-* or1k-*-*-* pru*-*-*"} } } */ -/* { dg-options "-O2 -fno-inline -fdump-tree-reassoc1-details --param logical-op-non-short-circuit=1" } */ +/* { dg-options "-O2 -fno-inline -fdump-tree-reassoc1-details --param logical-op-non-short-circuit=1 -fno-convert-if-to-switch" } */ /* { dg-additional-options "-mbranch-cost=2" { target branch_cost } } */ int test (int a, int b, int c) diff --git a/gcc/timevar.def b/gcc/timevar.def index 357fcfd65c5..20ea20a6178 100644 --- a/gcc/timevar.def +++ b/gcc/timevar.def @@ -290,6 +290,7 @@ DEFTIMEVAR (TV_VAR_TRACKING , "variable tracking") DEFTIMEVAR (TV_VAR_TRACKING_DATAFLOW , "var-tracking dataflow") DEFTIMEVAR (TV_VAR_TRACKING_EMIT , "var-tracking emit") DEFTIMEVAR (TV_TREE_IFCOMBINE , "tree if-combine") +DEFTIMEVAR (TV_TREE_IF_TO_SWITCH , "if to switch conversion") DEFTIMEVAR (TV_TREE_UNINIT , "uninit var analysis") DEFTIMEVAR (TV_PLUGIN_INIT , "plugin initialization") DEFTIMEVAR (TV_PLUGIN_RUN , "plugin execution") diff --git a/gcc/tree-pass.h b/gcc/tree-pass.h index a987661530e..84c498cb26e 100644 --- a/gcc/tree-pass.h +++ b/gcc/tree-pass.h @@ -374,6 +374,7 @@ extern gimple_opt_pass *make_pass_empty_loop (gcc::context *ctxt); extern gimple_opt_pass *make_pass_graphite (gcc::context *ctxt); extern gimple_opt_pass *make_pass_graphite_transforms (gcc::context *ctxt); extern gimple_opt_pass *make_pass_if_conversion (gcc::context *ctxt); +extern gimple_opt_pass *make_pass_if_to_switch (gcc::context *ctxt); extern gimple_opt_pass *make_pass_loop_distribution (gcc::context *ctxt); extern gimple_opt_pass *make_pass_vectorize (gcc::context *ctxt); extern gimple_opt_pass *make_pass_simduid_cleanup (gcc::context *ctxt); -- 2.24.0 ^ permalink raw reply [flat|nested] 49+ messages in thread
* Re: [PATCH] Add if-chain to switch conversion pass. 2019-11-15 13:56 ` Martin Liška @ 2020-09-01 11:47 ` Martin Liška 2020-09-01 14:50 ` David Malcolm 0 siblings, 1 reply; 49+ messages in thread From: Martin Liška @ 2020-09-01 11:47 UTC (permalink / raw) To: Richard Biener; +Cc: Jakub Jelinek, GCC Patches, kazu, Jan Hubicka [-- Attachment #1: Type: text/plain, Size: 516 bytes --] Hello. There's a new version of the patch attempt. I mentioned couple of issues with the v1 here: https://gcc.gnu.org/pipermail/gcc-patches/2020-March/542821.html The patch addresses the biggest blocker which fact that the optimization was done unconditionally. Now the transformation happens only when a bit test or (and) a jump table can be created. Patch can bootstrap on x86_64-linux-gnu and survives regression tests. I'm also sending list of if-chains that are transformed in GCC. Thoughts? Thanks, Martin [-- Attachment #2: if-to-switch.txt --] [-- Type: text/plain, Size: 77388 bytes --] build-x86_64-pc-linux-gnu/libcpp/expr.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/libcpp/expr.c:371) with 5 conditions (5 BBs) transformed into a switch statement. build-x86_64-pc-linux-gnu/libcpp/expr.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/libcpp/expr.c:391) with 5 conditions (5 BBs) transformed into a switch statement. build-x86_64-pc-linux-gnu/libcpp/expr.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/libcpp/expr.c:411) with 5 conditions (5 BBs) transformed into a switch statement. build-x86_64-pc-linux-gnu/libcpp/expr.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/libcpp/expr.c:431) with 5 conditions (5 BBs) transformed into a switch statement. build-x86_64-pc-linux-gnu/libcpp/init.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/libcpp/init.c:553) with 8 conditions (8 BBs) transformed into a switch statement. build-x86_64-pc-linux-gnu/libcpp/lex.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/libcpp/lex.c:1856) with 27 conditions (14 BBs) transformed into a switch statement. build-x86_64-pc-linux-gnu/libcpp/lex.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/libcpp/lex.c:3512) with 3 conditions (2 BBs) transformed into a switch statement. build-x86_64-pc-linux-gnu/libcpp/lex.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/libcpp/lex.c:4147) with 3 conditions (2 BBs) transformed into a switch statement. build-x86_64-pc-linux-gnu/libcpp/lex.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/libcpp/lex.c:4185) with 4 conditions (2 BBs) transformed into a switch statement. build-x86_64-pc-linux-gnu/libcpp/macro.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/libcpp/macro.c:1164) with 6 conditions (6 BBs) transformed into a switch statement. build-x86_64-pc-linux-gnu/libcpp/traditional.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/libcpp/traditional.c:492) with 3 conditions (3 BBs) transformed into a switch statement. gcc/alias.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/alias.c:2923) with 4 conditions (4 BBs) transformed into a switch statement. gcc/alias.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/alias.c:2925) with 4 conditions (4 BBs) transformed into a switch statement. gcc/asan.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/asan.h:168) with 12 conditions (9 BBs) transformed into a switch statement. gcc/attribs.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/attribs.c:729) with 3 conditions (2 BBs) transformed into a switch statement. gcc/build/genautomata.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/genautomata.c:951) with 8 conditions (8 BBs) transformed into a switch statement. gcc/build/gengtype.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/gengtype.c:1107) with 3 conditions (2 BBs) transformed into a switch statement. gcc/build/gengtype.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/gengtype.c:2491) with 5 conditions (4 BBs) transformed into a switch statement. gcc/build/gengtype.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/gengtype.h:344) with 5 conditions (5 BBs) transformed into a switch statement. gcc/build/genmatch.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/is-a.h:224) with 5 conditions (5 BBs) transformed into a switch statement. gcc/build/genmatch.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/is-a.h:224) with 5 conditions (5 BBs) transformed into a switch statement. gcc/build/genmatch.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/is-a.h:224) with 5 conditions (5 BBs) transformed into a switch statement. gcc/build/genoutput.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/genoutput.c:763) with 3 conditions (2 BBs) transformed into a switch statement. gcc/build/genpeep.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/genpeep.c:250) with 8 conditions (8 BBs) transformed into a switch statement. gcc/build/genpreds.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/genpreds.c:794) with 3 conditions (3 BBs) transformed into a switch statement. gcc/build/gensupport.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/gensupport.c:1634) with 3 conditions (2 BBs) transformed into a switch statement. gcc/build/gensupport.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/gensupport.c:1674) with 3 conditions (2 BBs) transformed into a switch statement. gcc/build/gensupport.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/gensupport.c:3260) with 4 conditions (4 BBs) transformed into a switch statement. gcc/build/read-md.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/read-md.c:467) with 6 conditions (3 BBs) transformed into a switch statement. gcc/build/read-rtl.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/read-rtl.c:1889) with 4 conditions (3 BBs) transformed into a switch statement. gcc/builtins.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/asan.h:168) with 12 conditions (9 BBs) transformed into a switch statement. gcc/builtins.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/gimple.h:2877) with 4 conditions (2 BBs) transformed into a switch statement. gcc/c/c-decl.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/c/c-decl.c:10564) with 10 conditions (10 BBs) transformed into a switch statement. gcc/c/c-decl.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/c/c-decl.c:10621) with 11 conditions (11 BBs) transformed into a switch statement. gcc/c/c-decl.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/c/c-decl.c:10682) with 9 conditions (9 BBs) transformed into a switch statement. gcc/c/c-decl.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/c/c-decl.c:10734) with 9 conditions (9 BBs) transformed into a switch statement. gcc/c/c-decl.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/c/c-decl.c:10785) with 8 conditions (8 BBs) transformed into a switch statement. gcc/c/c-decl.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/c/c-decl.c:10831) with 12 conditions (12 BBs) transformed into a switch statement. gcc/c/c-decl.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/c/c-decl.c:12065) with 4 conditions (3 BBs) transformed into a switch statement. gcc/c/c-decl.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/c/c-decl.c:7511) with 3 conditions (2 BBs) transformed into a switch statement. gcc/c/c-parser.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/c/c-parser.c:384) with 8 conditions (4 BBs) transformed into a switch statement. gcc/c/c-typeck.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/c/c-typeck.c:2830) with 3 conditions (2 BBs) transformed into a switch statement. gcc/c/c-typeck.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/c/c-typeck.c:8031) with 5 conditions (3 BBs) transformed into a switch statement. gcc/c-family/c-ada-spec.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/c-family/c-ada-spec.c:468) with 5 conditions (5 BBs) transformed into a switch statement. gcc/c-family/c-attribs.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/c-family/c-attribs.c:1827) with 4 conditions (4 BBs) transformed into a switch statement. gcc/c-family/c-common.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/c-family/c-common.c:2872) with 6 conditions (6 BBs) transformed into a switch statement. gcc/c-family/c-common.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/c-family/c-common.c:6179) with 10 conditions (10 BBs) transformed into a switch statement. gcc/c-family/c-format.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/c-family/c-format.c:2447) with 3 conditions (2 BBs) transformed into a switch statement. gcc/c-family/c-lex.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/c-family/c-lex.c:545) with 8 conditions (7 BBs) transformed into a switch statement. gcc/c-family/c-omp.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/c-family/c-omp.c:2022) with 3 conditions (2 BBs) transformed into a switch statement. gcc/c-family/c-warn.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/c-family/c-warn.c:1796) with 5 conditions (5 BBs) transformed into a switch statement. gcc/c-family/c-warn.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/c-family/c-warn.c:2950) with 3 conditions (3 BBs) transformed into a switch statement. gcc/cfgexpand.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/cfgexpand.c:224) with 5 conditions (5 BBs) transformed into a switch statement. gcc/cfgexpand.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/cfgexpand.c:4992) with 3 conditions (3 BBs) transformed into a switch statement. gcc/cfgexpand.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/cfgexpand.c:6145) with 4 conditions (4 BBs) transformed into a switch statement. gcc/cgraph.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/cgraph.h:2791) with 3 conditions (2 BBs) transformed into a switch statement. gcc/combine.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/combine.c:11875) with 4 conditions (2 BBs) transformed into a switch statement. gcc/combine.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/combine.c:11890) with 5 conditions (3 BBs) transformed into a switch statement. gcc/combine.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/combine.c:11895) with 3 conditions (2 BBs) transformed into a switch statement. gcc/combine.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/combine.c:6695) with 4 conditions (4 BBs) transformed into a switch statement. gcc/combine.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/combine.c:6712) with 4 conditions (4 BBs) transformed into a switch statement. gcc/combine.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/combine.c:6750) with 4 conditions (4 BBs) transformed into a switch statement. gcc/combine.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/combine.c:9398) with 5 conditions (3 BBs) transformed into a switch statement. gcc/cp/call.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/cp/call.c:10611) with 3 conditions (2 BBs) transformed into a switch statement. gcc/cp/cp-gimplify.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/cp/cp-gimplify.c:1240) with 3 conditions (3 BBs) transformed into a switch statement. gcc/cp/cp-gimplify.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/gimple-expr.h:87) with 4 conditions (3 BBs) transformed into a switch statement. gcc/cp/decl2.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/cp/decl2.c:1356) with 6 conditions (6 BBs) transformed into a switch statement. gcc/cp/decl.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/cp/decl.c:2495) with 8 conditions (8 BBs) transformed into a switch statement. gcc/cp/error.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/cp/error.c:3089) with 4 conditions (3 BBs) transformed into a switch statement. gcc/cp/init.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/cp/init.c:2608) with 3 conditions (3 BBs) transformed into a switch statement. gcc/cp/lex.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/cp/lex.c:695) with 6 conditions (6 BBs) transformed into a switch statement. gcc/cp/parser.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/cp/parser.c:10890) with 3 conditions (3 BBs) transformed into a switch statement. gcc/cp/parser.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/cp/parser.c:11901) with 3 conditions (2 BBs) transformed into a switch statement. gcc/cp/parser.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/cp/parser.c:20818) with 3 conditions (3 BBs) transformed into a switch statement. gcc/cp/parser.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/cp/parser.c:22477) with 4 conditions (3 BBs) transformed into a switch statement. gcc/cp/parser.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/cp/parser.c:22896) with 4 conditions (3 BBs) transformed into a switch statement. gcc/cp/parser.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/cp/parser.c:24874) with 3 conditions (2 BBs) transformed into a switch statement. gcc/cp/parser.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/cp/parser.c:26353) with 6 conditions (5 BBs) transformed into a switch statement. gcc/cp/parser.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/cp/parser.c:29085) with 3 conditions (2 BBs) transformed into a switch statement. gcc/cp/parser.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/cp/parser.c:30973) with 3 conditions (2 BBs) transformed into a switch statement. gcc/cp/parser.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/cp/parser.c:31823) with 3 conditions (2 BBs) transformed into a switch statement. gcc/cp/parser.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/cp/parser.c:32669) with 12 conditions (7 BBs) transformed into a switch statement. gcc/cp/parser.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/cp/parser.c:7488) with 4 conditions (4 BBs) transformed into a switch statement. gcc/cp/pt.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/cp/pt.c:20116) with 4 conditions (4 BBs) transformed into a switch statement. gcc/cp/pt.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/cp/type-utils.h:44) with 4 conditions (2 BBs) transformed into a switch statement. gcc/cp/semantics.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/cp/semantics.c:5663) with 4 conditions (3 BBs) transformed into a switch statement. gcc/cp/tree.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/cp/tree.c:5388) with 5 conditions (5 BBs) transformed into a switch statement. gcc/cselib.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/cselib.c:1004) with 3 conditions (3 BBs) transformed into a switch statement. gcc/cselib.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/cselib.c:1358) with 3 conditions (3 BBs) transformed into a switch statement. gcc/cselib.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/cselib.c:1398) with 3 conditions (2 BBs) transformed into a switch statement. gcc/cselib.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/cselib.c:878) with 3 conditions (2 BBs) transformed into a switch statement. gcc/cselib.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/cselib.c:974) with 3 conditions (3 BBs) transformed into a switch statement. gcc/diagnostic-show-locus.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/diagnostic-show-locus.c:823) with 3 conditions (2 BBs) transformed into a switch statement. gcc/diagnostic-show-locus.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/diagnostic-show-locus.c:830) with 3 conditions (2 BBs) transformed into a switch statement. gcc/dwarf2out.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/dwarf2out.c:14551) with 3 conditions (3 BBs) transformed into a switch statement. gcc/dwarf2out.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/dwarf2out.c:14561) with 3 conditions (3 BBs) transformed into a switch statement. gcc/dwarf2out.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/dwarf2out.c:14573) with 3 conditions (3 BBs) transformed into a switch statement. gcc/dwarf2out.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/dwarf2out.c:16918) with 3 conditions (2 BBs) transformed into a switch statement. gcc/dwarf2out.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/dwarf2out.c:20725) with 3 conditions (2 BBs) transformed into a switch statement. gcc/dwarf2out.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/dwarf2out.c:21545) with 4 conditions (3 BBs) transformed into a switch statement. gcc/dwarf2out.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/dwarf2out.c:29651) with 3 conditions (2 BBs) transformed into a switch statement. gcc/dwarf2out.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/dwarf2out.c:5412) with 4 conditions (2 BBs) transformed into a switch statement. gcc/dwarf2out.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/dwarf2out.c:7127) with 3 conditions (2 BBs) transformed into a switch statement. gcc/dwarf2out.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/dwarf2out.c:7924) with 4 conditions (3 BBs) transformed into a switch statement. gcc/dwarf2out.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/dwarf2out.c:8615) with 4 conditions (3 BBs) transformed into a switch statement. gcc/emit-rtl.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/emit-rtl.c:6359) with 3 conditions (3 BBs) transformed into a switch statement. gcc/emit-rtl.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/emit-rtl.c:6380) with 3 conditions (3 BBs) transformed into a switch statement. gcc/expmed.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/expmed.c:1708) with 5 conditions (5 BBs) transformed into a switch statement. gcc/expmed.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/expmed.c:6272) with 8 conditions (8 BBs) transformed into a switch statement. gcc/final.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/final.c:3325) with 3 conditions (2 BBs) transformed into a switch statement. gcc/fixed-value.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/fixed-value.c:1022) with 3 conditions (3 BBs) transformed into a switch statement. gcc/fixed-value.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/fixed-value.c:1025) with 3 conditions (3 BBs) transformed into a switch statement. gcc/fixed-value.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/fixed-value.c:1039) with 3 conditions (3 BBs) transformed into a switch statement. gcc/fixed-value.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/fixed-value.c:1098) with 3 conditions (3 BBs) transformed into a switch statement. gcc/fixed-value.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/fixed-value.c:1112) with 4 conditions (4 BBs) transformed into a switch statement. gcc/fixed-value.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/fixed-value.c:145) with 3 conditions (3 BBs) transformed into a switch statement. gcc/fixed-value.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/fixed-value.c:148) with 3 conditions (3 BBs) transformed into a switch statement. gcc/fixed-value.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/fixed-value.c:159) with 3 conditions (3 BBs) transformed into a switch statement. gcc/fixed-value.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/fixed-value.c:182) with 4 conditions (2 BBs) transformed into a switch statement. gcc/fixed-value.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/fixed-value.c:240) with 4 conditions (2 BBs) transformed into a switch statement. gcc/fixed-value.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/fixed-value.c:328) with 3 conditions (3 BBs) transformed into a switch statement. gcc/fixed-value.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/fixed-value.c:403) with 3 conditions (3 BBs) transformed into a switch statement. gcc/fixed-value.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/fixed-value.c:518) with 3 conditions (3 BBs) transformed into a switch statement. gcc/fixed-value.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/fixed-value.c:630) with 3 conditions (3 BBs) transformed into a switch statement. gcc/fixed-value.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/fixed-value.c:682) with 3 conditions (3 BBs) transformed into a switch statement. gcc/fixed-value.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/fixed-value.c:69) with 4 conditions (3 BBs) transformed into a switch statement. gcc/fixed-value.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/fixed-value.c:782) with 3 conditions (3 BBs) transformed into a switch statement. gcc/fixed-value.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/fixed-value.c:786) with 3 conditions (3 BBs) transformed into a switch statement. gcc/fixed-value.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/fixed-value.c:790) with 3 conditions (3 BBs) transformed into a switch statement. gcc/fixed-value.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/fixed-value.c:794) with 3 conditions (3 BBs) transformed into a switch statement. gcc/fixed-value.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/fixed-value.c:823) with 3 conditions (3 BBs) transformed into a switch statement. gcc/fixed-value.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/fixed-value.c:828) with 4 conditions (4 BBs) transformed into a switch statement. gcc/fixed-value.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/fixed-value.c:886) with 3 conditions (3 BBs) transformed into a switch statement. gcc/fixed-value.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/fixed-value.c:889) with 3 conditions (3 BBs) transformed into a switch statement. gcc/fixed-value.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/fixed-value.c:890) with 3 conditions (3 BBs) transformed into a switch statement. gcc/fixed-value.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/fixed-value.c:896) with 4 conditions (4 BBs) transformed into a switch statement. gcc/fixed-value.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/fixed-value.c:937) with 3 conditions (3 BBs) transformed into a switch statement. gcc/fixed-value.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/fixed-value.c:940) with 3 conditions (3 BBs) transformed into a switch statement. gcc/fixed-value.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/fixed-value.c:977) with 3 conditions (3 BBs) transformed into a switch statement. gcc/fold-const.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/fold-const.c:10330) with 3 conditions (2 BBs) transformed into a switch statement. gcc/fold-const.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/fold-const.c:1848) with 3 conditions (2 BBs) transformed into a switch statement. gcc/fold-const.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/fold-const.c:2100) with 3 conditions (3 BBs) transformed into a switch statement. gcc/fold-const.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/fold-const.c:2105) with 3 conditions (3 BBs) transformed into a switch statement. gcc/fold-const.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/fold-const.c:2117) with 4 conditions (4 BBs) transformed into a switch statement. gcc/fold-const.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/fold-const.c:8332) with 4 conditions (4 BBs) transformed into a switch statement. gcc/fold-const.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/fold-const.c:8719) with 5 conditions (3 BBs) transformed into a switch statement. gcc/fold-const.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/fold-const.c:9063) with 3 conditions (2 BBs) transformed into a switch statement. gcc/fortran/check.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/fortran/check.c:329) with 3 conditions (2 BBs) transformed into a switch statement. gcc/fortran/check.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/fortran/check.c:418) with 3 conditions (2 BBs) transformed into a switch statement. gcc/fortran/decl.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/fortran/decl.c:10381) with 3 conditions (2 BBs) transformed into a switch statement. gcc/fortran/decl.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/fortran/decl.c:4139) with 3 conditions (2 BBs) transformed into a switch statement. gcc/fortran/decl.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/fortran/decl.c:5457) with 3 conditions (2 BBs) transformed into a switch statement. gcc/fortran/decl.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/fortran/decl.c:6166) with 3 conditions (2 BBs) transformed into a switch statement. gcc/fortran/decl.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/fortran/decl.c:6178) with 3 conditions (2 BBs) transformed into a switch statement. gcc/fortran/dump-parse-tree.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/fortran/dump-parse-tree.c:1891) with 8 conditions (7 BBs) transformed into a switch statement. gcc/fortran/dump-parse-tree.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/fortran/dump-parse-tree.c:3262) with 6 conditions (6 BBs) transformed into a switch statement. gcc/fortran/interface.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/fortran/interface.c:4091) with 3 conditions (2 BBs) transformed into a switch statement. gcc/fortran/intrinsic.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/fortran/intrinsic.c:4932) with 6 conditions (5 BBs) transformed into a switch statement. gcc/fortran/match.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/fortran/match.c:173) with 3 conditions (2 BBs) transformed into a switch statement. gcc/fortran/match.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/fortran/match.c:214) with 3 conditions (2 BBs) transformed into a switch statement. gcc/fortran/match.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/fortran/match.c:2934) with 5 conditions (5 BBs) transformed into a switch statement. gcc/fortran/match.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/fortran/match.c:3043) with 3 conditions (2 BBs) transformed into a switch statement. gcc/fortran/module.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/fortran/module.c:1020) with 3 conditions (2 BBs) transformed into a switch statement. gcc/fortran/module.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/fortran/module.c:1042) with 3 conditions (2 BBs) transformed into a switch statement. gcc/fortran/module.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/fortran/module.c:3601) with 3 conditions (2 BBs) transformed into a switch statement. gcc/fortran/module.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/fortran/module.c:4574) with 3 conditions (2 BBs) transformed into a switch statement. gcc/fortran/module.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/fortran/module.c:5355) with 3 conditions (3 BBs) transformed into a switch statement. gcc/fortran/parse.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/fortran/parse.c:1819) with 3 conditions (3 BBs) transformed into a switch statement. gcc/fortran/parse.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/fortran/parse.c:338) with 3 conditions (2 BBs) transformed into a switch statement. gcc/fortran/primary.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/fortran/primary.c:1155) with 4 conditions (2 BBs) transformed into a switch statement. gcc/fortran/primary.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/fortran/primary.c:3892) with 3 conditions (2 BBs) transformed into a switch statement. gcc/fortran/resolve.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/fortran/resolve.c:1551) with 3 conditions (3 BBs) transformed into a switch statement. gcc/fortran/resolve.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/fortran/resolve.c:1687) with 4 conditions (3 BBs) transformed into a switch statement. gcc/fortran/resolve.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/fortran/resolve.c:2788) with 3 conditions (2 BBs) transformed into a switch statement. gcc/fortran/resolve.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/fortran/resolve.c:547) with 3 conditions (2 BBs) transformed into a switch statement. gcc/fortran/resolve.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/fortran/resolve.c:7869) with 3 conditions (2 BBs) transformed into a switch statement. gcc/fortran/resolve.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/fortran/resolve.c:8061) with 3 conditions (2 BBs) transformed into a switch statement. gcc/fortran/scanner.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/fortran/scanner.c:1038) with 5 conditions (3 BBs) transformed into a switch statement. gcc/fortran/scanner.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/fortran/scanner.c:1553) with 3 conditions (2 BBs) transformed into a switch statement. gcc/fortran/scanner.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/fortran/scanner.c:1805) with 5 conditions (4 BBs) transformed into a switch statement. gcc/fortran/scanner.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/fortran/scanner.c:2215) with 4 conditions (4 BBs) transformed into a switch statement. gcc/fortran/scanner.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/fortran/scanner.c:950) with 3 conditions (2 BBs) transformed into a switch statement. gcc/fortran/scanner.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/fortran/scanner.c:979) with 3 conditions (2 BBs) transformed into a switch statement. gcc/fortran/symbol.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/fortran/symbol.c:1766) with 7 conditions (5 BBs) transformed into a switch statement. gcc/fortran/symbol.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/fortran/symbol.c:3703) with 3 conditions (2 BBs) transformed into a switch statement. gcc/fortran/symbol.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/fortran/symbol.c:5219) with 3 conditions (2 BBs) transformed into a switch statement. gcc/fortran/trans.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/fortran/trans.c:355) with 4 conditions (3 BBs) transformed into a switch statement. gcc/fortran/trans-decl.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/fortran/trans-decl.c:5259) with 3 conditions (2 BBs) transformed into a switch statement. gcc/fortran/trans-decl.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/fortran/trans-decl.c:889) with 3 conditions (2 BBs) transformed into a switch statement. gcc/fortran/trans-decl.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/fortran/trans-decl.c:896) with 3 conditions (2 BBs) transformed into a switch statement. gcc/fortran/trans-decl.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/fortran/trans-decl.c:913) with 3 conditions (2 BBs) transformed into a switch statement. gcc/fortran/trans-io.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/fortran/trans-io.c:2410) with 3 conditions (3 BBs) transformed into a switch statement. gcc/fwprop.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/fwprop.c:373) with 3 conditions (2 BBs) transformed into a switch statement. gcc/gcc.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/gcc.c:3204) with 4 conditions (4 BBs) transformed into a switch statement. gcc/gcc.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/gcc.c:3428) with 4 conditions (3 BBs) transformed into a switch statement. gcc/gcc.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/gcc.c:3436) with 4 conditions (3 BBs) transformed into a switch statement. gcc/gcc.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/gcc.c:6156) with 3 conditions (2 BBs) transformed into a switch statement. gcc/gcc.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/gcc.c:6508) with 3 conditions (3 BBs) transformed into a switch statement. gcc/gcc.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/gcc.c:6530) with 3 conditions (3 BBs) transformed into a switch statement. gcc/gcc.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/gcc.c:9352) with 3 conditions (2 BBs) transformed into a switch statement. gcc/gcc.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/gcc.c:9364) with 3 conditions (2 BBs) transformed into a switch statement. gcc/gcc.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/gcc.c:9445) with 3 conditions (3 BBs) transformed into a switch statement. gcc/gcc.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/gcc.c:9465) with 3 conditions (3 BBs) transformed into a switch statement. gcc/generic-match.c.043t.iftoswitch:Condition chain (at generic-match.c:4798) with 6 conditions (6 BBs) transformed into a switch statement. gcc/generic-match.c.043t.iftoswitch:Condition chain (at generic-match.c:8807) with 6 conditions (6 BBs) transformed into a switch statement. gcc/gengtype.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/gengtype.c:1107) with 3 conditions (2 BBs) transformed into a switch statement. gcc/gengtype.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/gengtype.c:2491) with 5 conditions (4 BBs) transformed into a switch statement. gcc/gengtype.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/gengtype.h:344) with 5 conditions (5 BBs) transformed into a switch statement. gcc/gimple.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/gimple.c:1613) with 4 conditions (3 BBs) transformed into a switch statement. gcc/gimple-expr.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/gimple-expr.h:87) with 4 conditions (3 BBs) transformed into a switch statement. gcc/gimple-fold.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/gimple-fold.c:900) with 4 conditions (4 BBs) transformed into a switch statement. gcc/gimple-fold.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/gimple-fold.c:901) with 4 conditions (4 BBs) transformed into a switch statement. gcc/gimple-match.c.043t.iftoswitch:Condition chain (at gimple-match.c:5041) with 6 conditions (6 BBs) transformed into a switch statement. gcc/gimple-match.c.043t.iftoswitch:Condition chain (at gimple-match.c:9498) with 6 conditions (6 BBs) transformed into a switch statement. gcc/gimple-ssa-isolate-paths.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/gimple-ssa-isolate-paths.c:480) with 3 conditions (2 BBs) transformed into a switch statement. gcc/gimple-ssa-split-paths.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/gimple-ssa-split-paths.c:141) with 3 conditions (2 BBs) transformed into a switch statement. gcc/gimple-ssa-strength-reduction.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/gimple-ssa-strength-reduction.c:2137) with 7 conditions (4 BBs) transformed into a switch statement. gcc/gimple-ssa-warn-alloca.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/gimple.h:2877) with 4 conditions (2 BBs) transformed into a switch statement. gcc/gimplify.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/gimple-expr.h:87) with 4 conditions (3 BBs) transformed into a switch statement. gcc/gimplify.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/gimplify.c:6471) with 3 conditions (2 BBs) transformed into a switch statement. gcc/i386.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.c:13140) with 6 conditions (3 BBs) transformed into a switch statement. gcc/i386.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.c:16393) with 24 conditions (24 BBs) transformed into a switch statement. gcc/i386.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.c:16405) with 3 conditions (2 BBs) transformed into a switch statement. gcc/i386.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.c:1858) with 4 conditions (2 BBs) transformed into a switch statement. gcc/i386.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.c:19001) with 12 conditions (10 BBs) transformed into a switch statement. gcc/i386.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.c:19010) with 8 conditions (4 BBs) transformed into a switch statement. gcc/i386.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.c:19016) with 16 conditions (16 BBs) transformed into a switch statement. gcc/i386.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.c:19040) with 8 conditions (8 BBs) transformed into a switch statement. gcc/i386.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.c:19198) with 5 conditions (5 BBs) transformed into a switch statement. gcc/i386.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.c:19199) with 6 conditions (5 BBs) transformed into a switch statement. gcc/i386.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.c:19628) with 3 conditions (2 BBs) transformed into a switch statement. gcc/i386.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.c:19644) with 3 conditions (2 BBs) transformed into a switch statement. gcc/i386.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.c:20961) with 6 conditions (5 BBs) transformed into a switch statement. gcc/i386.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.c:20963) with 5 conditions (5 BBs) transformed into a switch statement. gcc/i386.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.c:2622) with 3 conditions (2 BBs) transformed into a switch statement. gcc/i386.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.c:2884) with 14 conditions (14 BBs) transformed into a switch statement. gcc/i386.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.c:3328) with 22 conditions (22 BBs) transformed into a switch statement. gcc/i386.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.c:9860) with 3 conditions (3 BBs) transformed into a switch statement. gcc/i386-expand.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386-expand.c:16909) with 5 conditions (5 BBs) transformed into a switch statement. gcc/i386-expand.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386-expand.c:19452) with 4 conditions (4 BBs) transformed into a switch statement. gcc/i386-expand.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386-expand.c:2706) with 9 conditions (5 BBs) transformed into a switch statement. gcc/i386-expand.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386-expand.c:380) with 22 conditions (22 BBs) transformed into a switch statement. gcc/i386-expand.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386-expand.c:401) with 22 conditions (22 BBs) transformed into a switch statement. gcc/i386-expand.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386-expand.c:4573) with 3 conditions (3 BBs) transformed into a switch statement. gcc/ifcvt.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/ifcvt.c:237) with 3 conditions (2 BBs) transformed into a switch statement. gcc/insn-attrtab.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:1113) with 5 conditions (3 BBs) transformed into a switch statement. gcc/insn-attrtab.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:14363) with 4 conditions (3 BBs) transformed into a switch statement. gcc/insn-attrtab.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:1551) with 5 conditions (5 BBs) transformed into a switch statement. gcc/insn-attrtab.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:1906) with 4 conditions (3 BBs) transformed into a switch statement. gcc/insn-attrtab.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:19163) with 6 conditions (6 BBs) transformed into a switch statement. gcc/insn-attrtab.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:19390) with 5 conditions (5 BBs) transformed into a switch statement. gcc/insn-attrtab.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:2295) with 3 conditions (2 BBs) transformed into a switch statement. gcc/insn-attrtab.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:2976) with 13 conditions (10 BBs) transformed into a switch statement. gcc/insn-attrtab.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:4524) with 5 conditions (5 BBs) transformed into a switch statement. gcc/insn-attrtab.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:4559) with 5 conditions (5 BBs) transformed into a switch statement. gcc/insn-attrtab.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:503) with 3 conditions (2 BBs) transformed into a switch statement. gcc/insn-attrtab.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:557) with 5 conditions (3 BBs) transformed into a switch statement. gcc/insn-attrtab.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:5893) with 5 conditions (5 BBs) transformed into a switch statement. gcc/insn-attrtab.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:5992) with 7 conditions (7 BBs) transformed into a switch statement. gcc/insn-attrtab.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:872) with 7 conditions (7 BBs) transformed into a switch statement. gcc/insn-attrtab.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:910) with 4 conditions (2 BBs) transformed into a switch statement. gcc/insn-attrtab.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:910) with 4 conditions (2 BBs) transformed into a switch statement. gcc/insn-attrtab.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:922) with 6 conditions (6 BBs) transformed into a switch statement. gcc/insn-attrtab.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/sse.md:20700) with 31 conditions (31 BBs) transformed into a switch statement. gcc/insn-attrtab.c.043t.iftoswitch:Condition chain (at insn-attrtab.c:82) with 22 conditions (22 BBs) transformed into a switch statement. gcc/insn-dfatab.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:15509) with 4 conditions (2 BBs) transformed into a switch statement. gcc/insn-dfatab.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:16158) with 7 conditions (7 BBs) transformed into a switch statement. gcc/insn-dfatab.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:16158) with 7 conditions (7 BBs) transformed into a switch statement. gcc/insn-dfatab.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:16171) with 7 conditions (7 BBs) transformed into a switch statement. gcc/insn-dfatab.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:16171) with 7 conditions (7 BBs) transformed into a switch statement. gcc/insn-dfatab.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:16391) with 5 conditions (5 BBs) transformed into a switch statement. gcc/insn-dfatab.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:20649) with 5 conditions (5 BBs) transformed into a switch statement. gcc/insn-dfatab.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:2453) with 14 conditions (8 BBs) transformed into a switch statement. gcc/insn-dfatab.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:26034) with 5 conditions (5 BBs) transformed into a switch statement. gcc/insn-dfatab.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:3326) with 5 conditions (3 BBs) transformed into a switch statement. gcc/insn-latencytab.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:15656) with 4 conditions (2 BBs) transformed into a switch statement. gcc/insn-latencytab.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:16860) with 7 conditions (7 BBs) transformed into a switch statement. gcc/insn-latencytab.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:16860) with 7 conditions (7 BBs) transformed into a switch statement. gcc/insn-latencytab.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:16913) with 7 conditions (7 BBs) transformed into a switch statement. gcc/insn-latencytab.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:16913) with 7 conditions (7 BBs) transformed into a switch statement. gcc/insn-latencytab.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:17089) with 5 conditions (5 BBs) transformed into a switch statement. gcc/insn-latencytab.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:20655) with 5 conditions (5 BBs) transformed into a switch statement. gcc/insn-latencytab.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:2398) with 14 conditions (8 BBs) transformed into a switch statement. gcc/insn-latencytab.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:25945) with 5 conditions (5 BBs) transformed into a switch statement. gcc/insn-latencytab.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:3307) with 5 conditions (3 BBs) transformed into a switch statement. gcc/insn-output.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/sse.md:1067) with 4 conditions (4 BBs) transformed into a switch statement. gcc/insn-output.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/sse.md:1067) with 4 conditions (4 BBs) transformed into a switch statement. gcc/insn-output.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/sse.md:1067) with 4 conditions (4 BBs) transformed into a switch statement. gcc/insn-output.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/sse.md:1067) with 4 conditions (4 BBs) transformed into a switch statement. gcc/insn-output.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/sse.md:1067) with 4 conditions (4 BBs) transformed into a switch statement. gcc/insn-output.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/sse.md:1067) with 4 conditions (4 BBs) transformed into a switch statement. gcc/insn-output.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/sse.md:1067) with 4 conditions (4 BBs) transformed into a switch statement. gcc/insn-output.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/sse.md:1067) with 4 conditions (4 BBs) transformed into a switch statement. gcc/insn-output.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/sse.md:1067) with 4 conditions (4 BBs) transformed into a switch statement. gcc/insn-output.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/sse.md:1067) with 4 conditions (4 BBs) transformed into a switch statement. gcc/insn-output.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/sse.md:1067) with 4 conditions (4 BBs) transformed into a switch statement. gcc/insn-output.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/sse.md:1067) with 4 conditions (4 BBs) transformed into a switch statement. gcc/insn-output.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/sse.md:1185) with 4 conditions (4 BBs) transformed into a switch statement. gcc/insn-output.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/sse.md:1185) with 4 conditions (4 BBs) transformed into a switch statement. gcc/insn-output.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/sse.md:1185) with 4 conditions (4 BBs) transformed into a switch statement. gcc/insn-output.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/sse.md:1185) with 4 conditions (4 BBs) transformed into a switch statement. gcc/insn-output.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/sse.md:1185) with 4 conditions (4 BBs) transformed into a switch statement. gcc/insn-output.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/sse.md:1185) with 4 conditions (4 BBs) transformed into a switch statement. gcc/insn-output.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/sse.md:1185) with 4 conditions (4 BBs) transformed into a switch statement. gcc/insn-output.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/sse.md:1185) with 4 conditions (4 BBs) transformed into a switch statement. gcc/insn-output.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/sse.md:1185) with 4 conditions (4 BBs) transformed into a switch statement. gcc/insn-output.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/sse.md:1185) with 4 conditions (4 BBs) transformed into a switch statement. gcc/insn-output.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/sse.md:1185) with 4 conditions (4 BBs) transformed into a switch statement. gcc/insn-output.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/sse.md:1185) with 4 conditions (4 BBs) transformed into a switch statement. gcc/insn-preds.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/predicates.md:1292) with 3 conditions (3 BBs) transformed into a switch statement. gcc/insn-preds.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/predicates.md:1313) with 5 conditions (5 BBs) transformed into a switch statement. gcc/insn-preds.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/predicates.md:1353) with 3 conditions (3 BBs) transformed into a switch statement. gcc/insn-preds.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/predicates.md:1737) with 9 conditions (9 BBs) transformed into a switch statement. gcc/insn-preds.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/predicates.md:1809) with 10 conditions (10 BBs) transformed into a switch statement. gcc/insn-preds.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/predicates.md:818) with 3 conditions (2 BBs) transformed into a switch statement. gcc/insn-preds.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/predicates.md:842) with 3 conditions (2 BBs) transformed into a switch statement. gcc/insn-preds.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/predicates.md:850) with 3 conditions (2 BBs) transformed into a switch statement. gcc/ipa.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/cgraph.h:2791) with 3 conditions (2 BBs) transformed into a switch statement. gcc/ipa-fnsummary.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/ipa-fnsummary.c:1248) with 4 conditions (2 BBs) transformed into a switch statement. gcc/ipa-icf-gimple.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/ipa-icf-gimple.c:151) with 3 conditions (2 BBs) transformed into a switch statement. gcc/ipa-inline-analysis.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/cgraph.h:2791) with 3 conditions (2 BBs) transformed into a switch statement. gcc/ipa-inline-transform.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/cgraph.h:2791) with 3 conditions (2 BBs) transformed into a switch statement. gcc/ipa-param-manipulation.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/gimple.h:2877) with 4 conditions (2 BBs) transformed into a switch statement. gcc/ipa-utils.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/ipa-utils.c:367) with 4 conditions (3 BBs) transformed into a switch statement. gcc/ipa-visibility.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/cgraph.h:2791) with 3 conditions (2 BBs) transformed into a switch statement. gcc/ira-build.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/ira-build.c:1839) with 8 conditions (6 BBs) transformed into a switch statement. gcc/jump.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/jump.c:709) with 5 conditions (3 BBs) transformed into a switch statement. gcc/jump.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/jump.c:720) with 4 conditions (2 BBs) transformed into a switch statement. gcc/jump.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/jump.c:730) with 4 conditions (2 BBs) transformed into a switch statement. gcc/loop-invariant.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/loop-invariant.c:329) with 5 conditions (5 BBs) transformed into a switch statement. gcc/loop-invariant.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/loop-invariant.c:397) with 5 conditions (5 BBs) transformed into a switch statement. gcc/lra-constraints.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/lra-constraints.c:4167) with 3 conditions (3 BBs) transformed into a switch statement. gcc/lra-constraints.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/lra-constraints.c:4275) with 3 conditions (2 BBs) transformed into a switch statement. gcc/lto/lto-common.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/lto/lto-common.c:1196) with 3 conditions (2 BBs) transformed into a switch statement. gcc/lto/lto-common.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/lto/lto-common.c:1411) with 4 conditions (2 BBs) transformed into a switch statement. gcc/lto/lto-partition.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/cgraph.h:2791) with 3 conditions (2 BBs) transformed into a switch statement. gcc/lto-streamer-in.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/lto-streamer-in.c:1535) with 5 conditions (5 BBs) transformed into a switch statement. gcc/lto-streamer-out.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/lto-streamer-out.c:1216) with 3 conditions (2 BBs) transformed into a switch statement. gcc/omp-expand.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/omp-expand.c:1828) with 4 conditions (4 BBs) transformed into a switch statement. gcc/omp-expand.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/omp-expand.c:1920) with 4 conditions (4 BBs) transformed into a switch statement. gcc/omp-expand.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/omp-expand.c:1934) with 4 conditions (4 BBs) transformed into a switch statement. gcc/omp-expand.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/omp-expand.c:3809) with 4 conditions (4 BBs) transformed into a switch statement. gcc/omp-expand.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/omp-expand.c:3826) with 4 conditions (4 BBs) transformed into a switch statement. gcc/omp-expand.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/omp-expand.c:6689) with 4 conditions (3 BBs) transformed into a switch statement. gcc/omp-expand.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/omp-expand.c:7179) with 4 conditions (4 BBs) transformed into a switch statement. gcc/omp-low.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/omp-low.c:12888) with 6 conditions (6 BBs) transformed into a switch statement. gcc/omp-low.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/omp-low.c:637) with 3 conditions (3 BBs) transformed into a switch statement. gcc/optabs.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/optabs.c:1339) with 3 conditions (2 BBs) transformed into a switch statement. gcc/optabs.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/optabs-query.h:89) with 3 conditions (2 BBs) transformed into a switch statement. gcc/optabs-libfuncs.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/optabs-libfuncs.c:322) with 4 conditions (3 BBs) transformed into a switch statement. gcc/optabs-libfuncs.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/optabs-libfuncs.c:348) with 4 conditions (3 BBs) transformed into a switch statement. gcc/optabs-libfuncs.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/optabs-libfuncs.c:361) with 4 conditions (3 BBs) transformed into a switch statement. gcc/optabs-libfuncs.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/optabs-query.h:89) with 3 conditions (2 BBs) transformed into a switch statement. gcc/opts-common.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/opts-common.c:1720) with 3 conditions (3 BBs) transformed into a switch statement. gcc/opts-common.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/opts-common.c:384) with 4 conditions (4 BBs) transformed into a switch statement. gcc/predict.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/gimple.h:2877) with 4 conditions (2 BBs) transformed into a switch statement. gcc/print-rtl.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/print-rtl.c:512) with 5 conditions (5 BBs) transformed into a switch statement. gcc/read-md.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/read-md.c:467) with 6 conditions (3 BBs) transformed into a switch statement. gcc/read-rtl-function.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/read-rtl-function.c:1400) with 10 conditions (10 BBs) transformed into a switch statement. gcc/recog.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/recog.c:1853) with 4 conditions (2 BBs) transformed into a switch statement. gcc/reg-stack.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/reg-stack.c:1567) with 3 conditions (2 BBs) transformed into a switch statement. gcc/reload1.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/reload1.c:1448) with 3 conditions (3 BBs) transformed into a switch statement. gcc/reload1.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/reload1.c:1573) with 3 conditions (2 BBs) transformed into a switch statement. gcc/reload1.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/reload1.c:5565) with 3 conditions (2 BBs) transformed into a switch statement. gcc/reload1.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/reload1.c:5625) with 4 conditions (2 BBs) transformed into a switch statement. gcc/reload1.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/reload1.c:6616) with 3 conditions (3 BBs) transformed into a switch statement. gcc/reload1.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/reload1.c:8460) with 3 conditions (2 BBs) transformed into a switch statement. gcc/reload.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/reload.c:1228) with 3 conditions (2 BBs) transformed into a switch statement. gcc/reload.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/reload.c:6536) with 6 conditions (5 BBs) transformed into a switch statement. gcc/rtlanal.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/rtlanal.c:1732) with 3 conditions (2 BBs) transformed into a switch statement. gcc/rtlanal.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/rtlanal.c:3475) with 5 conditions (5 BBs) transformed into a switch statement. gcc/rtlanal.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/rtlanal.c:5899) with 4 conditions (3 BBs) transformed into a switch statement. gcc/sanopt.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/sanopt.c:520) with 3 conditions (3 BBs) transformed into a switch statement. gcc/symtab.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/cgraph.h:2791) with 3 conditions (2 BBs) transformed into a switch statement. gcc/toplev.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/toplev.c:2221) with 4 conditions (3 BBs) transformed into a switch statement. gcc/trans-mem.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/trans-mem.c:375) with 10 conditions (5 BBs) transformed into a switch statement. gcc/trans-mem.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/trans-mem.c:421) with 10 conditions (5 BBs) transformed into a switch statement. gcc/trans-mem.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/trans-mem.c:588) with 4 conditions (3 BBs) transformed into a switch statement. gcc/tree.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/tree.c:10819) with 6 conditions (6 BBs) transformed into a switch statement. gcc/tree.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/tree.c:4265) with 5 conditions (4 BBs) transformed into a switch statement. gcc/tree.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/tree.c:4278) with 5 conditions (4 BBs) transformed into a switch statement. gcc/tree.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/tree.c:5069) with 3 conditions (2 BBs) transformed into a switch statement. gcc/tree.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/tree.c:5737) with 5 conditions (5 BBs) transformed into a switch statement. gcc/tree-cfg.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/gimple-expr.h:87) with 4 conditions (3 BBs) transformed into a switch statement. gcc/tree-cfg.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/tree-cfg.c:5281) with 3 conditions (2 BBs) transformed into a switch statement. gcc/tree-cfg.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/tree-cfg.c:6792) with 4 conditions (3 BBs) transformed into a switch statement. gcc/tree-chrec.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/tree-chrec.c:948) with 8 conditions (7 BBs) transformed into a switch statement. gcc/tree-data-ref.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/tree-data-ref.c:714) with 3 conditions (2 BBs) transformed into a switch statement. gcc/tree-nested.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/tree-nested.c:1767) with 3 conditions (2 BBs) transformed into a switch statement. gcc/tree-nested.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/tree-nested.c:3027) with 3 conditions (2 BBs) transformed into a switch statement. gcc/tree-nested.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/tree-nested.c:999) with 3 conditions (2 BBs) transformed into a switch statement. gcc/tree-ssa-address.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/tree-ssa-address.c:1038) with 3 conditions (2 BBs) transformed into a switch statement. gcc/tree-ssa-alias.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/tree-ssa-alias.c:3154) with 4 conditions (3 BBs) transformed into a switch statement. gcc/tree-ssa-alias.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/tree-ssa-alias.c:3155) with 4 conditions (3 BBs) transformed into a switch statement. gcc/tree-ssa-alias.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/tree-ssa-alias.c:371) with 3 conditions (2 BBs) transformed into a switch statement. gcc/tree-ssa-alias.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/tree-ssa-alias.c:383) with 3 conditions (2 BBs) transformed into a switch statement. gcc/tree-ssa.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/tree-ssa.c:1002) with 3 conditions (2 BBs) transformed into a switch statement. gcc/tree-ssa-dce.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/tree-ssa-dce.c:960) with 13 conditions (13 BBs) transformed into a switch statement. gcc/tree-ssa-forwprop.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/gimple.h:2877) with 4 conditions (2 BBs) transformed into a switch statement. gcc/tree-ssa-loop-ivopts.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/gimple-expr.h:87) with 4 conditions (3 BBs) transformed into a switch statement. gcc/tree-ssa-loop-ivopts.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/tree-ssa-loop-ivopts.c:4322) with 4 conditions (4 BBs) transformed into a switch statement. gcc/tree-ssa-phiopt.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/gimple.h:2877) with 4 conditions (2 BBs) transformed into a switch statement. gcc/tree-ssa-propagate.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/gimple-expr.h:87) with 4 conditions (3 BBs) transformed into a switch statement. gcc/tree-ssa-reassoc.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/gimple.h:2877) with 4 conditions (2 BBs) transformed into a switch statement. gcc/tree-ssa-strlen.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/gimple.h:2877) with 4 conditions (2 BBs) transformed into a switch statement. gcc/tree-ssa-structalias.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/tree-ssa-structalias.c:6533) with 3 conditions (2 BBs) transformed into a switch statement. gcc/tree-ssa-structalias.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/tree-ssa-structalias.c:6624) with 6 conditions (6 BBs) transformed into a switch statement. gcc/tree-ssa-threadbackward.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/tree-ssa-threadbackward.c:84) with 3 conditions (2 BBs) transformed into a switch statement. gcc/tree-ssa-threadedge.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/tree-ssa-threadedge.c:1096) with 3 conditions (3 BBs) transformed into a switch statement. gcc/tree-stdarg.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/gimple.h:2877) with 4 conditions (2 BBs) transformed into a switch statement. gcc/tree-streamer-in.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/tree-streamer-in.c:272) with 3 conditions (2 BBs) transformed into a switch statement. gcc/tree-streamer-out.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/tree-streamer-out.c:235) with 3 conditions (2 BBs) transformed into a switch statement. gcc/tree-tailcall.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/gimple.h:2877) with 4 conditions (2 BBs) transformed into a switch statement. gcc/tree-tailcall.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/tree-tailcall.c:444) with 4 conditions (4 BBs) transformed into a switch statement. gcc/tree-vect-data-refs.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/gimple.h:2877) with 4 conditions (2 BBs) transformed into a switch statement. gcc/tree-vect-data-refs.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/tree-vect-data-refs.c:135) with 5 conditions (5 BBs) transformed into a switch statement. gcc/tree-vect-generic.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/tree-vect-generic.c:1619) with 4 conditions (3 BBs) transformed into a switch statement. gcc/tree-vect-patterns.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/gimple.h:2877) with 4 conditions (2 BBs) transformed into a switch statement. gcc/tree-vect-stmts.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/gimple.h:2877) with 4 conditions (2 BBs) transformed into a switch statement. gcc/tree-vrp.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/gimple.h:2877) with 4 conditions (2 BBs) transformed into a switch statement. gcc/ubsan.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/gimple.h:2877) with 4 conditions (2 BBs) transformed into a switch statement. gcc/ubsan.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/ubsan.c:1452) with 3 conditions (2 BBs) transformed into a switch statement. gcc/ubsan.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/ubsan.c:2162) with 4 conditions (3 BBs) transformed into a switch statement. gcc/varpool.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/cgraph.h:2791) with 3 conditions (2 BBs) transformed into a switch statement. gcc/vr-values.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/gcc/vr-values.c:2232) with 3 conditions (2 BBs) transformed into a switch statement. libbacktrace/dwarf.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/libbacktrace/dwarf.c:3218) with 3 conditions (2 BBs) transformed into a switch statement. libbacktrace/.libs/dwarf.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/libbacktrace/dwarf.c:3218) with 3 conditions (2 BBs) transformed into a switch statement. libcpp/expr.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/libcpp/expr.c:371) with 5 conditions (5 BBs) transformed into a switch statement. libcpp/expr.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/libcpp/expr.c:391) with 5 conditions (5 BBs) transformed into a switch statement. libcpp/expr.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/libcpp/expr.c:411) with 5 conditions (5 BBs) transformed into a switch statement. libcpp/expr.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/libcpp/expr.c:431) with 5 conditions (5 BBs) transformed into a switch statement. libcpp/init.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/libcpp/init.c:553) with 8 conditions (8 BBs) transformed into a switch statement. libcpp/lex.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/libcpp/lex.c:1856) with 27 conditions (14 BBs) transformed into a switch statement. libcpp/lex.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/libcpp/lex.c:3512) with 3 conditions (2 BBs) transformed into a switch statement. libcpp/lex.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/libcpp/lex.c:4147) with 3 conditions (2 BBs) transformed into a switch statement. libcpp/lex.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/libcpp/lex.c:4185) with 4 conditions (2 BBs) transformed into a switch statement. libcpp/macro.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/libcpp/macro.c:1164) with 6 conditions (6 BBs) transformed into a switch statement. libcpp/traditional.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/libcpp/traditional.c:492) with 3 conditions (3 BBs) transformed into a switch statement. libdecnumber/decContext.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/libdecnumber/decContext.c:357) with 14 conditions (14 BBs) transformed into a switch statement. libdecnumber/decNumber.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/libdecnumber/decNumber.c:3322) with 10 conditions (10 BBs) transformed into a switch statement. libiberty/argv.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/libiberty/argv.c:315) with 3 conditions (2 BBs) transformed into a switch statement. libiberty/cp-demangle.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/libiberty/cp-demangle.c:1776) with 3 conditions (2 BBs) transformed into a switch statement. libiberty/cp-demangle.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/libiberty/cp-demangle.c:4699) with 3 conditions (2 BBs) transformed into a switch statement. libiberty/cp-demangle.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/libiberty/cp-demangle.c:6356) with 3 conditions (2 BBs) transformed into a switch statement. libiberty/pic/argv.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/libiberty/argv.c:315) with 3 conditions (2 BBs) transformed into a switch statement. libiberty/pic/cp-demangle.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/libiberty/cp-demangle.c:1776) with 3 conditions (2 BBs) transformed into a switch statement. libiberty/pic/cp-demangle.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/libiberty/cp-demangle.c:4699) with 3 conditions (2 BBs) transformed into a switch statement. libiberty/pic/cp-demangle.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/libiberty/cp-demangle.c:6356) with 3 conditions (2 BBs) transformed into a switch statement. libiberty/pic/rust-demangle.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/libiberty/rust-demangle.c:368) with 3 conditions (2 BBs) transformed into a switch statement. libiberty/rust-demangle.c.043t.iftoswitch:Condition chain (at /home/marxin/Programming/gcc2/libiberty/rust-demangle.c:368) with 3 conditions (2 BBs) transformed into a switch statement. [-- Attachment #3: 0001-Add-if-chain-to-switch-conversion-pass.patch --] [-- Type: text/x-patch, Size: 37987 bytes --] From 1b0b511bc57d1565c768bc1f424e7126fa9fa905 Mon Sep 17 00:00:00 2001 From: Martin Liska <mliska@suse.cz> Date: Fri, 28 Aug 2020 10:26:13 +0200 Subject: [PATCH] Add if-chain to switch conversion pass. gcc/ChangeLog: * Makefile.in: Add new gimple-if-to-switch.o. * common.opt: Add new option. * dbgcnt.def (DEBUG_COUNTER): Add new debug counter. * doc/invoke.texi: * opts.c: * passes.def: Register new pass. * timevar.def (TV_TREE_IF_TO_SWITCH): Add new time variable. * tree-pass.h (make_pass_if_to_switch): New. * tree-switch-conversion.h: New file. * gimple-if-to-switch.c: New file. gcc/testsuite/ChangeLog: * gcc.dg/tree-ssa/reassoc-32.c: * gcc.dg/tree-ssa/if-to-switch-1.c: New test. * gcc.dg/tree-ssa/if-to-switch-2.c: New test. * gcc.dg/tree-ssa/if-to-switch-3.c: New test. * gcc.dg/tree-ssa/if-to-switch-4.c: New test. * gcc.dg/tree-ssa/if-to-switch-5.c: New test. * gcc.dg/tree-ssa/if-to-switch-6.c: New test. * gcc.dg/tree-ssa/if-to-switch-7.c: New test. * gcc.dg/tree-ssa/if-to-switch-8.c: New test. --- gcc/Makefile.in | 1 + gcc/common.opt | 4 + gcc/dbgcnt.def | 1 + gcc/doc/invoke.texi | 13 +- gcc/gimple-if-to-switch.c | 762 ++++++++++++++++++ gcc/opts.c | 1 + gcc/passes.def | 1 + .../gcc.dg/tree-ssa/if-to-switch-1.c | 35 + .../gcc.dg/tree-ssa/if-to-switch-2.c | 11 + .../gcc.dg/tree-ssa/if-to-switch-3.c | 11 + .../gcc.dg/tree-ssa/if-to-switch-4.c | 36 + .../gcc.dg/tree-ssa/if-to-switch-5.c | 12 + .../gcc.dg/tree-ssa/if-to-switch-6.c | 42 + .../gcc.dg/tree-ssa/if-to-switch-7.c | 25 + .../gcc.dg/tree-ssa/if-to-switch-8.c | 27 + gcc/testsuite/gcc.dg/tree-ssa/reassoc-32.c | 2 +- gcc/timevar.def | 1 + gcc/tree-pass.h | 1 + gcc/tree-switch-conversion.h | 15 +- 19 files changed, 993 insertions(+), 8 deletions(-) create mode 100644 gcc/gimple-if-to-switch.c create mode 100644 gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-1.c create mode 100644 gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-2.c create mode 100644 gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-3.c create mode 100644 gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-4.c create mode 100644 gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-5.c create mode 100644 gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-6.c create mode 100644 gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-7.c create mode 100644 gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-8.c diff --git a/gcc/Makefile.in b/gcc/Makefile.in index 79e854aa938..782e9cfe95b 100644 --- a/gcc/Makefile.in +++ b/gcc/Makefile.in @@ -1361,6 +1361,7 @@ OBJS = \ gimple-array-bounds.o \ gimple-builder.o \ gimple-expr.o \ + gimple-if-to-switch.o \ gimple-iterator.o \ gimple-fold.o \ gimple-laddress.o \ diff --git a/gcc/common.opt b/gcc/common.opt index dd68c61ae1d..80e60934f22 100644 --- a/gcc/common.opt +++ b/gcc/common.opt @@ -1173,6 +1173,10 @@ fconserve-stack Common Var(flag_conserve_stack) Optimization Do not perform optimizations increasing noticeably stack usage. +fconvert-if-to-switch +Common Report Var(flag_convert_if_to_switch) Optimization +Perform conversions of if-elseif chain into a switch statement. + fcprop-registers Common Report Var(flag_cprop_registers) Optimization Perform a register copy-propagation optimization pass. diff --git a/gcc/dbgcnt.def b/gcc/dbgcnt.def index cf8775b2b66..e393e45deb4 100644 --- a/gcc/dbgcnt.def +++ b/gcc/dbgcnt.def @@ -170,6 +170,7 @@ DEBUG_COUNTER (if_after_combine) DEBUG_COUNTER (if_after_reload) DEBUG_COUNTER (if_conversion) DEBUG_COUNTER (if_conversion_tree) +DEBUG_COUNTER (if_to_switch) DEBUG_COUNTER (ipa_cp_bits) DEBUG_COUNTER (ipa_sra_params) DEBUG_COUNTER (ipa_sra_retvalues) diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi index 5d29a7fa23c..fcaf993e2c2 100644 --- a/gcc/doc/invoke.texi +++ b/gcc/doc/invoke.texi @@ -467,7 +467,7 @@ Objective-C and Objective-C++ Dialects}. -fassociative-math -fauto-profile -fauto-profile[=@var{path}] @gol -fauto-inc-dec -fbranch-probabilities @gol -fcaller-saves @gol --fcombine-stack-adjustments -fconserve-stack @gol +-fcombine-stack-adjustments -fconserve-stack -fconvert-if-to-switch @gol -fcompare-elim -fcprop-registers -fcrossjumping @gol -fcse-follow-jumps -fcse-skip-blocks -fcx-fortran-rules @gol -fcx-limited-range @gol @@ -534,7 +534,7 @@ Objective-C and Objective-C++ Dialects}. -fthread-jumps -ftracer -ftree-bit-ccp @gol -ftree-builtin-call-dce -ftree-ccp -ftree-ch @gol -ftree-coalesce-vars -ftree-copy-prop -ftree-dce -ftree-dominator-opts @gol --ftree-dse -ftree-forwprop -ftree-fre -fcode-hoisting @gol +-ftree-dse -ftree-forwprop -ftree-fre -fcode-hoisting @gol -ftree-loop-if-convert -ftree-loop-im @gol -ftree-phiprop -ftree-loop-distribution -ftree-loop-distribute-patterns @gol -ftree-loop-ivcanon -ftree-loop-linear -ftree-loop-optimize @gol @@ -2648,6 +2648,14 @@ Allow conditional expressions with mismatched types in the second and third arguments. The value of such an expression is void. This option is not supported for C++. +@item -fconvert-if-to-switch +@opindex fconvert-if-to-switch +Perform conversion of an if cascade into a switch statement. +Do so if the switch can be later transformed using a jump table +or a bit test. The transformation can help to produce faster code for +the switch statement. This flag is enabled by default +at @option{-O2} and higher. + @item -flax-vector-conversions @opindex flax-vector-conversions Allow implicit conversions between vectors with differing numbers of @@ -9581,6 +9589,7 @@ also turns on the following optimization flags: -falign-labels -falign-loops @gol -fcaller-saves @gol -fcode-hoisting @gol +-fconvert-if-to-switch @gol -fcrossjumping @gol -fcse-follow-jumps -fcse-skip-blocks @gol -fdelete-null-pointer-checks @gol diff --git a/gcc/gimple-if-to-switch.c b/gcc/gimple-if-to-switch.c new file mode 100644 index 00000000000..d67099cd614 --- /dev/null +++ b/gcc/gimple-if-to-switch.c @@ -0,0 +1,762 @@ +/* If-elseif-else to switch conversion pass + Copyright (C) 2020 Free Software Foundation, Inc. + +This file is part of GCC. + +GCC is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 3, or (at your option) +any later version. + +GCC is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GCC; see the file COPYING3. If not see +<http://www.gnu.org/licenses/>. */ + +/* Algorithm of the pass runs in the following steps: + a) We walk basic blocks in DOMINATOR order so that we first reach + a first condition of a future switch. + b) We follow false edges of a if-else-chain and we record chain + of GIMPLE conditions. These blocks are only used for comparison + of a common SSA_NAME and we do not allow any side effect. + c) We remove all basic blocks (except first) of such chain and + GIMPLE switch replaces the condition in the first basic block. + d) We move all GIMPLE statements in the removed blocks into the + first one. */ + +#include "config.h" +#include "system.h" +#include "coretypes.h" +#include "backend.h" +#include "rtl.h" +#include "tree.h" +#include "gimple.h" +#include "tree-pass.h" +#include "ssa.h" +#include "gimple-pretty-print.h" +#include "fold-const.h" +#include "gimple-iterator.h" +#include "tree-cfg.h" +#include "tree-dfa.h" +#include "tree-cfgcleanup.h" +#include "alias.h" +#include "tree-ssa-loop.h" +#include "diagnostic.h" +#include "cfghooks.h" +#include "tree-into-ssa.h" +#include "cfganal.h" +#include "dbgcnt.h" +#include "target.h" +#include "alloc-pool.h" +#include "tree-switch-conversion.h" + +using namespace tree_switch_conversion; + +/* Tuple that holds minimum and maximum values in a case. */ + +struct case_range +{ + /* Default constructor. */ + case_range (): + m_min (NULL_TREE), m_max (NULL_TREE) + {} + + case_range (tree min, tree max): + m_min (min), m_max (max) + {} + + /* Minimum case value. */ + tree m_min; + /* Maximum case value. */ + tree m_max; +}; + +/* One entry of a if chain. */ + +struct if_chain_entry +{ + /* Constructor. */ + if_chain_entry (basic_block bb, edge true_edge, edge false_edge) + : m_case_values (), m_bb (bb), + m_true_edge (true_edge), m_false_edge (false_edge) + { + m_case_values.create (2); + } + + /* Vector of at maximum 2 case ranges. */ + vec<case_range> m_case_values; + /* Basic block of the original condition. */ + basic_block m_bb; + /* True edge of the gimple condition. */ + edge m_true_edge; + /* False edge of the gimple condition. */ + edge m_false_edge; +}; + +/* Master structure for one if to switch conversion candidate. */ + +struct if_chain +{ + /* Default constructor. */ + if_chain(): + m_first_condition (NULL), m_index (NULL_TREE), m_entries (), + m_phi_map () + { + m_entries.create (2); + } + + /* Default destructor. */ + ~if_chain () + { + m_entries.release (); + } + + /* Set index and check that it is not a different one. */ + bool set_and_check_index (tree index); + + /* Verify that all case ranges do not overlap. */ + bool check_non_overlapping_cases (); + + /* Return true when the switch can be expanded with a jump table or + a bit test (at least partially). */ + bool is_beneficial (); + + /* Record PHI arguments of a given edge E and return true + if GIMPLE switch creation will violate a PHI node. */ + bool record_phi_arguments (edge e); + + /* First condition of the chain. */ + gcond *m_first_condition; + /* Switch index. */ + tree m_index; + /* If chain entries. */ + vec<if_chain_entry> m_entries; + /* PHI map that is later used for reconstruction of PHI nodes. */ + hash_map<gphi *, tree> m_phi_map; +}; + +bool +if_chain::set_and_check_index (tree index) +{ + if (TREE_CODE (index) != SSA_NAME || !INTEGRAL_TYPE_P (TREE_TYPE (index))) + return false; + + if (m_index == NULL) + m_index = index; + + return index == m_index; +} + +/* Compare two case ranges by minimum value. */ + +static int +range_cmp (const void *a, const void *b) +{ + const case_range *cr1 = *(const case_range * const *) a; + const case_range *cr2 = *(const case_range * const *) b; + + return tree_int_cst_compare (cr1->m_min, cr2->m_min); +} + +bool +if_chain::check_non_overlapping_cases () +{ + auto_vec<case_range *> all_ranges; + for (unsigned i = 0; i < m_entries.length (); i++) + for (unsigned j = 0; j < m_entries[i].m_case_values.length (); j++) + all_ranges.safe_push (&m_entries[i].m_case_values[j]); + + all_ranges.qsort (range_cmp); + + for (unsigned i = 0; i < all_ranges.length () - 1; i++) + { + case_range *left = all_ranges[i]; + case_range *right = all_ranges[i + 1]; + if (tree_int_cst_le (left->m_min, right->m_min) + && tree_int_cst_le (right->m_min, left->m_max)) + return false; + } + + return true; +} + +/* Compare clusters by minimum value. */ + +static int +cluster_cmp (const void *a, const void *b) +{ + simple_cluster *sc1 = *(simple_cluster * const *) a; + simple_cluster *sc2 = *(simple_cluster * const *) b; + + return tree_int_cst_compare (sc1->get_low (), sc2->get_high ()); +} + +static void +dump_clusters (vec<cluster *> *clusters, const char *message) +{ + if (dump_file) + { + fprintf (dump_file, ";; %s: ", message); + for (unsigned i = 0; i < clusters->length (); i++) + (*clusters)[i]->dump (dump_file, dump_flags & TDF_DETAILS); + fprintf (dump_file, "\n"); + } +} + +/* Return true when the switch can be expanded with a jump table or + a bit test (at least partially). */ + +bool +if_chain::is_beneficial () +{ + profile_probability prob = profile_probability::uninitialized (); + + auto_vec<cluster *> clusters; + clusters.create (m_entries.length ()); + + for (unsigned i = 0; i < m_entries.length (); i++) + { + if_chain_entry *entry = &m_entries[i]; + for (unsigned j = 0; j < entry->m_case_values.length (); j++) + { + case_range *range = &entry->m_case_values[j]; + clusters.safe_push (new simple_cluster (range->m_min, range->m_max, + NULL_TREE, + entry->m_true_edge->dest, + prob)); + } + } + + /* Sort clusters and merge them. */ + auto_vec<cluster *> filtered_clusters; + filtered_clusters.create (16); + clusters.qsort (cluster_cmp); + simple_cluster *left = static_cast<simple_cluster *> (clusters[0]); + filtered_clusters.safe_push (left); + + for (unsigned i = 1; i < clusters.length (); i++) + { + simple_cluster *right = static_cast<simple_cluster *> (clusters[i]); + tree type = TREE_TYPE (left->get_low ()); + tree pos_one = build_int_cst (type, 1); + if (left->m_case_bb == right->m_case_bb) + { + tree next = int_const_binop (PLUS_EXPR, left->get_high (), pos_one); + if (tree_int_cst_equal (next, right->get_low ())) + { + left->set_high (right->get_high ()); + continue; + } + } + + left = static_cast<simple_cluster *> (clusters[i]); + filtered_clusters.safe_push (left); + } + + dump_clusters (&filtered_clusters, "Canonical GIMPLE case clusters"); + + vec<cluster *> output = jump_table_cluster::find_jump_tables (filtered_clusters); + bool r = output.length () < filtered_clusters.length (); + if (r) + dump_clusters (&output, "JT can be built"); + output.release (); + if (r) + return true; + + output = bit_test_cluster::find_bit_tests (filtered_clusters); + r = output.length () < filtered_clusters.length (); + if (r) + dump_clusters (&output, "BT can be built"); + output.release (); + return r; +} + +bool +if_chain::record_phi_arguments (edge e) +{ + for (gphi_iterator gsi = gsi_start_phis (e->dest); !gsi_end_p (gsi); + gsi_next (&gsi)) + { + gphi *phi = gsi.phi (); + if (!virtual_operand_p (gimple_phi_result (phi))) + { + tree arg = PHI_ARG_DEF_FROM_EDGE (phi, e); + tree *v = m_phi_map.get (phi); + if (v != NULL) + { + if (arg != *v) + return false; + } + else + m_phi_map.put (phi, arg); + } + } + + return true; +} + +/* Build case label with MIN and MAX values of a given basic block DEST. */ + +static tree +build_case_label (tree min, tree max, basic_block dest) +{ + tree label = gimple_block_label (dest); + return build_case_label (min, min == max ? NULL_TREE : max, label); +} + +/* Compare two integer constants. */ + +static int +label_cmp (const void *a, const void *b) +{ + const_tree l1 = *(const const_tree *) a; + const_tree l2 = *(const const_tree *) b; + + return tree_int_cst_compare (CASE_LOW (l1), CASE_LOW (l2)); +} + +/* Convert a given if CHAIN into a switch GIMPLE statement. */ + +static void +convert_if_conditions_to_switch (if_chain *chain) +{ + if (!dbg_cnt (if_to_switch)) + return; + + auto_vec<tree> labels; + if_chain_entry first_cond = chain->m_entries[0]; + + unsigned entries = chain->m_entries.length (); + edge default_edge = chain->m_entries[entries - 1].m_false_edge; + basic_block default_bb = default_edge->dest; + + gimple_stmt_iterator gsi = gsi_for_stmt (chain->m_first_condition); + for (unsigned i = 0; i < chain->m_entries.length (); i++) + { + if_chain_entry entry = chain->m_entries[i]; + + basic_block case_bb = entry.m_true_edge->dest; + + for (unsigned j = 0; j < entry.m_case_values.length (); j++) + labels.safe_push (build_case_label (entry.m_case_values[j].m_min, + entry.m_case_values[j].m_max, + case_bb)); + default_bb = entry.m_false_edge->dest; + + if (i == 0) + { + remove_edge (first_cond.m_true_edge); + remove_edge (first_cond.m_false_edge); + } + else + { + /* Move all statements from the BB to the BB with gswitch. */ + auto_vec<gimple *> stmts; + for (gimple_stmt_iterator gsi = gsi_start_bb (entry.m_bb); + !gsi_end_p (gsi); gsi_next (&gsi)) + { + gimple *stmt = gsi_stmt (gsi); + if (gimple_code (stmt) != GIMPLE_COND) + stmts.safe_push (stmt); + } + + for (unsigned i = 0; i < stmts.length (); i++) + { + gimple_stmt_iterator gsi_from = gsi_for_stmt (stmts[i]); + gsi_move_before (&gsi_from, &gsi); + } + + delete_basic_block (entry.m_bb); + } + + make_edge (first_cond.m_bb, case_bb, 0); + } + + labels.qsort (label_cmp); + + edge e = find_edge (first_cond.m_bb, default_bb); + if (e == NULL) + e = make_edge (first_cond.m_bb, default_bb, 0); + gswitch *s + = gimple_build_switch (chain->m_index, + build_case_label (NULL_TREE, NULL_TREE, default_bb), + labels); + + gsi_remove (&gsi, true); + gsi_insert_before (&gsi, s, GSI_NEW_STMT); + + if (dump_file) + { + fprintf (dump_file, "Expanded into a new gimple STMT: "); + print_gimple_stmt (dump_file, s, 0, TDF_SLIM); + putc ('\n', dump_file); + } + + /* Fill up missing PHI node arguments. */ + for (hash_map<gphi *, tree>::iterator it = chain->m_phi_map.begin (); + it != chain->m_phi_map.end (); ++it) + { + gphi *phi = (*it).first; + if (!virtual_operand_p (gimple_phi_result (phi))) + { + for (unsigned i = 0; i < gimple_phi_num_args (phi); i++) + { + if (gimple_phi_arg_def (phi, i) == NULL_TREE) + { + add_phi_arg (phi, (*it).second, gimple_phi_arg_edge (phi, i), + UNKNOWN_LOCATION); + break; + } + } + } + } +} + +static bool +extract_case_from_stmt (tree rhs1, tree rhs2, tree_code code, + if_chain *chain, if_chain_entry *entry, + unsigned *visited_stmt_count) +{ + tree index = NULL_TREE; + case_range range; + + if (code == EQ_EXPR) + { + /* Handle situation 2a: + _1 = aChar_8(D) == 1; */ + index = rhs1; + + /* We can meet a readonly type used for a constant. */ + rhs2 = fold_convert (TREE_TYPE (index), rhs2); + if (TREE_CODE (rhs2) != INTEGER_CST) + return false; + + range = case_range (rhs2, rhs2); + *visited_stmt_count += 1; + } + else if (code == LE_EXPR) + { + /* Handle situation 2b: + aChar.1_1 = (unsigned int) aChar_10(D); + _2 = aChar.1_1 + 4294967287; + _3 = _2 <= 1; */ + tree ssa = rhs1; + tree range_size = rhs2; + if (TREE_CODE (ssa) != SSA_NAME + || TREE_CODE (range_size) != INTEGER_CST) + return false; + + gassign *subtraction = dyn_cast<gassign *> (SSA_NAME_DEF_STMT (ssa)); + if (subtraction == NULL + || gimple_assign_rhs_code (subtraction) != PLUS_EXPR) + return false; + + tree casted = gimple_assign_rhs1 (subtraction); + tree min = gimple_assign_rhs2 (subtraction); + if (TREE_CODE (casted) != SSA_NAME + || TREE_CODE (min) != INTEGER_CST) + return false; + + if (!SSA_NAME_IS_DEFAULT_DEF (casted)) + { + gassign *to_unsigned + = dyn_cast<gassign *> (SSA_NAME_DEF_STMT (casted)); + if (to_unsigned == NULL + || !gimple_assign_unary_nop_p (to_unsigned) + || !TYPE_UNSIGNED (TREE_TYPE (casted))) + return false; + index = gimple_assign_rhs1 (to_unsigned); + ++(*visited_stmt_count); + } + else + index = casted; + + tree type = TREE_TYPE (index); + tree range_min = fold_convert (type, const_unop (NEGATE_EXPR, type, min)); + range = case_range (range_min, const_binop (PLUS_EXPR, type, range_min, + fold_convert (type, + range_size))); + *visited_stmt_count += 2; + } + else + return false; + + if (!chain->set_and_check_index (index)) + return false; + entry->m_case_values.safe_push (range); + + return true; +} + +static void +find_switch_in_bb (basic_block bb, auto_vec<if_chain *> *all_candidates, + auto_bitmap *visited_bbs) +{ + if_chain *chain = new if_chain (); + unsigned total_case_values = 0; + + while (true) + { + bool first = chain->m_entries.is_empty (); + if (bitmap_bit_p (*visited_bbs, bb->index)) + break; + bitmap_set_bit (*visited_bbs, bb->index); + + gimple_stmt_iterator gsi = gsi_last_nondebug_bb (bb); + if (gsi_end_p (gsi)) + break; + + if (!chain->m_entries.is_empty () && EDGE_COUNT (bb->preds) != 1) + break; + + gcond *cond = dyn_cast<gcond *> (gsi_stmt (gsi)); + if (cond == NULL) + break; + + if (first) + chain->m_first_condition = cond; + + edge true_edge, false_edge; + extract_true_false_edges_from_block (bb, &true_edge, &false_edge); + + /* Prevent loosing information for a PHI node where 2 edges will + be folded into one. Note that we must do the same also for false_edge + (for last BB in a if-elseif chain). */ + if (!chain->record_phi_arguments (true_edge) + || !chain->record_phi_arguments (false_edge)) + break; + + if_chain_entry entry (bb, true_edge, false_edge); + + /* Current we support following patterns (situations): + + 1) if condition with equal operation: + + <bb 2> : + if (argc_8(D) == 1) + goto <bb 3>; [INV] + else + goto <bb 4>; [INV] + + 2) if condition with a range check: + + <bb 3> : + _4 = c_13(D) + 198; + if (_4 <= 1) + goto <bb 7>; [INV] + else + goto <bb 4>; [INV] + + 3) mixture of 1) and 2) with a or condition: + + <bb 2> : + _1 = aChar_8(D) == 1; + _2 = aChar_8(D) == 10; + _3 = _1 | _2; + if (_3 != 0) + goto <bb 5>; [INV] + else + goto <bb 3>; [INV] + + or: + + <bb 2> : + aChar.1_1 = (unsigned int) aChar_10(D); + _2 = aChar.1_1 + 4294967287; + _3 = _2 <= 1; + _4 = aChar_10(D) == 12; + _5 = _3 | _4; + if (_5 != 0) + goto <bb 5>; [INV] + else + goto <bb 3>; [INV] + */ + + tree lhs = gimple_cond_lhs (cond); + tree rhs = gimple_cond_rhs (cond); + tree_code code = gimple_cond_code (cond); + unsigned visited_stmt_count = 0; + unsigned case_values = 0; + + /* Situation 1. */ + if (code == EQ_EXPR) + { + if (!extract_case_from_stmt (lhs, rhs, code, chain, &entry, + &visited_stmt_count)) + break; + case_values = 1; + } + /* Situation 2. */ + else if (code == LE_EXPR) + { + case_range range; + if (!extract_case_from_stmt (lhs, rhs, code, chain, &entry, + &visited_stmt_count)) + break; + case_values = 1; + } + /* Situation 3. */ + else if (code == NE_EXPR + && integer_zerop (rhs) + && TREE_CODE (lhs) == SSA_NAME + && TREE_CODE (TREE_TYPE (lhs)) == BOOLEAN_TYPE) + { + gassign *def = dyn_cast<gassign *> (SSA_NAME_DEF_STMT (lhs)); + if (def == NULL + || gimple_assign_rhs_code (def) != BIT_IOR_EXPR + || gimple_bb (def) != bb) + break; + + tree rhs1 = gimple_assign_rhs1 (def); + tree rhs2 = gimple_assign_rhs2 (def); + if (TREE_CODE (rhs1) != SSA_NAME || TREE_CODE (rhs2) != SSA_NAME) + break; + + gassign *def1 = dyn_cast<gassign *> (SSA_NAME_DEF_STMT (rhs1)); + gassign *def2 = dyn_cast<gassign *> (SSA_NAME_DEF_STMT (rhs2)); + if (def1 == NULL + || def2 == NULL + || def1 == def2 + || gimple_bb (def1) != bb + || gimple_bb (def2) != bb) + break; + + if (!extract_case_from_stmt (gimple_assign_rhs1 (def1), + gimple_assign_rhs2 (def1), + gimple_assign_rhs_code (def1), + chain, &entry, + &visited_stmt_count)) + break; + + if (!extract_case_from_stmt (gimple_assign_rhs1 (def2), + gimple_assign_rhs2 (def2), + gimple_assign_rhs_code (def2), + chain, &entry, + &visited_stmt_count)) + break; + case_values = 2; + visited_stmt_count += 2; + } + else + break; + + /* If it's not the first condition, then we need a BB without + any statements. */ + if (!first) + { + unsigned stmt_count = 0; + for (gimple_stmt_iterator gsi = gsi_start_nondebug_bb (bb); + !gsi_end_p (gsi); gsi_next_nondebug (&gsi)) + ++stmt_count; + + if (stmt_count - visited_stmt_count != 0) + break; + } + + total_case_values += case_values; + chain->m_entries.safe_push (entry); + + /* Follow if-elseif-elseif chain. */ + bb = false_edge->dest; + } + + if (total_case_values >= 3 + && chain->check_non_overlapping_cases () + && chain->is_beneficial ()) + { + expanded_location loc + = expand_location (gimple_location (chain->m_first_condition)); + if (dump_file) + { + fprintf (dump_file, "Condition chain (at %s:%d) with %d conditions " + "(%d BBs) transformed into a switch statement.\n", + loc.file, loc.line, total_case_values, + chain->m_entries.length ()); + } + + all_candidates->safe_push (chain); + } + else + { + /* Unmark last if chain entry to that it can become a potential beginning + of another chain. */ + if (!chain->m_entries.is_empty ()) + bitmap_clear_bit (*visited_bbs, bb->index); + delete chain; + } +} + +namespace { + +const pass_data pass_data_if_to_switch = +{ + GIMPLE_PASS, /* type */ + "iftoswitch", /* name */ + OPTGROUP_NONE, /* optinfo_flags */ + TV_TREE_IF_TO_SWITCH, /* tv_id */ + ( PROP_cfg | PROP_ssa ), /* properties_required */ + 0, /* properties_provided */ + 0, /* properties_destroyed */ + 0, /* todo_flags_start */ + TODO_cleanup_cfg | TODO_update_ssa /* todo_flags_finish */ +}; + +class pass_if_to_switch : public gimple_opt_pass +{ +public: + pass_if_to_switch (gcc::context *ctxt) + : gimple_opt_pass (pass_data_if_to_switch, ctxt) + {} + + /* opt_pass methods: */ + virtual bool gate (function *) { return flag_convert_if_to_switch != 0; } + virtual unsigned int execute (function *); + +}; // class pass_if_to_switch + +unsigned int +pass_if_to_switch::execute (function *fun) +{ + calculate_dominance_info (CDI_DOMINATORS); + + auto_vec<if_chain *> all_candidates; + auto_vec<basic_block> worklist; + auto_bitmap visited_bbs; + + worklist.safe_push (ENTRY_BLOCK_PTR_FOR_FN (fun)); + while (!worklist.is_empty ()) + { + basic_block bb = worklist.pop (); + find_switch_in_bb (bb, &all_candidates, &visited_bbs); + for (basic_block son = first_dom_son (CDI_DOMINATORS, bb); son; + son = next_dom_son (CDI_DOMINATORS, son)) + if (!bitmap_bit_p (visited_bbs, son->index)) + worklist.safe_push (son); + } + + for (unsigned i = 0; i < all_candidates.length (); i++) + { + convert_if_conditions_to_switch (all_candidates[i]); + delete all_candidates[i]; + } + + /* For now, just wipe the dominator information. */ + free_dominance_info (CDI_DOMINATORS); + + if (!all_candidates.is_empty ()) + mark_virtual_operands_for_renaming (fun); + + return 0; +} + +} // anon namespace + +gimple_opt_pass * +make_pass_if_to_switch (gcc::context *ctxt) +{ + return new pass_if_to_switch (ctxt); +} diff --git a/gcc/opts.c b/gcc/opts.c index c5c60581f70..c8d8d5e2ffb 100644 --- a/gcc/opts.c +++ b/gcc/opts.c @@ -509,6 +509,7 @@ static const struct default_options default_options_table[] = { OPT_LEVELS_2_PLUS, OPT_fvect_cost_model_, NULL, VECT_COST_MODEL_CHEAP }, { OPT_LEVELS_2_PLUS, OPT_finline_functions, NULL, 1 }, { OPT_LEVELS_2_PLUS, OPT_ftree_loop_distribute_patterns, NULL, 1 }, + { OPT_LEVELS_2_PLUS, OPT_fconvert_if_to_switch, NULL, 1 }, /* -O2 and above optimizations, but not -Os or -Og. */ { OPT_LEVELS_2_PLUS_SPEED_ONLY, OPT_falign_functions, NULL, 1 }, diff --git a/gcc/passes.def b/gcc/passes.def index c0098d755bf..4c3fd3c42cc 100644 --- a/gcc/passes.def +++ b/gcc/passes.def @@ -92,6 +92,7 @@ along with GCC; see the file COPYING3. If not see NEXT_PASS (pass_cd_dce); NEXT_PASS (pass_phiopt, true /* early_p */); NEXT_PASS (pass_tail_recursion); + NEXT_PASS (pass_if_to_switch); NEXT_PASS (pass_convert_switch); NEXT_PASS (pass_cleanup_eh); NEXT_PASS (pass_profile); diff --git a/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-1.c b/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-1.c new file mode 100644 index 00000000000..bcb8ef2a160 --- /dev/null +++ b/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-1.c @@ -0,0 +1,35 @@ +/* { dg-do compile } */ +/* { dg-options "-O2 -fdump-tree-iftoswitch" } */ + +int global; +int foo (); + +int main(int argc, char **argv) +{ + if (argc == 1) + foo (); + else if (argc == 2) + { + global += 1; + } + else if (argc == 3) + { + foo (); + foo (); + } + else if (argc == 4) + { + foo (); + } + else if (argc == 5) + { + global = 2; + } + else + global -= 123; + + global -= 12; + return 0; +} + +/* { dg-final { scan-tree-dump "Condition chain \\(at .*if-to-switch-1.c:9\\) with 5 conditions \\(5 BBs\\) transformed into a switch statement." "iftoswitch" } } */ diff --git a/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-2.c b/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-2.c new file mode 100644 index 00000000000..316e772ec29 --- /dev/null +++ b/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-2.c @@ -0,0 +1,11 @@ +/* { dg-do compile } */ +/* { dg-options "-O2 -fdump-tree-iftoswitch" } */ + +int IsHTMLWhitespaceNoRange(int aChar) +{ + return aChar == 0x0001 || aChar == 0x000A || + aChar == 0x000C || aChar == 0x000E || + aChar == 0x0020; +} + +/* { dg-final { scan-tree-dump "Condition chain \\(at .*if-to-switch-2.c:7\\) with 5 conditions \\(3 BBs\\) transformed into a switch statement." "iftoswitch" } } */ diff --git a/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-3.c b/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-3.c new file mode 100644 index 00000000000..fd07d909a3c --- /dev/null +++ b/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-3.c @@ -0,0 +1,11 @@ +/* { dg-do compile } */ +/* { dg-options "-O2 -fdump-tree-iftoswitch" } */ + +int IsHTMLWhitespace(int aChar) +{ + return aChar == 0x0009 || aChar == 0x000A || + aChar == 0x000C || aChar == 0x000D || + aChar == 0x0020 || aChar == 0x0030; +} + +/* { dg-final { scan-tree-dump "Condition chain \\(at .*if-to-switch-3.c:8\\) with 5 conditions \\(3 BBs\\) transformed into a switch statement." "iftoswitch" } } */ diff --git a/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-4.c b/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-4.c new file mode 100644 index 00000000000..3ae006f6ca2 --- /dev/null +++ b/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-4.c @@ -0,0 +1,36 @@ +/* { dg-do compile } */ +/* { dg-options "-O2 -fdump-tree-iftoswitch" } */ + +int global; +int foo (); + +int main(int argc, char **argv) +{ + if (argc == 1) + foo (); + else if (argc == 2) + { + global += 1; + } + else if (argc == 3) + { + foo (); + foo (); + } + else if (argc == 4) + { + foo (); + } + /* This will be removed with EVRP. */ + else if (argc == 1) + { + global = 2; + } + else + global -= 123; + + global -= 12; + return 0; +} + +/* { dg-final { scan-tree-dump-not "Condition chain" "iftoswitch" } } */ diff --git a/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-5.c b/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-5.c new file mode 100644 index 00000000000..acb8b4b1211 --- /dev/null +++ b/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-5.c @@ -0,0 +1,12 @@ +/* { dg-do compile } */ +/* { dg-options "-O2 -fdump-tree-iftoswitch" } */ + +int crud (unsigned char c) +{ + return (((((((((((int) c == 46) || (int) c == 44) + || (int) c == 58) || (int) c == 59) || (int) c == 60) + || (int) c == 62) || (int) c == 34) || (int) c == 92) + || (int) c == 39) != 0); +} + +/* { dg-final { scan-tree-dump "Condition chain \\(at .*if-to-switch-5.c:9\\) with 8 conditions \\(5 BBs\\) transformed into a switch statement." "iftoswitch" } } */ diff --git a/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-6.c b/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-6.c new file mode 100644 index 00000000000..7af323ae251 --- /dev/null +++ b/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-6.c @@ -0,0 +1,42 @@ +/* { dg-do compile } */ +/* { dg-options "-O2 -fdump-tree-iftoswitch" } */ + +int global; +int foo (); + +int main(int argc, char **argv) +{ + if (argc >= 1 && argc <= 10) + foo (); + else if (argc == 12) + { + global += 1; + } + else if (argc == 13) + { + foo (); + foo (); + } + else if (argc == 14) + { + foo (); + } + /* This will be removed with EVRP. */ + else if (argc == 5) + { + global = 2; + } + /* This will be removed with EVRP. */ + else if (argc >= 7 && argc <= 9) + { + global = 2; + } + + else + global -= 123; + + global -= 12; + return 0; +} + +/* { dg-final { scan-tree-dump-not "Condition chain" "iftoswitch" } } */ diff --git a/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-7.c b/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-7.c new file mode 100644 index 00000000000..1a919bf025a --- /dev/null +++ b/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-7.c @@ -0,0 +1,25 @@ +/* { dg-do compile } */ +/* { dg-options "-O2 -fdump-tree-iftoswitch" } */ + +int global; + +int foo(int a) +{ + int x = 0; + for (unsigned i = 0; i < a; i++) + { + if (a == 2) + { + global += 123; + x = 1; + } + else if (a == 3) + x = 2; + else if (a == 10) + x = 3; + } + + return x; +} + +/* { dg-final { scan-tree-dump-not "Condition chain " "iftoswitch" } } */ diff --git a/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-8.c b/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-8.c new file mode 100644 index 00000000000..a5f1a1eae18 --- /dev/null +++ b/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-8.c @@ -0,0 +1,27 @@ +/* { dg-do compile } */ +/* { dg-options "-O2 -fdump-tree-iftoswitch" } */ + +int global; +int global1; +int global2; +int global3; + +int foo(int a, int b) +{ + int x = 0; + for (unsigned i = 0; i < a; i++) + { + if (b == 1) + global += 2; + else if (a == 2) + global = 123; + else if (a == 3) + global1 = 1234; + else if (a == 10) + global2 = 12345; + else if (a == 1) + global2 = 123456; + } +} + +/* { dg-final { scan-tree-dump-not "Condition chain" "iftoswitch" } } */ diff --git a/gcc/testsuite/gcc.dg/tree-ssa/reassoc-32.c b/gcc/testsuite/gcc.dg/tree-ssa/reassoc-32.c index 944362ad076..8e53620a4df 100644 --- a/gcc/testsuite/gcc.dg/tree-ssa/reassoc-32.c +++ b/gcc/testsuite/gcc.dg/tree-ssa/reassoc-32.c @@ -1,6 +1,6 @@ /* { dg-do run { target { ! "m68k*-*-* mmix*-*-* bfin*-*-* v850*-*-* moxie*-*-* cris*-*-* m32c*-*-* fr30*-*-* mcore*-*-* powerpc*-*-* xtensa*-*-*"} } } */ -/* { dg-options "-O2 -fno-inline -fdump-tree-reassoc1-details --param logical-op-non-short-circuit=1" } */ +/* { dg-options "-O2 -fno-inline -fdump-tree-reassoc1-details --param logical-op-non-short-circuit=1 -fno-convert-if-to-switch" } */ /* { dg-additional-options "-mbranch-cost=2" { target branch_cost } } */ diff --git a/gcc/timevar.def b/gcc/timevar.def index 7dd1e2685a4..3d7886546d3 100644 --- a/gcc/timevar.def +++ b/gcc/timevar.def @@ -290,6 +290,7 @@ DEFTIMEVAR (TV_VAR_TRACKING , "variable tracking") DEFTIMEVAR (TV_VAR_TRACKING_DATAFLOW , "var-tracking dataflow") DEFTIMEVAR (TV_VAR_TRACKING_EMIT , "var-tracking emit") DEFTIMEVAR (TV_TREE_IFCOMBINE , "tree if-combine") +DEFTIMEVAR (TV_TREE_IF_TO_SWITCH , "if to switch conversion") DEFTIMEVAR (TV_TREE_UNINIT , "uninit var analysis") DEFTIMEVAR (TV_PLUGIN_INIT , "plugin initialization") DEFTIMEVAR (TV_PLUGIN_RUN , "plugin execution") diff --git a/gcc/tree-pass.h b/gcc/tree-pass.h index f01e811917d..3410c0205c2 100644 --- a/gcc/tree-pass.h +++ b/gcc/tree-pass.h @@ -374,6 +374,7 @@ extern gimple_opt_pass *make_pass_empty_loop (gcc::context *ctxt); extern gimple_opt_pass *make_pass_graphite (gcc::context *ctxt); extern gimple_opt_pass *make_pass_graphite_transforms (gcc::context *ctxt); extern gimple_opt_pass *make_pass_if_conversion (gcc::context *ctxt); +extern gimple_opt_pass *make_pass_if_to_switch (gcc::context *ctxt); extern gimple_opt_pass *make_pass_loop_distribution (gcc::context *ctxt); extern gimple_opt_pass *make_pass_vectorize (gcc::context *ctxt); extern gimple_opt_pass *make_pass_simduid_cleanup (gcc::context *ctxt); diff --git a/gcc/tree-switch-conversion.h b/gcc/tree-switch-conversion.h index 9ebcf109319..c6e90493049 100644 --- a/gcc/tree-switch-conversion.h +++ b/gcc/tree-switch-conversion.h @@ -48,8 +48,8 @@ class cluster { public: /* Constructor. */ - cluster (tree case_label_expr, basic_block case_bb, profile_probability prob, - profile_probability subtree_prob); + inline cluster (tree case_label_expr, basic_block case_bb, + profile_probability prob, profile_probability subtree_prob); /* Destructor. */ virtual ~cluster () @@ -122,8 +122,8 @@ class simple_cluster: public cluster { public: /* Constructor. */ - simple_cluster (tree low, tree high, tree case_label_expr, - basic_block case_bb, profile_probability prob); + inline simple_cluster (tree low, tree high, tree case_label_expr, + basic_block case_bb, profile_probability prob); /* Destructor. */ ~simple_cluster () @@ -147,6 +147,11 @@ public: return m_high; } + void set_high (tree high) + { + m_high = high; + } + void debug () { @@ -272,7 +277,7 @@ public: static inline unsigned int case_values_threshold (void); /* Return whether jump table expansion is allowed. */ - static bool is_enabled (void); + static inline bool is_enabled (void); }; /* A GIMPLE switch statement can be expanded to a short sequence of bit-wise -- 2.28.0 ^ permalink raw reply [flat|nested] 49+ messages in thread
* Re: [PATCH] Add if-chain to switch conversion pass. 2020-09-01 11:47 ` Martin Liška @ 2020-09-01 14:50 ` David Malcolm 2020-09-02 11:53 ` Martin Liška 0 siblings, 1 reply; 49+ messages in thread From: David Malcolm @ 2020-09-01 14:50 UTC (permalink / raw) To: Martin Liška, Richard Biener Cc: Jakub Jelinek, kazu, GCC Patches, Jan Hubicka On Tue, 2020-09-01 at 13:47 +0200, Martin Liška wrote: > Hello. > > There's a new version of the patch attempt. I mentioned couple of > issues with the v1 here: > https://gcc.gnu.org/pipermail/gcc-patches/2020-March/542821.html > > The patch addresses the biggest blocker which fact that the > optimization was done unconditionally. > Now the transformation happens only when a bit test or (and) a jump > table can be created. > > Patch can bootstrap on x86_64-linux-gnu and survives regression > tests. I'm also sending list > of if-chains that are transformed in GCC. > > Thoughts? > Thanks, > Martin Hopefully someone with deeper knowledge of gimple optimizations can review the patch properly, but here are a few nits I spotted (sorry): > gcc/ChangeLog: The older version of the patch had: PR tree-optimization/14799 PR ipa/88702 in both ChangeLog entries. Should this version? > * Makefile.in: Add new gimple-if-to-switch.o. > * common.opt: Add new option. > * dbgcnt.def (DEBUG_COUNTER): Add new debug counter. > * doc/invoke.texi: Presumably "Document -fconvert-if-to-switch." or somesuch. > * opts.c: Presumably: "Add -fconvert-if-to-switch at OPT_LEVELS_2_PLUS." or somesuch. > * passes.def: Register new pass. > * timevar.def (TV_TREE_IF_TO_SWITCH): Add new time variable. > * tree-pass.h (make_pass_if_to_switch): New. > * tree-switch-conversion.h: New file. > * gimple-if-to-switch.c: New file. I believe new C++ source files should have a ".cc" suffix. > gcc/testsuite/ChangeLog: (as above re bugzilla entries) > * gcc.dg/tree-ssa/reassoc-32.c: Presumably: "Add -fno-convert-if-to-switch." > * gcc.dg/tree-ssa/if-to-switch-1.c: New test. > * gcc.dg/tree-ssa/if-to-switch-2.c: New test. > * gcc.dg/tree-ssa/if-to-switch-3.c: New test. > * gcc.dg/tree-ssa/if-to-switch-4.c: New test. > * gcc.dg/tree-ssa/if-to-switch-5.c: New test. > * gcc.dg/tree-ssa/if-to-switch-6.c: New test. > * gcc.dg/tree-ssa/if-to-switch-7.c: New test. > * gcc.dg/tree-ssa/if-to-switch-8.c: New test. Hope this is constructive Dave ^ permalink raw reply [flat|nested] 49+ messages in thread
* Re: [PATCH] Add if-chain to switch conversion pass. 2020-09-01 14:50 ` David Malcolm @ 2020-09-02 11:53 ` Martin Liška 2020-09-21 8:55 ` Martin Liška 2020-09-24 12:41 ` Richard Biener 0 siblings, 2 replies; 49+ messages in thread From: Martin Liška @ 2020-09-02 11:53 UTC (permalink / raw) To: David Malcolm, Richard Biener Cc: Jakub Jelinek, kazu, GCC Patches, Jan Hubicka [-- Attachment #1: Type: text/plain, Size: 169 bytes --] On 9/1/20 4:50 PM, David Malcolm wrote: > Hope this is constructive > Dave Thank you David. All of them very very useful! There's updated version of the patch. Martin [-- Attachment #2: 0001-Add-if-chain-to-switch-conversion-pass.patch --] [-- Type: text/x-patch, Size: 38189 bytes --] From 6efbec6402a0babb0b8ccc2145fbf681e8030786 Mon Sep 17 00:00:00 2001 From: Martin Liska <mliska@suse.cz> Date: Fri, 28 Aug 2020 10:26:13 +0200 Subject: [PATCH] Add if-chain to switch conversion pass. gcc/ChangeLog: PR tree-optimization/14799 PR ipa/88702 * Makefile.in: Add new gimple-if-to-switch.o. * common.opt: Add new option. * dbgcnt.def (DEBUG_COUNTER): Add new debug counter. * doc/invoke.texi: Document -fconvert-if-to-switch. * opts.c: Add -fconvert-if-to-switch at OPT_LEVELS_2_PLUS. * passes.def: Register new pass. * timevar.def (TV_TREE_IF_TO_SWITCH): Add new time variable. * tree-pass.h (make_pass_if_to_switch): New. * tree-switch-conversion.h: New file. * gimple-if-to-switch.cc: New file. gcc/testsuite/ChangeLog: PR tree-optimization/14799 PR ipa/88702 * gcc.dg/tree-ssa/reassoc-32.c: Add -fno-convert-if-to-switch. * gcc.dg/tree-ssa/if-to-switch-1.c: New test. * gcc.dg/tree-ssa/if-to-switch-2.c: Likewise. * gcc.dg/tree-ssa/if-to-switch-3.c: Likewise. * gcc.dg/tree-ssa/if-to-switch-4.c: Likewise. * gcc.dg/tree-ssa/if-to-switch-5.c: Likewise. * gcc.dg/tree-ssa/if-to-switch-6.c: Likewise. * gcc.dg/tree-ssa/if-to-switch-7.c: Likewise. * gcc.dg/tree-ssa/if-to-switch-8.c: Likewise. --- gcc/Makefile.in | 1 + gcc/common.opt | 4 + gcc/dbgcnt.def | 1 + gcc/doc/invoke.texi | 13 +- gcc/gimple-if-to-switch.cc | 762 ++++++++++++++++++ gcc/opts.c | 1 + gcc/passes.def | 1 + .../gcc.dg/tree-ssa/if-to-switch-1.c | 35 + .../gcc.dg/tree-ssa/if-to-switch-2.c | 11 + .../gcc.dg/tree-ssa/if-to-switch-3.c | 11 + .../gcc.dg/tree-ssa/if-to-switch-4.c | 36 + .../gcc.dg/tree-ssa/if-to-switch-5.c | 12 + .../gcc.dg/tree-ssa/if-to-switch-6.c | 42 + .../gcc.dg/tree-ssa/if-to-switch-7.c | 25 + .../gcc.dg/tree-ssa/if-to-switch-8.c | 27 + gcc/testsuite/gcc.dg/tree-ssa/reassoc-32.c | 2 +- gcc/timevar.def | 1 + gcc/tree-pass.h | 1 + gcc/tree-switch-conversion.h | 15 +- 19 files changed, 993 insertions(+), 8 deletions(-) create mode 100644 gcc/gimple-if-to-switch.cc create mode 100644 gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-1.c create mode 100644 gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-2.c create mode 100644 gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-3.c create mode 100644 gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-4.c create mode 100644 gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-5.c create mode 100644 gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-6.c create mode 100644 gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-7.c create mode 100644 gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-8.c diff --git a/gcc/Makefile.in b/gcc/Makefile.in index 79e854aa938..782e9cfe95b 100644 --- a/gcc/Makefile.in +++ b/gcc/Makefile.in @@ -1361,6 +1361,7 @@ OBJS = \ gimple-array-bounds.o \ gimple-builder.o \ gimple-expr.o \ + gimple-if-to-switch.o \ gimple-iterator.o \ gimple-fold.o \ gimple-laddress.o \ diff --git a/gcc/common.opt b/gcc/common.opt index dd68c61ae1d..80e60934f22 100644 --- a/gcc/common.opt +++ b/gcc/common.opt @@ -1173,6 +1173,10 @@ fconserve-stack Common Var(flag_conserve_stack) Optimization Do not perform optimizations increasing noticeably stack usage. +fconvert-if-to-switch +Common Report Var(flag_convert_if_to_switch) Optimization +Perform conversions of if-elseif chain into a switch statement. + fcprop-registers Common Report Var(flag_cprop_registers) Optimization Perform a register copy-propagation optimization pass. diff --git a/gcc/dbgcnt.def b/gcc/dbgcnt.def index cf8775b2b66..e393e45deb4 100644 --- a/gcc/dbgcnt.def +++ b/gcc/dbgcnt.def @@ -170,6 +170,7 @@ DEBUG_COUNTER (if_after_combine) DEBUG_COUNTER (if_after_reload) DEBUG_COUNTER (if_conversion) DEBUG_COUNTER (if_conversion_tree) +DEBUG_COUNTER (if_to_switch) DEBUG_COUNTER (ipa_cp_bits) DEBUG_COUNTER (ipa_sra_params) DEBUG_COUNTER (ipa_sra_retvalues) diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi index 5d29a7fa23c..fcaf993e2c2 100644 --- a/gcc/doc/invoke.texi +++ b/gcc/doc/invoke.texi @@ -467,7 +467,7 @@ Objective-C and Objective-C++ Dialects}. -fassociative-math -fauto-profile -fauto-profile[=@var{path}] @gol -fauto-inc-dec -fbranch-probabilities @gol -fcaller-saves @gol --fcombine-stack-adjustments -fconserve-stack @gol +-fcombine-stack-adjustments -fconserve-stack -fconvert-if-to-switch @gol -fcompare-elim -fcprop-registers -fcrossjumping @gol -fcse-follow-jumps -fcse-skip-blocks -fcx-fortran-rules @gol -fcx-limited-range @gol @@ -534,7 +534,7 @@ Objective-C and Objective-C++ Dialects}. -fthread-jumps -ftracer -ftree-bit-ccp @gol -ftree-builtin-call-dce -ftree-ccp -ftree-ch @gol -ftree-coalesce-vars -ftree-copy-prop -ftree-dce -ftree-dominator-opts @gol --ftree-dse -ftree-forwprop -ftree-fre -fcode-hoisting @gol +-ftree-dse -ftree-forwprop -ftree-fre -fcode-hoisting @gol -ftree-loop-if-convert -ftree-loop-im @gol -ftree-phiprop -ftree-loop-distribution -ftree-loop-distribute-patterns @gol -ftree-loop-ivcanon -ftree-loop-linear -ftree-loop-optimize @gol @@ -2648,6 +2648,14 @@ Allow conditional expressions with mismatched types in the second and third arguments. The value of such an expression is void. This option is not supported for C++. +@item -fconvert-if-to-switch +@opindex fconvert-if-to-switch +Perform conversion of an if cascade into a switch statement. +Do so if the switch can be later transformed using a jump table +or a bit test. The transformation can help to produce faster code for +the switch statement. This flag is enabled by default +at @option{-O2} and higher. + @item -flax-vector-conversions @opindex flax-vector-conversions Allow implicit conversions between vectors with differing numbers of @@ -9581,6 +9589,7 @@ also turns on the following optimization flags: -falign-labels -falign-loops @gol -fcaller-saves @gol -fcode-hoisting @gol +-fconvert-if-to-switch @gol -fcrossjumping @gol -fcse-follow-jumps -fcse-skip-blocks @gol -fdelete-null-pointer-checks @gol diff --git a/gcc/gimple-if-to-switch.cc b/gcc/gimple-if-to-switch.cc new file mode 100644 index 00000000000..d67099cd614 --- /dev/null +++ b/gcc/gimple-if-to-switch.cc @@ -0,0 +1,762 @@ +/* If-elseif-else to switch conversion pass + Copyright (C) 2020 Free Software Foundation, Inc. + +This file is part of GCC. + +GCC is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 3, or (at your option) +any later version. + +GCC is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GCC; see the file COPYING3. If not see +<http://www.gnu.org/licenses/>. */ + +/* Algorithm of the pass runs in the following steps: + a) We walk basic blocks in DOMINATOR order so that we first reach + a first condition of a future switch. + b) We follow false edges of a if-else-chain and we record chain + of GIMPLE conditions. These blocks are only used for comparison + of a common SSA_NAME and we do not allow any side effect. + c) We remove all basic blocks (except first) of such chain and + GIMPLE switch replaces the condition in the first basic block. + d) We move all GIMPLE statements in the removed blocks into the + first one. */ + +#include "config.h" +#include "system.h" +#include "coretypes.h" +#include "backend.h" +#include "rtl.h" +#include "tree.h" +#include "gimple.h" +#include "tree-pass.h" +#include "ssa.h" +#include "gimple-pretty-print.h" +#include "fold-const.h" +#include "gimple-iterator.h" +#include "tree-cfg.h" +#include "tree-dfa.h" +#include "tree-cfgcleanup.h" +#include "alias.h" +#include "tree-ssa-loop.h" +#include "diagnostic.h" +#include "cfghooks.h" +#include "tree-into-ssa.h" +#include "cfganal.h" +#include "dbgcnt.h" +#include "target.h" +#include "alloc-pool.h" +#include "tree-switch-conversion.h" + +using namespace tree_switch_conversion; + +/* Tuple that holds minimum and maximum values in a case. */ + +struct case_range +{ + /* Default constructor. */ + case_range (): + m_min (NULL_TREE), m_max (NULL_TREE) + {} + + case_range (tree min, tree max): + m_min (min), m_max (max) + {} + + /* Minimum case value. */ + tree m_min; + /* Maximum case value. */ + tree m_max; +}; + +/* One entry of a if chain. */ + +struct if_chain_entry +{ + /* Constructor. */ + if_chain_entry (basic_block bb, edge true_edge, edge false_edge) + : m_case_values (), m_bb (bb), + m_true_edge (true_edge), m_false_edge (false_edge) + { + m_case_values.create (2); + } + + /* Vector of at maximum 2 case ranges. */ + vec<case_range> m_case_values; + /* Basic block of the original condition. */ + basic_block m_bb; + /* True edge of the gimple condition. */ + edge m_true_edge; + /* False edge of the gimple condition. */ + edge m_false_edge; +}; + +/* Master structure for one if to switch conversion candidate. */ + +struct if_chain +{ + /* Default constructor. */ + if_chain(): + m_first_condition (NULL), m_index (NULL_TREE), m_entries (), + m_phi_map () + { + m_entries.create (2); + } + + /* Default destructor. */ + ~if_chain () + { + m_entries.release (); + } + + /* Set index and check that it is not a different one. */ + bool set_and_check_index (tree index); + + /* Verify that all case ranges do not overlap. */ + bool check_non_overlapping_cases (); + + /* Return true when the switch can be expanded with a jump table or + a bit test (at least partially). */ + bool is_beneficial (); + + /* Record PHI arguments of a given edge E and return true + if GIMPLE switch creation will violate a PHI node. */ + bool record_phi_arguments (edge e); + + /* First condition of the chain. */ + gcond *m_first_condition; + /* Switch index. */ + tree m_index; + /* If chain entries. */ + vec<if_chain_entry> m_entries; + /* PHI map that is later used for reconstruction of PHI nodes. */ + hash_map<gphi *, tree> m_phi_map; +}; + +bool +if_chain::set_and_check_index (tree index) +{ + if (TREE_CODE (index) != SSA_NAME || !INTEGRAL_TYPE_P (TREE_TYPE (index))) + return false; + + if (m_index == NULL) + m_index = index; + + return index == m_index; +} + +/* Compare two case ranges by minimum value. */ + +static int +range_cmp (const void *a, const void *b) +{ + const case_range *cr1 = *(const case_range * const *) a; + const case_range *cr2 = *(const case_range * const *) b; + + return tree_int_cst_compare (cr1->m_min, cr2->m_min); +} + +bool +if_chain::check_non_overlapping_cases () +{ + auto_vec<case_range *> all_ranges; + for (unsigned i = 0; i < m_entries.length (); i++) + for (unsigned j = 0; j < m_entries[i].m_case_values.length (); j++) + all_ranges.safe_push (&m_entries[i].m_case_values[j]); + + all_ranges.qsort (range_cmp); + + for (unsigned i = 0; i < all_ranges.length () - 1; i++) + { + case_range *left = all_ranges[i]; + case_range *right = all_ranges[i + 1]; + if (tree_int_cst_le (left->m_min, right->m_min) + && tree_int_cst_le (right->m_min, left->m_max)) + return false; + } + + return true; +} + +/* Compare clusters by minimum value. */ + +static int +cluster_cmp (const void *a, const void *b) +{ + simple_cluster *sc1 = *(simple_cluster * const *) a; + simple_cluster *sc2 = *(simple_cluster * const *) b; + + return tree_int_cst_compare (sc1->get_low (), sc2->get_high ()); +} + +static void +dump_clusters (vec<cluster *> *clusters, const char *message) +{ + if (dump_file) + { + fprintf (dump_file, ";; %s: ", message); + for (unsigned i = 0; i < clusters->length (); i++) + (*clusters)[i]->dump (dump_file, dump_flags & TDF_DETAILS); + fprintf (dump_file, "\n"); + } +} + +/* Return true when the switch can be expanded with a jump table or + a bit test (at least partially). */ + +bool +if_chain::is_beneficial () +{ + profile_probability prob = profile_probability::uninitialized (); + + auto_vec<cluster *> clusters; + clusters.create (m_entries.length ()); + + for (unsigned i = 0; i < m_entries.length (); i++) + { + if_chain_entry *entry = &m_entries[i]; + for (unsigned j = 0; j < entry->m_case_values.length (); j++) + { + case_range *range = &entry->m_case_values[j]; + clusters.safe_push (new simple_cluster (range->m_min, range->m_max, + NULL_TREE, + entry->m_true_edge->dest, + prob)); + } + } + + /* Sort clusters and merge them. */ + auto_vec<cluster *> filtered_clusters; + filtered_clusters.create (16); + clusters.qsort (cluster_cmp); + simple_cluster *left = static_cast<simple_cluster *> (clusters[0]); + filtered_clusters.safe_push (left); + + for (unsigned i = 1; i < clusters.length (); i++) + { + simple_cluster *right = static_cast<simple_cluster *> (clusters[i]); + tree type = TREE_TYPE (left->get_low ()); + tree pos_one = build_int_cst (type, 1); + if (left->m_case_bb == right->m_case_bb) + { + tree next = int_const_binop (PLUS_EXPR, left->get_high (), pos_one); + if (tree_int_cst_equal (next, right->get_low ())) + { + left->set_high (right->get_high ()); + continue; + } + } + + left = static_cast<simple_cluster *> (clusters[i]); + filtered_clusters.safe_push (left); + } + + dump_clusters (&filtered_clusters, "Canonical GIMPLE case clusters"); + + vec<cluster *> output = jump_table_cluster::find_jump_tables (filtered_clusters); + bool r = output.length () < filtered_clusters.length (); + if (r) + dump_clusters (&output, "JT can be built"); + output.release (); + if (r) + return true; + + output = bit_test_cluster::find_bit_tests (filtered_clusters); + r = output.length () < filtered_clusters.length (); + if (r) + dump_clusters (&output, "BT can be built"); + output.release (); + return r; +} + +bool +if_chain::record_phi_arguments (edge e) +{ + for (gphi_iterator gsi = gsi_start_phis (e->dest); !gsi_end_p (gsi); + gsi_next (&gsi)) + { + gphi *phi = gsi.phi (); + if (!virtual_operand_p (gimple_phi_result (phi))) + { + tree arg = PHI_ARG_DEF_FROM_EDGE (phi, e); + tree *v = m_phi_map.get (phi); + if (v != NULL) + { + if (arg != *v) + return false; + } + else + m_phi_map.put (phi, arg); + } + } + + return true; +} + +/* Build case label with MIN and MAX values of a given basic block DEST. */ + +static tree +build_case_label (tree min, tree max, basic_block dest) +{ + tree label = gimple_block_label (dest); + return build_case_label (min, min == max ? NULL_TREE : max, label); +} + +/* Compare two integer constants. */ + +static int +label_cmp (const void *a, const void *b) +{ + const_tree l1 = *(const const_tree *) a; + const_tree l2 = *(const const_tree *) b; + + return tree_int_cst_compare (CASE_LOW (l1), CASE_LOW (l2)); +} + +/* Convert a given if CHAIN into a switch GIMPLE statement. */ + +static void +convert_if_conditions_to_switch (if_chain *chain) +{ + if (!dbg_cnt (if_to_switch)) + return; + + auto_vec<tree> labels; + if_chain_entry first_cond = chain->m_entries[0]; + + unsigned entries = chain->m_entries.length (); + edge default_edge = chain->m_entries[entries - 1].m_false_edge; + basic_block default_bb = default_edge->dest; + + gimple_stmt_iterator gsi = gsi_for_stmt (chain->m_first_condition); + for (unsigned i = 0; i < chain->m_entries.length (); i++) + { + if_chain_entry entry = chain->m_entries[i]; + + basic_block case_bb = entry.m_true_edge->dest; + + for (unsigned j = 0; j < entry.m_case_values.length (); j++) + labels.safe_push (build_case_label (entry.m_case_values[j].m_min, + entry.m_case_values[j].m_max, + case_bb)); + default_bb = entry.m_false_edge->dest; + + if (i == 0) + { + remove_edge (first_cond.m_true_edge); + remove_edge (first_cond.m_false_edge); + } + else + { + /* Move all statements from the BB to the BB with gswitch. */ + auto_vec<gimple *> stmts; + for (gimple_stmt_iterator gsi = gsi_start_bb (entry.m_bb); + !gsi_end_p (gsi); gsi_next (&gsi)) + { + gimple *stmt = gsi_stmt (gsi); + if (gimple_code (stmt) != GIMPLE_COND) + stmts.safe_push (stmt); + } + + for (unsigned i = 0; i < stmts.length (); i++) + { + gimple_stmt_iterator gsi_from = gsi_for_stmt (stmts[i]); + gsi_move_before (&gsi_from, &gsi); + } + + delete_basic_block (entry.m_bb); + } + + make_edge (first_cond.m_bb, case_bb, 0); + } + + labels.qsort (label_cmp); + + edge e = find_edge (first_cond.m_bb, default_bb); + if (e == NULL) + e = make_edge (first_cond.m_bb, default_bb, 0); + gswitch *s + = gimple_build_switch (chain->m_index, + build_case_label (NULL_TREE, NULL_TREE, default_bb), + labels); + + gsi_remove (&gsi, true); + gsi_insert_before (&gsi, s, GSI_NEW_STMT); + + if (dump_file) + { + fprintf (dump_file, "Expanded into a new gimple STMT: "); + print_gimple_stmt (dump_file, s, 0, TDF_SLIM); + putc ('\n', dump_file); + } + + /* Fill up missing PHI node arguments. */ + for (hash_map<gphi *, tree>::iterator it = chain->m_phi_map.begin (); + it != chain->m_phi_map.end (); ++it) + { + gphi *phi = (*it).first; + if (!virtual_operand_p (gimple_phi_result (phi))) + { + for (unsigned i = 0; i < gimple_phi_num_args (phi); i++) + { + if (gimple_phi_arg_def (phi, i) == NULL_TREE) + { + add_phi_arg (phi, (*it).second, gimple_phi_arg_edge (phi, i), + UNKNOWN_LOCATION); + break; + } + } + } + } +} + +static bool +extract_case_from_stmt (tree rhs1, tree rhs2, tree_code code, + if_chain *chain, if_chain_entry *entry, + unsigned *visited_stmt_count) +{ + tree index = NULL_TREE; + case_range range; + + if (code == EQ_EXPR) + { + /* Handle situation 2a: + _1 = aChar_8(D) == 1; */ + index = rhs1; + + /* We can meet a readonly type used for a constant. */ + rhs2 = fold_convert (TREE_TYPE (index), rhs2); + if (TREE_CODE (rhs2) != INTEGER_CST) + return false; + + range = case_range (rhs2, rhs2); + *visited_stmt_count += 1; + } + else if (code == LE_EXPR) + { + /* Handle situation 2b: + aChar.1_1 = (unsigned int) aChar_10(D); + _2 = aChar.1_1 + 4294967287; + _3 = _2 <= 1; */ + tree ssa = rhs1; + tree range_size = rhs2; + if (TREE_CODE (ssa) != SSA_NAME + || TREE_CODE (range_size) != INTEGER_CST) + return false; + + gassign *subtraction = dyn_cast<gassign *> (SSA_NAME_DEF_STMT (ssa)); + if (subtraction == NULL + || gimple_assign_rhs_code (subtraction) != PLUS_EXPR) + return false; + + tree casted = gimple_assign_rhs1 (subtraction); + tree min = gimple_assign_rhs2 (subtraction); + if (TREE_CODE (casted) != SSA_NAME + || TREE_CODE (min) != INTEGER_CST) + return false; + + if (!SSA_NAME_IS_DEFAULT_DEF (casted)) + { + gassign *to_unsigned + = dyn_cast<gassign *> (SSA_NAME_DEF_STMT (casted)); + if (to_unsigned == NULL + || !gimple_assign_unary_nop_p (to_unsigned) + || !TYPE_UNSIGNED (TREE_TYPE (casted))) + return false; + index = gimple_assign_rhs1 (to_unsigned); + ++(*visited_stmt_count); + } + else + index = casted; + + tree type = TREE_TYPE (index); + tree range_min = fold_convert (type, const_unop (NEGATE_EXPR, type, min)); + range = case_range (range_min, const_binop (PLUS_EXPR, type, range_min, + fold_convert (type, + range_size))); + *visited_stmt_count += 2; + } + else + return false; + + if (!chain->set_and_check_index (index)) + return false; + entry->m_case_values.safe_push (range); + + return true; +} + +static void +find_switch_in_bb (basic_block bb, auto_vec<if_chain *> *all_candidates, + auto_bitmap *visited_bbs) +{ + if_chain *chain = new if_chain (); + unsigned total_case_values = 0; + + while (true) + { + bool first = chain->m_entries.is_empty (); + if (bitmap_bit_p (*visited_bbs, bb->index)) + break; + bitmap_set_bit (*visited_bbs, bb->index); + + gimple_stmt_iterator gsi = gsi_last_nondebug_bb (bb); + if (gsi_end_p (gsi)) + break; + + if (!chain->m_entries.is_empty () && EDGE_COUNT (bb->preds) != 1) + break; + + gcond *cond = dyn_cast<gcond *> (gsi_stmt (gsi)); + if (cond == NULL) + break; + + if (first) + chain->m_first_condition = cond; + + edge true_edge, false_edge; + extract_true_false_edges_from_block (bb, &true_edge, &false_edge); + + /* Prevent loosing information for a PHI node where 2 edges will + be folded into one. Note that we must do the same also for false_edge + (for last BB in a if-elseif chain). */ + if (!chain->record_phi_arguments (true_edge) + || !chain->record_phi_arguments (false_edge)) + break; + + if_chain_entry entry (bb, true_edge, false_edge); + + /* Current we support following patterns (situations): + + 1) if condition with equal operation: + + <bb 2> : + if (argc_8(D) == 1) + goto <bb 3>; [INV] + else + goto <bb 4>; [INV] + + 2) if condition with a range check: + + <bb 3> : + _4 = c_13(D) + 198; + if (_4 <= 1) + goto <bb 7>; [INV] + else + goto <bb 4>; [INV] + + 3) mixture of 1) and 2) with a or condition: + + <bb 2> : + _1 = aChar_8(D) == 1; + _2 = aChar_8(D) == 10; + _3 = _1 | _2; + if (_3 != 0) + goto <bb 5>; [INV] + else + goto <bb 3>; [INV] + + or: + + <bb 2> : + aChar.1_1 = (unsigned int) aChar_10(D); + _2 = aChar.1_1 + 4294967287; + _3 = _2 <= 1; + _4 = aChar_10(D) == 12; + _5 = _3 | _4; + if (_5 != 0) + goto <bb 5>; [INV] + else + goto <bb 3>; [INV] + */ + + tree lhs = gimple_cond_lhs (cond); + tree rhs = gimple_cond_rhs (cond); + tree_code code = gimple_cond_code (cond); + unsigned visited_stmt_count = 0; + unsigned case_values = 0; + + /* Situation 1. */ + if (code == EQ_EXPR) + { + if (!extract_case_from_stmt (lhs, rhs, code, chain, &entry, + &visited_stmt_count)) + break; + case_values = 1; + } + /* Situation 2. */ + else if (code == LE_EXPR) + { + case_range range; + if (!extract_case_from_stmt (lhs, rhs, code, chain, &entry, + &visited_stmt_count)) + break; + case_values = 1; + } + /* Situation 3. */ + else if (code == NE_EXPR + && integer_zerop (rhs) + && TREE_CODE (lhs) == SSA_NAME + && TREE_CODE (TREE_TYPE (lhs)) == BOOLEAN_TYPE) + { + gassign *def = dyn_cast<gassign *> (SSA_NAME_DEF_STMT (lhs)); + if (def == NULL + || gimple_assign_rhs_code (def) != BIT_IOR_EXPR + || gimple_bb (def) != bb) + break; + + tree rhs1 = gimple_assign_rhs1 (def); + tree rhs2 = gimple_assign_rhs2 (def); + if (TREE_CODE (rhs1) != SSA_NAME || TREE_CODE (rhs2) != SSA_NAME) + break; + + gassign *def1 = dyn_cast<gassign *> (SSA_NAME_DEF_STMT (rhs1)); + gassign *def2 = dyn_cast<gassign *> (SSA_NAME_DEF_STMT (rhs2)); + if (def1 == NULL + || def2 == NULL + || def1 == def2 + || gimple_bb (def1) != bb + || gimple_bb (def2) != bb) + break; + + if (!extract_case_from_stmt (gimple_assign_rhs1 (def1), + gimple_assign_rhs2 (def1), + gimple_assign_rhs_code (def1), + chain, &entry, + &visited_stmt_count)) + break; + + if (!extract_case_from_stmt (gimple_assign_rhs1 (def2), + gimple_assign_rhs2 (def2), + gimple_assign_rhs_code (def2), + chain, &entry, + &visited_stmt_count)) + break; + case_values = 2; + visited_stmt_count += 2; + } + else + break; + + /* If it's not the first condition, then we need a BB without + any statements. */ + if (!first) + { + unsigned stmt_count = 0; + for (gimple_stmt_iterator gsi = gsi_start_nondebug_bb (bb); + !gsi_end_p (gsi); gsi_next_nondebug (&gsi)) + ++stmt_count; + + if (stmt_count - visited_stmt_count != 0) + break; + } + + total_case_values += case_values; + chain->m_entries.safe_push (entry); + + /* Follow if-elseif-elseif chain. */ + bb = false_edge->dest; + } + + if (total_case_values >= 3 + && chain->check_non_overlapping_cases () + && chain->is_beneficial ()) + { + expanded_location loc + = expand_location (gimple_location (chain->m_first_condition)); + if (dump_file) + { + fprintf (dump_file, "Condition chain (at %s:%d) with %d conditions " + "(%d BBs) transformed into a switch statement.\n", + loc.file, loc.line, total_case_values, + chain->m_entries.length ()); + } + + all_candidates->safe_push (chain); + } + else + { + /* Unmark last if chain entry to that it can become a potential beginning + of another chain. */ + if (!chain->m_entries.is_empty ()) + bitmap_clear_bit (*visited_bbs, bb->index); + delete chain; + } +} + +namespace { + +const pass_data pass_data_if_to_switch = +{ + GIMPLE_PASS, /* type */ + "iftoswitch", /* name */ + OPTGROUP_NONE, /* optinfo_flags */ + TV_TREE_IF_TO_SWITCH, /* tv_id */ + ( PROP_cfg | PROP_ssa ), /* properties_required */ + 0, /* properties_provided */ + 0, /* properties_destroyed */ + 0, /* todo_flags_start */ + TODO_cleanup_cfg | TODO_update_ssa /* todo_flags_finish */ +}; + +class pass_if_to_switch : public gimple_opt_pass +{ +public: + pass_if_to_switch (gcc::context *ctxt) + : gimple_opt_pass (pass_data_if_to_switch, ctxt) + {} + + /* opt_pass methods: */ + virtual bool gate (function *) { return flag_convert_if_to_switch != 0; } + virtual unsigned int execute (function *); + +}; // class pass_if_to_switch + +unsigned int +pass_if_to_switch::execute (function *fun) +{ + calculate_dominance_info (CDI_DOMINATORS); + + auto_vec<if_chain *> all_candidates; + auto_vec<basic_block> worklist; + auto_bitmap visited_bbs; + + worklist.safe_push (ENTRY_BLOCK_PTR_FOR_FN (fun)); + while (!worklist.is_empty ()) + { + basic_block bb = worklist.pop (); + find_switch_in_bb (bb, &all_candidates, &visited_bbs); + for (basic_block son = first_dom_son (CDI_DOMINATORS, bb); son; + son = next_dom_son (CDI_DOMINATORS, son)) + if (!bitmap_bit_p (visited_bbs, son->index)) + worklist.safe_push (son); + } + + for (unsigned i = 0; i < all_candidates.length (); i++) + { + convert_if_conditions_to_switch (all_candidates[i]); + delete all_candidates[i]; + } + + /* For now, just wipe the dominator information. */ + free_dominance_info (CDI_DOMINATORS); + + if (!all_candidates.is_empty ()) + mark_virtual_operands_for_renaming (fun); + + return 0; +} + +} // anon namespace + +gimple_opt_pass * +make_pass_if_to_switch (gcc::context *ctxt) +{ + return new pass_if_to_switch (ctxt); +} diff --git a/gcc/opts.c b/gcc/opts.c index c5c60581f70..c8d8d5e2ffb 100644 --- a/gcc/opts.c +++ b/gcc/opts.c @@ -509,6 +509,7 @@ static const struct default_options default_options_table[] = { OPT_LEVELS_2_PLUS, OPT_fvect_cost_model_, NULL, VECT_COST_MODEL_CHEAP }, { OPT_LEVELS_2_PLUS, OPT_finline_functions, NULL, 1 }, { OPT_LEVELS_2_PLUS, OPT_ftree_loop_distribute_patterns, NULL, 1 }, + { OPT_LEVELS_2_PLUS, OPT_fconvert_if_to_switch, NULL, 1 }, /* -O2 and above optimizations, but not -Os or -Og. */ { OPT_LEVELS_2_PLUS_SPEED_ONLY, OPT_falign_functions, NULL, 1 }, diff --git a/gcc/passes.def b/gcc/passes.def index c0098d755bf..4c3fd3c42cc 100644 --- a/gcc/passes.def +++ b/gcc/passes.def @@ -92,6 +92,7 @@ along with GCC; see the file COPYING3. If not see NEXT_PASS (pass_cd_dce); NEXT_PASS (pass_phiopt, true /* early_p */); NEXT_PASS (pass_tail_recursion); + NEXT_PASS (pass_if_to_switch); NEXT_PASS (pass_convert_switch); NEXT_PASS (pass_cleanup_eh); NEXT_PASS (pass_profile); diff --git a/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-1.c b/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-1.c new file mode 100644 index 00000000000..bcb8ef2a160 --- /dev/null +++ b/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-1.c @@ -0,0 +1,35 @@ +/* { dg-do compile } */ +/* { dg-options "-O2 -fdump-tree-iftoswitch" } */ + +int global; +int foo (); + +int main(int argc, char **argv) +{ + if (argc == 1) + foo (); + else if (argc == 2) + { + global += 1; + } + else if (argc == 3) + { + foo (); + foo (); + } + else if (argc == 4) + { + foo (); + } + else if (argc == 5) + { + global = 2; + } + else + global -= 123; + + global -= 12; + return 0; +} + +/* { dg-final { scan-tree-dump "Condition chain \\(at .*if-to-switch-1.c:9\\) with 5 conditions \\(5 BBs\\) transformed into a switch statement." "iftoswitch" } } */ diff --git a/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-2.c b/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-2.c new file mode 100644 index 00000000000..316e772ec29 --- /dev/null +++ b/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-2.c @@ -0,0 +1,11 @@ +/* { dg-do compile } */ +/* { dg-options "-O2 -fdump-tree-iftoswitch" } */ + +int IsHTMLWhitespaceNoRange(int aChar) +{ + return aChar == 0x0001 || aChar == 0x000A || + aChar == 0x000C || aChar == 0x000E || + aChar == 0x0020; +} + +/* { dg-final { scan-tree-dump "Condition chain \\(at .*if-to-switch-2.c:7\\) with 5 conditions \\(3 BBs\\) transformed into a switch statement." "iftoswitch" } } */ diff --git a/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-3.c b/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-3.c new file mode 100644 index 00000000000..fd07d909a3c --- /dev/null +++ b/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-3.c @@ -0,0 +1,11 @@ +/* { dg-do compile } */ +/* { dg-options "-O2 -fdump-tree-iftoswitch" } */ + +int IsHTMLWhitespace(int aChar) +{ + return aChar == 0x0009 || aChar == 0x000A || + aChar == 0x000C || aChar == 0x000D || + aChar == 0x0020 || aChar == 0x0030; +} + +/* { dg-final { scan-tree-dump "Condition chain \\(at .*if-to-switch-3.c:8\\) with 5 conditions \\(3 BBs\\) transformed into a switch statement." "iftoswitch" } } */ diff --git a/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-4.c b/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-4.c new file mode 100644 index 00000000000..3ae006f6ca2 --- /dev/null +++ b/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-4.c @@ -0,0 +1,36 @@ +/* { dg-do compile } */ +/* { dg-options "-O2 -fdump-tree-iftoswitch" } */ + +int global; +int foo (); + +int main(int argc, char **argv) +{ + if (argc == 1) + foo (); + else if (argc == 2) + { + global += 1; + } + else if (argc == 3) + { + foo (); + foo (); + } + else if (argc == 4) + { + foo (); + } + /* This will be removed with EVRP. */ + else if (argc == 1) + { + global = 2; + } + else + global -= 123; + + global -= 12; + return 0; +} + +/* { dg-final { scan-tree-dump-not "Condition chain" "iftoswitch" } } */ diff --git a/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-5.c b/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-5.c new file mode 100644 index 00000000000..acb8b4b1211 --- /dev/null +++ b/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-5.c @@ -0,0 +1,12 @@ +/* { dg-do compile } */ +/* { dg-options "-O2 -fdump-tree-iftoswitch" } */ + +int crud (unsigned char c) +{ + return (((((((((((int) c == 46) || (int) c == 44) + || (int) c == 58) || (int) c == 59) || (int) c == 60) + || (int) c == 62) || (int) c == 34) || (int) c == 92) + || (int) c == 39) != 0); +} + +/* { dg-final { scan-tree-dump "Condition chain \\(at .*if-to-switch-5.c:9\\) with 8 conditions \\(5 BBs\\) transformed into a switch statement." "iftoswitch" } } */ diff --git a/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-6.c b/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-6.c new file mode 100644 index 00000000000..7af323ae251 --- /dev/null +++ b/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-6.c @@ -0,0 +1,42 @@ +/* { dg-do compile } */ +/* { dg-options "-O2 -fdump-tree-iftoswitch" } */ + +int global; +int foo (); + +int main(int argc, char **argv) +{ + if (argc >= 1 && argc <= 10) + foo (); + else if (argc == 12) + { + global += 1; + } + else if (argc == 13) + { + foo (); + foo (); + } + else if (argc == 14) + { + foo (); + } + /* This will be removed with EVRP. */ + else if (argc == 5) + { + global = 2; + } + /* This will be removed with EVRP. */ + else if (argc >= 7 && argc <= 9) + { + global = 2; + } + + else + global -= 123; + + global -= 12; + return 0; +} + +/* { dg-final { scan-tree-dump-not "Condition chain" "iftoswitch" } } */ diff --git a/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-7.c b/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-7.c new file mode 100644 index 00000000000..1a919bf025a --- /dev/null +++ b/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-7.c @@ -0,0 +1,25 @@ +/* { dg-do compile } */ +/* { dg-options "-O2 -fdump-tree-iftoswitch" } */ + +int global; + +int foo(int a) +{ + int x = 0; + for (unsigned i = 0; i < a; i++) + { + if (a == 2) + { + global += 123; + x = 1; + } + else if (a == 3) + x = 2; + else if (a == 10) + x = 3; + } + + return x; +} + +/* { dg-final { scan-tree-dump-not "Condition chain " "iftoswitch" } } */ diff --git a/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-8.c b/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-8.c new file mode 100644 index 00000000000..a5f1a1eae18 --- /dev/null +++ b/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-8.c @@ -0,0 +1,27 @@ +/* { dg-do compile } */ +/* { dg-options "-O2 -fdump-tree-iftoswitch" } */ + +int global; +int global1; +int global2; +int global3; + +int foo(int a, int b) +{ + int x = 0; + for (unsigned i = 0; i < a; i++) + { + if (b == 1) + global += 2; + else if (a == 2) + global = 123; + else if (a == 3) + global1 = 1234; + else if (a == 10) + global2 = 12345; + else if (a == 1) + global2 = 123456; + } +} + +/* { dg-final { scan-tree-dump-not "Condition chain" "iftoswitch" } } */ diff --git a/gcc/testsuite/gcc.dg/tree-ssa/reassoc-32.c b/gcc/testsuite/gcc.dg/tree-ssa/reassoc-32.c index 944362ad076..8e53620a4df 100644 --- a/gcc/testsuite/gcc.dg/tree-ssa/reassoc-32.c +++ b/gcc/testsuite/gcc.dg/tree-ssa/reassoc-32.c @@ -1,6 +1,6 @@ /* { dg-do run { target { ! "m68k*-*-* mmix*-*-* bfin*-*-* v850*-*-* moxie*-*-* cris*-*-* m32c*-*-* fr30*-*-* mcore*-*-* powerpc*-*-* xtensa*-*-*"} } } */ -/* { dg-options "-O2 -fno-inline -fdump-tree-reassoc1-details --param logical-op-non-short-circuit=1" } */ +/* { dg-options "-O2 -fno-inline -fdump-tree-reassoc1-details --param logical-op-non-short-circuit=1 -fno-convert-if-to-switch" } */ /* { dg-additional-options "-mbranch-cost=2" { target branch_cost } } */ diff --git a/gcc/timevar.def b/gcc/timevar.def index 7dd1e2685a4..3d7886546d3 100644 --- a/gcc/timevar.def +++ b/gcc/timevar.def @@ -290,6 +290,7 @@ DEFTIMEVAR (TV_VAR_TRACKING , "variable tracking") DEFTIMEVAR (TV_VAR_TRACKING_DATAFLOW , "var-tracking dataflow") DEFTIMEVAR (TV_VAR_TRACKING_EMIT , "var-tracking emit") DEFTIMEVAR (TV_TREE_IFCOMBINE , "tree if-combine") +DEFTIMEVAR (TV_TREE_IF_TO_SWITCH , "if to switch conversion") DEFTIMEVAR (TV_TREE_UNINIT , "uninit var analysis") DEFTIMEVAR (TV_PLUGIN_INIT , "plugin initialization") DEFTIMEVAR (TV_PLUGIN_RUN , "plugin execution") diff --git a/gcc/tree-pass.h b/gcc/tree-pass.h index f01e811917d..3410c0205c2 100644 --- a/gcc/tree-pass.h +++ b/gcc/tree-pass.h @@ -374,6 +374,7 @@ extern gimple_opt_pass *make_pass_empty_loop (gcc::context *ctxt); extern gimple_opt_pass *make_pass_graphite (gcc::context *ctxt); extern gimple_opt_pass *make_pass_graphite_transforms (gcc::context *ctxt); extern gimple_opt_pass *make_pass_if_conversion (gcc::context *ctxt); +extern gimple_opt_pass *make_pass_if_to_switch (gcc::context *ctxt); extern gimple_opt_pass *make_pass_loop_distribution (gcc::context *ctxt); extern gimple_opt_pass *make_pass_vectorize (gcc::context *ctxt); extern gimple_opt_pass *make_pass_simduid_cleanup (gcc::context *ctxt); diff --git a/gcc/tree-switch-conversion.h b/gcc/tree-switch-conversion.h index 9ebcf109319..c6e90493049 100644 --- a/gcc/tree-switch-conversion.h +++ b/gcc/tree-switch-conversion.h @@ -48,8 +48,8 @@ class cluster { public: /* Constructor. */ - cluster (tree case_label_expr, basic_block case_bb, profile_probability prob, - profile_probability subtree_prob); + inline cluster (tree case_label_expr, basic_block case_bb, + profile_probability prob, profile_probability subtree_prob); /* Destructor. */ virtual ~cluster () @@ -122,8 +122,8 @@ class simple_cluster: public cluster { public: /* Constructor. */ - simple_cluster (tree low, tree high, tree case_label_expr, - basic_block case_bb, profile_probability prob); + inline simple_cluster (tree low, tree high, tree case_label_expr, + basic_block case_bb, profile_probability prob); /* Destructor. */ ~simple_cluster () @@ -147,6 +147,11 @@ public: return m_high; } + void set_high (tree high) + { + m_high = high; + } + void debug () { @@ -272,7 +277,7 @@ public: static inline unsigned int case_values_threshold (void); /* Return whether jump table expansion is allowed. */ - static bool is_enabled (void); + static inline bool is_enabled (void); }; /* A GIMPLE switch statement can be expanded to a short sequence of bit-wise -- 2.28.0 ^ permalink raw reply [flat|nested] 49+ messages in thread
* Re: [PATCH] Add if-chain to switch conversion pass. 2020-09-02 11:53 ` Martin Liška @ 2020-09-21 8:55 ` Martin Liška 2020-09-24 12:41 ` Richard Biener 1 sibling, 0 replies; 49+ messages in thread From: Martin Liška @ 2020-09-21 8:55 UTC (permalink / raw) To: David Malcolm, Richard Biener; +Cc: Jakub Jelinek, GCC Patches, Jan Hubicka PING^1 On 9/2/20 1:53 PM, Martin Liška wrote: > On 9/1/20 4:50 PM, David Malcolm wrote: >> Hope this is constructive >> Dave > > Thank you David. All of them very very useful! > > There's updated version of the patch. > Martin ^ permalink raw reply [flat|nested] 49+ messages in thread
* Re: [PATCH] Add if-chain to switch conversion pass. 2020-09-02 11:53 ` Martin Liška 2020-09-21 8:55 ` Martin Liška @ 2020-09-24 12:41 ` Richard Biener 2020-09-25 14:05 ` Martin Liška 2020-10-02 13:23 ` Martin Liška 1 sibling, 2 replies; 49+ messages in thread From: Richard Biener @ 2020-09-24 12:41 UTC (permalink / raw) To: Martin Liška Cc: David Malcolm, Jakub Jelinek, kazu, GCC Patches, Jan Hubicka On Wed, Sep 2, 2020 at 1:53 PM Martin Liška <mliska@suse.cz> wrote: > > On 9/1/20 4:50 PM, David Malcolm wrote: > > Hope this is constructive > > Dave > > Thank you David. All of them very very useful! > > There's updated version of the patch. I noticed several functions without a function-level comment. - cluster (tree case_label_expr, basic_block case_bb, profile_probability prob, - profile_probability subtree_prob); + inline cluster (tree case_label_expr, basic_block case_bb, + profile_probability prob, profile_probability subtree_prob); I thought we generally leave this to the compiler ... +@item -fconvert-if-to-switch +@opindex fconvert-if-to-switch +Perform conversion of an if cascade into a switch statement. +Do so if the switch can be later transformed using a jump table +or a bit test. The transformation can help to produce faster code for +the switch statement. This flag is enabled by default +at @option{-O2} and higher. this mentions we do this only when we later can convert the switch again but both passes (we still have two :/) have independent guards. + /* For now, just wipe the dominator information. */ + free_dominance_info (CDI_DOMINATORS); could at least be conditional on the vop renaming condition... + if (!all_candidates.is_empty ()) + mark_virtual_operands_for_renaming (fun); + if (bitmap_bit_p (*visited_bbs, bb->index)) + break; + bitmap_set_bit (*visited_bbs, bb->index); since you are using a bitmap and not a sbitmap (why?) you can combine those into if (!bitmap_set_bit (*visited_bbs, bb->index)) break; + /* Current we support following patterns (situations): + + 1) if condition with equal operation: + ... did you see whether using register_edge_assert_for (lhs, true_edge, code, lhs, rhs, asserts); works equally well? It fills the 'asserts' vector with relations derived from 'lhs'. There's also vr_values::extract_range_for_var_from_comparison_expr to compute the case_range + /* If it's not the first condition, then we need a BB without + any statements. */ + if (!first) + { + unsigned stmt_count = 0; + for (gimple_stmt_iterator gsi = gsi_start_nondebug_bb (bb); + !gsi_end_p (gsi); gsi_next_nondebug (&gsi)) + ++stmt_count; + + if (stmt_count - visited_stmt_count != 0) + break; hmm, OK, this might be a bit iffy to get correct then, still it's a lot of pattern maching code that is there elsewhere already. ifcombine simply hoists any stmts without side-effects up the dominator tree and thus only requires BBs without side-effects (IIRC there's a predicate fn for that). + /* Prevent loosing information for a PHI node where 2 edges will + be folded into one. Note that we must do the same also for false_edge + (for last BB in a if-elseif chain). */ + if (!chain->record_phi_arguments (true_edge) + || !chain->record_phi_arguments (false_edge)) I don't really get this - looking at record_phi_arguments it seems we're requiring that all edges into the same PHI from inside the case (irrespective of from which case label) have the same value for the PHI arg? + if (arg != *v) + return false; should use operand_equal_p at least, REAL_CSTs are for example not shared tree nodes. I'll also notice that if record_phi_arguments fails we still may have altered its hash-map even though the particular edge will not participate in the current chain, so it will affect other chains ending in the same BB. Overall this looks a bit too conservative (and random, based on visiting order). + expanded_location loc + = expand_location (gimple_location (chain->m_first_condition)); + if (dump_file) + { + fprintf (dump_file, "Condition chain (at %s:%d) with %d conditions " + "(%d BBs) transformed into a switch statement.\n", + loc.file, loc.line, total_case_values, + chain->m_entries.length ()); Use dump_printf_loc and you can pass a gimple * stmt as location. + /* Follow if-elseif-elseif chain. */ + bb = false_edge->dest; so that means the code doesn't handle a tree, right? But what makes us sure the chain doesn't continue on the true_edge instead, guess this degenerate tree isn't handled either. I was thinking on whether doing the switch discovery in a reverse CFG walk, recording for each BB what case_range(s) it represents for a particular variable(s) so when visiting a dominator you can quickly figure what's the relevant children (true, false or both). It would also make the matching a BB-local operation where you'd do the case_label discovery based on the single-pred BBs gimple-cond. + output = bit_test_cluster::find_bit_tests (filtered_clusters); + r = output.length () < filtered_clusters.length (); + if (r) + dump_clusters (&output, "BT can be built"); so as of the very above comment - this might be guarded with flag_tree_switch_conversion? As mentioned previously I would have liked to see if-to-switch integrated with switch-conversion, having separate passes is somewhat awkward (for example the redundant and possibly expensive find_bit_tests). + /* Move all statements from the BB to the BB with gswitch. */ + auto_vec<gimple *> stmts; + for (gimple_stmt_iterator gsi = gsi_start_bb (entry.m_bb); + !gsi_end_p (gsi); gsi_next (&gsi)) + { + gimple *stmt = gsi_stmt (gsi); + if (gimple_code (stmt) != GIMPLE_COND) + stmts.safe_push (stmt); + } + + for (unsigned i = 0; i < stmts.length (); i++) + { + gimple_stmt_iterator gsi_from = gsi_for_stmt (stmts[i]); + gsi_move_before (&gsi_from, &gsi); + } so you are already hoisting all stmts ... + make_edge (first_cond.m_bb, case_bb, 0); and if this doesn't create a new edge you need equivalent PHI args in the case_bb. To remove this restriction you "only" have to add a forwarder. Sth like edge e = make_edge (...); if (!e) { bb = create_basic_block (); make_edge (first_cond.m_bb, bb, 0); e = make_edge (bb, case_bb, 0); } fill PHI arg of 'e' from original value (no need to create the hash-map then) Richard. > Martin ^ permalink raw reply [flat|nested] 49+ messages in thread
* Re: [PATCH] Add if-chain to switch conversion pass. 2020-09-24 12:41 ` Richard Biener @ 2020-09-25 14:05 ` Martin Liška 2020-09-29 8:46 ` Richard Biener 2020-10-02 13:23 ` Martin Liška 1 sibling, 1 reply; 49+ messages in thread From: Martin Liška @ 2020-09-25 14:05 UTC (permalink / raw) To: Richard Biener Cc: David Malcolm, Jakub Jelinek, kazu, GCC Patches, Jan Hubicka On 9/24/20 2:41 PM, Richard Biener wrote: > On Wed, Sep 2, 2020 at 1:53 PM Martin Liška <mliska@suse.cz> wrote: >> >> On 9/1/20 4:50 PM, David Malcolm wrote: >>> Hope this is constructive >>> Dave >> >> Thank you David. All of them very very useful! >> >> There's updated version of the patch. Hey. What a juicy patch review! > > I noticed several functions without a function-level comment. Yep, but several of them are documented in a class declaration. Anyway, I will improve for the next time. > > - cluster (tree case_label_expr, basic_block case_bb, profile_probability prob, > - profile_probability subtree_prob); > + inline cluster (tree case_label_expr, basic_block case_bb, > + profile_probability prob, profile_probability subtree_prob); > > I thought we generally leave this to the compiler ... > > +@item -fconvert-if-to-switch > +@opindex fconvert-if-to-switch > +Perform conversion of an if cascade into a switch statement. > +Do so if the switch can be later transformed using a jump table > +or a bit test. The transformation can help to produce faster code for > +the switch statement. This flag is enabled by default > +at @option{-O2} and higher. > > this mentions we do this only when we later can convert the > switch again but both passes (we still have two :/) have > independent guards. Yes, we have the option for jump tables (-jump-tables), but we miss one for a bit-test. Moreover, as mentioned in the cover email, one can see it beneficial to convert a if-chain to switch as the expansion (without any BT and JT) can benefit from balanced tree. > > + /* For now, just wipe the dominator information. */ > + free_dominance_info (CDI_DOMINATORS); > > could at least be conditional on the vop renaming condition... > > + if (!all_candidates.is_empty ()) > + mark_virtual_operands_for_renaming (fun); Yep. > > + if (bitmap_bit_p (*visited_bbs, bb->index)) > + break; > + bitmap_set_bit (*visited_bbs, bb->index); > > since you are using a bitmap and not a sbitmap (why?) > you can combine those into New to me, thanks. > > if (!bitmap_set_bit (*visited_bbs, bb->index)) > break; > > + /* Current we support following patterns (situations): > + > + 1) if condition with equal operation: > + > ... > > did you see whether using > > register_edge_assert_for (lhs, true_edge, code, lhs, rhs, asserts); > > works equally well? It fills the 'asserts' vector with relations > derived from 'lhs'. There's also > vr_values::extract_range_for_var_from_comparison_expr > to compute the case_range Good point! I must admit that my patch doesn't properly handle negative conditions: if (argc != 11111) { if (argc == 1) global = 222; ... } which can VRP correctly identify as anti-range: int ~[11111, 11111] EQUIVALENCES: { argc_8(D) } (1 elements)$1 = void I have question about OR and AND conditions: <bb 2> : _1 = aChar_8(D) == 1; _2 = aChar_8(D) == 10; _3 = _1 | _2; if (_3 != 0) goto <bb 6>; [INV] else goto <bb 3>; [INV] <bb 2> : _1 = aChar_8(D) != 1; _2 = aChar_8(D) != 10; _3 = _1 & _2; if (_3 != 0) goto <bb 6>; [INV] else goto <bb 3>; [INV] Can I somehow get that from VRP (as I ask register_edge_assert_for only for LHS of a condition)? > > + /* If it's not the first condition, then we need a BB without > + any statements. */ > + if (!first) > + { > + unsigned stmt_count = 0; > + for (gimple_stmt_iterator gsi = gsi_start_nondebug_bb (bb); > + !gsi_end_p (gsi); gsi_next_nondebug (&gsi)) > + ++stmt_count; > + > + if (stmt_count - visited_stmt_count != 0) > + break; > > hmm, OK, this might be a bit iffy to get correct then, still it's a lot > of pattern maching code that is there elsewhere already. > ifcombine simply hoists any stmts without side-effects up the > dominator tree and thus only requires BBs without side-effects > (IIRC there's a predicate fn for that). Yes, I completely miss support for code hoisting (expect first BB where we put gswitch). If I'm correct hoisting should be possible where case destination should be a new BB that will contain original statements and then it will jump to a case destination block. > > + /* Prevent loosing information for a PHI node where 2 edges will > + be folded into one. Note that we must do the same also for false_edge > + (for last BB in a if-elseif chain). */ > + if (!chain->record_phi_arguments (true_edge) > + || !chain->record_phi_arguments (false_edge)) > > I don't really get this - looking at record_phi_arguments it seems > we're requiring that all edges into the same PHI from inside the case > (irrespective of from which case label) have the same value for the > PHI arg? I guess so, I'll refresh the functionality. > > + if (arg != *v) > + return false; > > should use operand_equal_p at least, REAL_CSTs are for example > not shared tree nodes. I'll also notice that if record_phi_arguments > fails we still may have altered its hash-map even though the particular > edge will not participate in the current chain, so it will affect other > chains ending in the same BB. Overall this looks a bit too conservative > (and random, based on visiting order). Oh, yes, it's not properly cleared once we bail out for a particular chain. > > + expanded_location loc > + = expand_location (gimple_location (chain->m_first_condition)); > + if (dump_file) > + { > + fprintf (dump_file, "Condition chain (at %s:%d) with %d conditions " > + "(%d BBs) transformed into a switch statement.\n", > + loc.file, loc.line, total_case_values, > + chain->m_entries.length ()); > > Use dump_printf_loc and you can pass a gimple * stmt as location. > > + /* Follow if-elseif-elseif chain. */ > + bb = false_edge->dest; > > so that means the code doesn't handle a tree, right? But what > makes us sure the chain doesn't continue on the true_edge instead, > guess this degenerate tree isn't handled either. As mentioned earlier, I didn't consider VAR != CST type of conditions that makes it more complicated. > > I was thinking on whether doing the switch discovery in a reverse > CFG walk, recording for each BB what case_range(s) it represents > for a particular variable(s) so when visiting a dominator you > can quickly figure what's the relevant children (true, false or both). Sounds promising. Note that right now we do not support overlapping cases like: if (5 <= argc && argc <= 10) foo (); else if (6 <= argc && argc <= 100) foo (); So I'm wondering if we can support 2 children? > It would also make the matching a BB-local operation where you'd > do the case_label discovery based on the single-pred BBs gimple-cond. Can you please describe more how will the walk work? > > + output = bit_test_cluster::find_bit_tests (filtered_clusters); > + r = output.length () < filtered_clusters.length (); > + if (r) > + dump_clusters (&output, "BT can be built"); > > so as of the very above comment - this might be guarded with > flag_tree_switch_conversion? flag_tree_switch_conversion isn't connected to the if-chain pass (yet). > > As mentioned previously I would have liked to see if-to-switch > integrated with switch-conversion, having separate passes is > somewhat awkward (for example the redundant and possibly > expensive find_bit_tests). Well, the CFG transformation for BT and JT is not trivial and I would like to go in the first iteration through gswitch statements. I have a massive speed up for the find_bit_tests/find_jump_tables. > > + /* Move all statements from the BB to the BB with gswitch. */ > + auto_vec<gimple *> stmts; > + for (gimple_stmt_iterator gsi = gsi_start_bb (entry.m_bb); > + !gsi_end_p (gsi); gsi_next (&gsi)) > + { > + gimple *stmt = gsi_stmt (gsi); > + if (gimple_code (stmt) != GIMPLE_COND) > + stmts.safe_push (stmt); > + } > + > + for (unsigned i = 0; i < stmts.length (); i++) > + { > + gimple_stmt_iterator gsi_from = gsi_for_stmt (stmts[i]); > + gsi_move_before (&gsi_from, &gsi); > + } > > so you are already hoisting all stmts ... As mentioned, it's not supported right now. This moves all these kind of "temp" statements: _1 = aChar_8(D) == 1; _2 = aChar_8(D) == 10; _3 = _1 | _2; Martin > > + make_edge (first_cond.m_bb, case_bb, 0); > > and if this doesn't create a new edge you need equivalent PHI > args in the case_bb. To remove this restriction you "only" > have to add a forwarder. Sth like > > edge e = make_edge (...); > if (!e) > { > bb = create_basic_block (); > make_edge (first_cond.m_bb, bb, 0); > e = make_edge (bb, case_bb, 0); > } > fill PHI arg of 'e' from original value (no need to create the hash-map then) > > Richard. > > >> Martin ^ permalink raw reply [flat|nested] 49+ messages in thread
* Re: [PATCH] Add if-chain to switch conversion pass. 2020-09-25 14:05 ` Martin Liška @ 2020-09-29 8:46 ` Richard Biener 2020-10-02 13:26 ` Martin Liška 0 siblings, 1 reply; 49+ messages in thread From: Richard Biener @ 2020-09-29 8:46 UTC (permalink / raw) To: Martin Liška Cc: David Malcolm, Jakub Jelinek, kazu, GCC Patches, Jan Hubicka On Fri, Sep 25, 2020 at 4:05 PM Martin Liška <mliska@suse.cz> wrote: > > On 9/24/20 2:41 PM, Richard Biener wrote: > > On Wed, Sep 2, 2020 at 1:53 PM Martin Liška <mliska@suse.cz> wrote: > >> > >> On 9/1/20 4:50 PM, David Malcolm wrote: > >>> Hope this is constructive > >>> Dave > >> > >> Thank you David. All of them very very useful! > >> > >> There's updated version of the patch. > > Hey. > > What a juicy patch review! > > > > > I noticed several functions without a function-level comment. > > Yep, but several of them are documented in a class declaration. Anyway, I will > improve for the next time. > > > > > - cluster (tree case_label_expr, basic_block case_bb, profile_probability prob, > > - profile_probability subtree_prob); > > + inline cluster (tree case_label_expr, basic_block case_bb, > > + profile_probability prob, profile_probability subtree_prob); > > > > I thought we generally leave this to the compiler ... > > > > +@item -fconvert-if-to-switch > > +@opindex fconvert-if-to-switch > > +Perform conversion of an if cascade into a switch statement. > > +Do so if the switch can be later transformed using a jump table > > +or a bit test. The transformation can help to produce faster code for > > +the switch statement. This flag is enabled by default > > +at @option{-O2} and higher. > > > > this mentions we do this only when we later can convert the > > switch again but both passes (we still have two :/) have > > independent guards. > > Yes, we have the option for jump tables (-jump-tables), but we miss one for a bit-test. > Moreover, as mentioned in the cover email, one can see it beneficial to convert a if-chain > to switch as the expansion (without any BT and JT) can benefit from balanced tree. > > > > > + /* For now, just wipe the dominator information. */ > > + free_dominance_info (CDI_DOMINATORS); > > > > could at least be conditional on the vop renaming condition... > > > > + if (!all_candidates.is_empty ()) > > + mark_virtual_operands_for_renaming (fun); > > Yep. > > > > > + if (bitmap_bit_p (*visited_bbs, bb->index)) > > + break; > > + bitmap_set_bit (*visited_bbs, bb->index); > > > > since you are using a bitmap and not a sbitmap (why?) > > you can combine those into > > New to me, thanks. > > > > > if (!bitmap_set_bit (*visited_bbs, bb->index)) > > break; > > > > + /* Current we support following patterns (situations): > > + > > + 1) if condition with equal operation: > > + > > ... > > > > did you see whether using > > > > register_edge_assert_for (lhs, true_edge, code, lhs, rhs, asserts); > > > > works equally well? It fills the 'asserts' vector with relations > > derived from 'lhs'. There's also > > vr_values::extract_range_for_var_from_comparison_expr > > to compute the case_range > > Good point! I must admit that my patch doesn't properly handle negative conditions: > > if (argc != 11111) > { > if (argc == 1) > global = 222; > ... > } > > which can VRP correctly identify as anti-range: > int ~[11111, 11111] EQUIVALENCES: { argc_8(D) } (1 elements)$1 = void > > I have question about OR and AND conditions: > > <bb 2> : > _1 = aChar_8(D) == 1; > _2 = aChar_8(D) == 10; > _3 = _1 | _2; > if (_3 != 0) > goto <bb 6>; [INV] > else > goto <bb 3>; [INV] > > <bb 2> : > _1 = aChar_8(D) != 1; > _2 = aChar_8(D) != 10; > _3 = _1 & _2; > if (_3 != 0) > goto <bb 6>; [INV] > else > goto <bb 3>; [INV] > > Can I somehow get that from VRP (as I ask register_edge_assert_for only for LHS > of a condition)? Yes, you simply get all sorts of conditions that hold when a condition is true, not just those based on the SSA name you put in. But it occured to me that the use-case is somewhat different - for switch-conversion you want to know whether the test _exactly_ matches a range test, the VRP worker will not tell you that. For example if you had if (x && a > 3 && a < 7) then it will give you 'a in [4, 6]' and it might not give you 'x in [1, 1]' (for example if x is float). But that's required for correctness. So we're back to your custom crafted code unless we manage to somehow refactor the VRP condition analysis to handle both cases (should be possible I think, but have not looked too closely). Maybe the actual matching pieces can be shared at least. > > > > + /* If it's not the first condition, then we need a BB without > > + any statements. */ > > + if (!first) > > + { > > + unsigned stmt_count = 0; > > + for (gimple_stmt_iterator gsi = gsi_start_nondebug_bb (bb); > > + !gsi_end_p (gsi); gsi_next_nondebug (&gsi)) > > + ++stmt_count; > > + > > + if (stmt_count - visited_stmt_count != 0) > > + break; > > > > hmm, OK, this might be a bit iffy to get correct then, still it's a lot > > of pattern maching code that is there elsewhere already. > > ifcombine simply hoists any stmts without side-effects up the > > dominator tree and thus only requires BBs without side-effects > > (IIRC there's a predicate fn for that). > > Yes, I completely miss support for code hoisting (expect first BB where we put gswitch). > If I'm correct hoisting should be possible where case destination should be a new BB > that will contain original statements and then it will jump to a case destination block. > > > > > + /* Prevent loosing information for a PHI node where 2 edges will > > + be folded into one. Note that we must do the same also for false_edge > > + (for last BB in a if-elseif chain). */ > > + if (!chain->record_phi_arguments (true_edge) > > + || !chain->record_phi_arguments (false_edge)) > > > > I don't really get this - looking at record_phi_arguments it seems > > we're requiring that all edges into the same PHI from inside the case > > (irrespective of from which case label) have the same value for the > > PHI arg? > > I guess so, I'll refresh the functionality. > > > > > + if (arg != *v) > > + return false; > > > > should use operand_equal_p at least, REAL_CSTs are for example > > not shared tree nodes. I'll also notice that if record_phi_arguments > > fails we still may have altered its hash-map even though the particular > > edge will not participate in the current chain, so it will affect other > > chains ending in the same BB. Overall this looks a bit too conservative > > (and random, based on visiting order). > > Oh, yes, it's not properly cleared once we bail out for a particular chain. > > > > > + expanded_location loc > > + = expand_location (gimple_location (chain->m_first_condition)); > > + if (dump_file) > > + { > > + fprintf (dump_file, "Condition chain (at %s:%d) with %d conditions " > > + "(%d BBs) transformed into a switch statement.\n", > > + loc.file, loc.line, total_case_values, > > + chain->m_entries.length ()); > > > > Use dump_printf_loc and you can pass a gimple * stmt as location. > > > > + /* Follow if-elseif-elseif chain. */ > > + bb = false_edge->dest; > > > > so that means the code doesn't handle a tree, right? But what > > makes us sure the chain doesn't continue on the true_edge instead, > > guess this degenerate tree isn't handled either. > > As mentioned earlier, I didn't consider VAR != CST type of conditions that > makes it more complicated. > > > > > I was thinking on whether doing the switch discovery in a reverse > > CFG walk, recording for each BB what case_range(s) it represents > > for a particular variable(s) so when visiting a dominator you > > can quickly figure what's the relevant children (true, false or both). > > Sounds promising. Note that right now we do not support overlapping cases like: > > if (5 <= argc && argc <= 10) > foo (); > else if (6 <= argc && argc <= 100) > foo (); > > So I'm wondering if we can support 2 children? > > > It would also make the matching a BB-local operation where you'd > > do the case_label discovery based on the single-pred BBs gimple-cond. > > Can you please describe more how will the walk work? > > > > > + output = bit_test_cluster::find_bit_tests (filtered_clusters); > > + r = output.length () < filtered_clusters.length (); > > + if (r) > > + dump_clusters (&output, "BT can be built"); > > > > so as of the very above comment - this might be guarded with > > flag_tree_switch_conversion? > > flag_tree_switch_conversion isn't connected to the if-chain pass (yet). > > > > > As mentioned previously I would have liked to see if-to-switch > > integrated with switch-conversion, having separate passes is > > somewhat awkward (for example the redundant and possibly > > expensive find_bit_tests). > > Well, the CFG transformation for BT and JT is not trivial and I would like > to go in the first iteration through gswitch statements. > I have a massive speed up for the find_bit_tests/find_jump_tables. > > > > > + /* Move all statements from the BB to the BB with gswitch. */ > > + auto_vec<gimple *> stmts; > > + for (gimple_stmt_iterator gsi = gsi_start_bb (entry.m_bb); > > + !gsi_end_p (gsi); gsi_next (&gsi)) > > + { > > + gimple *stmt = gsi_stmt (gsi); > > + if (gimple_code (stmt) != GIMPLE_COND) > > + stmts.safe_push (stmt); > > + } > > + > > + for (unsigned i = 0; i < stmts.length (); i++) > > + { > > + gimple_stmt_iterator gsi_from = gsi_for_stmt (stmts[i]); > > + gsi_move_before (&gsi_from, &gsi); > > + } > > > > so you are already hoisting all stmts ... > > As mentioned, it's not supported right now. This moves all these kind of "temp" statements: > > _1 = aChar_8(D) == 1; > _2 = aChar_8(D) == 10; > _3 = _1 | _2; Sure, but that _is_ hoisting of all stmts. > Martin > > > > > + make_edge (first_cond.m_bb, case_bb, 0); > > > > and if this doesn't create a new edge you need equivalent PHI > > args in the case_bb. To remove this restriction you "only" > > have to add a forwarder. Sth like > > > > edge e = make_edge (...); > > if (!e) > > { > > bb = create_basic_block (); > > make_edge (first_cond.m_bb, bb, 0); > > e = make_edge (bb, case_bb, 0); > > } > > fill PHI arg of 'e' from original value (no need to create the hash-map then) > > > > Richard. > > > > > >> Martin > ^ permalink raw reply [flat|nested] 49+ messages in thread
* Re: [PATCH] Add if-chain to switch conversion pass. 2020-09-29 8:46 ` Richard Biener @ 2020-10-02 13:26 ` Martin Liška 2020-10-02 14:19 ` Andrew MacLeod 0 siblings, 1 reply; 49+ messages in thread From: Martin Liška @ 2020-10-02 13:26 UTC (permalink / raw) To: Richard Biener Cc: David Malcolm, Jakub Jelinek, Andrew MacLeod, GCC Patches, Jan Hubicka, Aldy Hernandez On 9/29/20 10:46 AM, Richard Biener wrote: > On Fri, Sep 25, 2020 at 4:05 PM Martin Liška <mliska@suse.cz> wrote: >> >> On 9/24/20 2:41 PM, Richard Biener wrote: >>> On Wed, Sep 2, 2020 at 1:53 PM Martin Liška <mliska@suse.cz> wrote: >>>> >>>> On 9/1/20 4:50 PM, David Malcolm wrote: >>>>> Hope this is constructive >>>>> Dave >>>> >>>> Thank you David. All of them very very useful! >>>> >>>> There's updated version of the patch. >> >> Hey. >> >> What a juicy patch review! >> >>> >>> I noticed several functions without a function-level comment. >> >> Yep, but several of them are documented in a class declaration. Anyway, I will >> improve for the next time. >> >>> >>> - cluster (tree case_label_expr, basic_block case_bb, profile_probability prob, >>> - profile_probability subtree_prob); >>> + inline cluster (tree case_label_expr, basic_block case_bb, >>> + profile_probability prob, profile_probability subtree_prob); >>> >>> I thought we generally leave this to the compiler ... >>> >>> +@item -fconvert-if-to-switch >>> +@opindex fconvert-if-to-switch >>> +Perform conversion of an if cascade into a switch statement. >>> +Do so if the switch can be later transformed using a jump table >>> +or a bit test. The transformation can help to produce faster code for >>> +the switch statement. This flag is enabled by default >>> +at @option{-O2} and higher. >>> >>> this mentions we do this only when we later can convert the >>> switch again but both passes (we still have two :/) have >>> independent guards. >> >> Yes, we have the option for jump tables (-jump-tables), but we miss one for a bit-test. >> Moreover, as mentioned in the cover email, one can see it beneficial to convert a if-chain >> to switch as the expansion (without any BT and JT) can benefit from balanced tree. >> >>> >>> + /* For now, just wipe the dominator information. */ >>> + free_dominance_info (CDI_DOMINATORS); >>> >>> could at least be conditional on the vop renaming condition... >>> >>> + if (!all_candidates.is_empty ()) >>> + mark_virtual_operands_for_renaming (fun); >> >> Yep. >> >>> >>> + if (bitmap_bit_p (*visited_bbs, bb->index)) >>> + break; >>> + bitmap_set_bit (*visited_bbs, bb->index); >>> >>> since you are using a bitmap and not a sbitmap (why?) >>> you can combine those into >> >> New to me, thanks. >> >>> >>> if (!bitmap_set_bit (*visited_bbs, bb->index)) >>> break; >>> >>> + /* Current we support following patterns (situations): >>> + >>> + 1) if condition with equal operation: >>> + >>> ... >>> >>> did you see whether using >>> >>> register_edge_assert_for (lhs, true_edge, code, lhs, rhs, asserts); >>> >>> works equally well? It fills the 'asserts' vector with relations >>> derived from 'lhs'. There's also >>> vr_values::extract_range_for_var_from_comparison_expr >>> to compute the case_range >> >> Good point! I must admit that my patch doesn't properly handle negative conditions: >> >> if (argc != 11111) >> { >> if (argc == 1) >> global = 222; >> ... >> } >> >> which can VRP correctly identify as anti-range: >> int ~[11111, 11111] EQUIVALENCES: { argc_8(D) } (1 elements)$1 = void >> >> I have question about OR and AND conditions: >> >> <bb 2> : >> _1 = aChar_8(D) == 1; >> _2 = aChar_8(D) == 10; >> _3 = _1 | _2; >> if (_3 != 0) >> goto <bb 6>; [INV] >> else >> goto <bb 3>; [INV] >> >> <bb 2> : >> _1 = aChar_8(D) != 1; >> _2 = aChar_8(D) != 10; >> _3 = _1 & _2; >> if (_3 != 0) >> goto <bb 6>; [INV] >> else >> goto <bb 3>; [INV] >> >> Can I somehow get that from VRP (as I ask register_edge_assert_for only for LHS >> of a condition)? > > Yes, you simply get all sorts of conditions that hold when a condition is > true, not just those based on the SSA name you put in. But it occured > to me that the use-case is somewhat different - for switch-conversion > you want to know whether the test _exactly_ matches a range test, > the VRP worker will not tell you that. For example if you had > if (x && a > 3 && a < 7) then it will give you 'a in [4, 6]' and it might > not give you 'x in [1, 1]' (for example if x is float). But that's required > for correctness. Hello. Adding Ranger guys. Is it something that can be handled by the upcoming changes in VRP? > > So we're back to your custom crafted code unless we manage to somehow > refactor the VRP condition analysis to handle both cases (should be > possible I think, but have not looked too closely). Maybe the actual > matching pieces can be shared at least. > >>> >>> + /* If it's not the first condition, then we need a BB without >>> + any statements. */ >>> + if (!first) >>> + { >>> + unsigned stmt_count = 0; >>> + for (gimple_stmt_iterator gsi = gsi_start_nondebug_bb (bb); >>> + !gsi_end_p (gsi); gsi_next_nondebug (&gsi)) >>> + ++stmt_count; >>> + >>> + if (stmt_count - visited_stmt_count != 0) >>> + break; >>> >>> hmm, OK, this might be a bit iffy to get correct then, still it's a lot >>> of pattern maching code that is there elsewhere already. >>> ifcombine simply hoists any stmts without side-effects up the >>> dominator tree and thus only requires BBs without side-effects >>> (IIRC there's a predicate fn for that). >> >> Yes, I completely miss support for code hoisting (expect first BB where we put gswitch). >> If I'm correct hoisting should be possible where case destination should be a new BB >> that will contain original statements and then it will jump to a case destination block. >> >>> >>> + /* Prevent loosing information for a PHI node where 2 edges will >>> + be folded into one. Note that we must do the same also for false_edge >>> + (for last BB in a if-elseif chain). */ >>> + if (!chain->record_phi_arguments (true_edge) >>> + || !chain->record_phi_arguments (false_edge)) >>> >>> I don't really get this - looking at record_phi_arguments it seems >>> we're requiring that all edges into the same PHI from inside the case >>> (irrespective of from which case label) have the same value for the >>> PHI arg? >> >> I guess so, I'll refresh the functionality. >> >>> >>> + if (arg != *v) >>> + return false; >>> >>> should use operand_equal_p at least, REAL_CSTs are for example >>> not shared tree nodes. I'll also notice that if record_phi_arguments >>> fails we still may have altered its hash-map even though the particular >>> edge will not participate in the current chain, so it will affect other >>> chains ending in the same BB. Overall this looks a bit too conservative >>> (and random, based on visiting order). >> >> Oh, yes, it's not properly cleared once we bail out for a particular chain. >> >>> >>> + expanded_location loc >>> + = expand_location (gimple_location (chain->m_first_condition)); >>> + if (dump_file) >>> + { >>> + fprintf (dump_file, "Condition chain (at %s:%d) with %d conditions " >>> + "(%d BBs) transformed into a switch statement.\n", >>> + loc.file, loc.line, total_case_values, >>> + chain->m_entries.length ()); >>> >>> Use dump_printf_loc and you can pass a gimple * stmt as location. >>> >>> + /* Follow if-elseif-elseif chain. */ >>> + bb = false_edge->dest; >>> >>> so that means the code doesn't handle a tree, right? But what >>> makes us sure the chain doesn't continue on the true_edge instead, >>> guess this degenerate tree isn't handled either. >> >> As mentioned earlier, I didn't consider VAR != CST type of conditions that >> makes it more complicated. >> >>> >>> I was thinking on whether doing the switch discovery in a reverse >>> CFG walk, recording for each BB what case_range(s) it represents >>> for a particular variable(s) so when visiting a dominator you >>> can quickly figure what's the relevant children (true, false or both). >> >> Sounds promising. Note that right now we do not support overlapping cases like: >> >> if (5 <= argc && argc <= 10) >> foo (); >> else if (6 <= argc && argc <= 100) >> foo (); >> >> So I'm wondering if we can support 2 children? >> >>> It would also make the matching a BB-local operation where you'd >>> do the case_label discovery based on the single-pred BBs gimple-cond. >> >> Can you please describe more how will the walk work? >> >>> >>> + output = bit_test_cluster::find_bit_tests (filtered_clusters); >>> + r = output.length () < filtered_clusters.length (); >>> + if (r) >>> + dump_clusters (&output, "BT can be built"); >>> >>> so as of the very above comment - this might be guarded with >>> flag_tree_switch_conversion? >> >> flag_tree_switch_conversion isn't connected to the if-chain pass (yet). >> >>> >>> As mentioned previously I would have liked to see if-to-switch >>> integrated with switch-conversion, having separate passes is >>> somewhat awkward (for example the redundant and possibly >>> expensive find_bit_tests). >> >> Well, the CFG transformation for BT and JT is not trivial and I would like >> to go in the first iteration through gswitch statements. >> I have a massive speed up for the find_bit_tests/find_jump_tables. >> >>> >>> + /* Move all statements from the BB to the BB with gswitch. */ >>> + auto_vec<gimple *> stmts; >>> + for (gimple_stmt_iterator gsi = gsi_start_bb (entry.m_bb); >>> + !gsi_end_p (gsi); gsi_next (&gsi)) >>> + { >>> + gimple *stmt = gsi_stmt (gsi); >>> + if (gimple_code (stmt) != GIMPLE_COND) >>> + stmts.safe_push (stmt); >>> + } >>> + >>> + for (unsigned i = 0; i < stmts.length (); i++) >>> + { >>> + gimple_stmt_iterator gsi_from = gsi_for_stmt (stmts[i]); >>> + gsi_move_before (&gsi_from, &gsi); >>> + } >>> >>> so you are already hoisting all stmts ... >> >> As mentioned, it's not supported right now. This moves all these kind of "temp" statements: >> >> _1 = aChar_8(D) == 1; >> _2 = aChar_8(D) == 10; >> _3 = _1 | _2; > > Sure, but that _is_ hoisting of all stmts. No, hoisting for a real statement would break chain recognition by this code: /* If it's not the first condition, then we need a BB without any statements. */ if (!first) { unsigned stmt_count = 0; for (gimple_stmt_iterator gsi = gsi_start_nondebug_bb (bb); !gsi_end_p (gsi); gsi_next_nondebug (&gsi)) ++stmt_count; if (stmt_count - visited_stmt_count != 0) break; } Martin > >> Martin >> >>> >>> + make_edge (first_cond.m_bb, case_bb, 0); >>> >>> and if this doesn't create a new edge you need equivalent PHI >>> args in the case_bb. To remove this restriction you "only" >>> have to add a forwarder. Sth like >>> >>> edge e = make_edge (...); >>> if (!e) >>> { >>> bb = create_basic_block (); >>> make_edge (first_cond.m_bb, bb, 0); >>> e = make_edge (bb, case_bb, 0); >>> } >>> fill PHI arg of 'e' from original value (no need to create the hash-map then) >>> >>> Richard. >>> >>> >>>> Martin >> ^ permalink raw reply [flat|nested] 49+ messages in thread
* Re: [PATCH] Add if-chain to switch conversion pass. 2020-10-02 13:26 ` Martin Liška @ 2020-10-02 14:19 ` Andrew MacLeod 2020-10-06 12:09 ` Martin Liška 0 siblings, 1 reply; 49+ messages in thread From: Andrew MacLeod @ 2020-10-02 14:19 UTC (permalink / raw) To: Martin Liška, Richard Biener Cc: David Malcolm, Jakub Jelinek, GCC Patches, Jan Hubicka, Aldy Hernandez On 10/2/20 9:26 AM, Martin Liška wrote: >> Yes, you simply get all sorts of conditions that hold when a >> condition is >> true, not just those based on the SSA name you put in. But it occured >> to me that the use-case is somewhat different - for switch-conversion >> you want to know whether the test _exactly_ matches a range test, >> the VRP worker will not tell you that. For example if you had >> if (x && a > 3 && a < 7) then it will give you 'a in [4, 6]' and it >> might >> not give you 'x in [1, 1]' (for example if x is float). But that's >> required >> for correctness. > > Hello. > > Adding Ranger guys. Is it something that can be handled by the > upcoming changes in VRP? Presumably. It depends on exactly how the code lays out. We dont process floats, so we wont know anything about the float (at least this release :-). We will sort through complex logicals and tell you what we do know, so if x is integral if (x && a > 3 && a < 7) will give you, on the final true edge: x_5(D) int [-INF, -1][1, +INF] a_6(D) int [4, 6] IF x is a float, then we wont give you anything for x obviously, but on the eventual true edge we'd still give you a_6(D) int [4, 6] Andrew ^ permalink raw reply [flat|nested] 49+ messages in thread
* Re: [PATCH] Add if-chain to switch conversion pass. 2020-10-02 14:19 ` Andrew MacLeod @ 2020-10-06 12:09 ` Martin Liška 2020-10-06 12:56 ` Andrew MacLeod 0 siblings, 1 reply; 49+ messages in thread From: Martin Liška @ 2020-10-06 12:09 UTC (permalink / raw) To: Andrew MacLeod, Richard Biener Cc: David Malcolm, Jakub Jelinek, GCC Patches, Jan Hubicka, Aldy Hernandez On 10/2/20 4:19 PM, Andrew MacLeod wrote: > On 10/2/20 9:26 AM, Martin Liška wrote: >>> Yes, you simply get all sorts of conditions that hold when a condition is >>> true, not just those based on the SSA name you put in. But it occured >>> to me that the use-case is somewhat different - for switch-conversion >>> you want to know whether the test _exactly_ matches a range test, >>> the VRP worker will not tell you that. For example if you had >>> if (x && a > 3 && a < 7) then it will give you 'a in [4, 6]' and it might >>> not give you 'x in [1, 1]' (for example if x is float). But that's required >>> for correctness. >> >> Hello. >> >> Adding Ranger guys. Is it something that can be handled by the upcoming changes in VRP? > > Presumably. It depends on exactly how the code lays out. We dont process floats, so we wont know anything about the float (at least this release :-). We will sort through complex logicals and tell you what we do know, so if x is integral > > > if (x && a > 3 && a < 7) > > will give you, on the final true edge: > > x_5(D) int [-INF, -1][1, +INF] > a_6(D) int [4, 6] > > > IF x is a float, then we wont give you anything for x obviously, but on the eventual true edge we'd still give you > a_6(D) int [4, 6] Which is an acceptable limitation for me. However, I can't convince ranger to give me a proper ranges for. I'm using the following code snippet: outgoing_range query; edge e; edge_iterator ei; FOR_EACH_EDGE (e, ei, bb->succs) { int_range_max range; if (query.edge_range_p (range, e)) { if (dump_file) { fprintf (dump_file, "%d->%d: ", e->src->index, e->dest->index); range.dump(dump_file); fprintf (dump_file, "\n"); } } } if (9 <= index && index <= 123) return 123; <bb 2> : index.0_1 = (unsigned int) index_5(D); _2 = index.0_1 + 4294967287; if (_2 <= 114) goto <bb 3>; [INV] else goto <bb 4>; [INV] I get: 2->3: _Bool [1, 1] 2->4: _Bool [0, 0] Can I get to index_5 [9, 123] ? Thanks, Martin > > > Andrew > > > ^ permalink raw reply [flat|nested] 49+ messages in thread
* Re: [PATCH] Add if-chain to switch conversion pass. 2020-10-06 12:09 ` Martin Liška @ 2020-10-06 12:56 ` Andrew MacLeod 2020-10-06 13:09 ` Martin Liška 0 siblings, 1 reply; 49+ messages in thread From: Andrew MacLeod @ 2020-10-06 12:56 UTC (permalink / raw) To: Martin Liška, Richard Biener Cc: David Malcolm, Jakub Jelinek, GCC Patches, Jan Hubicka, Aldy Hernandez On 10/6/20 8:09 AM, Martin Liška wrote: > On 10/2/20 4:19 PM, Andrew MacLeod wrote: >> On 10/2/20 9:26 AM, Martin Liška wrote: >>>> Yes, you simply get all sorts of conditions that hold when a >>>> condition is >>>> true, not just those based on the SSA name you put in. But it occured >>>> to me that the use-case is somewhat different - for switch-conversion >>>> you want to know whether the test _exactly_ matches a range test, >>>> the VRP worker will not tell you that. For example if you had >>>> if (x && a > 3 && a < 7) then it will give you 'a in [4, 6]' and >>>> it might >>>> not give you 'x in [1, 1]' (for example if x is float). But that's >>>> required >>>> for correctness. >>> >>> Hello. >>> >>> Adding Ranger guys. Is it something that can be handled by the >>> upcoming changes in VRP? >> >> Presumably. It depends on exactly how the code lays out. We dont >> process floats, so we wont know anything about the float (at least >> this release :-). We will sort through complex logicals and tell you >> what we do know, so if x is integral >> >> >> if (x && a > 3 && a < 7) >> >> will give you, on the final true edge: >> >> x_5(D) int [-INF, -1][1, +INF] >> a_6(D) int [4, 6] >> >> >> IF x is a float, then we wont give you anything for x obviously, but >> on the eventual true edge we'd still give you >> a_6(D) int [4, 6] > > Which is an acceptable limitation for me. > > However, I can't convince ranger to give me a proper ranges for. I'm > using the following > code snippet: > > outgoing_range query; > > edge e; > edge_iterator ei; > FOR_EACH_EDGE (e, ei, bb->succs) > { > int_range_max range; > if (query.edge_range_p (range, e)) > { > if (dump_file) > { > fprintf (dump_file, "%d->%d: ", e->src->index, e->dest->index); > range.dump(dump_file); > fprintf (dump_file, "\n"); > } > } > } > > > if (9 <= index && index <= 123) > return 123; > > <bb 2> : > index.0_1 = (unsigned int) index_5(D); > _2 = index.0_1 + 4294967287; > if (_2 <= 114) > goto <bb 3>; [INV] > else > goto <bb 4>; [INV] > > I get: > > 2->3: _Bool [1, 1] > 2->4: _Bool [0, 0] > > Can I get to index_5 [9, 123] ? > Thanks, > Martin > Ah, by just using the outgoing_range class, all you are getting is static edges. so a TRUE edge is always a [1,1] and a false edge is [0,0] I provided that class so you could get the constant edges on switches. if you want to get actual ranges for ssa-names, you will need the ranger (which I think is going in today). It uses those values as the starting point for winding back to calculate other dependent names. Then you will want to query the ranger for the range of index_5 on that edge.. so you will need a gimple ranger instance instead of an outgoing_range object. Andrew ^ permalink raw reply [flat|nested] 49+ messages in thread
* Re: [PATCH] Add if-chain to switch conversion pass. 2020-10-06 12:56 ` Andrew MacLeod @ 2020-10-06 13:09 ` Martin Liška 2020-10-06 13:23 ` Andrew MacLeod 2020-10-06 13:41 ` Richard Biener 0 siblings, 2 replies; 49+ messages in thread From: Martin Liška @ 2020-10-06 13:09 UTC (permalink / raw) To: Andrew MacLeod, Richard Biener Cc: David Malcolm, Jakub Jelinek, GCC Patches, Jan Hubicka, Aldy Hernandez On 10/6/20 2:56 PM, Andrew MacLeod wrote: > Ah, by just using the outgoing_range class, all you are getting is static edges. so a TRUE edge is always a [1,1] and a false edge is [0,0] > I provided that class so you could get the constant edges on switches. > > if you want to get actual ranges for ssa-names, you will need the ranger (which I think is going in today). It uses those values as the starting point for winding back to calculate other dependent names. Ah, all right! > > Then you will want to query the ranger for the range of index_5 on that edge.. Fine! So the only tricky thing here is to select a proper SSA_NAME to query right? In my case I need to cover situations like: index.0_1 = (unsigned int) index_5(D); _2 = index.0_1 + 4294967287; if (_2 <= 114) or _1 = aChar_8(D) == 1; _2 = aChar_8(D) == 10; _3 = _1 | _2; if (_3 != 0) Anything Ranger can help me with? Martin > > so you will need a gimple ranger instance instead of an outgoing_range object. > > Andrew ^ permalink raw reply [flat|nested] 49+ messages in thread
* Re: [PATCH] Add if-chain to switch conversion pass. 2020-10-06 13:09 ` Martin Liška @ 2020-10-06 13:23 ` Andrew MacLeod 2020-10-06 13:41 ` Richard Biener 1 sibling, 0 replies; 49+ messages in thread From: Andrew MacLeod @ 2020-10-06 13:23 UTC (permalink / raw) To: Martin Liška, Richard Biener Cc: David Malcolm, Jakub Jelinek, GCC Patches, Jan Hubicka, Aldy Hernandez On 10/6/20 9:09 AM, Martin Liška wrote: > On 10/6/20 2:56 PM, Andrew MacLeod wrote: >> Ah, by just using the outgoing_range class, all you are getting is >> static edges. so a TRUE edge is always a [1,1] and a false edge is [0,0] >> I provided that class so you could get the constant edges on switches. >> >> if you want to get actual ranges for ssa-names, you will need the >> ranger (which I think is going in today). It uses those values as >> the starting point for winding back to calculate other dependent names. > > Ah, all right! > >> >> Then you will want to query the ranger for the range of index_5 on >> that edge.. > > Fine! So the only tricky thing here is to select a proper SSA_NAME to > query right? > In my case I need to cover situations like: > > index.0_1 = (unsigned int) index_5(D); > _2 = index.0_1 + 4294967287; > if (_2 <= 114) > > or > > _1 = aChar_8(D) == 1; > _2 = aChar_8(D) == 10; > _3 = _1 | _2; > if (_3 != 0) > > Anything Ranger can help me with? > > Martin > Well, it *does* assume you know the name of what you are looking for :-P however, lets see. it does know the names of things it can generate ranges for. We havent gotten around to adding an API for querying that. but that would be possible. It maintains an export list of names it can calculate ranges for (as a bitmap). so for your 2 examples, the export list of the first block contains _2, index.0_1, and index_5 and in the second case, it would contain _3, _2, _1, and aChar_8 So even if you had access to the export list, you'd still have to figure out which one you wanted so I'm not sure that helps. But i suppose you could go thru the list looking for something interesting. I have longer term plans to expose/determine the "control names" which trigger the branch, and would be '_2' in the first example and 'aChar_8' in the second... but that facility is not built yet. >> >> so you will need a gimple ranger instance instead of an >> outgoing_range object. >> >> Andrew > ^ permalink raw reply [flat|nested] 49+ messages in thread
* Re: [PATCH] Add if-chain to switch conversion pass. 2020-10-06 13:09 ` Martin Liška 2020-10-06 13:23 ` Andrew MacLeod @ 2020-10-06 13:41 ` Richard Biener 1 sibling, 0 replies; 49+ messages in thread From: Richard Biener @ 2020-10-06 13:41 UTC (permalink / raw) To: Martin Liška Cc: Andrew MacLeod, David Malcolm, Jakub Jelinek, GCC Patches, Jan Hubicka, Aldy Hernandez On Tue, Oct 6, 2020 at 3:09 PM Martin Liška <mliska@suse.cz> wrote: > > On 10/6/20 2:56 PM, Andrew MacLeod wrote: > > Ah, by just using the outgoing_range class, all you are getting is static edges. so a TRUE edge is always a [1,1] and a false edge is [0,0] > > I provided that class so you could get the constant edges on switches. > > > > if you want to get actual ranges for ssa-names, you will need the ranger (which I think is going in today). It uses those values as the starting point for winding back to calculate other dependent names. > > Ah, all right! > > > > > Then you will want to query the ranger for the range of index_5 on that edge.. > > Fine! So the only tricky thing here is to select a proper SSA_NAME to query right? > In my case I need to cover situations like: Note what ranger will get you has the very same limitations as what register_edge_assert_for has - it will _not_ necessarily provide something that, when "concatenated" with &&, reproduces the original condition in full its full semantics. That is, it's not a condition "decomposition" tool either. Richard. > index.0_1 = (unsigned int) index_5(D); > _2 = index.0_1 + 4294967287; > if (_2 <= 114) > > or > > _1 = aChar_8(D) == 1; > _2 = aChar_8(D) == 10; > _3 = _1 | _2; > if (_3 != 0) > > Anything Ranger can help me with? > > Martin > > > > > so you will need a gimple ranger instance instead of an outgoing_range object. > > > > Andrew > ^ permalink raw reply [flat|nested] 49+ messages in thread
* Re: [PATCH] Add if-chain to switch conversion pass. 2020-09-24 12:41 ` Richard Biener 2020-09-25 14:05 ` Martin Liška @ 2020-10-02 13:23 ` Martin Liška 2020-10-06 7:47 ` Richard Biener 1 sibling, 1 reply; 49+ messages in thread From: Martin Liška @ 2020-10-02 13:23 UTC (permalink / raw) To: Richard Biener; +Cc: David Malcolm, Jakub Jelinek, GCC Patches, Jan Hubicka On 9/24/20 2:41 PM, Richard Biener wrote: > On Wed, Sep 2, 2020 at 1:53 PM Martin Liška <mliska@suse.cz> wrote: >> >> On 9/1/20 4:50 PM, David Malcolm wrote: >>> Hope this is constructive >>> Dave >> >> Thank you David. All of them very very useful! >> >> There's updated version of the patch. > > I noticed several functions without a function-level comment. > > - cluster (tree case_label_expr, basic_block case_bb, profile_probability prob, > - profile_probability subtree_prob); > + inline cluster (tree case_label_expr, basic_block case_bb, > + profile_probability prob, profile_probability subtree_prob); > > I thought we generally leave this to the compiler ... Hey. This one is needed, otherwise we'll have a compilation error (multiple definitions). > > +@item -fconvert-if-to-switch > +@opindex fconvert-if-to-switch > +Perform conversion of an if cascade into a switch statement. > +Do so if the switch can be later transformed using a jump table > +or a bit test. The transformation can help to produce faster code for > +the switch statement. This flag is enabled by default > +at @option{-O2} and higher. > > this mentions we do this only when we later can convert the > switch again but both passes (we still have two :/) have > independent guards. All right, I'm planning to come up with -fbit-tests options and this transformation will happen only if BT or JT are enabled. > > + /* For now, just wipe the dominator information. */ > + free_dominance_info (CDI_DOMINATORS); > > could at least be conditional on the vop renaming condition... How do you mean this? > > + if (!all_candidates.is_empty ()) > + mark_virtual_operands_for_renaming (fun); > > + if (bitmap_bit_p (*visited_bbs, bb->index)) > + break; > + bitmap_set_bit (*visited_bbs, bb->index); > > since you are using a bitmap and not a sbitmap (why?) > you can combine those into Yes, sbitmap would be better. > > if (!bitmap_set_bit (*visited_bbs, bb->index)) > break; Unfortunately, bitmap_set_bit for sbitmap is a void return function. Should I change it? > > + /* Current we support following patterns (situations): > + > + 1) if condition with equal operation: > + > ... > > did you see whether using > > register_edge_assert_for (lhs, true_edge, code, lhs, rhs, asserts); > > works equally well? It fills the 'asserts' vector with relations > derived from 'lhs'. There's also > vr_values::extract_range_for_var_from_comparison_expr > to compute the case_range > > + /* If it's not the first condition, then we need a BB without > + any statements. */ > + if (!first) > + { > + unsigned stmt_count = 0; > + for (gimple_stmt_iterator gsi = gsi_start_nondebug_bb (bb); > + !gsi_end_p (gsi); gsi_next_nondebug (&gsi)) > + ++stmt_count; > + > + if (stmt_count - visited_stmt_count != 0) > + break; > > hmm, OK, this might be a bit iffy to get correct then, still it's a lot > of pattern maching code that is there elsewhere already. > ifcombine simply hoists any stmts without side-effects up the > dominator tree and thus only requires BBs without side-effects > (IIRC there's a predicate fn for that). > > + /* Prevent loosing information for a PHI node where 2 edges will > + be folded into one. Note that we must do the same also for false_edge > + (for last BB in a if-elseif chain). */ > + if (!chain->record_phi_arguments (true_edge) > + || !chain->record_phi_arguments (false_edge)) > > I don't really get this - looking at record_phi_arguments it seems > we're requiring that all edges into the same PHI from inside the case > (irrespective of from which case label) have the same value for the > PHI arg? > > + if (arg != *v) > + return false; This one is really needed for situations like: cat wchar.i int i; int pg_utf_mblen() { int len; if (i == 4) len = 3; else if (i == 2) len = 4; else if (i == 6) len = 1; return len; } where we end up just with one edge from switch BB to a destination BB where we have the PHI: # len_4 = PHI <3(2), 4(3), len_6(D)(4), 1(5)> > > should use operand_equal_p at least, REAL_CSTs are for example > not shared tree nodes. I'll also notice that if record_phi_arguments > fails we still may have altered its hash-map even though the particular > edge will not participate in the current chain, so it will affect other > chains ending in the same BB. Overall this looks a bit too conservative > (and random, based on visiting order). No, the m_phi_map is destroyed when we call 'delete chain'. > > + expanded_location loc > + = expand_location (gimple_location (chain->m_first_condition)); > + if (dump_file) > + { > + fprintf (dump_file, "Condition chain (at %s:%d) with %d conditions " > + "(%d BBs) transformed into a switch statement.\n", > + loc.file, loc.line, total_case_values, > + chain->m_entries.length ()); > > Use dump_printf_loc and you can pass a gimple * stmt as location. Good idea. > > + /* Follow if-elseif-elseif chain. */ > + bb = false_edge->dest; > > so that means the code doesn't handle a tree, right? But what > makes us sure the chain doesn't continue on the true_edge instead, > guess this degenerate tree isn't handled either. Well, I was thinking about this one more time. I would like to see a first version that will handle the simple chains that are trivial switch statements: if (x == 1) else if (x ..) ... that was my original motivation and it has quite nice coverage. Later we can support code hoisting and negative expressions like x != 123. Hopefully the upcoming Ranger infrastructure can help us here. Is it acceptable approach for upcoming GCC 11? Martin > > I was thinking on whether doing the switch discovery in a reverse > CFG walk, recording for each BB what case_range(s) it represents > for a particular variable(s) so when visiting a dominator you > can quickly figure what's the relevant children (true, false or both). > It would also make the matching a BB-local operation where you'd > do the case_label discovery based on the single-pred BBs gimple-cond. > > + output = bit_test_cluster::find_bit_tests (filtered_clusters); > + r = output.length () < filtered_clusters.length (); > + if (r) > + dump_clusters (&output, "BT can be built"); > > so as of the very above comment - this might be guarded with > flag_tree_switch_conversion? > > As mentioned previously I would have liked to see if-to-switch > integrated with switch-conversion, having separate passes is > somewhat awkward (for example the redundant and possibly > expensive find_bit_tests). > > + /* Move all statements from the BB to the BB with gswitch. */ > + auto_vec<gimple *> stmts; > + for (gimple_stmt_iterator gsi = gsi_start_bb (entry.m_bb); > + !gsi_end_p (gsi); gsi_next (&gsi)) > + { > + gimple *stmt = gsi_stmt (gsi); > + if (gimple_code (stmt) != GIMPLE_COND) > + stmts.safe_push (stmt); > + } > + > + for (unsigned i = 0; i < stmts.length (); i++) > + { > + gimple_stmt_iterator gsi_from = gsi_for_stmt (stmts[i]); > + gsi_move_before (&gsi_from, &gsi); > + } > > so you are already hoisting all stmts ... > > + make_edge (first_cond.m_bb, case_bb, 0); > > and if this doesn't create a new edge you need equivalent PHI > args in the case_bb. To remove this restriction you "only" > have to add a forwarder. Sth like > > edge e = make_edge (...); > if (!e) > { > bb = create_basic_block (); > make_edge (first_cond.m_bb, bb, 0); > e = make_edge (bb, case_bb, 0); > } > fill PHI arg of 'e' from original value (no need to create the hash-map then) > > Richard. > > >> Martin ^ permalink raw reply [flat|nested] 49+ messages in thread
* Re: [PATCH] Add if-chain to switch conversion pass. 2020-10-02 13:23 ` Martin Liška @ 2020-10-06 7:47 ` Richard Biener 2020-10-06 13:48 ` Martin Liška 0 siblings, 1 reply; 49+ messages in thread From: Richard Biener @ 2020-10-06 7:47 UTC (permalink / raw) To: Martin Liška; +Cc: David Malcolm, Jakub Jelinek, GCC Patches, Jan Hubicka On Fri, Oct 2, 2020 at 3:23 PM Martin Liška <mliska@suse.cz> wrote: > > On 9/24/20 2:41 PM, Richard Biener wrote: > > On Wed, Sep 2, 2020 at 1:53 PM Martin Liška <mliska@suse.cz> wrote: > >> > >> On 9/1/20 4:50 PM, David Malcolm wrote: > >>> Hope this is constructive > >>> Dave > >> > >> Thank you David. All of them very very useful! > >> > >> There's updated version of the patch. > > > > I noticed several functions without a function-level comment. > > > > - cluster (tree case_label_expr, basic_block case_bb, profile_probability prob, > > - profile_probability subtree_prob); > > + inline cluster (tree case_label_expr, basic_block case_bb, > > + profile_probability prob, profile_probability subtree_prob); > > > > I thought we generally leave this to the compiler ... > > Hey. > > This one is needed, otherwise we'll have a compilation error (multiple definitions). > > > > > +@item -fconvert-if-to-switch > > +@opindex fconvert-if-to-switch > > +Perform conversion of an if cascade into a switch statement. > > +Do so if the switch can be later transformed using a jump table > > +or a bit test. The transformation can help to produce faster code for > > +the switch statement. This flag is enabled by default > > +at @option{-O2} and higher. > > > > this mentions we do this only when we later can convert the > > switch again but both passes (we still have two :/) have > > independent guards. > > All right, I'm planning to come up with -fbit-tests options and this transformation > will happen only if BT or JT are enabled. > > > > > + /* For now, just wipe the dominator information. */ > > + free_dominance_info (CDI_DOMINATORS); > > > > could at least be conditional on the vop renaming condition... > > How do you mean this? don't free dominators if you didn't change anything. > > > > + if (!all_candidates.is_empty ()) > > + mark_virtual_operands_for_renaming (fun); > > > > + if (bitmap_bit_p (*visited_bbs, bb->index)) > > + break; > > + bitmap_set_bit (*visited_bbs, bb->index); > > > > since you are using a bitmap and not a sbitmap (why?) > > you can combine those into > > Yes, sbitmap would be better. > > > > > if (!bitmap_set_bit (*visited_bbs, bb->index)) > > break; > > Unfortunately, bitmap_set_bit for sbitmap is a void return function. > Should I change it? No, with sbitmaps you have to keep your current code. > > > > + /* Current we support following patterns (situations): > > + > > + 1) if condition with equal operation: > > + > > ... > > > > did you see whether using > > > > register_edge_assert_for (lhs, true_edge, code, lhs, rhs, asserts); > > > > works equally well? It fills the 'asserts' vector with relations > > derived from 'lhs'. There's also > > vr_values::extract_range_for_var_from_comparison_expr > > to compute the case_range > > > > + /* If it's not the first condition, then we need a BB without > > + any statements. */ > > + if (!first) > > + { > > + unsigned stmt_count = 0; > > + for (gimple_stmt_iterator gsi = gsi_start_nondebug_bb (bb); > > + !gsi_end_p (gsi); gsi_next_nondebug (&gsi)) > > + ++stmt_count; > > + > > + if (stmt_count - visited_stmt_count != 0) > > + break; > > > > hmm, OK, this might be a bit iffy to get correct then, still it's a lot > > of pattern maching code that is there elsewhere already. > > ifcombine simply hoists any stmts without side-effects up the > > dominator tree and thus only requires BBs without side-effects > > (IIRC there's a predicate fn for that). > > > > + /* Prevent loosing information for a PHI node where 2 edges will > > + be folded into one. Note that we must do the same also for false_edge > > + (for last BB in a if-elseif chain). */ > > + if (!chain->record_phi_arguments (true_edge) > > + || !chain->record_phi_arguments (false_edge)) > > > > I don't really get this - looking at record_phi_arguments it seems > > we're requiring that all edges into the same PHI from inside the case > > (irrespective of from which case label) have the same value for the > > PHI arg? > > > > + if (arg != *v) > > + return false; > > This one is really needed for situations like: > > cat wchar.i > int i; > > int > pg_utf_mblen() { > int len; > if (i == 4) > len = 3; > else if (i == 2) > len = 4; > else if (i == 6) > len = 1; > return len; > } > > where we end up just with one edge from switch BB to a destination BB where > we have the PHI: > # len_4 = PHI <3(2), 4(3), len_6(D)(4), 1(5)> Yeah, see my comment on how to deal with this in code generation (introduce a forwarder block). > > > > should use operand_equal_p at least, REAL_CSTs are for example > > not shared tree nodes. I'll also notice that if record_phi_arguments > > fails we still may have altered its hash-map even though the particular > > edge will not participate in the current chain, so it will affect other > > chains ending in the same BB. Overall this looks a bit too conservative > > (and random, based on visiting order). > > No, the m_phi_map is destroyed when we call 'delete chain'. > > > > > + expanded_location loc > > + = expand_location (gimple_location (chain->m_first_condition)); > > + if (dump_file) > > + { > > + fprintf (dump_file, "Condition chain (at %s:%d) with %d conditions " > > + "(%d BBs) transformed into a switch statement.\n", > > + loc.file, loc.line, total_case_values, > > + chain->m_entries.length ()); > > > > Use dump_printf_loc and you can pass a gimple * stmt as location. > > Good idea. > > > > > + /* Follow if-elseif-elseif chain. */ > > + bb = false_edge->dest; > > > > so that means the code doesn't handle a tree, right? But what > > makes us sure the chain doesn't continue on the true_edge instead, > > guess this degenerate tree isn't handled either. > > Well, I was thinking about this one more time. I would like to see > a first version that will handle the simple chains that are trivial > switch statements: > > if (x == 1) > else if (x ..) > ... > > that was my original motivation and it has quite nice coverage. > Later we can support code hoisting and negative expressions > like x != 123. Hopefully the upcoming Ranger infrastructure can help > us here. Is it acceptable approach for upcoming GCC 11? But is it really extensible with the current implementation? I doubt so. Richard. > Martin > > > > > I was thinking on whether doing the switch discovery in a reverse > > CFG walk, recording for each BB what case_range(s) it represents > > for a particular variable(s) so when visiting a dominator you > > can quickly figure what's the relevant children (true, false or both). > > It would also make the matching a BB-local operation where you'd > > do the case_label discovery based on the single-pred BBs gimple-cond. > > > > + output = bit_test_cluster::find_bit_tests (filtered_clusters); > > + r = output.length () < filtered_clusters.length (); > > + if (r) > > + dump_clusters (&output, "BT can be built"); > > > > so as of the very above comment - this might be guarded with > > flag_tree_switch_conversion? > > > > As mentioned previously I would have liked to see if-to-switch > > integrated with switch-conversion, having separate passes is > > somewhat awkward (for example the redundant and possibly > > expensive find_bit_tests). > > > > + /* Move all statements from the BB to the BB with gswitch. */ > > + auto_vec<gimple *> stmts; > > + for (gimple_stmt_iterator gsi = gsi_start_bb (entry.m_bb); > > + !gsi_end_p (gsi); gsi_next (&gsi)) > > + { > > + gimple *stmt = gsi_stmt (gsi); > > + if (gimple_code (stmt) != GIMPLE_COND) > > + stmts.safe_push (stmt); > > + } > > + > > + for (unsigned i = 0; i < stmts.length (); i++) > > + { > > + gimple_stmt_iterator gsi_from = gsi_for_stmt (stmts[i]); > > + gsi_move_before (&gsi_from, &gsi); > > + } > > > > so you are already hoisting all stmts ... > > > > + make_edge (first_cond.m_bb, case_bb, 0); > > > > and if this doesn't create a new edge you need equivalent PHI > > args in the case_bb. To remove this restriction you "only" > > have to add a forwarder. Sth like > > > > edge e = make_edge (...); > > if (!e) > > { > > bb = create_basic_block (); > > make_edge (first_cond.m_bb, bb, 0); > > e = make_edge (bb, case_bb, 0); > > } > > fill PHI arg of 'e' from original value (no need to create the hash-map then) > > > > Richard. > > > > > >> Martin > ^ permalink raw reply [flat|nested] 49+ messages in thread
* Re: [PATCH] Add if-chain to switch conversion pass. 2020-10-06 7:47 ` Richard Biener @ 2020-10-06 13:48 ` Martin Liška 2020-10-06 14:12 ` Jakub Jelinek 2020-10-07 8:00 ` Richard Biener 0 siblings, 2 replies; 49+ messages in thread From: Martin Liška @ 2020-10-06 13:48 UTC (permalink / raw) To: Richard Biener; +Cc: David Malcolm, Jakub Jelinek, GCC Patches, Jan Hubicka On 10/6/20 9:47 AM, Richard Biener wrote: > But is it really extensible with the current implementation? I doubt so. I must agree with the statement. So let's make the pass properly. I would need a help with the algorithm where I'm planning to do the following steps: 1) for each BB ending with a gcond, parse index variable and it's VR; I'll support: a) index == 123 ([123, 123]) b) 1 <= index && index <= 9 ([1, 9]) c) index == 123 || index == 12345 ([123, 123] [12345, 12345]) d) index != 1 ([1, 1]) e) index != 1 && index != 5 ([1, 1] [5, 5]) 2) switch range edge is identified, e.g. true_edge for 1e, while false_edge for 1a 3) I want to support forward code hoisting, so for each condition BB we need to identify if the block contains only stmts without a side-effect 4) we can ignore BBs with condition variables that has small number of potential case switches 5) for each condition variable we can iterate bottom up in dominator order and try to find a BB predecessor chain (in first phase no BB in between such "condition" BBs) that uses a same condition variable 6) the chain will be converted to a switch statement 7) code hoisting must be done in order to move a gimple statements and fix potential gphis that can be collapsed Is it something feasible that can work? Thanks, Martin ^ permalink raw reply [flat|nested] 49+ messages in thread
* Re: [PATCH] Add if-chain to switch conversion pass. 2020-10-06 13:48 ` Martin Liška @ 2020-10-06 14:12 ` Jakub Jelinek 2020-10-12 12:39 ` Martin Liška 2020-10-07 8:00 ` Richard Biener 1 sibling, 1 reply; 49+ messages in thread From: Jakub Jelinek @ 2020-10-06 14:12 UTC (permalink / raw) To: Martin Liška; +Cc: Richard Biener, GCC Patches, Jan Hubicka On Tue, Oct 06, 2020 at 03:48:38PM +0200, Martin Liška wrote: > On 10/6/20 9:47 AM, Richard Biener wrote: > > But is it really extensible with the current implementation? I doubt so. > > I must agree with the statement. So let's make the pass properly. > I would need a help with the algorithm where I'm planning to do the following > steps: > > 1) for each BB ending with a gcond, parse index variable and it's VR; > I'll support: > a) index == 123 ([123, 123]) > b) 1 <= index && index <= 9 ([1, 9]) > c) index == 123 || index == 12345 ([123, 123] [12345, 12345]) > d) index != 1 ([1, 1]) > e) index != 1 && index != 5 ([1, 1] [5, 5]) The fold_range_test created cases are essential to support, so f) index - 123U < 456U ([123, 456+123]) g) (unsigned) index - 123U < 456U (ditto) but the discovery should actually recurse on all of those forms, so it will handle (unsigned) index - 123U < 456U || (unsigned) index - 16384U <= 32711U etc. You can see what reassoc init_range_entry does and do something similar? Jakub ^ permalink raw reply [flat|nested] 49+ messages in thread
* Re: [PATCH] Add if-chain to switch conversion pass. 2020-10-06 14:12 ` Jakub Jelinek @ 2020-10-12 12:39 ` Martin Liška 2020-10-12 13:00 ` Jakub Jelinek 2020-10-14 18:09 ` Andrew MacLeod 0 siblings, 2 replies; 49+ messages in thread From: Martin Liška @ 2020-10-12 12:39 UTC (permalink / raw) To: Jakub Jelinek; +Cc: Richard Biener, GCC Patches, Jan Hubicka On 10/6/20 4:12 PM, Jakub Jelinek wrote: > On Tue, Oct 06, 2020 at 03:48:38PM +0200, Martin Liška wrote: >> On 10/6/20 9:47 AM, Richard Biener wrote: >>> But is it really extensible with the current implementation? I doubt so. >> >> I must agree with the statement. So let's make the pass properly. >> I would need a help with the algorithm where I'm planning to do the following >> steps: >> >> 1) for each BB ending with a gcond, parse index variable and it's VR; >> I'll support: >> a) index == 123 ([123, 123]) >> b) 1 <= index && index <= 9 ([1, 9]) >> c) index == 123 || index == 12345 ([123, 123] [12345, 12345]) >> d) index != 1 ([1, 1]) >> e) index != 1 && index != 5 ([1, 1] [5, 5]) > > The fold_range_test created cases are essential to support, so > f) index - 123U < 456U ([123, 456+123]) > g) (unsigned) index - 123U < 456U (ditto) > but the discovery should actually recurse on all of those forms, so it will > handle > (unsigned) index - 123U < 456U || (unsigned) index - 16384U <= 32711U > etc. > You can see what reassoc init_range_entry does and do something similar? All right, I started to use init_range_entry in combination with linearize_expr_tree. One thing I have problem with is that linearize_expr_tree doesn't properly mark all statements as visited for cases like: <bb 4> : index2.1_1 = (unsigned int) index2_16(D); _2 = index2.1_1 + 4294967196; _3 = _2 <= 100; _5 = index2.1_1 + 4294966996; _6 = _5 <= 33; _7 = _3 | _6; if (_7 != 0) goto <bb 5>; [INV] else goto <bb 6>; [INV] As seen, all statements in this BB are used by the final _7 != 0 and it would be handy for me to identify all statements that should be hoisted. Thoughts how can I achieve that? Thanks, Martin ^ permalink raw reply [flat|nested] 49+ messages in thread
* Re: [PATCH] Add if-chain to switch conversion pass. 2020-10-12 12:39 ` Martin Liška @ 2020-10-12 13:00 ` Jakub Jelinek 2020-10-14 18:09 ` Andrew MacLeod 1 sibling, 0 replies; 49+ messages in thread From: Jakub Jelinek @ 2020-10-12 13:00 UTC (permalink / raw) To: Martin Liška; +Cc: Richard Biener, GCC Patches, Jan Hubicka On Mon, Oct 12, 2020 at 02:39:24PM +0200, Martin Liška wrote: > All right, I started to use init_range_entry in combination with linearize_expr_tree. > One thing I have problem with is that linearize_expr_tree doesn't properly mark > all statements as visited for cases like: Not sure if linearize_expr_tree is what you want, then you run into many reassoc dependencies (e.g. having computed uids and all that). My suggestion was to just copy and tweak init_range_entry (and reuse the fold_const range step stuff). There is no need to linearize anything, for what you want it doesn't matter if you process (x | y) | (z | w) where all of x, y, z, w are some comparisons, or x | (y | (z | w)) etc. All you want to ensure is that all the logical operations feeding each GIMPLE_COND are the same (all |s or all &s), and that they make sense also for the basic blocks, then for each of the subconditions find the ranges and verify that they all use the same index. And then I think you shouldn't hoist anything either, rather check that all the blocks but the first one are no_side_effect_bb (perhaps export that one from reassoc), thus when you turn that into a switch starting at the end of first bb, you can just throw away all the non-side-effects basic blocks. Or do you want instead allow other stmts in those bbs and check that either it is consumed all in the same bb, or it is consumed in the bbs dominated by the bb that the case label for the particular case would be added for, and sink the statements to that bb? > > <bb 4> : > index2.1_1 = (unsigned int) index2_16(D); > _2 = index2.1_1 + 4294967196; > _3 = _2 <= 100; > _5 = index2.1_1 + 4294966996; > _6 = _5 <= 33; > _7 = _3 | _6; > if (_7 != 0) > goto <bb 5>; [INV] > else > goto <bb 6>; [INV] > > As seen, all statements in this BB are used by the final _7 != 0 and it would > be handy for me to identify all statements that should be hoisted. > > Thoughts how can I achieve that? Jakub ^ permalink raw reply [flat|nested] 49+ messages in thread
* Re: [PATCH] Add if-chain to switch conversion pass. 2020-10-12 12:39 ` Martin Liška 2020-10-12 13:00 ` Jakub Jelinek @ 2020-10-14 18:09 ` Andrew MacLeod 1 sibling, 0 replies; 49+ messages in thread From: Andrew MacLeod @ 2020-10-14 18:09 UTC (permalink / raw) To: Martin Liška, Jakub Jelinek; +Cc: GCC Patches, Jan Hubicka, Aldy Hernandez On 10/12/20 8:39 AM, Martin Liška wrote: > On 10/6/20 4:12 PM, Jakub Jelinek wrote: >> On Tue, Oct 06, 2020 at 03:48:38PM +0200, Martin Liška wrote: >>> On 10/6/20 9:47 AM, Richard Biener wrote: >>>> But is it really extensible with the current implementation? I >>>> doubt so. >>> >>> I must agree with the statement. So let's make the pass properly. >>> I would need a help with the algorithm where I'm planning to do the >>> following >>> steps: >>> >>> 1) for each BB ending with a gcond, parse index variable and it's VR; >>> I'll support: >>> a) index == 123 ([123, 123]) >>> b) 1 <= index && index <= 9 ([1, 9]) >>> c) index == 123 || index == 12345 ([123, 123] [12345, 12345]) >>> d) index != 1 ([1, 1]) >>> e) index != 1 && index != 5 ([1, 1] [5, 5]) >> >> The fold_range_test created cases are essential to support, so >> f) index - 123U < 456U ([123, 456+123]) >> g) (unsigned) index - 123U < 456U (ditto) >> but the discovery should actually recurse on all of those forms, so >> it will >> handle >> (unsigned) index - 123U < 456U || (unsigned) index - 16384U <= 32711U >> etc. >> You can see what reassoc init_range_entry does and do something similar? > > All right, I started to use init_range_entry in combination with > linearize_expr_tree. > One thing I have problem with is that linearize_expr_tree doesn't > properly mark > all statements as visited for cases like: > > <bb 4> : > index2.1_1 = (unsigned int) index2_16(D); > _2 = index2.1_1 + 4294967196; > _3 = _2 <= 100; > _5 = index2.1_1 + 4294966996; > _6 = _5 <= 33; > _7 = _3 | _6; > if (_7 != 0) > goto <bb 5>; [INV] > else > goto <bb 6>; [INV] > > As seen, all statements in this BB are used by the final _7 != 0 and > it would > be handy for me to identify all statements that should be hoisted. The ranger infrastructure includes definition chains for what can potentially have a range calculated on an outgoing edge. It contains all the ssa-names defined in the block for which we have range-ops entries that allow us to potentially wind back thru a calculation. ie, any name which is defined in the block whose value can be changed based on which edge is taken... I created: foo (int index) { if (index - 123U < 456U || index - 16384U <= 32711U ) foo (42); } the exports range list contains =========== BB 2 ============ index_9(D) int VARYING <bb 2> : index.0_1 = (unsigned int) index_9(D); _2 = index.0_1 + 4294967173; _3 = _2 <= 455; _5 = index.0_1 + 4294950912; _6 = _5 <= 32711; _7 = _3 | _6; if (_7 != 0) goto <bb 3>; [INV] else goto <bb 4>; [INV] 2->3 (T) index.0_1 : unsigned int [123, 578][16384, 49095] 2->3 (T) _7 : _Bool [1, 1] 2->3 (T) index_9(D) : int [123, 578][16384, 49095] 2->4 (F) index.0_1 : unsigned int [0, 122][579, 16383][49096, +INF] 2->4 (F) _2 : unsigned int [456, +INF] 2->4 (F) _3 : _Bool [0, 0] 2->4 (F) _5 : unsigned int [32712, +INF] 2->4 (F) _6 : _Bool [0, 0] 2->4 (F) _7 : _Bool [0, 0] 2->4 (F) index_9(D) : int [-INF, 122][579, 16383][49096, +INF] and importantly, the defchain structure which lists names which are used to define this name looks like: DUMPING GORI MAP bb2 index.0_1 : index_9(D) _2 : index.0_1 index_9(D) _3 : index.0_1 _2 index_9(D) _5 : index.0_1 index_9(D) _6 : index.0_1 _5 index_9(D) _7 : index.0_1 _2 _3 _5 _6 index_9(D) exports: index.0_1 _2 _3 _5 _6 _7 index_9(D) This indicates that if you are using _7 as the control name of the branch, _7 : index.0_1 _2 _3 _5 _6 index_9(D) is the list of names that _7 uses in its definition chain...and we can calculate ranges for. index_9 is not defined in this BB, so it is considered an import. you'd probably be looking for all the names in this list whose SSA_NAME_DEF_STMT is in this block.. That looks a lot like the list of statements you want to hoist. Caveats are that 1) this is currently only used internally by the ranger, so there are some minor warts that may currently limit its usefulness elsewhere 2) its is limited to only processing statements for which we have range-ops understanding. which means we know how to calculate ranges for the statement. Perhaps this is also not an issue since if there are statements we cant generate a range for, perhaps you dont care. This might be more ionfo than you need, but also 3) before the enxt stage 1 I plan to rework the GORI component, and I plan to split this into additional "parts" in particualr, this entire export list will still exist, but there will be 3 subcomponents which form it: a) control names : These are booleans which contribute to the TRUE/FALSEness of the edge b) direct exports : These are ssanames which are directly affected by relations on the edge.. Ie, the edge gives them a range c) calculable exports : These are other ssa_names which can be calculated based on the direct exports. Ie, the direct export is used in calculating this value for the above block, control names : _7, _6 and _3 direct exports : _5 and _2 calculable exports : index.0_1 index_9(D) I bring it up because as IM reworking those bits, we can take into account other requirements that might be needed that can make it useful other places. And by anaylzing the names that are common between any direct exports, you may find useful information. Currently, the exports list is not exported from the ranger, nor is the gori map, but that would be trivial to do. You basically get a bitmap back.. The classes are not dependant on the ranger either, so you can roll your own if you wanted to experiment. Since they are internal they are currently located in gimple-range-gori.cc.. its basically the gori_map class which tracks all this and uses the range_def_chain class to manage the definition chains. I threw a number fo comments in there already. Its lazily evaluated as queries are made. If you think there is something useful, we can move those classes into the gimple-range-gori.h header file and adjust the APIs as needed. > > Thoughts how can I achieve that? > Thanks, > Martin > ^ permalink raw reply [flat|nested] 49+ messages in thread
* Re: [PATCH] Add if-chain to switch conversion pass. 2020-10-06 13:48 ` Martin Liška 2020-10-06 14:12 ` Jakub Jelinek @ 2020-10-07 8:00 ` Richard Biener 2020-10-12 12:44 ` Martin Liška 1 sibling, 1 reply; 49+ messages in thread From: Richard Biener @ 2020-10-07 8:00 UTC (permalink / raw) To: Martin Liška; +Cc: David Malcolm, Jakub Jelinek, GCC Patches, Jan Hubicka On Tue, Oct 6, 2020 at 4:03 PM Martin Liška <mliska@suse.cz> wrote: > > On 10/6/20 9:47 AM, Richard Biener wrote: > > But is it really extensible with the current implementation? I doubt so. > > I must agree with the statement. So let's make the pass properly. > I would need a help with the algorithm where I'm planning to do the following > steps: > > 1) for each BB ending with a gcond, parse index variable and it's VR; > I'll support: > a) index == 123 ([123, 123]) > b) 1 <= index && index <= 9 ([1, 9]) > c) index == 123 || index == 12345 ([123, 123] [12345, 12345]) > d) index != 1 ([1, 1]) > e) index != 1 && index != 5 ([1, 1] [5, 5]) > > 2) switch range edge is identified, e.g. true_edge for 1e, while false_edge for 1a > > 3) I want to support forward code hoisting, so for each condition BB we need to identify > if the block contains only stmts without a side-effect > > 4) we can ignore BBs with condition variables that has small number of potential > case switches > > 5) for each condition variable we can iterate bottom up in dominator order and try > to find a BB predecessor chain (in first phase no BB in between such "condition" BBs) > that uses a same condition variable > > 6) the chain will be converted to a switch statement > 7) code hoisting must be done in order to move a gimple statements and fix potential > gphis that can be collapsed > > Is it something feasible that can work? As said I'd have a BB-local pass over BBs recording the index variable and the range covered by the BBs gcond, plus recording how many excess stmts there are for eventual code motion. Only after that BB-local pass start to group BBs in a walk from dominated to dominating BBs looking for common indexes and building a case vector. The main thing is to avoid repeatedly analyzing BBs conditions (so the first pass could be also a on-demand precompute thing) and making the case vector build optimal. > Thanks, > > Martin > ^ permalink raw reply [flat|nested] 49+ messages in thread
* Re: [PATCH] Add if-chain to switch conversion pass. 2020-10-07 8:00 ` Richard Biener @ 2020-10-12 12:44 ` Martin Liška 2020-10-12 13:01 ` Martin Liška 2020-10-16 14:04 ` [PATCH v2] " Martin Liška 0 siblings, 2 replies; 49+ messages in thread From: Martin Liška @ 2020-10-12 12:44 UTC (permalink / raw) To: Richard Biener; +Cc: David Malcolm, Jakub Jelinek, GCC Patches, Jan Hubicka On 10/7/20 10:00 AM, Richard Biener wrote: > As said I'd have a BB-local pass over BBs recording the index variable > and the range covered by the BBs gcond, plus recording how many excess > stmts there are for eventual code motion. > > Only after that BB-local pass start to group BBs in a walk from dominated to > dominating BBs looking for common indexes and building a case vector. > > The main thing is to avoid repeatedly analyzing BBs conditions (so the first > pass could be also a on-demand precompute thing) and making the > case vector build optimal. I have a patch that does that using the infrastructure from tree-ssa-reassoc. Now I would like to implement the code hoisting. Am I right that we want something like: if (index == C0) goto BB_0; else { BB1_to_hoist_stmts; if (index == C1) goto BB_1; else { BB2_to_hoist_stmts; if (index == C2) goto BB_2; else goto default_BB; } } be converted into: switch(index) { case C0: goto BB_0; case C1: BB1_to_hoist_stmts; goto BB_1; case C2: BB1_to_hoist_stmts; BB2_to_hoist_stmts; goto BB_2; else: BB1_to_hoist_stmts; BB2_to_hoist_stmts; goto default_BB; } ? Thanks, Martin ^ permalink raw reply [flat|nested] 49+ messages in thread
* Re: [PATCH] Add if-chain to switch conversion pass. 2020-10-12 12:44 ` Martin Liška @ 2020-10-12 13:01 ` Martin Liška 2020-10-15 12:38 ` Richard Biener 2020-10-16 14:04 ` [PATCH v2] " Martin Liška 1 sibling, 1 reply; 49+ messages in thread From: Martin Liška @ 2020-10-12 13:01 UTC (permalink / raw) To: Richard Biener; +Cc: Jakub Jelinek, GCC Patches, Jan Hubicka On 10/12/20 2:44 PM, Martin Liška wrote: > On 10/7/20 10:00 AM, Richard Biener wrote: >> As said I'd have a BB-local pass over BBs recording the index variable >> and the range covered by the BBs gcond, plus recording how many excess >> stmts there are for eventual code motion. >> >> Only after that BB-local pass start to group BBs in a walk from dominated to >> dominating BBs looking for common indexes and building a case vector. >> >> The main thing is to avoid repeatedly analyzing BBs conditions (so the first >> pass could be also a on-demand precompute thing) and making the >> case vector build optimal. > > I have a patch that does that using the infrastructure from tree-ssa-reassoc. > Now I would like to implement the code hoisting. Am I right that we want > something like: > > if (index == C0) > goto BB_0; > else > { > BB1_to_hoist_stmts; > if (index == C1) > goto BB_1; > else > { > BB2_to_hoist_stmts; > if (index == C2) > goto BB_2; > else > goto default_BB; > } > } > > be converted into: > > switch(index) > { > case C0: > goto BB_0; > case C1: > BB1_to_hoist_stmts; > goto BB_1; > case C2: > BB1_to_hoist_stmts; > BB2_to_hoist_stmts; > goto BB_2; > else: > BB1_to_hoist_stmts; > BB2_to_hoist_stmts; > goto default_BB; > } > > ? Reading again Richi's comment: > ifcombine simply hoists any stmts without side-effects up the > dominator tree and thus only requires BBs without side-effects > (IIRC there's a predicate fn for that). we likely want to hoist the statements "up" to the gswitch BB? Martin > > Thanks, > Martin ^ permalink raw reply [flat|nested] 49+ messages in thread
* Re: [PATCH] Add if-chain to switch conversion pass. 2020-10-12 13:01 ` Martin Liška @ 2020-10-15 12:38 ` Richard Biener 0 siblings, 0 replies; 49+ messages in thread From: Richard Biener @ 2020-10-15 12:38 UTC (permalink / raw) To: Martin Liška; +Cc: Jakub Jelinek, GCC Patches, Jan Hubicka On Mon, Oct 12, 2020 at 3:02 PM Martin Liška <mliska@suse.cz> wrote: > > On 10/12/20 2:44 PM, Martin Liška wrote: > > On 10/7/20 10:00 AM, Richard Biener wrote: > >> As said I'd have a BB-local pass over BBs recording the index variable > >> and the range covered by the BBs gcond, plus recording how many excess > >> stmts there are for eventual code motion. > >> > >> Only after that BB-local pass start to group BBs in a walk from dominated to > >> dominating BBs looking for common indexes and building a case vector. > >> > >> The main thing is to avoid repeatedly analyzing BBs conditions (so the first > >> pass could be also a on-demand precompute thing) and making the > >> case vector build optimal. > > > > I have a patch that does that using the infrastructure from tree-ssa-reassoc. > > Now I would like to implement the code hoisting. Am I right that we want > > something like: > > > > if (index == C0) > > goto BB_0; > > else > > { > > BB1_to_hoist_stmts; > > if (index == C1) > > goto BB_1; > > else > > { > > BB2_to_hoist_stmts; > > if (index == C2) > > goto BB_2; > > else > > goto default_BB; > > } > > } > > > > be converted into: > > > > switch(index) > > { > > case C0: > > goto BB_0; > > case C1: > > BB1_to_hoist_stmts; > > goto BB_1; > > case C2: > > BB1_to_hoist_stmts; > > BB2_to_hoist_stmts; > > goto BB_2; > > else: > > BB1_to_hoist_stmts; > > BB2_to_hoist_stmts; > > goto default_BB; > > } > > > > ? > > Reading again Richi's comment: > > > ifcombine simply hoists any stmts without side-effects up the > > dominator tree and thus only requires BBs without side-effects > > (IIRC there's a predicate fn for that). > > we likely want to hoist the statements "up" to the gswitch BB? Yes. code sinking later will sink what can be sunk. > Martin > > > > > Thanks, > > Martin > ^ permalink raw reply [flat|nested] 49+ messages in thread
* [PATCH v2] Add if-chain to switch conversion pass. 2020-10-12 12:44 ` Martin Liška 2020-10-12 13:01 ` Martin Liška @ 2020-10-16 14:04 ` Martin Liška 2020-11-06 12:31 ` Richard Biener 1 sibling, 1 reply; 49+ messages in thread From: Martin Liška @ 2020-10-16 14:04 UTC (permalink / raw) To: Richard Biener; +Cc: David Malcolm, Jakub Jelinek, GCC Patches, Jan Hubicka [-- Attachment #1: Type: text/plain, Size: 657 bytes --] Hello. There's another version of the patch that should be based on what I discussed with Richi and Jakub: - the first patch introduces a new option -fbit-tests that analogue to -fjump-tables and will control the new if-to-switch conversion pass - the second patch adds the pass - I share code with tree-ssa-reassoc.c (range_entry and init_range_entry) - a local discovery phase is run first - later than these local BBs are chained into a candidate list for the conversion I'm also sending transformed chains for 'make all-host' (620 transformations). Patch can bootstrap on x86_64-linux-gnu and survives regression tests. Thoughts? Thanks, Martin [-- Attachment #2: 0002-Add-if-chain-to-switch-conversion-pass.patch --] [-- Type: text/x-patch, Size: 36611 bytes --] From 69b043dfe5a741ca5b0d9536a0b59b1d5066d47f Mon Sep 17 00:00:00 2001 From: Martin Liska <mliska@suse.cz> Date: Fri, 28 Aug 2020 10:26:13 +0200 Subject: [PATCH 2/2] Add if-chain to switch conversion pass. gcc/ChangeLog: PR tree-optimization/14799 PR ipa/88702 * Makefile.in: Add gimple-if-to-switch.o. * dbgcnt.def (DEBUG_COUNTER): Add new debug counter. * passes.def: Include new pass_if_to_switch pass. * timevar.def (TV_TREE_IF_TO_SWITCH): New timevar. * tree-pass.h (make_pass_if_to_switch): New. * tree-ssa-reassoc.c (struct operand_entry): Move to the header. (dump_range_entry): Move to header file. (debug_range_entry): Likewise. (no_side_effect_bb): Make it global. * tree-switch-conversion.h (simple_cluster::simple_cluster): Add inline for couple of functions in order to prevent error about multiple defined symbols. * gimple-if-to-switch.cc: New file. * tree-ssa-reassoc.h: New file. gcc/testsuite/ChangeLog: PR tree-optimization/14799 PR ipa/88702 * gcc.dg/tree-ssa/pr96480.c: Disable if-to-switch conversion. * gcc.dg/tree-ssa/reassoc-32.c: Likewise. * g++.dg/tree-ssa/if-to-switch-1.C: New test. * gcc.dg/tree-ssa/if-to-switch-1.c: New test. * gcc.dg/tree-ssa/if-to-switch-2.c: New test. * gcc.dg/tree-ssa/if-to-switch-3.c: New test. * gcc.dg/tree-ssa/if-to-switch-4.c: New test. * gcc.dg/tree-ssa/if-to-switch-5.c: New test. * gcc.dg/tree-ssa/if-to-switch-6.c: New test. * gcc.dg/tree-ssa/if-to-switch-7.c: New test. * gcc.dg/tree-ssa/if-to-switch-8.c: New test. --- gcc/Makefile.in | 1 + gcc/dbgcnt.def | 1 + gcc/gimple-if-to-switch.cc | 565 ++++++++++++++++++ gcc/passes.def | 1 + .../g++.dg/tree-ssa/if-to-switch-1.C | 25 + .../gcc.dg/tree-ssa/if-to-switch-1.c | 35 ++ .../gcc.dg/tree-ssa/if-to-switch-2.c | 11 + .../gcc.dg/tree-ssa/if-to-switch-3.c | 11 + .../gcc.dg/tree-ssa/if-to-switch-4.c | 36 ++ .../gcc.dg/tree-ssa/if-to-switch-5.c | 12 + .../gcc.dg/tree-ssa/if-to-switch-6.c | 42 ++ .../gcc.dg/tree-ssa/if-to-switch-7.c | 25 + .../gcc.dg/tree-ssa/if-to-switch-8.c | 27 + gcc/testsuite/gcc.dg/tree-ssa/pr96480.c | 2 +- gcc/testsuite/gcc.dg/tree-ssa/reassoc-32.c | 2 +- gcc/timevar.def | 1 + gcc/tree-pass.h | 1 + gcc/tree-ssa-reassoc.c | 27 +- gcc/tree-ssa-reassoc.h | 48 ++ gcc/tree-switch-conversion.h | 24 +- 20 files changed, 865 insertions(+), 32 deletions(-) create mode 100644 gcc/gimple-if-to-switch.cc create mode 100644 gcc/testsuite/g++.dg/tree-ssa/if-to-switch-1.C create mode 100644 gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-1.c create mode 100644 gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-2.c create mode 100644 gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-3.c create mode 100644 gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-4.c create mode 100644 gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-5.c create mode 100644 gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-6.c create mode 100644 gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-7.c create mode 100644 gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-8.c create mode 100644 gcc/tree-ssa-reassoc.h diff --git a/gcc/Makefile.in b/gcc/Makefile.in index 5a8fb0d7612..c7ecda54df2 100644 --- a/gcc/Makefile.in +++ b/gcc/Makefile.in @@ -1361,6 +1361,7 @@ OBJS = \ gimple-array-bounds.o \ gimple-builder.o \ gimple-expr.o \ + gimple-if-to-switch.o \ gimple-iterator.o \ gimple-fold.o \ gimple-laddress.o \ diff --git a/gcc/dbgcnt.def b/gcc/dbgcnt.def index 07946a85ecc..c8d41065a94 100644 --- a/gcc/dbgcnt.def +++ b/gcc/dbgcnt.def @@ -170,6 +170,7 @@ DEBUG_COUNTER (if_after_combine) DEBUG_COUNTER (if_after_reload) DEBUG_COUNTER (if_conversion) DEBUG_COUNTER (if_conversion_tree) +DEBUG_COUNTER (if_to_switch) DEBUG_COUNTER (ipa_cp_bits) DEBUG_COUNTER (ipa_mod_ref) DEBUG_COUNTER (ipa_sra_params) diff --git a/gcc/gimple-if-to-switch.cc b/gcc/gimple-if-to-switch.cc new file mode 100644 index 00000000000..25ef45175a7 --- /dev/null +++ b/gcc/gimple-if-to-switch.cc @@ -0,0 +1,565 @@ +/* If-elseif-else to switch conversion pass + Copyright (C) 2020 Free Software Foundation, Inc. + +This file is part of GCC. + +GCC is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 3, or (at your option) +any later version. + +GCC is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GCC; see the file COPYING3. If not see +<http://www.gnu.org/licenses/>. */ + +/* Algorithm of the pass runs in the following steps: + a) We walk basic blocks in DOMINATOR order so that we first reach + a first condition of a future switch. + b) We follow false edges of a if-else-chain and we record chain + of GIMPLE conditions. These blocks are only used for comparison + of a common SSA_NAME and we do not allow any side effect. + c) We remove all basic blocks (except first) of such chain and + GIMPLE switch replaces the condition in the first basic block. + d) We move all GIMPLE statements in the removed blocks into the + first one. */ + +#include "config.h" +#include "system.h" +#include "coretypes.h" +#include "backend.h" +#include "rtl.h" +#include "tree.h" +#include "gimple.h" +#include "tree-pass.h" +#include "ssa.h" +#include "gimple-pretty-print.h" +#include "fold-const.h" +#include "gimple-iterator.h" +#include "tree-cfg.h" +#include "tree-dfa.h" +#include "tree-cfgcleanup.h" +#include "alias.h" +#include "tree-ssa-loop.h" +#include "diagnostic.h" +#include "cfghooks.h" +#include "tree-into-ssa.h" +#include "cfganal.h" +#include "dbgcnt.h" +#include "target.h" +#include "alloc-pool.h" +#include "tree-switch-conversion.h" +#include "tree-ssa-reassoc.h" + +using namespace tree_switch_conversion; + +struct condition_info +{ + typedef vec<std::pair<gphi *, tree>> mapping_vec; + + condition_info (gcond *cond): m_cond (cond), m_bb (gimple_bb (cond)), + m_forwarder_bb (NULL), m_ranges (), m_true_edge (NULL), m_false_edge (NULL), + m_true_edge_phi_mapping (), m_false_edge_phi_mapping () + { + m_ranges.create (0); + } + + /* Recond PHI mapping for an original edge E and save these into + vector VEC. */ + void record_phi_mapping (edge e, mapping_vec *vec); + + gcond *m_cond; + basic_block m_bb; + basic_block m_forwarder_bb; + vec<range_entry> m_ranges; + edge m_true_edge; + edge m_false_edge; + mapping_vec m_true_edge_phi_mapping; + mapping_vec m_false_edge_phi_mapping; +}; + +/* Recond PHI mapping for an original edge E and save these into vector VEC. */ + +void +condition_info::record_phi_mapping (edge e, mapping_vec *vec) +{ + for (gphi_iterator gsi = gsi_start_phis (e->dest); !gsi_end_p (gsi); + gsi_next (&gsi)) + { + gphi *phi = gsi.phi (); + if (!virtual_operand_p (gimple_phi_result (phi))) + { + tree arg = PHI_ARG_DEF_FROM_EDGE (phi, e); + vec->safe_push (std::make_pair (phi, arg)); + } + } +} + +/* Master structure for one if to switch conversion candidate. */ + +struct if_chain +{ + /* Default constructor. */ + if_chain (): m_entries () + { + m_entries.create (2); + } + + /* Default destructor. */ + ~if_chain () + { + m_entries.release (); + } + + /* Verify that all case ranges do not overlap. */ + bool check_non_overlapping_cases (); + + /* Return true when the switch can be expanded with a jump table or + a bit test (at least partially). */ + bool is_beneficial (); + + /* If chain entries. */ + vec<condition_info *> m_entries; +}; + +/* Compare two case ranges by minimum value. */ + +static int +range_cmp (const void *a, const void *b) +{ + const range_entry *re1 = *(const range_entry * const *) a; + const range_entry *re2 = *(const range_entry * const *) b; + + return tree_int_cst_compare (re1->low, re2->low); +} + +/* Verify that all case ranges do not overlap. */ + +bool +if_chain::check_non_overlapping_cases () +{ + auto_vec<range_entry *> all_ranges; + for (unsigned i = 0; i < m_entries.length (); i++) + for (unsigned j = 0; j < m_entries[i]->m_ranges.length (); j++) + all_ranges.safe_push (&m_entries[i]->m_ranges[j]); + + all_ranges.qsort (range_cmp); + + for (unsigned i = 0; i < all_ranges.length () - 1; i++) + { + range_entry *left = all_ranges[i]; + range_entry *right = all_ranges[i + 1]; + if (tree_int_cst_le (left->low, right->low) + && tree_int_cst_le (right->low, left->high)) + return false; + } + + return true; +} + +/* Compare clusters by minimum value. */ + +static int +cluster_cmp (const void *a, const void *b) +{ + simple_cluster *sc1 = *(simple_cluster * const *) a; + simple_cluster *sc2 = *(simple_cluster * const *) b; + + return tree_int_cst_compare (sc1->get_low (), sc2->get_high ()); +} + +/* Dump constructed CLUSTERS with prefix MESSAGE. */ + +static void +dump_clusters (vec<cluster *> *clusters, const char *message) +{ + if (dump_file) + { + fprintf (dump_file, ";; %s: ", message); + for (unsigned i = 0; i < clusters->length (); i++) + (*clusters)[i]->dump (dump_file, dump_flags & TDF_DETAILS); + fprintf (dump_file, "\n"); + } +} + +/* Return true when the switch can be expanded with a jump table or + a bit test (at least partially). */ + +bool +if_chain::is_beneficial () +{ + profile_probability prob = profile_probability::uninitialized (); + + auto_vec<cluster *> clusters; + clusters.create (m_entries.length ()); + + for (unsigned i = 0; i < m_entries.length (); i++) + { + condition_info *info = m_entries[i]; + for (unsigned j = 0; j < info->m_ranges.length (); j++) + { + range_entry *range = &info->m_ranges[j]; + basic_block bb = info->m_true_edge->dest; + bool has_forwarder = !info->m_true_edge_phi_mapping.is_empty (); + clusters.safe_push (new simple_cluster (range->low, range->high, + NULL_TREE, bb, prob, + has_forwarder)); + } + } + + /* Sort clusters and merge them. */ + auto_vec<cluster *> filtered_clusters; + filtered_clusters.create (16); + clusters.qsort (cluster_cmp); + simple_cluster *left = static_cast<simple_cluster *> (clusters[0]); + filtered_clusters.safe_push (left); + + for (unsigned i = 1; i < clusters.length (); i++) + { + simple_cluster *right = static_cast<simple_cluster *> (clusters[i]); + tree type = TREE_TYPE (left->get_low ()); + tree pos_one = build_int_cst (type, 1); + if (!left->m_has_forward_bb + && !right->m_has_forward_bb + && left->m_case_bb == right->m_case_bb) + { + tree next = int_const_binop (PLUS_EXPR, left->get_high (), pos_one); + if (tree_int_cst_equal (next, right->get_low ())) + { + left->set_high (right->get_high ()); + continue; + } + } + + left = static_cast<simple_cluster *> (clusters[i]); + filtered_clusters.safe_push (left); + } + + dump_clusters (&filtered_clusters, "Canonical GIMPLE case clusters"); + + vec<cluster *> output + = jump_table_cluster::find_jump_tables (filtered_clusters); + bool r = output.length () < filtered_clusters.length (); + if (r) + dump_clusters (&output, "JT can be built"); + output.release (); + if (r) + return true; + + output = bit_test_cluster::find_bit_tests (filtered_clusters); + r = output.length () < filtered_clusters.length (); + if (r) + dump_clusters (&output, "BT can be built"); + output.release (); + return r; +} + +/* Build case label with MIN and MAX values of a given basic block DEST. */ + +static tree +build_case_label (tree index_type, tree min, tree max, basic_block dest) +{ + if (min != NULL_TREE && index_type != TREE_TYPE (min)) + min = fold_convert (index_type, min); + if (max != NULL_TREE && index_type != TREE_TYPE (max)) + max = fold_convert (index_type, max); + + tree label = gimple_block_label (dest); + return build_case_label (min, min == max ? NULL_TREE : max, label); +} + +/* Compare two integer constants. */ + +static int +label_cmp (const void *a, const void *b) +{ + const_tree l1 = *(const const_tree *) a; + const_tree l2 = *(const const_tree *) b; + + return tree_int_cst_compare (CASE_LOW (l1), CASE_LOW (l2)); +} + +/* Convert a given if CHAIN into a switch GIMPLE statement. */ + +static void +convert_if_conditions_to_switch (if_chain *chain) +{ + if (!dbg_cnt (if_to_switch)) + return; + + auto_vec<tree> labels; + unsigned entries = chain->m_entries.length (); + condition_info *first_cond = chain->m_entries[0]; + condition_info *last_cond = chain->m_entries[entries - 1]; + + edge default_edge = last_cond->m_false_edge; + basic_block default_bb = default_edge->dest; + + gimple_stmt_iterator gsi = gsi_for_stmt (first_cond->m_cond); + tree index_type = TREE_TYPE (first_cond->m_ranges[0].exp); + for (unsigned i = 0; i < entries; i++) + { + condition_info *info = chain->m_entries[i]; + basic_block case_bb = info->m_true_edge->dest; + + /* Create a forwarder block if needed. */ + if (!info->m_true_edge_phi_mapping.is_empty ()) + { + info->m_forwarder_bb = split_edge (info->m_true_edge); + case_bb = info->m_forwarder_bb; + } + + for (unsigned j = 0; j < info->m_ranges.length (); j++) + labels.safe_push (build_case_label (index_type, + info->m_ranges[j].low, + info->m_ranges[j].high, + case_bb)); + default_bb = info->m_false_edge->dest; + + if (i == 0) + { + remove_edge (first_cond->m_true_edge); + remove_edge (first_cond->m_false_edge); + } + else + delete_basic_block (info->m_bb); + + make_edge (first_cond->m_bb, case_bb, 0); + } + + labels.qsort (label_cmp); + + edge e = find_edge (first_cond->m_bb, default_bb); + if (e == NULL) + e = make_edge (first_cond->m_bb, default_bb, 0); + gswitch *s + = gimple_build_switch (first_cond->m_ranges[0].exp, + build_case_label (index_type, NULL_TREE, + NULL_TREE, default_bb), + labels); + + gsi_remove (&gsi, true); + gsi_insert_before (&gsi, s, GSI_NEW_STMT); + + if (dump_file) + { + fprintf (dump_file, "Expanded into a new gimple STMT: "); + print_gimple_stmt (dump_file, s, 0, TDF_SLIM); + putc ('\n', dump_file); + } + + /* Fill up missing PHI node arguments. */ + for (unsigned i = 0; i < chain->m_entries.length (); ++i) + { + condition_info *info = chain->m_entries[i]; + for (unsigned j = 0; j < info->m_true_edge_phi_mapping.length (); ++j) + { + std::pair<gphi *, tree> item = info->m_true_edge_phi_mapping[j]; + add_phi_arg (item.first, item.second, + single_succ_edge (info->m_forwarder_bb), + UNKNOWN_LOCATION); + } + } + + /* Fill up missing PHI nodes for the default BB. */ + for (unsigned j = 0; j < last_cond->m_false_edge_phi_mapping.length (); ++j) + { + std::pair<gphi *, tree> item = last_cond->m_false_edge_phi_mapping[j]; + add_phi_arg (item.first, item.second, e, UNKNOWN_LOCATION); + } +} + +/* Identify an index variable used in BB in a GIMPLE condition. + Save information about the condition into CONDITIONS_IN_BBS. */ + +static void +find_conditions (basic_block bb, + hash_map<basic_block, condition_info> *conditions_in_bbs) +{ + gimple_stmt_iterator gsi = gsi_last_nondebug_bb (bb); + if (gsi_end_p (gsi)) + return; + + gcond *cond = dyn_cast<gcond *> (gsi_stmt (gsi)); + if (cond == NULL) + return; + + if (!no_side_effect_bb (bb)) + return; + + tree lhs = gimple_cond_lhs (cond); + tree rhs = gimple_cond_rhs (cond); + tree_code code = gimple_cond_code (cond); + + condition_info info (cond); + + gassign *def; + if (code == NE_EXPR + && TREE_CODE (lhs) == SSA_NAME + && (def = dyn_cast<gassign *> (SSA_NAME_DEF_STMT (lhs))) != NULL + && integer_zerop (rhs)) + { + enum tree_code rhs_code = gimple_assign_rhs_code (def); + if (rhs_code == BIT_IOR_EXPR) + { + info.m_ranges.safe_grow (2, true); + init_range_entry (&info.m_ranges[0], gimple_assign_rhs1 (def), NULL); + init_range_entry (&info.m_ranges[1], gimple_assign_rhs2 (def), NULL); + } + } + else + { + info.m_ranges.safe_grow (1, true); + init_range_entry (&info.m_ranges[0], NULL_TREE, cond); + } + + /* All identified ranges must have equal expression and IN_P flag. */ + if (!info.m_ranges.is_empty ()) + { + edge true_edge, false_edge; + tree expr = info.m_ranges[0].exp; + bool in_p = info.m_ranges[0].in_p; + + extract_true_false_edges_from_block (bb, &true_edge, &false_edge); + info.m_true_edge = in_p ? true_edge : false_edge; + info.m_false_edge = in_p ? false_edge : true_edge; + + for (unsigned i = 0; i < info.m_ranges.length (); ++i) + if (info.m_ranges[i].exp == NULL_TREE + || info.m_ranges[i].low == NULL_TREE + || info.m_ranges[i].high == NULL_TREE) + return; + + for (unsigned i = 1; i < info.m_ranges.length (); ++i) + if (info.m_ranges[i].exp != expr + || info.m_ranges[i].in_p != in_p) + return; + + info.record_phi_mapping (info.m_true_edge, + &info.m_true_edge_phi_mapping); + info.record_phi_mapping (info.m_false_edge, + &info.m_false_edge_phi_mapping); + conditions_in_bbs->put (bb, info); + } + +} + +namespace { + +const pass_data pass_data_if_to_switch = +{ + GIMPLE_PASS, /* type */ + "iftoswitch", /* name */ + OPTGROUP_NONE, /* optinfo_flags */ + TV_TREE_IF_TO_SWITCH, /* tv_id */ + ( PROP_cfg | PROP_ssa ), /* properties_required */ + 0, /* properties_provided */ + 0, /* properties_destroyed */ + 0, /* todo_flags_start */ + TODO_cleanup_cfg | TODO_update_ssa /* todo_flags_finish */ +}; + +class pass_if_to_switch : public gimple_opt_pass +{ +public: + pass_if_to_switch (gcc::context *ctxt) + : gimple_opt_pass (pass_data_if_to_switch, ctxt) + {} + + /* opt_pass methods: */ + virtual bool gate (function *) + { + return (jump_table_cluster::is_enabled () + || bit_test_cluster::is_enabled ()); + } + + virtual unsigned int execute (function *); + +}; // class pass_if_to_switch + +unsigned int +pass_if_to_switch::execute (function *fun) +{ + auto_vec<if_chain *> all_candidates; + hash_map<basic_block, condition_info> conditions_in_bbs; + + basic_block bb; + FOR_EACH_BB_FN (bb, fun) + find_conditions (bb, &conditions_in_bbs); + + int *rpo = XNEWVEC (int, n_basic_blocks_for_fn (fun)); + unsigned n = pre_and_rev_post_order_compute_fn (fun, NULL, rpo, false); + + auto_bitmap seen_bbs; + for (int i = n - 1; i >= 0; --i) + { + basic_block bb = BASIC_BLOCK_FOR_FN (fun, rpo[i]); + if (bitmap_bit_p (seen_bbs, bb->index)) + continue; + + bitmap_set_bit (seen_bbs, bb->index); + condition_info *info = conditions_in_bbs.get (bb); + if (info) + { + if_chain *chain = new if_chain (); + chain->m_entries.safe_push (info); + /* Try to find a chain starting in this BB. */ + while (true) + { + if (!single_pred_p (gimple_bb (info->m_cond))) + break; + edge e = single_pred_edge (gimple_bb (info->m_cond)); + condition_info *info2 = conditions_in_bbs.get (e->src); + if (!info2 || info->m_ranges[0].exp != info2->m_ranges[0].exp) + break; + + chain->m_entries.safe_push (info2); + bitmap_set_bit (seen_bbs, e->src->index); + info = info2; + } + + chain->m_entries.reverse (); + if (chain->m_entries.length () >= 3 + && chain->check_non_overlapping_cases () + && chain->is_beneficial ()) + { + gcond *cond = chain->m_entries[0]->m_cond; + expanded_location loc = expand_location (gimple_location (cond)); + if (dump_file) + { + fprintf (dump_file, "Condition chain (at %s:%d) with %d BBs " + "transformed into a switch statement.\n", + loc.file, loc.line, + chain->m_entries.length ()); + } + all_candidates.safe_push (chain); + } + } + } + + for (unsigned i = 0; i < all_candidates.length (); i++) + { + convert_if_conditions_to_switch (all_candidates[i]); + delete all_candidates[i]; + } + + free (rpo); + free_dominance_info (CDI_DOMINATORS); + + if (!all_candidates.is_empty ()) + mark_virtual_operands_for_renaming (fun); + + return 0; +} + +} // anon namespace + +gimple_opt_pass * +make_pass_if_to_switch (gcc::context *ctxt) +{ + return new pass_if_to_switch (ctxt); +} diff --git a/gcc/passes.def b/gcc/passes.def index f865bdc19ac..10d7eeb091b 100644 --- a/gcc/passes.def +++ b/gcc/passes.def @@ -93,6 +93,7 @@ along with GCC; see the file COPYING3. If not see NEXT_PASS (pass_phiopt, true /* early_p */); NEXT_PASS (pass_modref); NEXT_PASS (pass_tail_recursion); + NEXT_PASS (pass_if_to_switch); NEXT_PASS (pass_convert_switch); NEXT_PASS (pass_cleanup_eh); NEXT_PASS (pass_profile); diff --git a/gcc/testsuite/g++.dg/tree-ssa/if-to-switch-1.C b/gcc/testsuite/g++.dg/tree-ssa/if-to-switch-1.C new file mode 100644 index 00000000000..0f9c8d35ff9 --- /dev/null +++ b/gcc/testsuite/g++.dg/tree-ssa/if-to-switch-1.C @@ -0,0 +1,25 @@ +/* { dg-do compile } */ +/* { dg-options "-O2 -fdump-tree-iftoswitch" } */ + +void fancy_abort(const char *, int, const char *); + +enum machine_mode +{ + MODE_FLOAT, + MODE_DECIMAL_FLOAT, + MODE_COMPLEX_INT, + MODE_COMPLEX_FLOAT, + MODE_VECTOR_BOOL, + MODE_VECTOR_FLOAT +} extern const mode_class; + +void tree_node() { + if (mode_class) + mode_class == MODE_FLOAT || mode_class == MODE_DECIMAL_FLOAT || + mode_class == MODE_COMPLEX_FLOAT || mode_class == MODE_VECTOR_FLOAT + ? fancy_abort("aaa", 2, __FUNCTION__), + 0 : 0; + int g = 0; +} + +/* { dg-final { scan-tree-dump "Condition chain \\(at .*\\) with 3 BBs transformed into a switch statement." "iftoswitch" } } */ diff --git a/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-1.c b/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-1.c new file mode 100644 index 00000000000..94a0db649e4 --- /dev/null +++ b/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-1.c @@ -0,0 +1,35 @@ +/* { dg-do compile } */ +/* { dg-options "-O2 -fdump-tree-iftoswitch" } */ + +int global; +int foo (); + +int main(int argc, char **argv) +{ + if (argc == 1) + foo (); + else if (argc == 2) + { + global += 1; + } + else if (argc == 3) + { + foo (); + foo (); + } + else if (argc == 4) + { + foo (); + } + else if (argc == 5) + { + global = 2; + } + else + global -= 123; + + global -= 12; + return 0; +} + +/* { dg-final { scan-tree-dump "Condition chain \\(at .*if-to-switch-1.c:9\\) with 5 BBs transformed into a switch statement." "iftoswitch" } } */ diff --git a/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-2.c b/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-2.c new file mode 100644 index 00000000000..b114e74ac37 --- /dev/null +++ b/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-2.c @@ -0,0 +1,11 @@ +/* { dg-do compile } */ +/* { dg-options "-O2 -fdump-tree-iftoswitch" } */ + +int IsHTMLWhitespaceNoRange(int aChar) +{ + return aChar == 0x0001 || aChar == 0x000A || + aChar == 0x000C || aChar == 0x000E || + aChar == 0x0020; +} + +/* { dg-final { scan-tree-dump "Condition chain \\(at .*if-to-switch-2.c:7\\) with 3 BBs transformed into a switch statement." "iftoswitch" } } */ diff --git a/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-3.c b/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-3.c new file mode 100644 index 00000000000..e157039e75b --- /dev/null +++ b/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-3.c @@ -0,0 +1,11 @@ +/* { dg-do compile } */ +/* { dg-options "-O2 -fdump-tree-iftoswitch" } */ + +int IsHTMLWhitespace(int aChar) +{ + return aChar == 0x0009 || aChar == 0x000A || + aChar == 0x000C || aChar == 0x000D || + aChar == 0x0020 || aChar == 0x0030; +} + +/* { dg-final { scan-tree-dump "Condition chain \\(at .*if-to-switch-3.c:8\\) with 3 BBs transformed into a switch statement." "iftoswitch" } } */ diff --git a/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-4.c b/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-4.c new file mode 100644 index 00000000000..3ae006f6ca2 --- /dev/null +++ b/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-4.c @@ -0,0 +1,36 @@ +/* { dg-do compile } */ +/* { dg-options "-O2 -fdump-tree-iftoswitch" } */ + +int global; +int foo (); + +int main(int argc, char **argv) +{ + if (argc == 1) + foo (); + else if (argc == 2) + { + global += 1; + } + else if (argc == 3) + { + foo (); + foo (); + } + else if (argc == 4) + { + foo (); + } + /* This will be removed with EVRP. */ + else if (argc == 1) + { + global = 2; + } + else + global -= 123; + + global -= 12; + return 0; +} + +/* { dg-final { scan-tree-dump-not "Condition chain" "iftoswitch" } } */ diff --git a/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-5.c b/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-5.c new file mode 100644 index 00000000000..46ea5b627c8 --- /dev/null +++ b/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-5.c @@ -0,0 +1,12 @@ +/* { dg-do compile } */ +/* { dg-options "-O2 -fdump-tree-iftoswitch" } */ + +int crud (unsigned char c) +{ + return (((((((((((int) c == 46) || (int) c == 44) + || (int) c == 58) || (int) c == 59) || (int) c == 60) + || (int) c == 62) || (int) c == 34) || (int) c == 92) + || (int) c == 39) != 0); +} + +/* { dg-final { scan-tree-dump "Condition chain \\(at .*if-to-switch-5.c:9\\) with 5 BBs transformed into a switch statement." "iftoswitch" } } */ diff --git a/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-6.c b/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-6.c new file mode 100644 index 00000000000..7af323ae251 --- /dev/null +++ b/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-6.c @@ -0,0 +1,42 @@ +/* { dg-do compile } */ +/* { dg-options "-O2 -fdump-tree-iftoswitch" } */ + +int global; +int foo (); + +int main(int argc, char **argv) +{ + if (argc >= 1 && argc <= 10) + foo (); + else if (argc == 12) + { + global += 1; + } + else if (argc == 13) + { + foo (); + foo (); + } + else if (argc == 14) + { + foo (); + } + /* This will be removed with EVRP. */ + else if (argc == 5) + { + global = 2; + } + /* This will be removed with EVRP. */ + else if (argc >= 7 && argc <= 9) + { + global = 2; + } + + else + global -= 123; + + global -= 12; + return 0; +} + +/* { dg-final { scan-tree-dump-not "Condition chain" "iftoswitch" } } */ diff --git a/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-7.c b/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-7.c new file mode 100644 index 00000000000..1a919bf025a --- /dev/null +++ b/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-7.c @@ -0,0 +1,25 @@ +/* { dg-do compile } */ +/* { dg-options "-O2 -fdump-tree-iftoswitch" } */ + +int global; + +int foo(int a) +{ + int x = 0; + for (unsigned i = 0; i < a; i++) + { + if (a == 2) + { + global += 123; + x = 1; + } + else if (a == 3) + x = 2; + else if (a == 10) + x = 3; + } + + return x; +} + +/* { dg-final { scan-tree-dump-not "Condition chain " "iftoswitch" } } */ diff --git a/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-8.c b/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-8.c new file mode 100644 index 00000000000..a5f1a1eae18 --- /dev/null +++ b/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-8.c @@ -0,0 +1,27 @@ +/* { dg-do compile } */ +/* { dg-options "-O2 -fdump-tree-iftoswitch" } */ + +int global; +int global1; +int global2; +int global3; + +int foo(int a, int b) +{ + int x = 0; + for (unsigned i = 0; i < a; i++) + { + if (b == 1) + global += 2; + else if (a == 2) + global = 123; + else if (a == 3) + global1 = 1234; + else if (a == 10) + global2 = 12345; + else if (a == 1) + global2 = 123456; + } +} + +/* { dg-final { scan-tree-dump-not "Condition chain" "iftoswitch" } } */ diff --git a/gcc/testsuite/gcc.dg/tree-ssa/pr96480.c b/gcc/testsuite/gcc.dg/tree-ssa/pr96480.c index f2a91ef9909..cc04721c1df 100644 --- a/gcc/testsuite/gcc.dg/tree-ssa/pr96480.c +++ b/gcc/testsuite/gcc.dg/tree-ssa/pr96480.c @@ -1,6 +1,6 @@ /* PR tree-optimization/96480 */ /* { dg-do compile } */ -/* { dg-options "-O2 -fdump-tree-optimized" } */ +/* { dg-options "-O2 -fdump-tree-optimized -fno-bit-tests" } */ /* { dg-final { scan-tree-dump " = _\[0-9]* <= 3;" "optimized" } } */ int v[4]; diff --git a/gcc/testsuite/gcc.dg/tree-ssa/reassoc-32.c b/gcc/testsuite/gcc.dg/tree-ssa/reassoc-32.c index 944362ad076..093e7a57a27 100644 --- a/gcc/testsuite/gcc.dg/tree-ssa/reassoc-32.c +++ b/gcc/testsuite/gcc.dg/tree-ssa/reassoc-32.c @@ -1,6 +1,6 @@ /* { dg-do run { target { ! "m68k*-*-* mmix*-*-* bfin*-*-* v850*-*-* moxie*-*-* cris*-*-* m32c*-*-* fr30*-*-* mcore*-*-* powerpc*-*-* xtensa*-*-*"} } } */ -/* { dg-options "-O2 -fno-inline -fdump-tree-reassoc1-details --param logical-op-non-short-circuit=1" } */ +/* { dg-options "-O2 -fno-inline -fdump-tree-reassoc1-details --param logical-op-non-short-circuit=1 -fno-bit-tests" } */ /* { dg-additional-options "-mbranch-cost=2" { target branch_cost } } */ diff --git a/gcc/timevar.def b/gcc/timevar.def index 08c21c04009..ee87718f3e4 100644 --- a/gcc/timevar.def +++ b/gcc/timevar.def @@ -292,6 +292,7 @@ DEFTIMEVAR (TV_VAR_TRACKING , "variable tracking") DEFTIMEVAR (TV_VAR_TRACKING_DATAFLOW , "var-tracking dataflow") DEFTIMEVAR (TV_VAR_TRACKING_EMIT , "var-tracking emit") DEFTIMEVAR (TV_TREE_IFCOMBINE , "tree if-combine") +DEFTIMEVAR (TV_TREE_IF_TO_SWITCH , "if to switch conversion") DEFTIMEVAR (TV_TREE_UNINIT , "uninit var analysis") DEFTIMEVAR (TV_PLUGIN_INIT , "plugin initialization") DEFTIMEVAR (TV_PLUGIN_RUN , "plugin execution") diff --git a/gcc/tree-pass.h b/gcc/tree-pass.h index 62e5b696cab..f8adb902345 100644 --- a/gcc/tree-pass.h +++ b/gcc/tree-pass.h @@ -374,6 +374,7 @@ extern gimple_opt_pass *make_pass_empty_loop (gcc::context *ctxt); extern gimple_opt_pass *make_pass_graphite (gcc::context *ctxt); extern gimple_opt_pass *make_pass_graphite_transforms (gcc::context *ctxt); extern gimple_opt_pass *make_pass_if_conversion (gcc::context *ctxt); +extern gimple_opt_pass *make_pass_if_to_switch (gcc::context *ctxt); extern gimple_opt_pass *make_pass_loop_distribution (gcc::context *ctxt); extern gimple_opt_pass *make_pass_vectorize (gcc::context *ctxt); extern gimple_opt_pass *make_pass_simduid_cleanup (gcc::context *ctxt); diff --git a/gcc/tree-ssa-reassoc.c b/gcc/tree-ssa-reassoc.c index a2ca1713d4b..96765bdd3f2 100644 --- a/gcc/tree-ssa-reassoc.c +++ b/gcc/tree-ssa-reassoc.c @@ -51,6 +51,7 @@ along with GCC; see the file COPYING3. If not see #include "builtins.h" #include "gimplify.h" #include "case-cfn-macros.h" +#include "tree-ssa-reassoc.h" /* This is a simple global reassociation pass. It is, in part, based on the LLVM pass of the same name (They do some things more/less @@ -188,15 +189,6 @@ static struct int pows_created; } reassociate_stats; -/* Operator, rank pair. */ -struct operand_entry -{ - unsigned int rank; - unsigned int id; - tree op; - unsigned int count; - gimple *stmt_to_insert; -}; static object_allocator<operand_entry> operand_entry_pool ("operand entry pool"); @@ -226,7 +218,7 @@ static bool reassoc_stmt_dominates_stmt_p (gimple *, gimple *); /* Wrapper around gsi_remove, which adjusts gimple_uid of debug stmts possibly added by gsi_remove. */ -bool +static bool reassoc_remove_stmt (gimple_stmt_iterator *gsi) { gimple *stmt = gsi_stmt (*gsi); @@ -2406,18 +2398,7 @@ optimize_ops_list (enum tree_code opcode, For more information see comments above fold_test_range in fold-const.c, this implementation is for GIMPLE. */ -struct range_entry -{ - tree exp; - tree low; - tree high; - bool in_p; - bool strict_overflow_p; - unsigned int idx, next; -}; -void dump_range_entry (FILE *file, struct range_entry *r); -void debug_range_entry (struct range_entry *r); /* Dump the range entry R to FILE, skipping its expression if SKIP_EXP. */ @@ -2447,7 +2428,7 @@ debug_range_entry (struct range_entry *r) an SSA_NAME and STMT argument is ignored, otherwise STMT argument should be a GIMPLE_COND. */ -static void +void init_range_entry (struct range_entry *r, tree exp, gimple *stmt) { int in_p; @@ -4284,7 +4265,7 @@ suitable_cond_bb (basic_block bb, basic_block test_bb, basic_block *other_bb, range test optimization, all SSA_NAMEs set in the bb are consumed in the bb and there are no PHIs. */ -static bool +bool no_side_effect_bb (basic_block bb) { gimple_stmt_iterator gsi; diff --git a/gcc/tree-ssa-reassoc.h b/gcc/tree-ssa-reassoc.h new file mode 100644 index 00000000000..dc7f59f1eca --- /dev/null +++ b/gcc/tree-ssa-reassoc.h @@ -0,0 +1,48 @@ +/* Reassociation for trees. + Copyright (C) 2020 Free Software Foundation, Inc. + +This file is part of GCC. + +GCC is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 3, or (at your option) +any later version. + +GCC is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GCC; see the file COPYING3. If not see +<http://www.gnu.org/licenses/>. */ + +#ifndef GCC_SSA_REASSOC_H +#define GCC_SSA_REASSOC_H + +/* Operator, rank pair. */ +struct operand_entry +{ + unsigned int rank; + unsigned int id; + tree op; + unsigned int count; + gimple *stmt_to_insert; +}; + +struct range_entry +{ + tree exp; + tree low; + tree high; + bool in_p; + bool strict_overflow_p; + unsigned int idx, next; +}; + +void dump_range_entry (FILE *file, struct range_entry *r); +void debug_range_entry (struct range_entry *r); +void init_range_entry (struct range_entry *r, tree exp, gimple *stmt); +bool no_side_effect_bb (basic_block bb); + +#endif /* GCC_SSA_REASSOC_H */ diff --git a/gcc/tree-switch-conversion.h b/gcc/tree-switch-conversion.h index 7515e952eb3..62cfde168c8 100644 --- a/gcc/tree-switch-conversion.h +++ b/gcc/tree-switch-conversion.h @@ -48,8 +48,8 @@ class cluster { public: /* Constructor. */ - cluster (tree case_label_expr, basic_block case_bb, profile_probability prob, - profile_probability subtree_prob); + inline cluster (tree case_label_expr, basic_block case_bb, + profile_probability prob, profile_probability subtree_prob); /* Destructor. */ virtual ~cluster () @@ -121,8 +121,9 @@ class simple_cluster: public cluster { public: /* Constructor. */ - simple_cluster (tree low, tree high, tree case_label_expr, - basic_block case_bb, profile_probability prob); + inline simple_cluster (tree low, tree high, tree case_label_expr, + basic_block case_bb, profile_probability prob, + bool has_forward_bb = false); /* Destructor. */ ~simple_cluster () @@ -146,6 +147,11 @@ public: return m_high; } + void set_high (tree high) + { + m_high = high; + } + void debug () { @@ -182,12 +188,16 @@ public: /* True if case is a range. */ bool m_range_p; + + /* True if the case will use a forwarder BB. */ + bool m_has_forward_bb; }; simple_cluster::simple_cluster (tree low, tree high, tree case_label_expr, - basic_block case_bb, profile_probability prob): + basic_block case_bb, profile_probability prob, + bool has_forward_bb): cluster (case_label_expr, case_bb, prob, prob), - m_low (low), m_high (high) + m_low (low), m_high (high), m_has_forward_bb (has_forward_bb) { m_range_p = m_high != NULL; if (m_high == NULL) @@ -271,7 +281,7 @@ public: static inline unsigned int case_values_threshold (void); /* Return whether jump table expansion is allowed. */ - static bool is_enabled (void); + static inline bool is_enabled (void); }; /* A GIMPLE switch statement can be expanded to a short sequence of bit-wise -- 2.28.0 [-- Attachment #3: 0001-Add-fbit-tests-option.patch --] [-- Type: text/x-patch, Size: 4229 bytes --] From 7984458480ceadc6b3c43ed952c21d55305bc567 Mon Sep 17 00:00:00 2001 From: Martin Liska <mliska@suse.cz> Date: Fri, 2 Oct 2020 14:12:06 +0200 Subject: [PATCH 1/2] Add -fbit-tests option. gcc/ChangeLog: * common.opt: Add new -fbit-tests option. * doc/invoke.texi: Document the option. * tree-switch-conversion.c (bit_test_cluster::find_bit_tests): Use the option. * tree-switch-conversion.h (is_enabled): New function. gcc/testsuite/ChangeLog: * gcc.dg/tree-ssa/switch-4.c: New test. --- gcc/common.opt | 4 ++++ gcc/doc/invoke.texi | 8 +++++++- gcc/testsuite/gcc.dg/tree-ssa/switch-4.c | 25 ++++++++++++++++++++++++ gcc/tree-switch-conversion.c | 3 +++ gcc/tree-switch-conversion.h | 6 ++++++ 5 files changed, 45 insertions(+), 1 deletion(-) create mode 100644 gcc/testsuite/gcc.dg/tree-ssa/switch-4.c diff --git a/gcc/common.opt b/gcc/common.opt index 7e789d1c47f..aa3d75c2357 100644 --- a/gcc/common.opt +++ b/gcc/common.opt @@ -1936,6 +1936,10 @@ fjump-tables Common Var(flag_jump_tables) Init(1) Optimization Use jump tables for sufficiently large switch statements. +fbit-tests +Common Var(flag_bit_tests) Init(1) Optimization +Use bit tests for sufficiently large switch statements. + fkeep-inline-functions Common Report Var(flag_keep_inline_functions) Generate code for functions even if they are fully inlined. diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi index 631a119181c..9ee62197b51 100644 --- a/gcc/doc/invoke.texi +++ b/gcc/doc/invoke.texi @@ -635,7 +635,7 @@ Objective-C and Objective-C++ Dialects}. -fno-gnu-unique @gol -finhibit-size-directive -fcommon -fno-ident @gol -fpcc-struct-return -fpic -fPIC -fpie -fPIE -fno-plt @gol --fno-jump-tables @gol +-fno-jump-tables -fno-bit-tests @gol -frecord-gcc-switches @gol -freg-struct-return -fshort-enums -fshort-wchar @gol -fverbose-asm -fpack-struct[=@var{n}] @gol @@ -15879,6 +15879,12 @@ building code that forms part of a dynamic linker and cannot reference the address of a jump table. On some targets, jump tables do not require a GOT and this option is not needed. +@item -fno-bit-tests +@opindex fno-bit-tests +@opindex fbit-tests +Do not use bit tests for switch statements even where it would be +more efficient than other code generation strategies. + @item -ffixed-@var{reg} @opindex ffixed Treat the register named @var{reg} as a fixed register; generated code diff --git a/gcc/testsuite/gcc.dg/tree-ssa/switch-4.c b/gcc/testsuite/gcc.dg/tree-ssa/switch-4.c new file mode 100644 index 00000000000..5953ef34e9b --- /dev/null +++ b/gcc/testsuite/gcc.dg/tree-ssa/switch-4.c @@ -0,0 +1,25 @@ +/* { dg-do compile { target { { x86_64-*-* aarch64-*-* ia64-*-* powerpc64-*-* } && lp64 } } } */ +/* { dg-options "-O2 -fno-bit-tests -fdump-tree-switchlower1" } */ + +int global; + +int foo (int x) +{ + switch (x) { + case 0: + case 10: + return 1; + case 20: + case 30: + case 62: + return 2; + case 1000: + case 1010: + case 1025 ... 1030: + return 1; + default: + return 0; + } +} + +/* { dg-final { scan-tree-dump-not "BT:" "switchlower1" } } */ diff --git a/gcc/tree-switch-conversion.c b/gcc/tree-switch-conversion.c index 03a1fe632d0..426462e856b 100644 --- a/gcc/tree-switch-conversion.c +++ b/gcc/tree-switch-conversion.c @@ -1310,6 +1310,9 @@ jump_table_cluster::is_beneficial (const vec<cluster *> &, vec<cluster *> bit_test_cluster::find_bit_tests (vec<cluster *> &clusters) { + if (!is_enabled ()) + return clusters.copy (); + unsigned l = clusters.length (); auto_vec<min_cluster_item> min; min.reserve (l + 1); diff --git a/gcc/tree-switch-conversion.h b/gcc/tree-switch-conversion.h index dbfd9eecba2..7515e952eb3 100644 --- a/gcc/tree-switch-conversion.h +++ b/gcc/tree-switch-conversion.h @@ -411,6 +411,12 @@ public: basic_block case_bb, profile_probability prob); + /* Return whether bit test expansion is allowed. */ + static inline bool is_enabled (void) + { + return flag_bit_tests; + } + /* True when the jump table handles an entire switch statement. */ bool m_handles_entire_switch; -- 2.28.0 [-- Attachment #4: if-to-switch-v2.txt --] [-- Type: text/plain, Size: 75697 bytes --] Condition chain (at /home/marxin/Programming/gcc2/libcpp/init.c:555) with 7 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/libcpp/macro.c:819) with 10 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/libcpp/macro.c:1170) with 5 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/libcpp/expr.c:371) with 5 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/libcpp/expr.c:391) with 5 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/libcpp/expr.c:411) with 5 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/libcpp/expr.c:431) with 5 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/libcpp/lex.c:2341) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/libcpp/lex.c:1856) with 14 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/libcpp/lex.c:4147) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/libdecnumber/decContext.c:358) with 13 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/libdecnumber/decNumber.c:3322) with 10 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/libcpp/init.c:555) with 7 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/libcpp/macro.c:819) with 10 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/libcpp/macro.c:1170) with 5 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/libcpp/expr.c:371) with 5 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/libcpp/expr.c:391) with 5 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/libcpp/expr.c:411) with 5 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/libcpp/expr.c:431) with 5 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/libcpp/lex.c:2341) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/libcpp/lex.c:1856) with 14 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/libcpp/lex.c:4147) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/simplify-rtx.c:2274) with 4 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/simplify-rtx.c:2272) with 4 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/simplify-rtx.c:2294) with 4 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/rtl.h:884) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/cfgcleanup.c:1239) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/cfgcleanup.c:1173) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/cfgcleanup.c:1173) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/rtl.h:884) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/godump.c:246) with 6 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/godump.c:239) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/rtl.h:884) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/regcprop.c:788) with 4 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/sched-deps.c:4277) with 4 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/rtl.h:884) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/sched-deps.c:4732) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/sched-deps.c:2922) with 4 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/tree-vect-generic.c:1296) with 4 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/tree-vect-generic.c:2104) with 11 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:2748) with 4 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:2748) with 4 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:2748) with 4 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:2748) with 4 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/sync.md:2781) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/sync.md:2806) with 4 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/sync.md:2833) with 4 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/sync.md:2929) with 3 BBs transformed into a switch statement. 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Condition chain (at /home/marxin/Programming/gcc2/gcc/tree-chrec.c:950) with 6 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/tree-data-ref.c:710) with 4 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/trans-mem.c:369) with 4 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/trans-mem.c:415) with 4 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/rtl.h:884) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/rtl.h:884) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/rtl.h:884) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/dwarf2out.c:5311) with 4 BBs transformed into a switch statement. 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Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:571) with 6 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:19177) with 5 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:886) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:878) with 4 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:2976) with 15 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:503) with 5 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:926) with 5 BBs transformed into a switch statement. 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Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:560) with 10 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:552) with 6 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:481) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:14473) with 4 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/omp-low.c:637) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386-expand.c:15748) with 5 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386-expand.c:15747) with 4 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386-expand.c:15660) with 5 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386-expand.c:15659) with 4 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/rtl.h:884) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386-expand.c:16909) with 5 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386-expand.c:1712) with 4 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386-expand.c:20114) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386-expand.c:401) with 22 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386-expand.c:380) with 21 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386-expand.c:8133) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386-expand.c:8127) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386-expand.c:2706) with 5 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386-expand.c:2740) with 4 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386-expand.c:3488) with 4 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386-expand.c:4026) with 4 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386-expand.c:4573) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386-expand.c:6566) with 4 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386-expand.c:19452) with 4 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/rtl.h:884) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/rtl.h:884) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/gimple-ssa-sprintf.c:944) with 6 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/read-md.c:472) with 4 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/rtl.h:884) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/tree.h:5138) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/tree-ssa-structalias.c:6634) with 5 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/rtl.h:884) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/cfgexpand.c:6149) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/cfgexpand.c:4440) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/cp/mangle.c:1890) with 6 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/tree.h:5138) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/cp/call.c:881) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/cp/search.c:462) with 7 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/cp/search.c:518) with 6 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/cp/name-lookup.c:2984) with 7 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/cp/name-lookup.c:2943) with 7 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/cp/parser.c:2743) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/cp/parser.c:2756) with 4 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/cp/parser.c:31009) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/cp/parser.c:32737) with 7 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/cp/parser.c:34106) with 5 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/cp/parser.c:28568) with 4 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/cp/parser.c:26423) with 4 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/cp/parser.c:18110) with 5 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/cp/parser.c:7524) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/cp/parser.c:41219) with 7 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/cp/parser.c:13540) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/cp/semantics.c:3597) with 7 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/cp/decl2.c:1358) with 5 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/cp/decl2.c:5577) with 7 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/cp/typeck.c:9473) with 6 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/cp/lambda.c:278) with 7 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/cp/lambda.c:1466) with 7 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/cp/lambda.c:288) with 7 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/cp/lambda.c:300) with 6 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/cp/lambda.c:450) with 7 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/cp/lambda.c:452) with 7 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/cp/lambda.c:1490) with 7 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/cp/lambda.c:1495) with 7 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/cp/tree.c:71) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/cp/expr.c:117) with 6 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/cp/expr.c:169) with 6 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/cp/pt.c:26899) with 17 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/cp/pt.c:18064) with 7 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/cp/pt.c:7440) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/cp/pt.c:13012) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/cp/decl.c:2494) with 7 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/cp/decl.c:2492) with 7 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/cp/decl.c:914) with 7 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/cp/decl.c:911) with 7 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/cp/decl.c:3965) with 4 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/cp/constexpr.c:5682) with 7 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/cp/constexpr.c:7642) with 7 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/cp/constexpr.c:7646) with 6 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/cp/lex.c:695) with 6 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/cp/class.c:1252) with 7 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/cp/class.c:1252) with 7 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/cp/class.c:1229) with 7 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/optabs-query.h:89) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/optabs-libfuncs.c:247) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/optabs-libfuncs.c:259) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/rtl.h:884) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/rtl.h:884) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/lto/lto-lang.c:1112) with 18 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/rtl.h:884) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/gensupport.c:3266) with 7 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/gensupport.c:3261) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/read-md.c:472) with 4 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/genautomata.c:951) with 8 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/genrecog.c:703) with 4 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/genpreds.c:794) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/rtl.h:884) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/gengtype.c:2491) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/gengtype.h:344) with 5 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/genpeep.c:250) with 7 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/rtl.h:884) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/rtl.h:896) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/toplev.c:2228) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/rtl.h:884) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/dce.c:594) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/tree-ssa-ccp.c:856) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/tree-ssa-alias.c:4089) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/ddg.c:237) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/rtl.h:884) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/lto-streamer-out.c:1922) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/lto-streamer-out.c:162) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/lto-streamer-out.c:527) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/rtl.h:884) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/rtl.h:884) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.c:13142) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.c:19031) with 17 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.c:19030) with 8 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.c:19018) with 16 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.c:19012) with 4 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.c:19003) with 10 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.c:19042) with 8 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.c:19063) with 8 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.c:20965) with 5 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.c:20963) with 5 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.c:6746) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.c:16395) with 24 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.c:6726) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.c:19201) with 5 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.c:19200) with 5 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.c:21587) with 7 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.c:19254) with 5 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.c:19279) with 4 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.c:19300) with 4 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/rtl.h:884) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.c:3328) with 22 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.c:3392) with 21 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.c:6797) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.c:6801) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.c:6599) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.c:12250) with 8 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.c:19603) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.c:1675) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.c:8546) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.c:6623) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.c:8512) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.c:7110) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.c:7823) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.c:8734) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.c:8435) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.c:8468) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.c:8447) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.c:7085) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.c:7308) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.c:7295) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.c:7197) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.c:7193) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.c:7000) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.c:1853) with 5 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.c:8381) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.c:8359) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.c:8320) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.c:8300) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.c:8282) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.c:8049) with 4 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.c:8033) with 4 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.c:8019) with 4 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.c:8006) with 4 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.c:7997) with 4 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.c:7990) with 4 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.c:7984) with 4 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.c:7931) with 4 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.c:7929) with 4 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.c:7928) with 4 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.c:7964) with 4 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.c:9128) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.c:9157) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.c:9072) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.c:8947) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.c:8971) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.c:13017) with 6 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.c:16724) with 22 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.c:16598) with 22 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.c:2884) with 14 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.c:3838) with 4 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/sse.md:1185) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/sse.md:1185) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/sse.md:1185) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/sse.md:1185) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/sse.md:1185) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/sse.md:1185) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/sse.md:1185) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/sse.md:1185) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/sse.md:1185) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/sse.md:1185) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/sse.md:1185) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/sse.md:1185) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/sse.md:1067) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/sse.md:1067) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/sse.md:1067) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/sse.md:1067) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/sse.md:1067) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/sse.md:1067) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/sse.md:1067) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/sse.md:1067) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/sse.md:1067) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/sse.md:1067) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/sse.md:1067) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/sse.md:1067) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/rtl.h:884) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386-features.c:547) with 10 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/rtl.h:884) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/expmed.c:6272) with 7 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/rtl.h:884) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/read-rtl-function.c:1400) with 10 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/rtl.h:884) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/rtl.h:884) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/rtl.h:884) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/varasm.c:7305) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/rtl.h:884) with 3 BBs transformed into a switch statement. Condition chain (at insn-dfatab.c:2840) with 6 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:3662) with 8 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:3658) with 8 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:3654) with 8 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:3650) with 8 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:2497) with 12 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:2453) with 14 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:15505) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:20645) with 6 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:26030) with 6 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:16987) with 5 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:16983) with 4 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:16979) with 5 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:16975) with 4 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:16987) with 5 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:16983) with 4 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:16979) with 5 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:16975) with 4 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:16128) with 5 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:16124) with 4 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:16120) with 5 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:16116) with 4 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:16128) with 5 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:16124) with 4 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:16120) with 5 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:16116) with 4 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:16387) with 6 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:16158) with 6 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:16158) with 6 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:16171) with 6 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:16171) with 6 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:23580) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:23516) with 4 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:23512) with 4 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:23508) with 5 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:23504) with 5 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:29654) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:29590) with 4 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:29586) with 4 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:29582) with 5 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:29578) with 5 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/rtl.h:884) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/asan.h:168) with 9 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/rtl.h:884) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/builtins.c:12207) with 4 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/builtins.c:4705) with 8 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/rtl.h:884) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/loop-iv.c:1569) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/rtl.h:884) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/cse.c:3350) with 5 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/ipa-devirt.c:1238) with 4 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/predicates.md:1309) with 4 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/predicates.md:1313) with 5 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/predicates.md:1739) with 8 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/predicates.md:1811) with 9 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/rtl.h:884) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/rtl.h:884) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/rtl.h:884) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386-options.c:1176) with 5 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/rtl.h:884) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/gimple-pretty-print.c:390) with 5 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/rtlanal.c:6192) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/rtl.h:884) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/rtl.h:896) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/rtl.h:884) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/rtl.h:884) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/rtl.h:884) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/ifcvt.c:359) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/rtl.h:884) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/gimple-expr.h:97) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/tree-object-size.c:312) with 5 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/rtl.h:884) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/rtl.h:884) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/fortran/convert.c:105) with 6 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/fortran/check.c:587) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/fortran/parse.c:1819) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/fortran/symbol.c:1766) with 5 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/fortran/intrinsic.c:208) with 8 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/fortran/intrinsic.c:4929) with 4 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/fortran/dump-parse-tree.c:3262) with 5 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/fortran/resolve.c:3307) with 6 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/fortran/scanner.c:2320) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/fortran/scanner.c:2215) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/fortran/trans-decl.c:2692) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/fortran/expr.c:1118) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/fortran/decl.c:8423) with 6 BBs transformed into a switch statement. Condition chain (at generic-match.c:18862) with 6 BBs transformed into a switch statement. Condition chain (at generic-match.c:16134) with 6 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/stor-layout.c:486) with 5 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/rtl.h:884) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/rtl.h:884) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/tree-pretty-print.c:1740) with 7 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/rtl.h:884) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/tree.h:5138) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/fold-const.c:2115) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/fold-const.c:8332) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/fold-const.c:8837) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/fold-const.c:8719) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/tree-ssa-dce.c:964) with 12 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/rtl.h:884) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/rtl.h:884) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/rtl.h:884) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/rtl.h:884) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/gimple-expr.h:97) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/rtl.h:884) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/print-tree.c:691) with 5 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/fixed-value.c:1112) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/fixed-value.c:840) with 4 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/fixed-value.c:827) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/fixed-value.c:896) with 4 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/tree.c:14261) with 4 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/tree.c:14751) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/tree.c:14669) with 6 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/tree.c:14648) with 7 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/tree.c:14561) with 5 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/tree.c:7083) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/tree.c:10840) with 5 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/tree.c:11697) with 5 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/rtl.h:884) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/cselib.c:2968) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/rtl.h:884) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/sel-sched-ir.c:2987) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/rtl.h:884) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/rtl.h:884) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/gimple-expr.h:97) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/combine-stack-adj.c:189) with 4 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/combine-stack-adj.c:412) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/combine-stack-adj.c:406) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/rtl.h:884) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/lto-streamer-in.c:1713) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/rtl.h:884) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/rtl.h:884) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/dwarf2cfi.c:2546) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/rtl.h:884) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/rtl.h:884) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/rtl.h:896) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/rtl.h:884) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/rtl.h:884) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/reload.c:6536) with 6 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/optabs-query.c:731) with 5 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/rtl.h:884) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/rtl.h:884) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/rtl.h:884) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/tree-call-cdce.c:561) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/tree-vect-data-refs.c:136) with 4 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/rtl.h:884) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:19430) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:19430) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:19430) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:19430) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:19441) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/rtl.h:884) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/tree-tailcall.c:656) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/tree-tailcall.c:440) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/c-family/c-attribs.c:3717) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/c-family/c-attribs.c:1962) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/c-family/c-lex.c:545) with 7 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/c-family/c-format.c:3439) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/c-family/c-ada-spec.c:469) with 4 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/c-family/c-common.c:2394) with 4 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/c-family/c-common.c:2349) with 18 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/c-family/c-common.c:2877) with 5 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/c-family/c-omp.c:2244) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/tree.h:5138) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/c-family/c-warn.c:1818) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/c-family/c-warn.c:1824) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/c-family/c-warn.c:1832) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/c-family/c-warn.c:1843) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/c-family/c-warn.c:1849) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/c-family/c-warn.c:512) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/c/c-parser.c:384) with 5 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/c/c-parser.c:1298) with 4 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/c/c-parser.c:1262) with 4 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/c/c-decl.c:10942) with 8 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/c/c-decl.c:10772) with 9 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/c/c-decl.c:10829) with 10 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/c/c-decl.c:10890) with 8 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/c/c-decl.c:10993) with 7 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/c/c-decl.c:11042) with 11 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/c/gimple-parser.c:1579) with 4 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/tree.h:5138) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/c/c-typeck.c:8031) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/gcc.c:9224) with 6 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/gcc.c:3254) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/gcc.c:7020) with 7 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/rtl.h:884) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/tree-vect-slp.c:900) with 5 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/rtl.h:884) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/rtl.h:884) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/rtl.h:884) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/lto-opts.c:104) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/rtl.h:884) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/postreload.c:1452) with 4 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/rtl.h:884) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/rtl.h:884) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/reload1.c:6616) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/rtl.h:884) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/combine.c:11890) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/combine.c:9592) with 4 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/combine.c:7549) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/combine.c:5930) with 4 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/combine.c:6750) with 4 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/combine.c:6712) with 4 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/combine.c:6695) with 4 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/combine.c:3935) with 6 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/combine.c:2745) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/rtl.h:884) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/tree.h:5138) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/gimple-expr.h:97) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/gimplify.c:14589) with 14 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/rtl.h:884) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/early-remat.c:2519) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/recog.c:3598) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/rtl.h:884) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/recog.c:3292) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/recog.c:3289) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/recog.c:3370) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/rtl.h:884) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/tree-ssa-scopedtables.c:745) with 5 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/rtl.h:884) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/rtl.h:884) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:16043) with 6 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:3643) with 8 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:3639) with 8 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:3635) with 8 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:3631) with 8 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:2442) with 12 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:2398) with 14 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:15652) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:20651) with 6 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:25947) with 6 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:17133) with 5 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:17129) with 4 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:17125) with 5 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:17121) with 4 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:17133) with 5 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:17129) with 4 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:17125) with 5 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:17121) with 4 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:17405) with 5 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:17401) with 4 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:17397) with 5 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:17393) with 4 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:17405) with 5 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:17401) with 4 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:17397) with 5 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:17393) with 4 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:17085) with 6 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:16872) with 6 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:16872) with 6 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:16925) with 6 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:16925) with 6 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:23767) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:23703) with 4 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:23699) with 4 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:23695) with 5 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:23691) with 5 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:29631) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:29567) with 4 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:29563) with 4 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:29559) with 5 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/config/i386/i386.md:29555) with 5 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/ipa-prop.c:678) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/gimple-expr.h:97) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/gimple-ssa-isolate-paths.c:241) with 4 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/rtl.h:884) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/tree-ssa-operands.c:587) with 4 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/rtl.h:884) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/rtl.h:884) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/optabs.c:7215) with 4 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/optabs.c:2033) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/optabs.c:2114) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/optabs.c:1874) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/optabs.c:1315) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/optabs.c:1277) with 5 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/optabs.c:1101) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/rtl.h:884) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/var-tracking.c:799) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/dojump.c:1026) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/rtl.h:884) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/gengtype.c:2491) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/gengtype.h:344) with 5 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/rtl.h:884) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/rtl.h:884) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/rtl.h:896) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/rtl.h:884) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/asan.h:168) with 9 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/rtl.h:884) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/rtl.h:884) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/rtl.h:884) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/rtl.h:884) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/rtl.h:884) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/rtl.h:884) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/rtl.h:884) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/tree-ssa-sccvn.c:5777) with 5 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/gcc/gimple-ssa-strength-reduction.c:2138) with 3 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/zlib/deflate.c:363) with 6 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/libiberty/cp-demangle.c:1561) with 9 BBs transformed into a switch statement. Condition chain (at /home/marxin/Programming/gcc2/libiberty/cp-demangle.c:1561) with 9 BBs transformed into a switch statement. ^ permalink raw reply [flat|nested] 49+ messages in thread
* Re: [PATCH v2] Add if-chain to switch conversion pass. 2020-10-16 14:04 ` [PATCH v2] " Martin Liška @ 2020-11-06 12:31 ` Richard Biener 2020-11-09 12:26 ` Martin Liška 0 siblings, 1 reply; 49+ messages in thread From: Richard Biener @ 2020-11-06 12:31 UTC (permalink / raw) To: Martin Liška; +Cc: David Malcolm, Jakub Jelinek, GCC Patches, Jan Hubicka On Fri, Oct 16, 2020 at 4:04 PM Martin Liška <mliska@suse.cz> wrote: > > Hello. > > There's another version of the patch that should be based on what > I discussed with Richi and Jakub: > > - the first patch introduces a new option -fbit-tests that analogue to -fjump-tables > and will control the new if-to-switch conversion pass > > - the second patch adds the pass > - I share code with tree-ssa-reassoc.c (range_entry and init_range_entry) > - a local discovery phase is run first > - later than these local BBs are chained into a candidate list for the conversion > > I'm also sending transformed chains for 'make all-host' (620 transformations). > Patch can bootstrap on x86_64-linux-gnu and survives regression tests. -static bool +bool no_side_effect_bb (basic_block bb) { exporting this with this name is dangerous I think because the function seems to allow side-effects in the last stmt - not sure exactly what it tries to allow - there's no comment to that :/ + free (rpo); + free_dominance_info (CDI_DOMINATORS); + + if (!all_candidates.is_empty ()) + mark_virtual_operands_for_renaming (fun); please avoid freeing dominance info when there was no change done (move it to the !all_candidates.is_empty () block). + basic_block bb; + FOR_EACH_BB_FN (bb, fun) + find_conditions (bb, &conditions_in_bbs); + if we didn't find any conditions (or found just one?) we can elide the rest of the function, no? + if_chain *chain = new if_chain (); + chain->m_entries.safe_push (info); + /* Try to find a chain starting in this BB. */ + while (true) + { + if (!single_pred_p (gimple_bb (info->m_cond))) + break; + edge e = single_pred_edge (gimple_bb (info->m_cond)); + condition_info *info2 = conditions_in_bbs.get (e->src); + if (!info2 || info->m_ranges[0].exp != info2->m_ranges[0].exp) + break; + + chain->m_entries.safe_push (info2); + bitmap_set_bit (seen_bbs, e->src->index); + info = info2; + } so while we now record conditions per BB the above doesn't really allow matching a binary tree. What I was thinking of is to record if_chain * per BB as well and look at successors, thus (pseudo-code) if (block ends in cond) if (if_chain on true edge && if_chain on false edge) try merge else if (if_chain on true edge && this-cond tests same var) try merge else if (if_chan on false edge && ...) try merge record if_chain for block where merging would eventually detach the if_chains from the successors. For now we'd just handle the true (and maybe false) edge combos to handle linear chains. Walking reverse RPO (I'm not 100% sure reverse RPO is what we want here, but guess it will work fine for now) will gather chains accordingly. When merging from a successor to a BB fails we push the successor chain to the candidate list. +/* Algorithm of the pass runs in the following steps: + a) We walk basic blocks in DOMINATOR order so that we first reach + a first condition of a future switch. + b) We follow false edges of a if-else-chain and we record chain + of GIMPLE conditions. These blocks are only used for comparison + of a common SSA_NAME and we do not allow any side effect. + c) We remove all basic blocks (except first) of such chain and + GIMPLE switch replaces the condition in the first basic block. + d) We move all GIMPLE statements in the removed blocks into the + first one. */ the overall comment is now a bit out-of-date? Please remove the PHI mapping as I outlined in earlier review. The 0001-Add-fbit-tests-option.patch is OK for trunk. Thanks, Richard. > Thoughts? > Thanks, > Martin ^ permalink raw reply [flat|nested] 49+ messages in thread
* Re: [PATCH v2] Add if-chain to switch conversion pass. 2020-11-06 12:31 ` Richard Biener @ 2020-11-09 12:26 ` Martin Liška 2020-11-16 12:21 ` Richard Biener 0 siblings, 1 reply; 49+ messages in thread From: Martin Liška @ 2020-11-09 12:26 UTC (permalink / raw) To: Richard Biener; +Cc: David Malcolm, Jakub Jelinek, GCC Patches, Jan Hubicka On 11/6/20 1:31 PM, Richard Biener wrote: > On Fri, Oct 16, 2020 at 4:04 PM Martin Liška <mliska@suse.cz> wrote: >> >> Hello. >> >> There's another version of the patch that should be based on what >> I discussed with Richi and Jakub: >> >> - the first patch introduces a new option -fbit-tests that analogue to -fjump-tables >> and will control the new if-to-switch conversion pass >> >> - the second patch adds the pass >> - I share code with tree-ssa-reassoc.c (range_entry and init_range_entry) >> - a local discovery phase is run first >> - later than these local BBs are chained into a candidate list for the conversion >> >> I'm also sending transformed chains for 'make all-host' (620 transformations). >> Patch can bootstrap on x86_64-linux-gnu and survives regression tests. > > -static bool > +bool > no_side_effect_bb (basic_block bb) > { > > exporting this with this name is dangerous I think because the function > seems to allow side-effects in the last stmt - not sure exactly what > it tries to allow - there's no comment to that :/ All right, will fix that. > > + free (rpo); > + free_dominance_info (CDI_DOMINATORS); > + > + if (!all_candidates.is_empty ()) > + mark_virtual_operands_for_renaming (fun); > > please avoid freeing dominance info when there was no change done > (move it to the !all_candidates.is_empty () block). > > + basic_block bb; > + FOR_EACH_BB_FN (bb, fun) > + find_conditions (bb, &conditions_in_bbs); > + > > if we didn't find any conditions (or found just one?) we can elide the > rest of the function, no? Sure. > > + if_chain *chain = new if_chain (); > + chain->m_entries.safe_push (info); > + /* Try to find a chain starting in this BB. */ > + while (true) > + { > + if (!single_pred_p (gimple_bb (info->m_cond))) > + break; > + edge e = single_pred_edge (gimple_bb (info->m_cond)); > + condition_info *info2 = conditions_in_bbs.get (e->src); > + if (!info2 || info->m_ranges[0].exp != info2->m_ranges[0].exp) > + break; > + > + chain->m_entries.safe_push (info2); > + bitmap_set_bit (seen_bbs, e->src->index); > + info = info2; > + } > > so while we now record conditions per BB the above doesn't really > allow matching a binary tree. Yes. The pass currently only supports conditions of the following form: 1) index in {min, max} 2) index out of {min, max} which means one edge in form 1). I don't see how can be useful handling of a situation where both edges contain a such-chain? Can you please come up with a test-case that can be interesting? > What I was thinking of is to record > if_chain * per BB as well and look at successors, thus (pseudo-code) > > if (block ends in cond) > if (if_chain on true edge && if_chain on false edge) > try merge > else if (if_chain on true edge && this-cond tests same var) > try merge > else if (if_chan on false edge && ...) > try merge > record if_chain for block > > where merging would eventually detach the if_chains from the successors. > For now we'd just handle the true (and maybe false) edge combos to handle > linear chains. Walking reverse RPO (I'm not 100% sure reverse RPO is what > we want here, but guess it will work fine for now) will gather chains > accordingly. > When merging from a successor to a BB fails we push the successor chain > to the candidate list. > > +/* Algorithm of the pass runs in the following steps: > + a) We walk basic blocks in DOMINATOR order so that we first reach > + a first condition of a future switch. > + b) We follow false edges of a if-else-chain and we record chain > + of GIMPLE conditions. These blocks are only used for comparison > + of a common SSA_NAME and we do not allow any side effect. > + c) We remove all basic blocks (except first) of such chain and > + GIMPLE switch replaces the condition in the first basic block. > + d) We move all GIMPLE statements in the removed blocks into the > + first one. */ > > the overall comment is now a bit out-of-date? > > Please remove the PHI mapping as I outlined in earlier review. > > The 0001-Add-fbit-tests-option.patch is OK for trunk. Installed to master. Martin > > Thanks, > Richard. > > >> Thoughts? >> Thanks, >> Martin ^ permalink raw reply [flat|nested] 49+ messages in thread
* Re: [PATCH v2] Add if-chain to switch conversion pass. 2020-11-09 12:26 ` Martin Liška @ 2020-11-16 12:21 ` Richard Biener 2020-11-18 12:25 ` Martin Liška 0 siblings, 1 reply; 49+ messages in thread From: Richard Biener @ 2020-11-16 12:21 UTC (permalink / raw) To: Martin Liška; +Cc: David Malcolm, Jakub Jelinek, GCC Patches, Jan Hubicka On Mon, Nov 9, 2020 at 1:26 PM Martin Liška <mliska@suse.cz> wrote: > > On 11/6/20 1:31 PM, Richard Biener wrote: > > On Fri, Oct 16, 2020 at 4:04 PM Martin Liška <mliska@suse.cz> wrote: > >> > >> Hello. > >> > >> There's another version of the patch that should be based on what > >> I discussed with Richi and Jakub: > >> > >> - the first patch introduces a new option -fbit-tests that analogue to -fjump-tables > >> and will control the new if-to-switch conversion pass > >> > >> - the second patch adds the pass > >> - I share code with tree-ssa-reassoc.c (range_entry and init_range_entry) > >> - a local discovery phase is run first > >> - later than these local BBs are chained into a candidate list for the conversion > >> > >> I'm also sending transformed chains for 'make all-host' (620 transformations). > >> Patch can bootstrap on x86_64-linux-gnu and survives regression tests. > > > > -static bool > > +bool > > no_side_effect_bb (basic_block bb) > > { > > > > exporting this with this name is dangerous I think because the function > > seems to allow side-effects in the last stmt - not sure exactly what > > it tries to allow - there's no comment to that :/ > > All right, will fix that. > > > > > + free (rpo); > > + free_dominance_info (CDI_DOMINATORS); > > + > > + if (!all_candidates.is_empty ()) > > + mark_virtual_operands_for_renaming (fun); > > > > please avoid freeing dominance info when there was no change done > > (move it to the !all_candidates.is_empty () block). > > > > + basic_block bb; > > + FOR_EACH_BB_FN (bb, fun) > > + find_conditions (bb, &conditions_in_bbs); > > + > > > > if we didn't find any conditions (or found just one?) we can elide the > > rest of the function, no? > > Sure. > > > > > + if_chain *chain = new if_chain (); > > + chain->m_entries.safe_push (info); > > + /* Try to find a chain starting in this BB. */ > > + while (true) > > + { > > + if (!single_pred_p (gimple_bb (info->m_cond))) > > + break; > > + edge e = single_pred_edge (gimple_bb (info->m_cond)); > > + condition_info *info2 = conditions_in_bbs.get (e->src); > > + if (!info2 || info->m_ranges[0].exp != info2->m_ranges[0].exp) > > + break; > > + > > + chain->m_entries.safe_push (info2); > > + bitmap_set_bit (seen_bbs, e->src->index); > > + info = info2; > > + } > > > > so while we now record conditions per BB the above doesn't really > > allow matching a binary tree. > > Yes. The pass currently only supports conditions of the following form: > 1) index in {min, max} > 2) index out of {min, max} > > which means one edge in form 1). I don't see how can be useful handling > of a situation where both edges contain a such-chain? Can you please > come up with a test-case that can be interesting? Sth like if (val < 10) { if (val == 1) ... else if (val == 2) ... else default; } else { if (val == 99) ... else if (val == 42) ... else gcc_unreachable (); } but the most trivial thing would be to feed the pass the balanced-tree generated by switch expansion where I would expect us to be able to detect it as the original switch again. > > What I was thinking of is to record > > if_chain * per BB as well and look at successors, thus (pseudo-code) > > > > if (block ends in cond) > > if (if_chain on true edge && if_chain on false edge) > > try merge > > else if (if_chain on true edge && this-cond tests same var) > > try merge > > else if (if_chan on false edge && ...) > > try merge > > record if_chain for block > > > > where merging would eventually detach the if_chains from the successors. > > For now we'd just handle the true (and maybe false) edge combos to handle > > linear chains. Walking reverse RPO (I'm not 100% sure reverse RPO is what > > we want here, but guess it will work fine for now) will gather chains > > accordingly. > > When merging from a successor to a BB fails we push the successor chain > > to the candidate list. > > > > +/* Algorithm of the pass runs in the following steps: > > + a) We walk basic blocks in DOMINATOR order so that we first reach > > + a first condition of a future switch. > > + b) We follow false edges of a if-else-chain and we record chain > > + of GIMPLE conditions. These blocks are only used for comparison > > + of a common SSA_NAME and we do not allow any side effect. > > + c) We remove all basic blocks (except first) of such chain and > > + GIMPLE switch replaces the condition in the first basic block. > > + d) We move all GIMPLE statements in the removed blocks into the > > + first one. */ > > > > the overall comment is now a bit out-of-date? > > > > Please remove the PHI mapping as I outlined in earlier review. > > > > The 0001-Add-fbit-tests-option.patch is OK for trunk. > > Installed to master. > > Martin > > > > > Thanks, > > Richard. > > > > > >> Thoughts? > >> Thanks, > >> Martin > ^ permalink raw reply [flat|nested] 49+ messages in thread
* Re: [PATCH v2] Add if-chain to switch conversion pass. 2020-11-16 12:21 ` Richard Biener @ 2020-11-18 12:25 ` Martin Liška 2020-11-19 14:46 ` Richard Biener 0 siblings, 1 reply; 49+ messages in thread From: Martin Liška @ 2020-11-18 12:25 UTC (permalink / raw) To: Richard Biener; +Cc: David Malcolm, Jakub Jelinek, GCC Patches, Jan Hubicka On 11/16/20 1:21 PM, Richard Biener wrote: > but the most trivial thing would be to feed the pass the > balanced-tree generated by switch expansion where I > would expect us to be able to detect it as the original switch again. Well, if we want to support such matching, then please deffer it to a phase 2. I don't see it a common pattern that people write such a code in wild. Right now, we have some local analysis and one can eventually build a more advanced algorithm on top of it. Can we please make a progress for GCC 11 with the current approach that will cover quite some interesting if-chains? Thanks, Martin ^ permalink raw reply [flat|nested] 49+ messages in thread
* Re: [PATCH v2] Add if-chain to switch conversion pass. 2020-11-18 12:25 ` Martin Liška @ 2020-11-19 14:46 ` Richard Biener 2020-11-20 8:57 ` Martin Liška 0 siblings, 1 reply; 49+ messages in thread From: Richard Biener @ 2020-11-19 14:46 UTC (permalink / raw) To: Martin Liška; +Cc: David Malcolm, Jakub Jelinek, GCC Patches, Jan Hubicka On Wed, Nov 18, 2020 at 1:25 PM Martin Liška <mliska@suse.cz> wrote: > > On 11/16/20 1:21 PM, Richard Biener wrote: > > but the most trivial thing would be to feed the pass the > > balanced-tree generated by switch expansion where I > > would expect us to be able to detect it as the original switch again. > > Well, if we want to support such matching, then please deffer it to a phase 2. > I don't see it a common pattern that people write such a code in wild. I didn't expect do actually support the matching just have the code structured in a way to make it easier. I guess it's close enough to go forward with the current scheme though. > Right now, we have some local analysis and one can eventually build a more advanced > algorithm on top of it. Can we please make a progress for GCC 11 with the current > approach that will cover quite some interesting if-chains? OK, so can you send an updated patch? Thanks, Richard. > Thanks, > Martin ^ permalink raw reply [flat|nested] 49+ messages in thread
* Re: [PATCH v2] Add if-chain to switch conversion pass. 2020-11-19 14:46 ` Richard Biener @ 2020-11-20 8:57 ` Martin Liška 2020-11-20 14:37 ` Richard Biener 0 siblings, 1 reply; 49+ messages in thread From: Martin Liška @ 2020-11-20 8:57 UTC (permalink / raw) To: Richard Biener; +Cc: David Malcolm, Jakub Jelinek, GCC Patches, Jan Hubicka [-- Attachment #1: Type: text/plain, Size: 98 bytes --] On 11/19/20 3:46 PM, Richard Biener wrote: > OK, so can you send an updated patch? Sure. Martin [-- Attachment #2: 0001-Add-if-chain-to-switch-conversion-pass.patch --] [-- Type: text/x-patch, Size: 36604 bytes --] From 76e8424bd54d15fb3b2a2bdb4179fa8773500381 Mon Sep 17 00:00:00 2001 From: Martin Liska <mliska@suse.cz> Date: Fri, 28 Aug 2020 10:26:13 +0200 Subject: [PATCH] Add if-chain to switch conversion pass. gcc/ChangeLog: PR tree-optimization/14799 PR ipa/88702 * Makefile.in: Add gimple-if-to-switch.o. * dbgcnt.def (DEBUG_COUNTER): Add new debug counter. * passes.def: Include new pass_if_to_switch pass. * timevar.def (TV_TREE_IF_TO_SWITCH): New timevar. * tree-pass.h (make_pass_if_to_switch): New. * tree-ssa-reassoc.c (struct operand_entry): Move to the header. (dump_range_entry): Move to header file. (debug_range_entry): Likewise. (no_side_effect_bb): Make it global. * tree-switch-conversion.h (simple_cluster::simple_cluster): Add inline for couple of functions in order to prevent error about multiple defined symbols. * gimple-if-to-switch.cc: New file. * tree-ssa-reassoc.h: New file. gcc/testsuite/ChangeLog: PR tree-optimization/14799 PR ipa/88702 * gcc.dg/tree-ssa/pr96480.c: Disable if-to-switch conversion. * gcc.dg/tree-ssa/reassoc-32.c: Likewise. * g++.dg/tree-ssa/if-to-switch-1.C: New test. * gcc.dg/tree-ssa/if-to-switch-1.c: New test. * gcc.dg/tree-ssa/if-to-switch-2.c: New test. * gcc.dg/tree-ssa/if-to-switch-3.c: New test. * gcc.dg/tree-ssa/if-to-switch-4.c: New test. * gcc.dg/tree-ssa/if-to-switch-5.c: New test. * gcc.dg/tree-ssa/if-to-switch-6.c: New test. * gcc.dg/tree-ssa/if-to-switch-7.c: New test. * gcc.dg/tree-ssa/if-to-switch-8.c: New test. --- gcc/Makefile.in | 1 + gcc/dbgcnt.def | 1 + gcc/gimple-if-to-switch.cc | 565 ++++++++++++++++++ gcc/passes.def | 1 + .../g++.dg/tree-ssa/if-to-switch-1.C | 25 + .../gcc.dg/tree-ssa/if-to-switch-1.c | 35 ++ .../gcc.dg/tree-ssa/if-to-switch-2.c | 11 + .../gcc.dg/tree-ssa/if-to-switch-3.c | 11 + .../gcc.dg/tree-ssa/if-to-switch-4.c | 36 ++ .../gcc.dg/tree-ssa/if-to-switch-5.c | 12 + .../gcc.dg/tree-ssa/if-to-switch-6.c | 42 ++ .../gcc.dg/tree-ssa/if-to-switch-7.c | 25 + .../gcc.dg/tree-ssa/if-to-switch-8.c | 27 + gcc/testsuite/gcc.dg/tree-ssa/pr96480.c | 2 +- gcc/testsuite/gcc.dg/tree-ssa/reassoc-32.c | 2 +- gcc/timevar.def | 1 + gcc/tree-pass.h | 1 + gcc/tree-ssa-reassoc.c | 27 +- gcc/tree-ssa-reassoc.h | 48 ++ gcc/tree-switch-conversion.h | 24 +- 20 files changed, 865 insertions(+), 32 deletions(-) create mode 100644 gcc/gimple-if-to-switch.cc create mode 100644 gcc/testsuite/g++.dg/tree-ssa/if-to-switch-1.C create mode 100644 gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-1.c create mode 100644 gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-2.c create mode 100644 gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-3.c create mode 100644 gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-4.c create mode 100644 gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-5.c create mode 100644 gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-6.c create mode 100644 gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-7.c create mode 100644 gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-8.c create mode 100644 gcc/tree-ssa-reassoc.h diff --git a/gcc/Makefile.in b/gcc/Makefile.in index 778ec09c75d..16be66fefc6 100644 --- a/gcc/Makefile.in +++ b/gcc/Makefile.in @@ -1364,6 +1364,7 @@ OBJS = \ gimple-array-bounds.o \ gimple-builder.o \ gimple-expr.o \ + gimple-if-to-switch.o \ gimple-iterator.o \ gimple-fold.o \ gimple-laddress.o \ diff --git a/gcc/dbgcnt.def b/gcc/dbgcnt.def index a5b6bb66a6c..c0744b23f65 100644 --- a/gcc/dbgcnt.def +++ b/gcc/dbgcnt.def @@ -170,6 +170,7 @@ DEBUG_COUNTER (if_after_combine) DEBUG_COUNTER (if_after_reload) DEBUG_COUNTER (if_conversion) DEBUG_COUNTER (if_conversion_tree) +DEBUG_COUNTER (if_to_switch) DEBUG_COUNTER (ipa_cp_bits) DEBUG_COUNTER (ipa_cp_values) DEBUG_COUNTER (ipa_cp_vr) diff --git a/gcc/gimple-if-to-switch.cc b/gcc/gimple-if-to-switch.cc new file mode 100644 index 00000000000..25ef45175a7 --- /dev/null +++ b/gcc/gimple-if-to-switch.cc @@ -0,0 +1,565 @@ +/* If-elseif-else to switch conversion pass + Copyright (C) 2020 Free Software Foundation, Inc. + +This file is part of GCC. + +GCC is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 3, or (at your option) +any later version. + +GCC is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GCC; see the file COPYING3. If not see +<http://www.gnu.org/licenses/>. */ + +/* Algorithm of the pass runs in the following steps: + a) We walk basic blocks in DOMINATOR order so that we first reach + a first condition of a future switch. + b) We follow false edges of a if-else-chain and we record chain + of GIMPLE conditions. These blocks are only used for comparison + of a common SSA_NAME and we do not allow any side effect. + c) We remove all basic blocks (except first) of such chain and + GIMPLE switch replaces the condition in the first basic block. + d) We move all GIMPLE statements in the removed blocks into the + first one. */ + +#include "config.h" +#include "system.h" +#include "coretypes.h" +#include "backend.h" +#include "rtl.h" +#include "tree.h" +#include "gimple.h" +#include "tree-pass.h" +#include "ssa.h" +#include "gimple-pretty-print.h" +#include "fold-const.h" +#include "gimple-iterator.h" +#include "tree-cfg.h" +#include "tree-dfa.h" +#include "tree-cfgcleanup.h" +#include "alias.h" +#include "tree-ssa-loop.h" +#include "diagnostic.h" +#include "cfghooks.h" +#include "tree-into-ssa.h" +#include "cfganal.h" +#include "dbgcnt.h" +#include "target.h" +#include "alloc-pool.h" +#include "tree-switch-conversion.h" +#include "tree-ssa-reassoc.h" + +using namespace tree_switch_conversion; + +struct condition_info +{ + typedef vec<std::pair<gphi *, tree>> mapping_vec; + + condition_info (gcond *cond): m_cond (cond), m_bb (gimple_bb (cond)), + m_forwarder_bb (NULL), m_ranges (), m_true_edge (NULL), m_false_edge (NULL), + m_true_edge_phi_mapping (), m_false_edge_phi_mapping () + { + m_ranges.create (0); + } + + /* Recond PHI mapping for an original edge E and save these into + vector VEC. */ + void record_phi_mapping (edge e, mapping_vec *vec); + + gcond *m_cond; + basic_block m_bb; + basic_block m_forwarder_bb; + vec<range_entry> m_ranges; + edge m_true_edge; + edge m_false_edge; + mapping_vec m_true_edge_phi_mapping; + mapping_vec m_false_edge_phi_mapping; +}; + +/* Recond PHI mapping for an original edge E and save these into vector VEC. */ + +void +condition_info::record_phi_mapping (edge e, mapping_vec *vec) +{ + for (gphi_iterator gsi = gsi_start_phis (e->dest); !gsi_end_p (gsi); + gsi_next (&gsi)) + { + gphi *phi = gsi.phi (); + if (!virtual_operand_p (gimple_phi_result (phi))) + { + tree arg = PHI_ARG_DEF_FROM_EDGE (phi, e); + vec->safe_push (std::make_pair (phi, arg)); + } + } +} + +/* Master structure for one if to switch conversion candidate. */ + +struct if_chain +{ + /* Default constructor. */ + if_chain (): m_entries () + { + m_entries.create (2); + } + + /* Default destructor. */ + ~if_chain () + { + m_entries.release (); + } + + /* Verify that all case ranges do not overlap. */ + bool check_non_overlapping_cases (); + + /* Return true when the switch can be expanded with a jump table or + a bit test (at least partially). */ + bool is_beneficial (); + + /* If chain entries. */ + vec<condition_info *> m_entries; +}; + +/* Compare two case ranges by minimum value. */ + +static int +range_cmp (const void *a, const void *b) +{ + const range_entry *re1 = *(const range_entry * const *) a; + const range_entry *re2 = *(const range_entry * const *) b; + + return tree_int_cst_compare (re1->low, re2->low); +} + +/* Verify that all case ranges do not overlap. */ + +bool +if_chain::check_non_overlapping_cases () +{ + auto_vec<range_entry *> all_ranges; + for (unsigned i = 0; i < m_entries.length (); i++) + for (unsigned j = 0; j < m_entries[i]->m_ranges.length (); j++) + all_ranges.safe_push (&m_entries[i]->m_ranges[j]); + + all_ranges.qsort (range_cmp); + + for (unsigned i = 0; i < all_ranges.length () - 1; i++) + { + range_entry *left = all_ranges[i]; + range_entry *right = all_ranges[i + 1]; + if (tree_int_cst_le (left->low, right->low) + && tree_int_cst_le (right->low, left->high)) + return false; + } + + return true; +} + +/* Compare clusters by minimum value. */ + +static int +cluster_cmp (const void *a, const void *b) +{ + simple_cluster *sc1 = *(simple_cluster * const *) a; + simple_cluster *sc2 = *(simple_cluster * const *) b; + + return tree_int_cst_compare (sc1->get_low (), sc2->get_high ()); +} + +/* Dump constructed CLUSTERS with prefix MESSAGE. */ + +static void +dump_clusters (vec<cluster *> *clusters, const char *message) +{ + if (dump_file) + { + fprintf (dump_file, ";; %s: ", message); + for (unsigned i = 0; i < clusters->length (); i++) + (*clusters)[i]->dump (dump_file, dump_flags & TDF_DETAILS); + fprintf (dump_file, "\n"); + } +} + +/* Return true when the switch can be expanded with a jump table or + a bit test (at least partially). */ + +bool +if_chain::is_beneficial () +{ + profile_probability prob = profile_probability::uninitialized (); + + auto_vec<cluster *> clusters; + clusters.create (m_entries.length ()); + + for (unsigned i = 0; i < m_entries.length (); i++) + { + condition_info *info = m_entries[i]; + for (unsigned j = 0; j < info->m_ranges.length (); j++) + { + range_entry *range = &info->m_ranges[j]; + basic_block bb = info->m_true_edge->dest; + bool has_forwarder = !info->m_true_edge_phi_mapping.is_empty (); + clusters.safe_push (new simple_cluster (range->low, range->high, + NULL_TREE, bb, prob, + has_forwarder)); + } + } + + /* Sort clusters and merge them. */ + auto_vec<cluster *> filtered_clusters; + filtered_clusters.create (16); + clusters.qsort (cluster_cmp); + simple_cluster *left = static_cast<simple_cluster *> (clusters[0]); + filtered_clusters.safe_push (left); + + for (unsigned i = 1; i < clusters.length (); i++) + { + simple_cluster *right = static_cast<simple_cluster *> (clusters[i]); + tree type = TREE_TYPE (left->get_low ()); + tree pos_one = build_int_cst (type, 1); + if (!left->m_has_forward_bb + && !right->m_has_forward_bb + && left->m_case_bb == right->m_case_bb) + { + tree next = int_const_binop (PLUS_EXPR, left->get_high (), pos_one); + if (tree_int_cst_equal (next, right->get_low ())) + { + left->set_high (right->get_high ()); + continue; + } + } + + left = static_cast<simple_cluster *> (clusters[i]); + filtered_clusters.safe_push (left); + } + + dump_clusters (&filtered_clusters, "Canonical GIMPLE case clusters"); + + vec<cluster *> output + = jump_table_cluster::find_jump_tables (filtered_clusters); + bool r = output.length () < filtered_clusters.length (); + if (r) + dump_clusters (&output, "JT can be built"); + output.release (); + if (r) + return true; + + output = bit_test_cluster::find_bit_tests (filtered_clusters); + r = output.length () < filtered_clusters.length (); + if (r) + dump_clusters (&output, "BT can be built"); + output.release (); + return r; +} + +/* Build case label with MIN and MAX values of a given basic block DEST. */ + +static tree +build_case_label (tree index_type, tree min, tree max, basic_block dest) +{ + if (min != NULL_TREE && index_type != TREE_TYPE (min)) + min = fold_convert (index_type, min); + if (max != NULL_TREE && index_type != TREE_TYPE (max)) + max = fold_convert (index_type, max); + + tree label = gimple_block_label (dest); + return build_case_label (min, min == max ? NULL_TREE : max, label); +} + +/* Compare two integer constants. */ + +static int +label_cmp (const void *a, const void *b) +{ + const_tree l1 = *(const const_tree *) a; + const_tree l2 = *(const const_tree *) b; + + return tree_int_cst_compare (CASE_LOW (l1), CASE_LOW (l2)); +} + +/* Convert a given if CHAIN into a switch GIMPLE statement. */ + +static void +convert_if_conditions_to_switch (if_chain *chain) +{ + if (!dbg_cnt (if_to_switch)) + return; + + auto_vec<tree> labels; + unsigned entries = chain->m_entries.length (); + condition_info *first_cond = chain->m_entries[0]; + condition_info *last_cond = chain->m_entries[entries - 1]; + + edge default_edge = last_cond->m_false_edge; + basic_block default_bb = default_edge->dest; + + gimple_stmt_iterator gsi = gsi_for_stmt (first_cond->m_cond); + tree index_type = TREE_TYPE (first_cond->m_ranges[0].exp); + for (unsigned i = 0; i < entries; i++) + { + condition_info *info = chain->m_entries[i]; + basic_block case_bb = info->m_true_edge->dest; + + /* Create a forwarder block if needed. */ + if (!info->m_true_edge_phi_mapping.is_empty ()) + { + info->m_forwarder_bb = split_edge (info->m_true_edge); + case_bb = info->m_forwarder_bb; + } + + for (unsigned j = 0; j < info->m_ranges.length (); j++) + labels.safe_push (build_case_label (index_type, + info->m_ranges[j].low, + info->m_ranges[j].high, + case_bb)); + default_bb = info->m_false_edge->dest; + + if (i == 0) + { + remove_edge (first_cond->m_true_edge); + remove_edge (first_cond->m_false_edge); + } + else + delete_basic_block (info->m_bb); + + make_edge (first_cond->m_bb, case_bb, 0); + } + + labels.qsort (label_cmp); + + edge e = find_edge (first_cond->m_bb, default_bb); + if (e == NULL) + e = make_edge (first_cond->m_bb, default_bb, 0); + gswitch *s + = gimple_build_switch (first_cond->m_ranges[0].exp, + build_case_label (index_type, NULL_TREE, + NULL_TREE, default_bb), + labels); + + gsi_remove (&gsi, true); + gsi_insert_before (&gsi, s, GSI_NEW_STMT); + + if (dump_file) + { + fprintf (dump_file, "Expanded into a new gimple STMT: "); + print_gimple_stmt (dump_file, s, 0, TDF_SLIM); + putc ('\n', dump_file); + } + + /* Fill up missing PHI node arguments. */ + for (unsigned i = 0; i < chain->m_entries.length (); ++i) + { + condition_info *info = chain->m_entries[i]; + for (unsigned j = 0; j < info->m_true_edge_phi_mapping.length (); ++j) + { + std::pair<gphi *, tree> item = info->m_true_edge_phi_mapping[j]; + add_phi_arg (item.first, item.second, + single_succ_edge (info->m_forwarder_bb), + UNKNOWN_LOCATION); + } + } + + /* Fill up missing PHI nodes for the default BB. */ + for (unsigned j = 0; j < last_cond->m_false_edge_phi_mapping.length (); ++j) + { + std::pair<gphi *, tree> item = last_cond->m_false_edge_phi_mapping[j]; + add_phi_arg (item.first, item.second, e, UNKNOWN_LOCATION); + } +} + +/* Identify an index variable used in BB in a GIMPLE condition. + Save information about the condition into CONDITIONS_IN_BBS. */ + +static void +find_conditions (basic_block bb, + hash_map<basic_block, condition_info> *conditions_in_bbs) +{ + gimple_stmt_iterator gsi = gsi_last_nondebug_bb (bb); + if (gsi_end_p (gsi)) + return; + + gcond *cond = dyn_cast<gcond *> (gsi_stmt (gsi)); + if (cond == NULL) + return; + + if (!no_side_effect_bb (bb)) + return; + + tree lhs = gimple_cond_lhs (cond); + tree rhs = gimple_cond_rhs (cond); + tree_code code = gimple_cond_code (cond); + + condition_info info (cond); + + gassign *def; + if (code == NE_EXPR + && TREE_CODE (lhs) == SSA_NAME + && (def = dyn_cast<gassign *> (SSA_NAME_DEF_STMT (lhs))) != NULL + && integer_zerop (rhs)) + { + enum tree_code rhs_code = gimple_assign_rhs_code (def); + if (rhs_code == BIT_IOR_EXPR) + { + info.m_ranges.safe_grow (2, true); + init_range_entry (&info.m_ranges[0], gimple_assign_rhs1 (def), NULL); + init_range_entry (&info.m_ranges[1], gimple_assign_rhs2 (def), NULL); + } + } + else + { + info.m_ranges.safe_grow (1, true); + init_range_entry (&info.m_ranges[0], NULL_TREE, cond); + } + + /* All identified ranges must have equal expression and IN_P flag. */ + if (!info.m_ranges.is_empty ()) + { + edge true_edge, false_edge; + tree expr = info.m_ranges[0].exp; + bool in_p = info.m_ranges[0].in_p; + + extract_true_false_edges_from_block (bb, &true_edge, &false_edge); + info.m_true_edge = in_p ? true_edge : false_edge; + info.m_false_edge = in_p ? false_edge : true_edge; + + for (unsigned i = 0; i < info.m_ranges.length (); ++i) + if (info.m_ranges[i].exp == NULL_TREE + || info.m_ranges[i].low == NULL_TREE + || info.m_ranges[i].high == NULL_TREE) + return; + + for (unsigned i = 1; i < info.m_ranges.length (); ++i) + if (info.m_ranges[i].exp != expr + || info.m_ranges[i].in_p != in_p) + return; + + info.record_phi_mapping (info.m_true_edge, + &info.m_true_edge_phi_mapping); + info.record_phi_mapping (info.m_false_edge, + &info.m_false_edge_phi_mapping); + conditions_in_bbs->put (bb, info); + } + +} + +namespace { + +const pass_data pass_data_if_to_switch = +{ + GIMPLE_PASS, /* type */ + "iftoswitch", /* name */ + OPTGROUP_NONE, /* optinfo_flags */ + TV_TREE_IF_TO_SWITCH, /* tv_id */ + ( PROP_cfg | PROP_ssa ), /* properties_required */ + 0, /* properties_provided */ + 0, /* properties_destroyed */ + 0, /* todo_flags_start */ + TODO_cleanup_cfg | TODO_update_ssa /* todo_flags_finish */ +}; + +class pass_if_to_switch : public gimple_opt_pass +{ +public: + pass_if_to_switch (gcc::context *ctxt) + : gimple_opt_pass (pass_data_if_to_switch, ctxt) + {} + + /* opt_pass methods: */ + virtual bool gate (function *) + { + return (jump_table_cluster::is_enabled () + || bit_test_cluster::is_enabled ()); + } + + virtual unsigned int execute (function *); + +}; // class pass_if_to_switch + +unsigned int +pass_if_to_switch::execute (function *fun) +{ + auto_vec<if_chain *> all_candidates; + hash_map<basic_block, condition_info> conditions_in_bbs; + + basic_block bb; + FOR_EACH_BB_FN (bb, fun) + find_conditions (bb, &conditions_in_bbs); + + int *rpo = XNEWVEC (int, n_basic_blocks_for_fn (fun)); + unsigned n = pre_and_rev_post_order_compute_fn (fun, NULL, rpo, false); + + auto_bitmap seen_bbs; + for (int i = n - 1; i >= 0; --i) + { + basic_block bb = BASIC_BLOCK_FOR_FN (fun, rpo[i]); + if (bitmap_bit_p (seen_bbs, bb->index)) + continue; + + bitmap_set_bit (seen_bbs, bb->index); + condition_info *info = conditions_in_bbs.get (bb); + if (info) + { + if_chain *chain = new if_chain (); + chain->m_entries.safe_push (info); + /* Try to find a chain starting in this BB. */ + while (true) + { + if (!single_pred_p (gimple_bb (info->m_cond))) + break; + edge e = single_pred_edge (gimple_bb (info->m_cond)); + condition_info *info2 = conditions_in_bbs.get (e->src); + if (!info2 || info->m_ranges[0].exp != info2->m_ranges[0].exp) + break; + + chain->m_entries.safe_push (info2); + bitmap_set_bit (seen_bbs, e->src->index); + info = info2; + } + + chain->m_entries.reverse (); + if (chain->m_entries.length () >= 3 + && chain->check_non_overlapping_cases () + && chain->is_beneficial ()) + { + gcond *cond = chain->m_entries[0]->m_cond; + expanded_location loc = expand_location (gimple_location (cond)); + if (dump_file) + { + fprintf (dump_file, "Condition chain (at %s:%d) with %d BBs " + "transformed into a switch statement.\n", + loc.file, loc.line, + chain->m_entries.length ()); + } + all_candidates.safe_push (chain); + } + } + } + + for (unsigned i = 0; i < all_candidates.length (); i++) + { + convert_if_conditions_to_switch (all_candidates[i]); + delete all_candidates[i]; + } + + free (rpo); + free_dominance_info (CDI_DOMINATORS); + + if (!all_candidates.is_empty ()) + mark_virtual_operands_for_renaming (fun); + + return 0; +} + +} // anon namespace + +gimple_opt_pass * +make_pass_if_to_switch (gcc::context *ctxt) +{ + return new pass_if_to_switch (ctxt); +} diff --git a/gcc/passes.def b/gcc/passes.def index fc56e695b60..21b2e2af0f7 100644 --- a/gcc/passes.def +++ b/gcc/passes.def @@ -94,6 +94,7 @@ along with GCC; see the file COPYING3. If not see NEXT_PASS (pass_phiopt, true /* early_p */); NEXT_PASS (pass_modref); NEXT_PASS (pass_tail_recursion); + NEXT_PASS (pass_if_to_switch); NEXT_PASS (pass_convert_switch); NEXT_PASS (pass_cleanup_eh); NEXT_PASS (pass_profile); diff --git a/gcc/testsuite/g++.dg/tree-ssa/if-to-switch-1.C b/gcc/testsuite/g++.dg/tree-ssa/if-to-switch-1.C new file mode 100644 index 00000000000..0f9c8d35ff9 --- /dev/null +++ b/gcc/testsuite/g++.dg/tree-ssa/if-to-switch-1.C @@ -0,0 +1,25 @@ +/* { dg-do compile } */ +/* { dg-options "-O2 -fdump-tree-iftoswitch" } */ + +void fancy_abort(const char *, int, const char *); + +enum machine_mode +{ + MODE_FLOAT, + MODE_DECIMAL_FLOAT, + MODE_COMPLEX_INT, + MODE_COMPLEX_FLOAT, + MODE_VECTOR_BOOL, + MODE_VECTOR_FLOAT +} extern const mode_class; + +void tree_node() { + if (mode_class) + mode_class == MODE_FLOAT || mode_class == MODE_DECIMAL_FLOAT || + mode_class == MODE_COMPLEX_FLOAT || mode_class == MODE_VECTOR_FLOAT + ? fancy_abort("aaa", 2, __FUNCTION__), + 0 : 0; + int g = 0; +} + +/* { dg-final { scan-tree-dump "Condition chain \\(at .*\\) with 3 BBs transformed into a switch statement." "iftoswitch" } } */ diff --git a/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-1.c b/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-1.c new file mode 100644 index 00000000000..94a0db649e4 --- /dev/null +++ b/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-1.c @@ -0,0 +1,35 @@ +/* { dg-do compile } */ +/* { dg-options "-O2 -fdump-tree-iftoswitch" } */ + +int global; +int foo (); + +int main(int argc, char **argv) +{ + if (argc == 1) + foo (); + else if (argc == 2) + { + global += 1; + } + else if (argc == 3) + { + foo (); + foo (); + } + else if (argc == 4) + { + foo (); + } + else if (argc == 5) + { + global = 2; + } + else + global -= 123; + + global -= 12; + return 0; +} + +/* { dg-final { scan-tree-dump "Condition chain \\(at .*if-to-switch-1.c:9\\) with 5 BBs transformed into a switch statement." "iftoswitch" } } */ diff --git a/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-2.c b/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-2.c new file mode 100644 index 00000000000..b114e74ac37 --- /dev/null +++ b/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-2.c @@ -0,0 +1,11 @@ +/* { dg-do compile } */ +/* { dg-options "-O2 -fdump-tree-iftoswitch" } */ + +int IsHTMLWhitespaceNoRange(int aChar) +{ + return aChar == 0x0001 || aChar == 0x000A || + aChar == 0x000C || aChar == 0x000E || + aChar == 0x0020; +} + +/* { dg-final { scan-tree-dump "Condition chain \\(at .*if-to-switch-2.c:7\\) with 3 BBs transformed into a switch statement." "iftoswitch" } } */ diff --git a/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-3.c b/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-3.c new file mode 100644 index 00000000000..e157039e75b --- /dev/null +++ b/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-3.c @@ -0,0 +1,11 @@ +/* { dg-do compile } */ +/* { dg-options "-O2 -fdump-tree-iftoswitch" } */ + +int IsHTMLWhitespace(int aChar) +{ + return aChar == 0x0009 || aChar == 0x000A || + aChar == 0x000C || aChar == 0x000D || + aChar == 0x0020 || aChar == 0x0030; +} + +/* { dg-final { scan-tree-dump "Condition chain \\(at .*if-to-switch-3.c:8\\) with 3 BBs transformed into a switch statement." "iftoswitch" } } */ diff --git a/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-4.c b/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-4.c new file mode 100644 index 00000000000..3ae006f6ca2 --- /dev/null +++ b/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-4.c @@ -0,0 +1,36 @@ +/* { dg-do compile } */ +/* { dg-options "-O2 -fdump-tree-iftoswitch" } */ + +int global; +int foo (); + +int main(int argc, char **argv) +{ + if (argc == 1) + foo (); + else if (argc == 2) + { + global += 1; + } + else if (argc == 3) + { + foo (); + foo (); + } + else if (argc == 4) + { + foo (); + } + /* This will be removed with EVRP. */ + else if (argc == 1) + { + global = 2; + } + else + global -= 123; + + global -= 12; + return 0; +} + +/* { dg-final { scan-tree-dump-not "Condition chain" "iftoswitch" } } */ diff --git a/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-5.c b/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-5.c new file mode 100644 index 00000000000..46ea5b627c8 --- /dev/null +++ b/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-5.c @@ -0,0 +1,12 @@ +/* { dg-do compile } */ +/* { dg-options "-O2 -fdump-tree-iftoswitch" } */ + +int crud (unsigned char c) +{ + return (((((((((((int) c == 46) || (int) c == 44) + || (int) c == 58) || (int) c == 59) || (int) c == 60) + || (int) c == 62) || (int) c == 34) || (int) c == 92) + || (int) c == 39) != 0); +} + +/* { dg-final { scan-tree-dump "Condition chain \\(at .*if-to-switch-5.c:9\\) with 5 BBs transformed into a switch statement." "iftoswitch" } } */ diff --git a/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-6.c b/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-6.c new file mode 100644 index 00000000000..7af323ae251 --- /dev/null +++ b/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-6.c @@ -0,0 +1,42 @@ +/* { dg-do compile } */ +/* { dg-options "-O2 -fdump-tree-iftoswitch" } */ + +int global; +int foo (); + +int main(int argc, char **argv) +{ + if (argc >= 1 && argc <= 10) + foo (); + else if (argc == 12) + { + global += 1; + } + else if (argc == 13) + { + foo (); + foo (); + } + else if (argc == 14) + { + foo (); + } + /* This will be removed with EVRP. */ + else if (argc == 5) + { + global = 2; + } + /* This will be removed with EVRP. */ + else if (argc >= 7 && argc <= 9) + { + global = 2; + } + + else + global -= 123; + + global -= 12; + return 0; +} + +/* { dg-final { scan-tree-dump-not "Condition chain" "iftoswitch" } } */ diff --git a/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-7.c b/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-7.c new file mode 100644 index 00000000000..1a919bf025a --- /dev/null +++ b/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-7.c @@ -0,0 +1,25 @@ +/* { dg-do compile } */ +/* { dg-options "-O2 -fdump-tree-iftoswitch" } */ + +int global; + +int foo(int a) +{ + int x = 0; + for (unsigned i = 0; i < a; i++) + { + if (a == 2) + { + global += 123; + x = 1; + } + else if (a == 3) + x = 2; + else if (a == 10) + x = 3; + } + + return x; +} + +/* { dg-final { scan-tree-dump-not "Condition chain " "iftoswitch" } } */ diff --git a/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-8.c b/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-8.c new file mode 100644 index 00000000000..a5f1a1eae18 --- /dev/null +++ b/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-8.c @@ -0,0 +1,27 @@ +/* { dg-do compile } */ +/* { dg-options "-O2 -fdump-tree-iftoswitch" } */ + +int global; +int global1; +int global2; +int global3; + +int foo(int a, int b) +{ + int x = 0; + for (unsigned i = 0; i < a; i++) + { + if (b == 1) + global += 2; + else if (a == 2) + global = 123; + else if (a == 3) + global1 = 1234; + else if (a == 10) + global2 = 12345; + else if (a == 1) + global2 = 123456; + } +} + +/* { dg-final { scan-tree-dump-not "Condition chain" "iftoswitch" } } */ diff --git a/gcc/testsuite/gcc.dg/tree-ssa/pr96480.c b/gcc/testsuite/gcc.dg/tree-ssa/pr96480.c index f2a91ef9909..cc04721c1df 100644 --- a/gcc/testsuite/gcc.dg/tree-ssa/pr96480.c +++ b/gcc/testsuite/gcc.dg/tree-ssa/pr96480.c @@ -1,6 +1,6 @@ /* PR tree-optimization/96480 */ /* { dg-do compile } */ -/* { dg-options "-O2 -fdump-tree-optimized" } */ +/* { dg-options "-O2 -fdump-tree-optimized -fno-bit-tests" } */ /* { dg-final { scan-tree-dump " = _\[0-9]* <= 3;" "optimized" } } */ int v[4]; diff --git a/gcc/testsuite/gcc.dg/tree-ssa/reassoc-32.c b/gcc/testsuite/gcc.dg/tree-ssa/reassoc-32.c index 944362ad076..093e7a57a27 100644 --- a/gcc/testsuite/gcc.dg/tree-ssa/reassoc-32.c +++ b/gcc/testsuite/gcc.dg/tree-ssa/reassoc-32.c @@ -1,6 +1,6 @@ /* { dg-do run { target { ! "m68k*-*-* mmix*-*-* bfin*-*-* v850*-*-* moxie*-*-* cris*-*-* m32c*-*-* fr30*-*-* mcore*-*-* powerpc*-*-* xtensa*-*-*"} } } */ -/* { dg-options "-O2 -fno-inline -fdump-tree-reassoc1-details --param logical-op-non-short-circuit=1" } */ +/* { dg-options "-O2 -fno-inline -fdump-tree-reassoc1-details --param logical-op-non-short-circuit=1 -fno-bit-tests" } */ /* { dg-additional-options "-mbranch-cost=2" { target branch_cost } } */ diff --git a/gcc/timevar.def b/gcc/timevar.def index a3031799700..1cf2300ecda 100644 --- a/gcc/timevar.def +++ b/gcc/timevar.def @@ -293,6 +293,7 @@ DEFTIMEVAR (TV_VAR_TRACKING , "variable tracking") DEFTIMEVAR (TV_VAR_TRACKING_DATAFLOW , "var-tracking dataflow") DEFTIMEVAR (TV_VAR_TRACKING_EMIT , "var-tracking emit") DEFTIMEVAR (TV_TREE_IFCOMBINE , "tree if-combine") +DEFTIMEVAR (TV_TREE_IF_TO_SWITCH , "if to switch conversion") DEFTIMEVAR (TV_TREE_UNINIT , "uninit var analysis") DEFTIMEVAR (TV_PLUGIN_INIT , "plugin initialization") DEFTIMEVAR (TV_PLUGIN_RUN , "plugin execution") diff --git a/gcc/tree-pass.h b/gcc/tree-pass.h index cc4870e9711..450a379bac7 100644 --- a/gcc/tree-pass.h +++ b/gcc/tree-pass.h @@ -379,6 +379,7 @@ extern gimple_opt_pass *make_pass_empty_loop (gcc::context *ctxt); extern gimple_opt_pass *make_pass_graphite (gcc::context *ctxt); extern gimple_opt_pass *make_pass_graphite_transforms (gcc::context *ctxt); extern gimple_opt_pass *make_pass_if_conversion (gcc::context *ctxt); +extern gimple_opt_pass *make_pass_if_to_switch (gcc::context *ctxt); extern gimple_opt_pass *make_pass_loop_distribution (gcc::context *ctxt); extern gimple_opt_pass *make_pass_vectorize (gcc::context *ctxt); extern gimple_opt_pass *make_pass_simduid_cleanup (gcc::context *ctxt); diff --git a/gcc/tree-ssa-reassoc.c b/gcc/tree-ssa-reassoc.c index 89adafae32c..e594230436d 100644 --- a/gcc/tree-ssa-reassoc.c +++ b/gcc/tree-ssa-reassoc.c @@ -51,6 +51,7 @@ along with GCC; see the file COPYING3. If not see #include "builtins.h" #include "gimplify.h" #include "case-cfn-macros.h" +#include "tree-ssa-reassoc.h" /* This is a simple global reassociation pass. It is, in part, based on the LLVM pass of the same name (They do some things more/less @@ -188,15 +189,6 @@ static struct int pows_created; } reassociate_stats; -/* Operator, rank pair. */ -struct operand_entry -{ - unsigned int rank; - unsigned int id; - tree op; - unsigned int count; - gimple *stmt_to_insert; -}; static object_allocator<operand_entry> operand_entry_pool ("operand entry pool"); @@ -226,7 +218,7 @@ static bool reassoc_stmt_dominates_stmt_p (gimple *, gimple *); /* Wrapper around gsi_remove, which adjusts gimple_uid of debug stmts possibly added by gsi_remove. */ -bool +static bool reassoc_remove_stmt (gimple_stmt_iterator *gsi) { gimple *stmt = gsi_stmt (*gsi); @@ -2408,18 +2400,7 @@ optimize_ops_list (enum tree_code opcode, For more information see comments above fold_test_range in fold-const.c, this implementation is for GIMPLE. */ -struct range_entry -{ - tree exp; - tree low; - tree high; - bool in_p; - bool strict_overflow_p; - unsigned int idx, next; -}; -void dump_range_entry (FILE *file, struct range_entry *r); -void debug_range_entry (struct range_entry *r); /* Dump the range entry R to FILE, skipping its expression if SKIP_EXP. */ @@ -2449,7 +2430,7 @@ debug_range_entry (struct range_entry *r) an SSA_NAME and STMT argument is ignored, otherwise STMT argument should be a GIMPLE_COND. */ -static void +void init_range_entry (struct range_entry *r, tree exp, gimple *stmt) { int in_p; @@ -4286,7 +4267,7 @@ suitable_cond_bb (basic_block bb, basic_block test_bb, basic_block *other_bb, range test optimization, all SSA_NAMEs set in the bb are consumed in the bb and there are no PHIs. */ -static bool +bool no_side_effect_bb (basic_block bb) { gimple_stmt_iterator gsi; diff --git a/gcc/tree-ssa-reassoc.h b/gcc/tree-ssa-reassoc.h new file mode 100644 index 00000000000..dc7f59f1eca --- /dev/null +++ b/gcc/tree-ssa-reassoc.h @@ -0,0 +1,48 @@ +/* Reassociation for trees. + Copyright (C) 2020 Free Software Foundation, Inc. + +This file is part of GCC. + +GCC is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 3, or (at your option) +any later version. + +GCC is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GCC; see the file COPYING3. If not see +<http://www.gnu.org/licenses/>. */ + +#ifndef GCC_SSA_REASSOC_H +#define GCC_SSA_REASSOC_H + +/* Operator, rank pair. */ +struct operand_entry +{ + unsigned int rank; + unsigned int id; + tree op; + unsigned int count; + gimple *stmt_to_insert; +}; + +struct range_entry +{ + tree exp; + tree low; + tree high; + bool in_p; + bool strict_overflow_p; + unsigned int idx, next; +}; + +void dump_range_entry (FILE *file, struct range_entry *r); +void debug_range_entry (struct range_entry *r); +void init_range_entry (struct range_entry *r, tree exp, gimple *stmt); +bool no_side_effect_bb (basic_block bb); + +#endif /* GCC_SSA_REASSOC_H */ diff --git a/gcc/tree-switch-conversion.h b/gcc/tree-switch-conversion.h index 7515e952eb3..62cfde168c8 100644 --- a/gcc/tree-switch-conversion.h +++ b/gcc/tree-switch-conversion.h @@ -48,8 +48,8 @@ class cluster { public: /* Constructor. */ - cluster (tree case_label_expr, basic_block case_bb, profile_probability prob, - profile_probability subtree_prob); + inline cluster (tree case_label_expr, basic_block case_bb, + profile_probability prob, profile_probability subtree_prob); /* Destructor. */ virtual ~cluster () @@ -121,8 +121,9 @@ class simple_cluster: public cluster { public: /* Constructor. */ - simple_cluster (tree low, tree high, tree case_label_expr, - basic_block case_bb, profile_probability prob); + inline simple_cluster (tree low, tree high, tree case_label_expr, + basic_block case_bb, profile_probability prob, + bool has_forward_bb = false); /* Destructor. */ ~simple_cluster () @@ -146,6 +147,11 @@ public: return m_high; } + void set_high (tree high) + { + m_high = high; + } + void debug () { @@ -182,12 +188,16 @@ public: /* True if case is a range. */ bool m_range_p; + + /* True if the case will use a forwarder BB. */ + bool m_has_forward_bb; }; simple_cluster::simple_cluster (tree low, tree high, tree case_label_expr, - basic_block case_bb, profile_probability prob): + basic_block case_bb, profile_probability prob, + bool has_forward_bb): cluster (case_label_expr, case_bb, prob, prob), - m_low (low), m_high (high) + m_low (low), m_high (high), m_has_forward_bb (has_forward_bb) { m_range_p = m_high != NULL; if (m_high == NULL) @@ -271,7 +281,7 @@ public: static inline unsigned int case_values_threshold (void); /* Return whether jump table expansion is allowed. */ - static bool is_enabled (void); + static inline bool is_enabled (void); }; /* A GIMPLE switch statement can be expanded to a short sequence of bit-wise -- 2.29.2 ^ permalink raw reply [flat|nested] 49+ messages in thread
* Re: [PATCH v2] Add if-chain to switch conversion pass. 2020-11-20 8:57 ` Martin Liška @ 2020-11-20 14:37 ` Richard Biener 2020-11-27 15:07 ` Martin Liška 0 siblings, 1 reply; 49+ messages in thread From: Richard Biener @ 2020-11-20 14:37 UTC (permalink / raw) To: Martin Liška; +Cc: David Malcolm, Jakub Jelinek, GCC Patches, Jan Hubicka On Fri, Nov 20, 2020 at 9:57 AM Martin Liška <mliska@suse.cz> wrote: > > On 11/19/20 3:46 PM, Richard Biener wrote: > > OK, so can you send an updated patch? + tree pos_one = build_int_cst (type, 1); + if (!left->m_has_forward_bb + && !right->m_has_forward_bb + && left->m_case_bb == right->m_case_bb) + { + tree next = int_const_binop (PLUS_EXPR, left->get_high (), pos_one); + if (tree_int_cst_equal (next, right->get_low ())) can you please avoid tree arithmetic here and use wide_ints? if (wi::eq (wi::to_wide (right->get_low) - wi::to_wide (left->get_high), wi::one (TYPE_PRECISION (type)) ? + info.record_phi_mapping (info.m_true_edge, + &info.m_true_edge_phi_mapping); + info.record_phi_mapping (info.m_false_edge, + &info.m_false_edge_phi_mapping); you still have this edge mapping stuff, can't you recover the actual PHI arguments from the PHIs during code generation? I see you removed the restriction for all-same values, good. +unsigned int +pass_if_to_switch::execute (function *fun) +{ + auto_vec<if_chain *> all_candidates; + hash_map<basic_block, condition_info> conditions_in_bbs; + + basic_block bb; + FOR_EACH_BB_FN (bb, fun) + find_conditions (bb, &conditions_in_bbs); + if we didn't find any suitable conditions we can early out + free_dominance_info (CDI_DOMINATORS); + + if (!all_candidates.is_empty ()) + mark_virtual_operands_for_renaming (fun); please do not free dominator info when you did nothing (all_candidates.is_empty ()). + gcond *cond = chain->m_entries[0]->m_cond; + expanded_location loc = expand_location (gimple_location (cond)); + if (dump_file) + { + fprintf (dump_file, "Condition chain (at %s:%d) with %d BBs " + "transformed into a switch statement.\n", + loc.file, loc.line, + chain->m_entries.length ()); + } if you use dump_enabled_p () and dump_printf_loc you can use 'cond' as location itself. Otherwise looks OK. Thanks, Richard. > Sure. > > Martin ^ permalink raw reply [flat|nested] 49+ messages in thread
* Re: [PATCH v2] Add if-chain to switch conversion pass. 2020-11-20 14:37 ` Richard Biener @ 2020-11-27 15:07 ` Martin Liška 2020-12-01 10:34 ` Richard Biener 0 siblings, 1 reply; 49+ messages in thread From: Martin Liška @ 2020-11-27 15:07 UTC (permalink / raw) To: Richard Biener; +Cc: David Malcolm, Jakub Jelinek, GCC Patches, Jan Hubicka [-- Attachment #1: Type: text/plain, Size: 2867 bytes --] On 11/20/20 3:37 PM, Richard Biener wrote: > On Fri, Nov 20, 2020 at 9:57 AM Martin Liška <mliska@suse.cz> wrote: >> >> On 11/19/20 3:46 PM, Richard Biener wrote: >>> OK, so can you send an updated patch? > > + tree pos_one = build_int_cst (type, 1); > + if (!left->m_has_forward_bb > + && !right->m_has_forward_bb > + && left->m_case_bb == right->m_case_bb) > + { > + tree next = int_const_binop (PLUS_EXPR, left->get_high (), pos_one); > + if (tree_int_cst_equal (next, right->get_low ())) > > can you please avoid tree arithmetic here and use wide_ints? > > if (wi::eq (wi::to_wide (right->get_low) - wi::to_wide > (left->get_high), wi::one (TYPE_PRECISION (type)) > > ? > > + info.record_phi_mapping (info.m_true_edge, > + &info.m_true_edge_phi_mapping); > + info.record_phi_mapping (info.m_false_edge, > + &info.m_false_edge_phi_mapping); > > you still have this edge mapping stuff, can't you recover the actual > PHI arguments from the PHIs during code generation? I see you removed > the restriction for all-same values, good. > > +unsigned int > +pass_if_to_switch::execute (function *fun) > +{ > + auto_vec<if_chain *> all_candidates; > + hash_map<basic_block, condition_info> conditions_in_bbs; > + > + basic_block bb; > + FOR_EACH_BB_FN (bb, fun) > + find_conditions (bb, &conditions_in_bbs); > + > > if we didn't find any suitable conditions we can early out > > + free_dominance_info (CDI_DOMINATORS); > + > + if (!all_candidates.is_empty ()) > + mark_virtual_operands_for_renaming (fun); > > please do not free dominator info when you did nothing > (all_candidates.is_empty ()). > > + gcond *cond = chain->m_entries[0]->m_cond; > + expanded_location loc = expand_location (gimple_location (cond)); > + if (dump_file) > + { > + fprintf (dump_file, "Condition chain (at %s:%d) with %d BBs " > + "transformed into a switch statement.\n", > + loc.file, loc.line, > + chain->m_entries.length ()); > + } > > if you use dump_enabled_p () and dump_printf_loc you can > use 'cond' as location itself. > > Otherwise looks OK. Hello. I fixed all the notes except the PHI mapping map. It's really not simple to reconstruct PHI nodes during code-gen. Once a BB is removed in transform phase, I would need to investigate which PHIs have "holes" (missing PHI argument). Moreover, I do the very similar thing in gcc/tree-switch-conversion.c::record_phi_operand_mapping. Patch can bootstrap on x86_64-linux-gnu and survives regression tests. And I run SPEC2006 benchmarks, it has done 413 transformations. Martin > > Thanks, > Richard. > >> Sure. >> >> Martin [-- Attachment #2: 0001-Add-if-chain-to-switch-conversion-pass.patch --] [-- Type: text/x-patch, Size: 36502 bytes --] From 9d36dec1109ff9dc6c3a707f976c952c2cd1ddbb Mon Sep 17 00:00:00 2001 From: Martin Liska <mliska@suse.cz> Date: Fri, 28 Aug 2020 10:26:13 +0200 Subject: [PATCH] Add if-chain to switch conversion pass. gcc/ChangeLog: PR tree-optimization/14799 PR ipa/88702 * Makefile.in: Add gimple-if-to-switch.o. * dbgcnt.def (DEBUG_COUNTER): Add new debug counter. * passes.def: Include new pass_if_to_switch pass. * timevar.def (TV_TREE_IF_TO_SWITCH): New timevar. * tree-pass.h (make_pass_if_to_switch): New. * tree-ssa-reassoc.c (struct operand_entry): Move to the header. (dump_range_entry): Move to header file. (debug_range_entry): Likewise. (no_side_effect_bb): Make it global. * tree-switch-conversion.h (simple_cluster::simple_cluster): Add inline for couple of functions in order to prevent error about multiple defined symbols. * gimple-if-to-switch.cc: New file. * tree-ssa-reassoc.h: New file. gcc/testsuite/ChangeLog: PR tree-optimization/14799 PR ipa/88702 * gcc.dg/tree-ssa/pr96480.c: Disable if-to-switch conversion. * gcc.dg/tree-ssa/reassoc-32.c: Likewise. * g++.dg/tree-ssa/if-to-switch-1.C: New test. * gcc.dg/tree-ssa/if-to-switch-1.c: New test. * gcc.dg/tree-ssa/if-to-switch-2.c: New test. * gcc.dg/tree-ssa/if-to-switch-3.c: New test. * gcc.dg/tree-ssa/if-to-switch-4.c: New test. * gcc.dg/tree-ssa/if-to-switch-5.c: New test. * gcc.dg/tree-ssa/if-to-switch-6.c: New test. * gcc.dg/tree-ssa/if-to-switch-7.c: New test. * gcc.dg/tree-ssa/if-to-switch-8.c: New test. --- gcc/Makefile.in | 1 + gcc/dbgcnt.def | 1 + gcc/gimple-if-to-switch.cc | 566 ++++++++++++++++++ gcc/passes.def | 1 + .../g++.dg/tree-ssa/if-to-switch-1.C | 25 + .../gcc.dg/tree-ssa/if-to-switch-1.c | 35 ++ .../gcc.dg/tree-ssa/if-to-switch-2.c | 11 + .../gcc.dg/tree-ssa/if-to-switch-3.c | 11 + .../gcc.dg/tree-ssa/if-to-switch-4.c | 36 ++ .../gcc.dg/tree-ssa/if-to-switch-5.c | 12 + .../gcc.dg/tree-ssa/if-to-switch-6.c | 42 ++ .../gcc.dg/tree-ssa/if-to-switch-7.c | 25 + .../gcc.dg/tree-ssa/if-to-switch-8.c | 27 + gcc/testsuite/gcc.dg/tree-ssa/pr96480.c | 2 +- gcc/testsuite/gcc.dg/tree-ssa/reassoc-32.c | 2 +- gcc/timevar.def | 1 + gcc/tree-pass.h | 1 + gcc/tree-ssa-reassoc.c | 27 +- gcc/tree-ssa-reassoc.h | 48 ++ gcc/tree-switch-conversion.h | 24 +- 20 files changed, 866 insertions(+), 32 deletions(-) create mode 100644 gcc/gimple-if-to-switch.cc create mode 100644 gcc/testsuite/g++.dg/tree-ssa/if-to-switch-1.C create mode 100644 gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-1.c create mode 100644 gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-2.c create mode 100644 gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-3.c create mode 100644 gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-4.c create mode 100644 gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-5.c create mode 100644 gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-6.c create mode 100644 gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-7.c create mode 100644 gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-8.c create mode 100644 gcc/tree-ssa-reassoc.h diff --git a/gcc/Makefile.in b/gcc/Makefile.in index 778ec09c75d..16be66fefc6 100644 --- a/gcc/Makefile.in +++ b/gcc/Makefile.in @@ -1364,6 +1364,7 @@ OBJS = \ gimple-array-bounds.o \ gimple-builder.o \ gimple-expr.o \ + gimple-if-to-switch.o \ gimple-iterator.o \ gimple-fold.o \ gimple-laddress.o \ diff --git a/gcc/dbgcnt.def b/gcc/dbgcnt.def index a5b6bb66a6c..c0744b23f65 100644 --- a/gcc/dbgcnt.def +++ b/gcc/dbgcnt.def @@ -170,6 +170,7 @@ DEBUG_COUNTER (if_after_combine) DEBUG_COUNTER (if_after_reload) DEBUG_COUNTER (if_conversion) DEBUG_COUNTER (if_conversion_tree) +DEBUG_COUNTER (if_to_switch) DEBUG_COUNTER (ipa_cp_bits) DEBUG_COUNTER (ipa_cp_values) DEBUG_COUNTER (ipa_cp_vr) diff --git a/gcc/gimple-if-to-switch.cc b/gcc/gimple-if-to-switch.cc new file mode 100644 index 00000000000..d132064fb9b --- /dev/null +++ b/gcc/gimple-if-to-switch.cc @@ -0,0 +1,566 @@ +/* If-elseif-else to switch conversion pass + Copyright (C) 2020 Free Software Foundation, Inc. + +This file is part of GCC. + +GCC is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 3, or (at your option) +any later version. + +GCC is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GCC; see the file COPYING3. If not see +<http://www.gnu.org/licenses/>. */ + +/* Algorithm of the pass runs in the following steps: + a) We walk basic blocks in DOMINATOR order so that we first reach + a first condition of a future switch. + b) We follow false edges of a if-else-chain and we record chain + of GIMPLE conditions. These blocks are only used for comparison + of a common SSA_NAME and we do not allow any side effect. + c) We remove all basic blocks (except first) of such chain and + GIMPLE switch replaces the condition in the first basic block. + d) We move all GIMPLE statements in the removed blocks into the + first one. */ + +#include "config.h" +#include "system.h" +#include "coretypes.h" +#include "backend.h" +#include "rtl.h" +#include "tree.h" +#include "gimple.h" +#include "tree-pass.h" +#include "ssa.h" +#include "gimple-pretty-print.h" +#include "fold-const.h" +#include "gimple-iterator.h" +#include "tree-cfg.h" +#include "tree-dfa.h" +#include "tree-cfgcleanup.h" +#include "alias.h" +#include "tree-ssa-loop.h" +#include "diagnostic.h" +#include "cfghooks.h" +#include "tree-into-ssa.h" +#include "cfganal.h" +#include "dbgcnt.h" +#include "target.h" +#include "alloc-pool.h" +#include "tree-switch-conversion.h" +#include "tree-ssa-reassoc.h" + +using namespace tree_switch_conversion; + +struct condition_info +{ + typedef vec<std::pair<gphi *, tree>> mapping_vec; + + condition_info (gcond *cond): m_cond (cond), m_bb (gimple_bb (cond)), + m_forwarder_bb (NULL), m_ranges (), m_true_edge (NULL), m_false_edge (NULL), + m_true_edge_phi_mapping (), m_false_edge_phi_mapping () + { + m_ranges.create (0); + } + + /* Recond PHI mapping for an original edge E and save these into + vector VEC. */ + void record_phi_mapping (edge e, mapping_vec *vec); + + gcond *m_cond; + basic_block m_bb; + basic_block m_forwarder_bb; + vec<range_entry> m_ranges; + edge m_true_edge; + edge m_false_edge; + mapping_vec m_true_edge_phi_mapping; + mapping_vec m_false_edge_phi_mapping; +}; + +/* Recond PHI mapping for an original edge E and save these into vector VEC. */ + +void +condition_info::record_phi_mapping (edge e, mapping_vec *vec) +{ + for (gphi_iterator gsi = gsi_start_phis (e->dest); !gsi_end_p (gsi); + gsi_next (&gsi)) + { + gphi *phi = gsi.phi (); + if (!virtual_operand_p (gimple_phi_result (phi))) + { + tree arg = PHI_ARG_DEF_FROM_EDGE (phi, e); + vec->safe_push (std::make_pair (phi, arg)); + } + } +} + +/* Master structure for one if to switch conversion candidate. */ + +struct if_chain +{ + /* Default constructor. */ + if_chain (): m_entries () + { + m_entries.create (2); + } + + /* Default destructor. */ + ~if_chain () + { + m_entries.release (); + } + + /* Verify that all case ranges do not overlap. */ + bool check_non_overlapping_cases (); + + /* Return true when the switch can be expanded with a jump table or + a bit test (at least partially). */ + bool is_beneficial (); + + /* If chain entries. */ + vec<condition_info *> m_entries; +}; + +/* Compare two case ranges by minimum value. */ + +static int +range_cmp (const void *a, const void *b) +{ + const range_entry *re1 = *(const range_entry * const *) a; + const range_entry *re2 = *(const range_entry * const *) b; + + return tree_int_cst_compare (re1->low, re2->low); +} + +/* Verify that all case ranges do not overlap. */ + +bool +if_chain::check_non_overlapping_cases () +{ + auto_vec<range_entry *> all_ranges; + for (unsigned i = 0; i < m_entries.length (); i++) + for (unsigned j = 0; j < m_entries[i]->m_ranges.length (); j++) + all_ranges.safe_push (&m_entries[i]->m_ranges[j]); + + all_ranges.qsort (range_cmp); + + for (unsigned i = 0; i < all_ranges.length () - 1; i++) + { + range_entry *left = all_ranges[i]; + range_entry *right = all_ranges[i + 1]; + if (tree_int_cst_le (left->low, right->low) + && tree_int_cst_le (right->low, left->high)) + return false; + } + + return true; +} + +/* Compare clusters by minimum value. */ + +static int +cluster_cmp (const void *a, const void *b) +{ + simple_cluster *sc1 = *(simple_cluster * const *) a; + simple_cluster *sc2 = *(simple_cluster * const *) b; + + return tree_int_cst_compare (sc1->get_low (), sc2->get_high ()); +} + +/* Dump constructed CLUSTERS with prefix MESSAGE. */ + +static void +dump_clusters (vec<cluster *> *clusters, const char *message) +{ + if (dump_file) + { + fprintf (dump_file, ";; %s: ", message); + for (unsigned i = 0; i < clusters->length (); i++) + (*clusters)[i]->dump (dump_file, dump_flags & TDF_DETAILS); + fprintf (dump_file, "\n"); + } +} + +/* Return true when the switch can be expanded with a jump table or + a bit test (at least partially). */ + +bool +if_chain::is_beneficial () +{ + profile_probability prob = profile_probability::uninitialized (); + + auto_vec<cluster *> clusters; + clusters.create (m_entries.length ()); + + for (unsigned i = 0; i < m_entries.length (); i++) + { + condition_info *info = m_entries[i]; + for (unsigned j = 0; j < info->m_ranges.length (); j++) + { + range_entry *range = &info->m_ranges[j]; + basic_block bb = info->m_true_edge->dest; + bool has_forwarder = !info->m_true_edge_phi_mapping.is_empty (); + clusters.safe_push (new simple_cluster (range->low, range->high, + NULL_TREE, bb, prob, + has_forwarder)); + } + } + + /* Sort clusters and merge them. */ + auto_vec<cluster *> filtered_clusters; + filtered_clusters.create (16); + clusters.qsort (cluster_cmp); + simple_cluster *left = static_cast<simple_cluster *> (clusters[0]); + filtered_clusters.safe_push (left); + + for (unsigned i = 1; i < clusters.length (); i++) + { + simple_cluster *right = static_cast<simple_cluster *> (clusters[i]); + tree type = TREE_TYPE (left->get_low ()); + if (!left->m_has_forward_bb + && !right->m_has_forward_bb + && left->m_case_bb == right->m_case_bb) + { + if (wi::eq_p (wi::to_wide (right->get_low ()) - wi::to_wide + (left->get_high ()), wi::one (TYPE_PRECISION (type)))) + { + left->set_high (right->get_high ()); + continue; + } + } + + left = static_cast<simple_cluster *> (clusters[i]); + filtered_clusters.safe_push (left); + } + + dump_clusters (&filtered_clusters, "Canonical GIMPLE case clusters"); + + vec<cluster *> output + = jump_table_cluster::find_jump_tables (filtered_clusters); + bool r = output.length () < filtered_clusters.length (); + if (r) + dump_clusters (&output, "JT can be built"); + output.release (); + if (r) + return true; + + output = bit_test_cluster::find_bit_tests (filtered_clusters); + r = output.length () < filtered_clusters.length (); + if (r) + dump_clusters (&output, "BT can be built"); + output.release (); + return r; +} + +/* Build case label with MIN and MAX values of a given basic block DEST. */ + +static tree +build_case_label (tree index_type, tree min, tree max, basic_block dest) +{ + if (min != NULL_TREE && index_type != TREE_TYPE (min)) + min = fold_convert (index_type, min); + if (max != NULL_TREE && index_type != TREE_TYPE (max)) + max = fold_convert (index_type, max); + + tree label = gimple_block_label (dest); + return build_case_label (min, min == max ? NULL_TREE : max, label); +} + +/* Compare two integer constants. */ + +static int +label_cmp (const void *a, const void *b) +{ + const_tree l1 = *(const const_tree *) a; + const_tree l2 = *(const const_tree *) b; + + return tree_int_cst_compare (CASE_LOW (l1), CASE_LOW (l2)); +} + +/* Convert a given if CHAIN into a switch GIMPLE statement. */ + +static void +convert_if_conditions_to_switch (if_chain *chain) +{ + if (!dbg_cnt (if_to_switch)) + return; + + auto_vec<tree> labels; + unsigned entries = chain->m_entries.length (); + condition_info *first_cond = chain->m_entries[0]; + condition_info *last_cond = chain->m_entries[entries - 1]; + + edge default_edge = last_cond->m_false_edge; + basic_block default_bb = default_edge->dest; + + gimple_stmt_iterator gsi = gsi_for_stmt (first_cond->m_cond); + tree index_type = TREE_TYPE (first_cond->m_ranges[0].exp); + for (unsigned i = 0; i < entries; i++) + { + condition_info *info = chain->m_entries[i]; + basic_block case_bb = info->m_true_edge->dest; + + /* Create a forwarder block if needed. */ + if (!info->m_true_edge_phi_mapping.is_empty ()) + { + info->m_forwarder_bb = split_edge (info->m_true_edge); + case_bb = info->m_forwarder_bb; + } + + for (unsigned j = 0; j < info->m_ranges.length (); j++) + labels.safe_push (build_case_label (index_type, + info->m_ranges[j].low, + info->m_ranges[j].high, + case_bb)); + default_bb = info->m_false_edge->dest; + + if (i == 0) + { + remove_edge (first_cond->m_true_edge); + remove_edge (first_cond->m_false_edge); + } + else + delete_basic_block (info->m_bb); + + make_edge (first_cond->m_bb, case_bb, 0); + } + + labels.qsort (label_cmp); + + edge e = find_edge (first_cond->m_bb, default_bb); + if (e == NULL) + e = make_edge (first_cond->m_bb, default_bb, 0); + gswitch *s + = gimple_build_switch (first_cond->m_ranges[0].exp, + build_case_label (index_type, NULL_TREE, + NULL_TREE, default_bb), + labels); + + gsi_remove (&gsi, true); + gsi_insert_before (&gsi, s, GSI_NEW_STMT); + + if (dump_file) + { + fprintf (dump_file, "Expanded into a new gimple STMT: "); + print_gimple_stmt (dump_file, s, 0, TDF_SLIM); + putc ('\n', dump_file); + } + + /* Fill up missing PHI node arguments. */ + for (unsigned i = 0; i < chain->m_entries.length (); ++i) + { + condition_info *info = chain->m_entries[i]; + for (unsigned j = 0; j < info->m_true_edge_phi_mapping.length (); ++j) + { + std::pair<gphi *, tree> item = info->m_true_edge_phi_mapping[j]; + add_phi_arg (item.first, item.second, + single_succ_edge (info->m_forwarder_bb), + UNKNOWN_LOCATION); + } + } + + /* Fill up missing PHI nodes for the default BB. */ + for (unsigned j = 0; j < last_cond->m_false_edge_phi_mapping.length (); ++j) + { + std::pair<gphi *, tree> item = last_cond->m_false_edge_phi_mapping[j]; + add_phi_arg (item.first, item.second, e, UNKNOWN_LOCATION); + } +} + +/* Identify an index variable used in BB in a GIMPLE condition. + Save information about the condition into CONDITIONS_IN_BBS. */ + +static void +find_conditions (basic_block bb, + hash_map<basic_block, condition_info> *conditions_in_bbs) +{ + gimple_stmt_iterator gsi = gsi_last_nondebug_bb (bb); + if (gsi_end_p (gsi)) + return; + + gcond *cond = dyn_cast<gcond *> (gsi_stmt (gsi)); + if (cond == NULL) + return; + + if (!no_side_effect_bb (bb)) + return; + + tree lhs = gimple_cond_lhs (cond); + tree rhs = gimple_cond_rhs (cond); + tree_code code = gimple_cond_code (cond); + + condition_info info (cond); + + gassign *def; + if (code == NE_EXPR + && TREE_CODE (lhs) == SSA_NAME + && (def = dyn_cast<gassign *> (SSA_NAME_DEF_STMT (lhs))) != NULL + && integer_zerop (rhs)) + { + enum tree_code rhs_code = gimple_assign_rhs_code (def); + if (rhs_code == BIT_IOR_EXPR) + { + info.m_ranges.safe_grow (2, true); + init_range_entry (&info.m_ranges[0], gimple_assign_rhs1 (def), NULL); + init_range_entry (&info.m_ranges[1], gimple_assign_rhs2 (def), NULL); + } + } + else + { + info.m_ranges.safe_grow (1, true); + init_range_entry (&info.m_ranges[0], NULL_TREE, cond); + } + + /* All identified ranges must have equal expression and IN_P flag. */ + if (!info.m_ranges.is_empty ()) + { + edge true_edge, false_edge; + tree expr = info.m_ranges[0].exp; + bool in_p = info.m_ranges[0].in_p; + + extract_true_false_edges_from_block (bb, &true_edge, &false_edge); + info.m_true_edge = in_p ? true_edge : false_edge; + info.m_false_edge = in_p ? false_edge : true_edge; + + for (unsigned i = 0; i < info.m_ranges.length (); ++i) + if (info.m_ranges[i].exp == NULL_TREE + || info.m_ranges[i].low == NULL_TREE + || info.m_ranges[i].high == NULL_TREE) + return; + + for (unsigned i = 1; i < info.m_ranges.length (); ++i) + if (info.m_ranges[i].exp != expr + || info.m_ranges[i].in_p != in_p) + return; + + info.record_phi_mapping (info.m_true_edge, + &info.m_true_edge_phi_mapping); + info.record_phi_mapping (info.m_false_edge, + &info.m_false_edge_phi_mapping); + conditions_in_bbs->put (bb, info); + } + +} + +namespace { + +const pass_data pass_data_if_to_switch = +{ + GIMPLE_PASS, /* type */ + "iftoswitch", /* name */ + OPTGROUP_NONE, /* optinfo_flags */ + TV_TREE_IF_TO_SWITCH, /* tv_id */ + ( PROP_cfg | PROP_ssa ), /* properties_required */ + 0, /* properties_provided */ + 0, /* properties_destroyed */ + 0, /* todo_flags_start */ + TODO_cleanup_cfg | TODO_update_ssa /* todo_flags_finish */ +}; + +class pass_if_to_switch : public gimple_opt_pass +{ +public: + pass_if_to_switch (gcc::context *ctxt) + : gimple_opt_pass (pass_data_if_to_switch, ctxt) + {} + + /* opt_pass methods: */ + virtual bool gate (function *) + { + return (jump_table_cluster::is_enabled () + || bit_test_cluster::is_enabled ()); + } + + virtual unsigned int execute (function *); + +}; // class pass_if_to_switch + +unsigned int +pass_if_to_switch::execute (function *fun) +{ + auto_vec<if_chain *> all_candidates; + hash_map<basic_block, condition_info> conditions_in_bbs; + + basic_block bb; + FOR_EACH_BB_FN (bb, fun) + find_conditions (bb, &conditions_in_bbs); + + if (conditions_in_bbs.is_empty ()) + return 0; + + int *rpo = XNEWVEC (int, n_basic_blocks_for_fn (fun)); + unsigned n = pre_and_rev_post_order_compute_fn (fun, NULL, rpo, false); + + auto_bitmap seen_bbs; + for (int i = n - 1; i >= 0; --i) + { + basic_block bb = BASIC_BLOCK_FOR_FN (fun, rpo[i]); + if (bitmap_bit_p (seen_bbs, bb->index)) + continue; + + bitmap_set_bit (seen_bbs, bb->index); + condition_info *info = conditions_in_bbs.get (bb); + if (info) + { + if_chain *chain = new if_chain (); + chain->m_entries.safe_push (info); + /* Try to find a chain starting in this BB. */ + while (true) + { + if (!single_pred_p (gimple_bb (info->m_cond))) + break; + edge e = single_pred_edge (gimple_bb (info->m_cond)); + condition_info *info2 = conditions_in_bbs.get (e->src); + if (!info2 || info->m_ranges[0].exp != info2->m_ranges[0].exp) + break; + + chain->m_entries.safe_push (info2); + bitmap_set_bit (seen_bbs, e->src->index); + info = info2; + } + + chain->m_entries.reverse (); + if (chain->m_entries.length () >= 3 + && chain->check_non_overlapping_cases () + && chain->is_beneficial ()) + { + gcond *cond = chain->m_entries[0]->m_cond; + if (dump_enabled_p ()) + dump_printf_loc (MSG_OPTIMIZED_LOCATIONS, cond, + "Condition chain with %d BBs " + "transformed into a switch statement.\n", + chain->m_entries.length ()); + all_candidates.safe_push (chain); + } + } + } + + for (unsigned i = 0; i < all_candidates.length (); i++) + { + convert_if_conditions_to_switch (all_candidates[i]); + delete all_candidates[i]; + } + + free (rpo); + + if (!all_candidates.is_empty ()) + { + free_dominance_info (CDI_DOMINATORS); + mark_virtual_operands_for_renaming (fun); + } + + return 0; +} + +} // anon namespace + +gimple_opt_pass * +make_pass_if_to_switch (gcc::context *ctxt) +{ + return new pass_if_to_switch (ctxt); +} diff --git a/gcc/passes.def b/gcc/passes.def index fc56e695b60..21b2e2af0f7 100644 --- a/gcc/passes.def +++ b/gcc/passes.def @@ -94,6 +94,7 @@ along with GCC; see the file COPYING3. If not see NEXT_PASS (pass_phiopt, true /* early_p */); NEXT_PASS (pass_modref); NEXT_PASS (pass_tail_recursion); + NEXT_PASS (pass_if_to_switch); NEXT_PASS (pass_convert_switch); NEXT_PASS (pass_cleanup_eh); NEXT_PASS (pass_profile); diff --git a/gcc/testsuite/g++.dg/tree-ssa/if-to-switch-1.C b/gcc/testsuite/g++.dg/tree-ssa/if-to-switch-1.C new file mode 100644 index 00000000000..88505e8869f --- /dev/null +++ b/gcc/testsuite/g++.dg/tree-ssa/if-to-switch-1.C @@ -0,0 +1,25 @@ +/* { dg-do compile } */ +/* { dg-options "-O2 -fdump-tree-iftoswitch-optimized" } */ + +void fancy_abort(const char *, int, const char *); + +enum machine_mode +{ + MODE_FLOAT, + MODE_DECIMAL_FLOAT, + MODE_COMPLEX_INT, + MODE_COMPLEX_FLOAT, + MODE_VECTOR_BOOL, + MODE_VECTOR_FLOAT +} extern const mode_class; + +void tree_node() { + if (mode_class) + mode_class == MODE_FLOAT || mode_class == MODE_DECIMAL_FLOAT || + mode_class == MODE_COMPLEX_FLOAT || mode_class == MODE_VECTOR_FLOAT + ? fancy_abort("aaa", 2, __FUNCTION__), + 0 : 0; + int g = 0; +} + +/* { dg-final { scan-tree-dump "Condition chain with 3 BBs transformed into a switch statement." "iftoswitch" } } */ diff --git a/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-1.c b/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-1.c new file mode 100644 index 00000000000..92df4e93bfa --- /dev/null +++ b/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-1.c @@ -0,0 +1,35 @@ +/* { dg-do compile } */ +/* { dg-options "-O2 -fdump-tree-iftoswitch-optimized" } */ + +int global; +int foo (); + +int main(int argc, char **argv) +{ + if (argc == 1) + foo (); + else if (argc == 2) + { + global += 1; + } + else if (argc == 3) + { + foo (); + foo (); + } + else if (argc == 4) + { + foo (); + } + else if (argc == 5) + { + global = 2; + } + else + global -= 123; + + global -= 12; + return 0; +} + +/* { dg-final { scan-tree-dump "Condition chain with 5 BBs transformed into a switch statement." "iftoswitch" } } */ diff --git a/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-2.c b/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-2.c new file mode 100644 index 00000000000..36e62ae5be1 --- /dev/null +++ b/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-2.c @@ -0,0 +1,11 @@ +/* { dg-do compile } */ +/* { dg-options "-O2 -fdump-tree-iftoswitch-optimized" } */ + +int IsHTMLWhitespaceNoRange(int aChar) +{ + return aChar == 0x0001 || aChar == 0x000A || + aChar == 0x000C || aChar == 0x000E || + aChar == 0x0020; +} + +/* { dg-final { scan-tree-dump "Condition chain with 3 BBs transformed into a switch statement." "iftoswitch" } } */ diff --git a/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-3.c b/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-3.c new file mode 100644 index 00000000000..9a4ce160238 --- /dev/null +++ b/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-3.c @@ -0,0 +1,11 @@ +/* { dg-do compile } */ +/* { dg-options "-O2 -fdump-tree-iftoswitch-optimized" } */ + +int IsHTMLWhitespace(int aChar) +{ + return aChar == 0x0009 || aChar == 0x000A || + aChar == 0x000C || aChar == 0x000D || + aChar == 0x0020 || aChar == 0x0030; +} + +/* { dg-final { scan-tree-dump "Condition chain with 3 BBs transformed into a switch statement." "iftoswitch" } } */ diff --git a/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-4.c b/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-4.c new file mode 100644 index 00000000000..6a035883457 --- /dev/null +++ b/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-4.c @@ -0,0 +1,36 @@ +/* { dg-do compile } */ +/* { dg-options "-O2 -fdump-tree-iftoswitch-optimized" } */ + +int global; +int foo (); + +int main(int argc, char **argv) +{ + if (argc == 1) + foo (); + else if (argc == 2) + { + global += 1; + } + else if (argc == 3) + { + foo (); + foo (); + } + else if (argc == 4) + { + foo (); + } + /* This will be removed with EVRP. */ + else if (argc == 1) + { + global = 2; + } + else + global -= 123; + + global -= 12; + return 0; +} + +/* { dg-final { scan-tree-dump-not "Condition chain" "iftoswitch" } } */ diff --git a/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-5.c b/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-5.c new file mode 100644 index 00000000000..7734a58500b --- /dev/null +++ b/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-5.c @@ -0,0 +1,12 @@ +/* { dg-do compile } */ +/* { dg-options "-O2 -fdump-tree-iftoswitch-optimized" } */ + +int crud (unsigned char c) +{ + return (((((((((((int) c == 46) || (int) c == 44) + || (int) c == 58) || (int) c == 59) || (int) c == 60) + || (int) c == 62) || (int) c == 34) || (int) c == 92) + || (int) c == 39) != 0); +} + +/* { dg-final { scan-tree-dump "Condition chain with 5 BBs transformed into a switch statement." "iftoswitch" } } */ diff --git a/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-6.c b/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-6.c new file mode 100644 index 00000000000..464b1fbd124 --- /dev/null +++ b/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-6.c @@ -0,0 +1,42 @@ +/* { dg-do compile } */ +/* { dg-options "-O2 -fdump-tree-iftoswitch-optimized" } */ + +int global; +int foo (); + +int main(int argc, char **argv) +{ + if (argc >= 1 && argc <= 10) + foo (); + else if (argc == 12) + { + global += 1; + } + else if (argc == 13) + { + foo (); + foo (); + } + else if (argc == 14) + { + foo (); + } + /* This will be removed with EVRP. */ + else if (argc == 5) + { + global = 2; + } + /* This will be removed with EVRP. */ + else if (argc >= 7 && argc <= 9) + { + global = 2; + } + + else + global -= 123; + + global -= 12; + return 0; +} + +/* { dg-final { scan-tree-dump-not "Condition chain" "iftoswitch" } } */ diff --git a/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-7.c b/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-7.c new file mode 100644 index 00000000000..4a176f1a613 --- /dev/null +++ b/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-7.c @@ -0,0 +1,25 @@ +/* { dg-do compile } */ +/* { dg-options "-O2 -fdump-tree-iftoswitch-optimized" } */ + +int global; + +int foo(int a) +{ + int x = 0; + for (unsigned i = 0; i < a; i++) + { + if (a == 2) + { + global += 123; + x = 1; + } + else if (a == 3) + x = 2; + else if (a == 10) + x = 3; + } + + return x; +} + +/* { dg-final { scan-tree-dump-not "Condition chain " "iftoswitch" } } */ diff --git a/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-8.c b/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-8.c new file mode 100644 index 00000000000..f43ce7daf78 --- /dev/null +++ b/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-8.c @@ -0,0 +1,27 @@ +/* { dg-do compile } */ +/* { dg-options "-O2 -fdump-tree-iftoswitch-optimized" } */ + +int global; +int global1; +int global2; +int global3; + +int foo(int a, int b) +{ + int x = 0; + for (unsigned i = 0; i < a; i++) + { + if (b == 1) + global += 2; + else if (a == 2) + global = 123; + else if (a == 3) + global1 = 1234; + else if (a == 10) + global2 = 12345; + else if (a == 1) + global2 = 123456; + } +} + +/* { dg-final { scan-tree-dump-not "Condition chain" "iftoswitch" } } */ diff --git a/gcc/testsuite/gcc.dg/tree-ssa/pr96480.c b/gcc/testsuite/gcc.dg/tree-ssa/pr96480.c index f2a91ef9909..cc04721c1df 100644 --- a/gcc/testsuite/gcc.dg/tree-ssa/pr96480.c +++ b/gcc/testsuite/gcc.dg/tree-ssa/pr96480.c @@ -1,6 +1,6 @@ /* PR tree-optimization/96480 */ /* { dg-do compile } */ -/* { dg-options "-O2 -fdump-tree-optimized" } */ +/* { dg-options "-O2 -fdump-tree-optimized -fno-bit-tests" } */ /* { dg-final { scan-tree-dump " = _\[0-9]* <= 3;" "optimized" } } */ int v[4]; diff --git a/gcc/testsuite/gcc.dg/tree-ssa/reassoc-32.c b/gcc/testsuite/gcc.dg/tree-ssa/reassoc-32.c index 944362ad076..093e7a57a27 100644 --- a/gcc/testsuite/gcc.dg/tree-ssa/reassoc-32.c +++ b/gcc/testsuite/gcc.dg/tree-ssa/reassoc-32.c @@ -1,6 +1,6 @@ /* { dg-do run { target { ! "m68k*-*-* mmix*-*-* bfin*-*-* v850*-*-* moxie*-*-* cris*-*-* m32c*-*-* fr30*-*-* mcore*-*-* powerpc*-*-* xtensa*-*-*"} } } */ -/* { dg-options "-O2 -fno-inline -fdump-tree-reassoc1-details --param logical-op-non-short-circuit=1" } */ +/* { dg-options "-O2 -fno-inline -fdump-tree-reassoc1-details --param logical-op-non-short-circuit=1 -fno-bit-tests" } */ /* { dg-additional-options "-mbranch-cost=2" { target branch_cost } } */ diff --git a/gcc/timevar.def b/gcc/timevar.def index a3031799700..1cf2300ecda 100644 --- a/gcc/timevar.def +++ b/gcc/timevar.def @@ -293,6 +293,7 @@ DEFTIMEVAR (TV_VAR_TRACKING , "variable tracking") DEFTIMEVAR (TV_VAR_TRACKING_DATAFLOW , "var-tracking dataflow") DEFTIMEVAR (TV_VAR_TRACKING_EMIT , "var-tracking emit") DEFTIMEVAR (TV_TREE_IFCOMBINE , "tree if-combine") +DEFTIMEVAR (TV_TREE_IF_TO_SWITCH , "if to switch conversion") DEFTIMEVAR (TV_TREE_UNINIT , "uninit var analysis") DEFTIMEVAR (TV_PLUGIN_INIT , "plugin initialization") DEFTIMEVAR (TV_PLUGIN_RUN , "plugin execution") diff --git a/gcc/tree-pass.h b/gcc/tree-pass.h index cc4870e9711..450a379bac7 100644 --- a/gcc/tree-pass.h +++ b/gcc/tree-pass.h @@ -379,6 +379,7 @@ extern gimple_opt_pass *make_pass_empty_loop (gcc::context *ctxt); extern gimple_opt_pass *make_pass_graphite (gcc::context *ctxt); extern gimple_opt_pass *make_pass_graphite_transforms (gcc::context *ctxt); extern gimple_opt_pass *make_pass_if_conversion (gcc::context *ctxt); +extern gimple_opt_pass *make_pass_if_to_switch (gcc::context *ctxt); extern gimple_opt_pass *make_pass_loop_distribution (gcc::context *ctxt); extern gimple_opt_pass *make_pass_vectorize (gcc::context *ctxt); extern gimple_opt_pass *make_pass_simduid_cleanup (gcc::context *ctxt); diff --git a/gcc/tree-ssa-reassoc.c b/gcc/tree-ssa-reassoc.c index 89adafae32c..e594230436d 100644 --- a/gcc/tree-ssa-reassoc.c +++ b/gcc/tree-ssa-reassoc.c @@ -51,6 +51,7 @@ along with GCC; see the file COPYING3. If not see #include "builtins.h" #include "gimplify.h" #include "case-cfn-macros.h" +#include "tree-ssa-reassoc.h" /* This is a simple global reassociation pass. It is, in part, based on the LLVM pass of the same name (They do some things more/less @@ -188,15 +189,6 @@ static struct int pows_created; } reassociate_stats; -/* Operator, rank pair. */ -struct operand_entry -{ - unsigned int rank; - unsigned int id; - tree op; - unsigned int count; - gimple *stmt_to_insert; -}; static object_allocator<operand_entry> operand_entry_pool ("operand entry pool"); @@ -226,7 +218,7 @@ static bool reassoc_stmt_dominates_stmt_p (gimple *, gimple *); /* Wrapper around gsi_remove, which adjusts gimple_uid of debug stmts possibly added by gsi_remove. */ -bool +static bool reassoc_remove_stmt (gimple_stmt_iterator *gsi) { gimple *stmt = gsi_stmt (*gsi); @@ -2408,18 +2400,7 @@ optimize_ops_list (enum tree_code opcode, For more information see comments above fold_test_range in fold-const.c, this implementation is for GIMPLE. */ -struct range_entry -{ - tree exp; - tree low; - tree high; - bool in_p; - bool strict_overflow_p; - unsigned int idx, next; -}; -void dump_range_entry (FILE *file, struct range_entry *r); -void debug_range_entry (struct range_entry *r); /* Dump the range entry R to FILE, skipping its expression if SKIP_EXP. */ @@ -2449,7 +2430,7 @@ debug_range_entry (struct range_entry *r) an SSA_NAME and STMT argument is ignored, otherwise STMT argument should be a GIMPLE_COND. */ -static void +void init_range_entry (struct range_entry *r, tree exp, gimple *stmt) { int in_p; @@ -4286,7 +4267,7 @@ suitable_cond_bb (basic_block bb, basic_block test_bb, basic_block *other_bb, range test optimization, all SSA_NAMEs set in the bb are consumed in the bb and there are no PHIs. */ -static bool +bool no_side_effect_bb (basic_block bb) { gimple_stmt_iterator gsi; diff --git a/gcc/tree-ssa-reassoc.h b/gcc/tree-ssa-reassoc.h new file mode 100644 index 00000000000..dc7f59f1eca --- /dev/null +++ b/gcc/tree-ssa-reassoc.h @@ -0,0 +1,48 @@ +/* Reassociation for trees. + Copyright (C) 2020 Free Software Foundation, Inc. + +This file is part of GCC. + +GCC is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 3, or (at your option) +any later version. + +GCC is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GCC; see the file COPYING3. If not see +<http://www.gnu.org/licenses/>. */ + +#ifndef GCC_SSA_REASSOC_H +#define GCC_SSA_REASSOC_H + +/* Operator, rank pair. */ +struct operand_entry +{ + unsigned int rank; + unsigned int id; + tree op; + unsigned int count; + gimple *stmt_to_insert; +}; + +struct range_entry +{ + tree exp; + tree low; + tree high; + bool in_p; + bool strict_overflow_p; + unsigned int idx, next; +}; + +void dump_range_entry (FILE *file, struct range_entry *r); +void debug_range_entry (struct range_entry *r); +void init_range_entry (struct range_entry *r, tree exp, gimple *stmt); +bool no_side_effect_bb (basic_block bb); + +#endif /* GCC_SSA_REASSOC_H */ diff --git a/gcc/tree-switch-conversion.h b/gcc/tree-switch-conversion.h index 7515e952eb3..62cfde168c8 100644 --- a/gcc/tree-switch-conversion.h +++ b/gcc/tree-switch-conversion.h @@ -48,8 +48,8 @@ class cluster { public: /* Constructor. */ - cluster (tree case_label_expr, basic_block case_bb, profile_probability prob, - profile_probability subtree_prob); + inline cluster (tree case_label_expr, basic_block case_bb, + profile_probability prob, profile_probability subtree_prob); /* Destructor. */ virtual ~cluster () @@ -121,8 +121,9 @@ class simple_cluster: public cluster { public: /* Constructor. */ - simple_cluster (tree low, tree high, tree case_label_expr, - basic_block case_bb, profile_probability prob); + inline simple_cluster (tree low, tree high, tree case_label_expr, + basic_block case_bb, profile_probability prob, + bool has_forward_bb = false); /* Destructor. */ ~simple_cluster () @@ -146,6 +147,11 @@ public: return m_high; } + void set_high (tree high) + { + m_high = high; + } + void debug () { @@ -182,12 +188,16 @@ public: /* True if case is a range. */ bool m_range_p; + + /* True if the case will use a forwarder BB. */ + bool m_has_forward_bb; }; simple_cluster::simple_cluster (tree low, tree high, tree case_label_expr, - basic_block case_bb, profile_probability prob): + basic_block case_bb, profile_probability prob, + bool has_forward_bb): cluster (case_label_expr, case_bb, prob, prob), - m_low (low), m_high (high) + m_low (low), m_high (high), m_has_forward_bb (has_forward_bb) { m_range_p = m_high != NULL; if (m_high == NULL) @@ -271,7 +281,7 @@ public: static inline unsigned int case_values_threshold (void); /* Return whether jump table expansion is allowed. */ - static bool is_enabled (void); + static inline bool is_enabled (void); }; /* A GIMPLE switch statement can be expanded to a short sequence of bit-wise -- 2.29.2 ^ permalink raw reply [flat|nested] 49+ messages in thread
* Re: [PATCH v2] Add if-chain to switch conversion pass. 2020-11-27 15:07 ` Martin Liška @ 2020-12-01 10:34 ` Richard Biener 2020-12-01 13:57 ` [PATCH] if-to-switch: Support chain with 2 BBs Martin Liška 0 siblings, 1 reply; 49+ messages in thread From: Richard Biener @ 2020-12-01 10:34 UTC (permalink / raw) To: Martin Liška; +Cc: David Malcolm, Jakub Jelinek, GCC Patches, Jan Hubicka On Fri, Nov 27, 2020 at 4:07 PM Martin Liška <mliska@suse.cz> wrote: > > On 11/20/20 3:37 PM, Richard Biener wrote: > > On Fri, Nov 20, 2020 at 9:57 AM Martin Liška <mliska@suse.cz> wrote: > >> > >> On 11/19/20 3:46 PM, Richard Biener wrote: > >>> OK, so can you send an updated patch? > > > > + tree pos_one = build_int_cst (type, 1); > > + if (!left->m_has_forward_bb > > + && !right->m_has_forward_bb > > + && left->m_case_bb == right->m_case_bb) > > + { > > + tree next = int_const_binop (PLUS_EXPR, left->get_high (), pos_one); > > + if (tree_int_cst_equal (next, right->get_low ())) > > > > can you please avoid tree arithmetic here and use wide_ints? > > > > if (wi::eq (wi::to_wide (right->get_low) - wi::to_wide > > (left->get_high), wi::one (TYPE_PRECISION (type)) > > > > ? > > > > + info.record_phi_mapping (info.m_true_edge, > > + &info.m_true_edge_phi_mapping); > > + info.record_phi_mapping (info.m_false_edge, > > + &info.m_false_edge_phi_mapping); > > > > you still have this edge mapping stuff, can't you recover the actual > > PHI arguments from the PHIs during code generation? I see you removed > > the restriction for all-same values, good. > > > > +unsigned int > > +pass_if_to_switch::execute (function *fun) > > +{ > > + auto_vec<if_chain *> all_candidates; > > + hash_map<basic_block, condition_info> conditions_in_bbs; > > + > > + basic_block bb; > > + FOR_EACH_BB_FN (bb, fun) > > + find_conditions (bb, &conditions_in_bbs); > > + > > > > if we didn't find any suitable conditions we can early out > > > > + free_dominance_info (CDI_DOMINATORS); > > + > > + if (!all_candidates.is_empty ()) > > + mark_virtual_operands_for_renaming (fun); > > > > please do not free dominator info when you did nothing > > (all_candidates.is_empty ()). > > > > + gcond *cond = chain->m_entries[0]->m_cond; > > + expanded_location loc = expand_location (gimple_location (cond)); > > + if (dump_file) > > + { > > + fprintf (dump_file, "Condition chain (at %s:%d) with %d BBs " > > + "transformed into a switch statement.\n", > > + loc.file, loc.line, > > + chain->m_entries.length ()); > > + } > > > > if you use dump_enabled_p () and dump_printf_loc you can > > use 'cond' as location itself. > > > > Otherwise looks OK. > > Hello. > > I fixed all the notes except the PHI mapping map. It's really not simple > to reconstruct PHI nodes during code-gen. Once a BB is removed in transform phase, > I would need to investigate which PHIs have "holes" (missing PHI argument). > > Moreover, I do the very similar thing in gcc/tree-switch-conversion.c::record_phi_operand_mapping. > > Patch can bootstrap on x86_64-linux-gnu and survives regression tests. > And I run SPEC2006 benchmarks, it has done 413 transformations. OK. Thanks, Richard. > Martin > > > > > Thanks, > > Richard. > > > >> Sure. > >> > >> Martin > ^ permalink raw reply [flat|nested] 49+ messages in thread
* [PATCH] if-to-switch: Support chain with 2 BBs. 2020-12-01 10:34 ` Richard Biener @ 2020-12-01 13:57 ` Martin Liška 2020-12-01 22:14 ` Jeff Law 0 siblings, 1 reply; 49+ messages in thread From: Martin Liška @ 2020-12-01 13:57 UTC (permalink / raw) To: Richard Biener; +Cc: David Malcolm, Jakub Jelinek, GCC Patches, Jan Hubicka [-- Attachment #1: Type: text/plain, Size: 340 bytes --] Hello. The following patch is a small tweak than enables more opportunities. It fixes bug in PR88702 and I see 54 transformations to happen in SPEC 2006. Apart from that, I fixed a minor issues which I spotted during bootstrap. Patch can bootstrap on x86_64-linux-gnu and survives regression tests. Ready to be installed? Thanks, Martin [-- Attachment #2: 0001-if-to-switch-Support-chain-with-2-BBs.patch --] [-- Type: text/x-patch, Size: 2574 bytes --] From a27dca2d5ef87b493d1ab50da68d0b24dc9fdd93 Mon Sep 17 00:00:00 2001 From: Martin Liska <mliska@suse.cz> Date: Tue, 1 Dec 2020 12:18:46 +0100 Subject: [PATCH] if-to-switch: Support chain with 2 BBs. As seen in the test-case, even 2 BBs can handle interesting cases covered by a jump table or a bit-test. gcc/ChangeLog: PR tree-optimization/88702 * gimple-if-to-switch.cc (pass_if_to_switch::execute): Require at least 2 BBs. * gimple-if-to-switch.cc (find_conditions): Require equal precision for low and high of a range. gcc/testsuite/ChangeLog: PR tree-optimization/88702 * gcc.dg/tree-ssa/if-to-switch-9.c: New test. --- gcc/gimple-if-to-switch.cc | 6 ++++-- gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-9.c | 11 +++++++++++ 2 files changed, 15 insertions(+), 2 deletions(-) create mode 100644 gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-9.c diff --git a/gcc/gimple-if-to-switch.cc b/gcc/gimple-if-to-switch.cc index d132064fb9b..19ec6318229 100644 --- a/gcc/gimple-if-to-switch.cc +++ b/gcc/gimple-if-to-switch.cc @@ -430,7 +430,9 @@ find_conditions (basic_block bb, for (unsigned i = 0; i < info.m_ranges.length (); ++i) if (info.m_ranges[i].exp == NULL_TREE || info.m_ranges[i].low == NULL_TREE - || info.m_ranges[i].high == NULL_TREE) + || info.m_ranges[i].high == NULL_TREE + || (TYPE_PRECISION (TREE_TYPE (info.m_ranges[i].low)) + != TYPE_PRECISION (TREE_TYPE (info.m_ranges[i].high)))) return; for (unsigned i = 1; i < info.m_ranges.length (); ++i) @@ -525,7 +527,7 @@ pass_if_to_switch::execute (function *fun) } chain->m_entries.reverse (); - if (chain->m_entries.length () >= 3 + if (chain->m_entries.length () >= 2 && chain->check_non_overlapping_cases () && chain->is_beneficial ()) { diff --git a/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-9.c b/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-9.c new file mode 100644 index 00000000000..d0e9df75f55 --- /dev/null +++ b/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-9.c @@ -0,0 +1,11 @@ +/* PR tree-optimization/88702 */ +/* { dg-do compile } */ +/* { dg-options "-O2 -fdump-tree-iftoswitch-optimized" } */ + +int IsHTMLWhitespace(int aChar) { + return aChar == 0x0009 || aChar == 0x000A || + aChar == 0x000C || aChar == 0x000D || + aChar == 0x0020; +} + +/* { dg-final { scan-tree-dump "Condition chain with 2 BBs transformed into a switch statement." "iftoswitch" } } */ -- 2.29.2 ^ permalink raw reply [flat|nested] 49+ messages in thread
* Re: [PATCH] if-to-switch: Support chain with 2 BBs. 2020-12-01 13:57 ` [PATCH] if-to-switch: Support chain with 2 BBs Martin Liška @ 2020-12-01 22:14 ` Jeff Law 0 siblings, 0 replies; 49+ messages in thread From: Jeff Law @ 2020-12-01 22:14 UTC (permalink / raw) To: Martin Liška, Richard Biener; +Cc: Jakub Jelinek, GCC Patches, Jan Hubicka On 12/1/20 6:57 AM, Martin Liška wrote: > Hello. > > The following patch is a small tweak than enables more opportunities. > It fixes bug in PR88702 and I see 54 transformations to happen in SPEC > 2006. > Apart from that, I fixed a minor issues which I spotted during bootstrap. > > Patch can bootstrap on x86_64-linux-gnu and survives regression tests. > > Ready to be installed? > Thanks, > Martin > > 0001-if-to-switch-Support-chain-with-2-BBs.patch > > From a27dca2d5ef87b493d1ab50da68d0b24dc9fdd93 Mon Sep 17 00:00:00 2001 > From: Martin Liska <mliska@suse.cz> > Date: Tue, 1 Dec 2020 12:18:46 +0100 > Subject: [PATCH] if-to-switch: Support chain with 2 BBs. > > As seen in the test-case, even 2 BBs can handle interesting > cases covered by a jump table or a bit-test. > > gcc/ChangeLog: > > PR tree-optimization/88702 > * gimple-if-to-switch.cc (pass_if_to_switch::execute): > Require at least 2 BBs. > * gimple-if-to-switch.cc (find_conditions): Require > equal precision for low and high of a range. > > gcc/testsuite/ChangeLog: > > PR tree-optimization/88702 > * gcc.dg/tree-ssa/if-to-switch-9.c: New test. OK jeff ^ permalink raw reply [flat|nested] 49+ messages in thread
* Re: [PATCH] Add if-chain to switch conversion pass. 2019-11-04 14:49 ` Jakub Jelinek 2019-11-05 12:38 ` Richard Biener @ 2019-11-13 11:32 ` Martin Liška 2019-11-13 16:14 ` Michael Matz 1 sibling, 1 reply; 49+ messages in thread From: Martin Liška @ 2019-11-13 11:32 UTC (permalink / raw) To: Jakub Jelinek; +Cc: gcc-patches, kazu, Jan Hubicka On 11/4/19 3:48 PM, Jakub Jelinek wrote: > On Mon, Nov 04, 2019 at 03:23:20PM +0100, Martin LiÅ¡ka wrote: >> The patch adds a new pass that identifies a series of if-elseif >> statements and transform then into a GIMPLE switch (if possible). >> The pass runs right after tree-ssa pass and I decided to implement >> matching of various forms that are introduced by folder (fold_range_test): > > Not a review, just a few questions: Hello. Thank you for it. > > 1) what does it do if __builtin_expect* has been used, does it preserve > the probabilities and if in the end decides to expand as ifs, are those > probabilities retained through it? No, it's currently not supported. I can consider adding that as a follow up. > 2) for the reassoc-*.c testcases, do you get identical or better code > with the patch? The code is the following: Before: Optimizing range tests a_5(D) -[10, 10] and -[26, 26] into (a_5(D) & -17) != 10 <bb 2> [local count: 1073741823]: _11 = a_5(D) & -17; _12 = _11 == 10; _1 = a_5(D) == 10; _2 = a_5(D) == 12; _10 = a_5(D) == 26; _9 = _2 | _12; if (_9 != 0) goto <bb 4>; [56.44%] else goto <bb 3>; [43.56%] After: <bb 2> [local count: 1073741824]: switch (a_2(D)) <default: <L5> [50.00%], case 10: <L6> [50.00%], case 12: <L6> [50.00%], case 26: <L6> [50.00%]> As seen, reassoc can generate a different range check and then it's about cmp1 | cmp2 | .. I bet the explicit gswitch is quite equal representation. > 3) shouldn't it be gimple-if-to-switch.c instead? Yes, I renamed that. > 4) what code size effect does the patch have say on cc1plus (if you don't > count the code changes of the patch itself, i.e. revert the patch in the > stage3 and rebuild just the stage3)? I've just measures that and it's about: VM SIZE FILE SIZE ++++++++++++++ GROWING ++++++++++++++ +0.3% +24.8Ki .rodata +24.8Ki +0.3% [ = ] 0 .debug_loc +17.4Ki +0.0% [ = ] 0 .debug_line +8.77Ki +0.0% +0.0% +2.52Ki .text +2.52Ki +0.0% +0.1% +1.66Ki .eh_frame +1.66Ki +0.1% [ = ] 0 .symtab +216 +0.0% [ = ] 0 .debug_abbrev +32 +0.0% +0.0% +16 .eh_frame_hdr +16 +0.0% +0.1% +29.0Ki TOTAL +44.7Ki +0.0% Martin > >> +struct case_range >> +{ >> + /* Default constructor. */ >> + case_range (): >> + m_min (NULL_TREE), m_max (NULL_TREE) > > I admit I'm never sure about coding conventions for C++, > but shouldn't there be a space before :, or even better : > be on the next line before m_min ? > > Jakub > ^ permalink raw reply [flat|nested] 49+ messages in thread
* Re: [PATCH] Add if-chain to switch conversion pass. 2019-11-13 11:32 ` [PATCH] Add if-chain to switch conversion pass Martin Liška @ 2019-11-13 16:14 ` Michael Matz 2019-11-14 10:07 ` Martin Liška 0 siblings, 1 reply; 49+ messages in thread From: Michael Matz @ 2019-11-13 16:14 UTC (permalink / raw) To: Martin Liška; +Cc: Jakub Jelinek, gcc-patches, kazu, Jan Hubicka [-- Attachment #1: Type: text/plain, Size: 1867 bytes --] Hi, On Wed, 13 Nov 2019, Martin LiÅ¡ka wrote: > > Not a review, just a few questions: > > Hello. > > Thank you for it. > > > > > 1) what does it do if __builtin_expect* has been used, does it preserve > > the probabilities and if in the end decides to expand as ifs, are those > > probabilities retained through it? > > No, it's currently not supported. I can consider adding that as a follow up. But given that you apply the transformation even to small if ladders this looses quite some info then. > > 2) for the reassoc-*.c testcases, do you get identical or better code > > with the patch? > > The code is the following: > > Before: > Optimizing range tests a_5(D) -[10, 10] and -[26, 26] > into (a_5(D) & -17) != 10 > > <bb 2> [local count: 1073741823]: > _11 = a_5(D) & -17; > _12 = _11 == 10; > _1 = a_5(D) == 10; > _2 = a_5(D) == 12; > _10 = a_5(D) == 26; > _9 = _2 | _12; > if (_9 != 0) > goto <bb 4>; [56.44%] > else > goto <bb 3>; [43.56%] > > After: > > <bb 2> [local count: 1073741824]: > switch (a_2(D)) <default: <L5> [50.00%], case 10: <L6> [50.00%], case 12: > <L6> [50.00%], case 26: <L6> [50.00%]> And here I bet that Jakub was asking for final code, not intermediate code. In particular the bit trick with transforming a test for a \in {10,26} into (a&-17)==10. The switch still tests for 10,26, and in the end it should be ensured that the same trickery is employed to actually implement the switch. > As seen, reassoc can generate a different range check and then it's about cmp1 > | cmp2 | .. > I bet the explicit gswitch is quite equal representation. As long as the final code is the same or better, sure. Otherwise it's a more canonical representation with suboptimal expansion, and the latter should be fixed otherwise it's introducing a regression. Ciao, Michael. ^ permalink raw reply [flat|nested] 49+ messages in thread
* Re: [PATCH] Add if-chain to switch conversion pass. 2019-11-13 16:14 ` Michael Matz @ 2019-11-14 10:07 ` Martin Liška 0 siblings, 0 replies; 49+ messages in thread From: Martin Liška @ 2019-11-14 10:07 UTC (permalink / raw) To: Michael Matz; +Cc: Jakub Jelinek, gcc-patches, kazu, Jan Hubicka On 11/13/19 4:43 PM, Michael Matz wrote: > Hi, > > On Wed, 13 Nov 2019, Martin LiÅ¡ka wrote: > >>> Not a review, just a few questions: >> >> Hello. >> >> Thank you for it. >> >>> >>> 1) what does it do if __builtin_expect* has been used, does it preserve >>> the probabilities and if in the end decides to expand as ifs, are those >>> probabilities retained through it? >> >> No, it's currently not supported. I can consider adding that as a follow up. > > But given that you apply the transformation even to small if ladders this > looses quite some info then. Yes. Based on my experiments, the patch does not convert if-else chain with __builtin_expect* right now. > >>> 2) for the reassoc-*.c testcases, do you get identical or better code >>> with the patch? >> >> The code is the following: >> >> Before: >> Optimizing range tests a_5(D) -[10, 10] and -[26, 26] >> into (a_5(D) & -17) != 10 >> >> <bb 2> [local count: 1073741823]: >> _11 = a_5(D) & -17; >> _12 = _11 == 10; >> _1 = a_5(D) == 10; >> _2 = a_5(D) == 12; >> _10 = a_5(D) == 26; >> _9 = _2 | _12; >> if (_9 != 0) >> goto <bb 4>; [56.44%] >> else >> goto <bb 3>; [43.56%] >> >> After: >> >> <bb 2> [local count: 1073741824]: >> switch (a_2(D)) <default: <L5> [50.00%], case 10: <L6> [50.00%], case 12: >> <L6> [50.00%], case 26: <L6> [50.00%]> > > And here I bet that Jakub was asking for final code, not intermediate > code. In particular the bit trick with transforming a test for > a \in {10,26} into (a&-17)==10. The switch still tests for 10,26, and in > the end it should be ensured that the same trickery is employed to > actually implement the switch. I agree that (a&-17)==10 is more elegant trick here ... > >> As seen, reassoc can generate a different range check and then it's about cmp1 >> | cmp2 | .. >> I bet the explicit gswitch is quite equal representation. > > As long as the final code is the same or better, sure. Otherwise it's a > more canonical representation with suboptimal expansion, and the latter > should be fixed otherwise it's introducing a regression. ... and yes, the gswitch expansion is not capable of such smart interval tests. We can improve that in the future. Martin > > > Ciao, > Michael. > ^ permalink raw reply [flat|nested] 49+ messages in thread
end of thread, other threads:[~2020-12-01 22:14 UTC | newest] Thread overview: 49+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2019-11-04 14:23 [PATCH] Add if-chain to switch conversion pass Martin Liška 2019-11-04 14:49 ` Jakub Jelinek 2019-11-05 12:38 ` Richard Biener 2019-11-06 21:03 ` Bernhard Reutner-Fischer 2019-11-14 9:44 ` Martin Liška 2019-11-14 12:35 ` Bernhard Reutner-Fischer 2019-11-14 9:41 ` Martin Liška 2019-11-14 10:48 ` Richard Biener 2019-11-15 13:56 ` Martin Liška 2020-09-01 11:47 ` Martin Liška 2020-09-01 14:50 ` David Malcolm 2020-09-02 11:53 ` Martin Liška 2020-09-21 8:55 ` Martin Liška 2020-09-24 12:41 ` Richard Biener 2020-09-25 14:05 ` Martin Liška 2020-09-29 8:46 ` Richard Biener 2020-10-02 13:26 ` Martin Liška 2020-10-02 14:19 ` Andrew MacLeod 2020-10-06 12:09 ` Martin Liška 2020-10-06 12:56 ` Andrew MacLeod 2020-10-06 13:09 ` Martin Liška 2020-10-06 13:23 ` Andrew MacLeod 2020-10-06 13:41 ` Richard Biener 2020-10-02 13:23 ` Martin Liška 2020-10-06 7:47 ` Richard Biener 2020-10-06 13:48 ` Martin Liška 2020-10-06 14:12 ` Jakub Jelinek 2020-10-12 12:39 ` Martin Liška 2020-10-12 13:00 ` Jakub Jelinek 2020-10-14 18:09 ` Andrew MacLeod 2020-10-07 8:00 ` Richard Biener 2020-10-12 12:44 ` Martin Liška 2020-10-12 13:01 ` Martin Liška 2020-10-15 12:38 ` Richard Biener 2020-10-16 14:04 ` [PATCH v2] " Martin Liška 2020-11-06 12:31 ` Richard Biener 2020-11-09 12:26 ` Martin Liška 2020-11-16 12:21 ` Richard Biener 2020-11-18 12:25 ` Martin Liška 2020-11-19 14:46 ` Richard Biener 2020-11-20 8:57 ` Martin Liška 2020-11-20 14:37 ` Richard Biener 2020-11-27 15:07 ` Martin Liška 2020-12-01 10:34 ` Richard Biener 2020-12-01 13:57 ` [PATCH] if-to-switch: Support chain with 2 BBs Martin Liška 2020-12-01 22:14 ` Jeff Law 2019-11-13 11:32 ` [PATCH] Add if-chain to switch conversion pass Martin Liška 2019-11-13 16:14 ` Michael Matz 2019-11-14 10:07 ` Martin Liška
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