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* [gcc r14-5628] inter-procedural value range propagation
@ 2023-11-20 18:38 Jan Hubicka
0 siblings, 0 replies; only message in thread
From: Jan Hubicka @ 2023-11-20 18:38 UTC (permalink / raw)
To: gcc-cvs
https://gcc.gnu.org/g:53ba8d669550d3a1f809048428b97ca607f95cf5
commit r14-5628-g53ba8d669550d3a1f809048428b97ca607f95cf5
Author: Jan Hubicka <jh@suse.cz>
Date: Mon Nov 20 19:35:53 2023 +0100
inter-procedural value range propagation
implement very basic propapgation of return value ranges from VRP
pass. This helps std::vector's push_back since we work out value range of
allocated block. This propagates only within single translation unit. I hoped
we will also do the propagation at WPA stage, but that needs more work on
ipa-cp side.
I also added code auto-detecting return_nonnull and corresponding -Wsuggest-attribute.
gcc/ChangeLog:
* cgraph.cc (add_detected_attribute_1): New function.
(cgraph_node::add_detected_attribute): Likewise.
* cgraph.h (cgraph_node::add_detected_attribute): Declare.
* common.opt: Add -Wsuggest-attribute=returns_nonnull.
* doc/invoke.texi: Document new flag.
* gimple-range-fold.cc (fold_using_range::range_of_call):
Use known reutrn value ranges.
* ipa-prop.cc (struct ipa_return_value_summary): New type.
(class ipa_return_value_sum_t): New type.
(ipa_return_value_sum): New summary.
(ipa_record_return_value_range): New function.
(ipa_return_value_range): New function.
* ipa-prop.h (ipa_return_value_range): Declare.
(ipa_record_return_value_range): Declare.
* ipa-pure-const.cc (warn_function_returns_nonnull): New funcion.
* ipa-utils.h (warn_function_returns_nonnull): Declare.
* symbol-summary.h: Fix comment.
* tree-vrp.cc (execute_ranger_vrp): Record return values.
gcc/testsuite/ChangeLog:
* g++.dg/ipa/devirt-2.C: Add noipa attribute to prevent ipa-vrp.
* g++.dg/ipa/devirt-7.C: Disable ipa-vrp.
* g++.dg/ipa/ipa-icf-2.C: Disable ipa-vrp.
* g++.dg/ipa/ipa-icf-3.C: Disable ipa-vrp.
* g++.dg/ipa/ivinline-1.C: Disable ipa-vrp.
* g++.dg/ipa/ivinline-3.C: Disable ipa-vrp.
* g++.dg/ipa/ivinline-5.C: Disable ipa-vrp.
* g++.dg/ipa/ivinline-8.C: Disable ipa-vrp.
* g++.dg/ipa/nothrow-1.C: Disable ipa-vrp.
* g++.dg/ipa/pure-const-1.C: Disable ipa-vrp.
* g++.dg/ipa/pure-const-2.C: Disable ipa-vrp.
* g++.dg/lto/inline-crossmodule-1_0.C: Disable ipa-vrp.
* gcc.c-torture/compile/pr106433.c: Add noipa attribute to prevent ipa-vrp.
* gcc.c-torture/execute/frame-address.c: Likewise.
* gcc.dg/vla-1.c: Add noipa attribute to prevent ipa-vrp.
* gcc.dg/ipa/fopt-info-inline-1.c: Disable ipa-vrp.
* gcc.dg/ipa/ipa-icf-25.c: Disable ipa-vrp.
* gcc.dg/ipa/ipa-icf-38.c: Disable ipa-vrp.
* gcc.dg/ipa/pure-const-1.c: Disable ipa-vrp.
* gcc.dg/ipa/remref-0.c: Add noipa attribute to prevent ipa-vrp.
* gcc.dg/tree-prof/time-profiler-1.c: Disable ipa-vrp.
* gcc.dg/tree-prof/time-profiler-2.c: Disable ipa-vrp.
* gcc.dg/tree-ssa/pr110269.c: Disable ipa-vrp.
* gcc.dg/tree-ssa/pr20701.c: Disable ipa-vrp.
* gcc.dg/tree-ssa/vrp05.c: Disable ipa-vrp.
* gcc.dg/tree-ssa/return-value-range-1.c: New test.
Diff:
---
gcc/cgraph.cc | 48 ++++++++++++++
gcc/cgraph.h | 4 ++
gcc/common.opt | 4 ++
gcc/doc/invoke.texi | 6 +-
gcc/gimple-range-fold.cc | 24 +++++++
gcc/ipa-prop.cc | 73 ++++++++++++++++++++++
gcc/ipa-prop.h | 5 +-
gcc/ipa-pure-const.cc | 9 +++
gcc/ipa-utils.h | 1 +
gcc/symbol-summary.h | 2 +-
gcc/testsuite/g++.dg/ipa/devirt-2.C | 2 +-
gcc/testsuite/g++.dg/ipa/devirt-7.C | 2 +-
gcc/testsuite/g++.dg/ipa/ipa-icf-2.C | 2 +-
gcc/testsuite/g++.dg/ipa/ipa-icf-3.C | 2 +-
gcc/testsuite/g++.dg/ipa/ivinline-1.C | 2 +-
gcc/testsuite/g++.dg/ipa/ivinline-3.C | 2 +-
gcc/testsuite/g++.dg/ipa/ivinline-5.C | 2 +-
gcc/testsuite/g++.dg/ipa/ivinline-8.C | 2 +-
gcc/testsuite/g++.dg/ipa/nothrow-1.C | 2 +-
gcc/testsuite/g++.dg/ipa/pure-const-1.C | 2 +-
gcc/testsuite/g++.dg/ipa/pure-const-2.C | 2 +-
gcc/testsuite/g++.dg/lto/inline-crossmodule-1_0.C | 2 +-
gcc/testsuite/gcc.c-torture/compile/pr106433.c | 2 +-
.../gcc.c-torture/execute/frame-address.c | 8 +--
gcc/testsuite/gcc.dg/ipa/fopt-info-inline-1.c | 2 +-
gcc/testsuite/gcc.dg/ipa/ipa-icf-25.c | 2 +-
gcc/testsuite/gcc.dg/ipa/ipa-icf-38.c | 2 +-
gcc/testsuite/gcc.dg/ipa/pure-const-1.c | 2 +-
gcc/testsuite/gcc.dg/ipa/remref-0.c | 2 +-
gcc/testsuite/gcc.dg/nonnull-7.c | 10 +++
gcc/testsuite/gcc.dg/tree-prof/time-profiler-1.c | 2 +-
gcc/testsuite/gcc.dg/tree-prof/time-profiler-2.c | 2 +-
gcc/testsuite/gcc.dg/tree-ssa/pr110269.c | 2 +-
gcc/testsuite/gcc.dg/tree-ssa/pr20701.c | 2 +-
.../gcc.dg/tree-ssa/return-value-range-1.c | 22 +++++++
gcc/testsuite/gcc.dg/tree-ssa/vrp05.c | 2 +-
gcc/testsuite/gcc.dg/vla-1.c | 2 +-
gcc/tree-vrp.cc | 51 +++++++++++++++
38 files changed, 283 insertions(+), 32 deletions(-)
diff --git a/gcc/cgraph.cc b/gcc/cgraph.cc
index e41e5ad3ae7..f93259a8c70 100644
--- a/gcc/cgraph.cc
+++ b/gcc/cgraph.cc
@@ -2629,6 +2629,54 @@ cgraph_node::set_malloc_flag (bool malloc_p)
return changed;
}
+/* Worker to set malloc flag. */
+static void
+add_detected_attribute_1 (cgraph_node *node, const char *attr, bool *changed)
+{
+ if (!lookup_attribute (attr, DECL_ATTRIBUTES (node->decl)))
+ {
+ DECL_ATTRIBUTES (node->decl) = tree_cons (get_identifier (attr),
+ NULL_TREE, DECL_ATTRIBUTES (node->decl));
+ *changed = true;
+ }
+
+ ipa_ref *ref;
+ FOR_EACH_ALIAS (node, ref)
+ {
+ cgraph_node *alias = dyn_cast<cgraph_node *> (ref->referring);
+ if (alias->get_availability () > AVAIL_INTERPOSABLE)
+ add_detected_attribute_1 (alias, attr, changed);
+ }
+
+ for (cgraph_edge *e = node->callers; e; e = e->next_caller)
+ if (e->caller->thunk
+ && (e->caller->get_availability () > AVAIL_INTERPOSABLE))
+ add_detected_attribute_1 (e->caller, attr, changed);
+}
+
+/* Add attribyte ATTR to function and its aliases. */
+
+bool
+cgraph_node::add_detected_attribute (const char *attr)
+{
+ bool changed = false;
+
+ if (get_availability () > AVAIL_INTERPOSABLE)
+ add_detected_attribute_1 (this, attr, &changed);
+ else
+ {
+ ipa_ref *ref;
+
+ FOR_EACH_ALIAS (this, ref)
+ {
+ cgraph_node *alias = dyn_cast<cgraph_node *> (ref->referring);
+ if (alias->get_availability () > AVAIL_INTERPOSABLE)
+ add_detected_attribute_1 (alias, attr, &changed);
+ }
+ }
+ return changed;
+}
+
/* Worker to set noreturng flag. */
static void
set_noreturn_flag_1 (cgraph_node *node, bool noreturn_p, bool *changed)
diff --git a/gcc/cgraph.h b/gcc/cgraph.h
index cedaaac3a45..cfdd9f693a8 100644
--- a/gcc/cgraph.h
+++ b/gcc/cgraph.h
@@ -1190,6 +1190,10 @@ struct GTY((tag ("SYMTAB_FUNCTION"))) cgraph_node : public symtab_node
bool set_pure_flag (bool pure, bool looping);
+ /* Add attribute ATTR to cgraph_node's decl and on aliases of the node
+ if any. */
+ bool add_detected_attribute (const char *attr);
+
/* Call callback on function and aliases associated to the function.
When INCLUDE_OVERWRITABLE is false, overwritable aliases and thunks are
skipped. */
diff --git a/gcc/common.opt b/gcc/common.opt
index d21db5d4a20..35971c501fc 100644
--- a/gcc/common.opt
+++ b/gcc/common.opt
@@ -781,6 +781,10 @@ Wsuggest-attribute=malloc
Common Var(warn_suggest_attribute_malloc) Warning
Warn about functions which might be candidates for __attribute__((malloc)).
+Wsuggest-attribute=returns_nonnull
+Common Var(warn_suggest_attribute_returns_nonnull) Warning
+Warn about functions which might be candidates for __attribute__((returns_nonnull)).
+
Wsuggest-final-types
Common Var(warn_suggest_final_types) Warning
Warn about C++ polymorphic types where adding final keyword would improve code quality.
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi
index bc9f4f70914..086be0f40d2 100644
--- a/gcc/doc/invoke.texi
+++ b/gcc/doc/invoke.texi
@@ -8093,7 +8093,7 @@ if the array is referenced as a flexible array member.
@opindex Wsuggest-attribute=
@opindex Wno-suggest-attribute=
-@item -Wsuggest-attribute=@r{[}pure@r{|}const@r{|}noreturn@r{|}format@r{|}cold@r{|}malloc@r{]}
+@item -Wsuggest-attribute=@r{[}pure@r{|}const@r{|}noreturn@r{|}format@r{|}cold@r{|}malloc@r{]}returns_nonnull@r{|}
Warn for cases where adding an attribute may be beneficial. The
attributes currently supported are listed below.
@@ -8113,9 +8113,11 @@ attributes currently supported are listed below.
@itemx -Wsuggest-attribute=noreturn
@itemx -Wmissing-noreturn
@itemx -Wsuggest-attribute=malloc
+@itemx -Wsuggest-attribute=returns_nonnull
+@itemx -Wno-suggest-attribute=returns_nonnull
Warn about functions that might be candidates for attributes
-@code{pure}, @code{const} or @code{noreturn} or @code{malloc}. The compiler
+@code{pure}, @code{const}, @code{noreturn}, @code{malloc} or @code{returns_nonnull}. The compiler
only warns for functions visible in other compilation units or (in the case of
@code{pure} and @code{const}) if it cannot prove that the function returns
normally. A function returns normally if it doesn't contain an infinite loop or
diff --git a/gcc/gimple-range-fold.cc b/gcc/gimple-range-fold.cc
index 6e9530c3d7f..998b7608d78 100644
--- a/gcc/gimple-range-fold.cc
+++ b/gcc/gimple-range-fold.cc
@@ -44,6 +44,11 @@ along with GCC; see the file COPYING3. If not see
#include "value-query.h"
#include "gimple-range-op.h"
#include "gimple-range.h"
+#include "cgraph.h"
+#include "alloc-pool.h"
+#include "symbol-summary.h"
+#include "ipa-utils.h"
+#include "ipa-prop.h"
// Construct a fur_source, and set the m_query field.
fur_source::fur_source (range_query *q)
@@ -1013,6 +1018,25 @@ fold_using_range::range_of_call (vrange &r, gcall *call, fur_source &)
else
r.set_varying (type);
+ tree callee = gimple_call_fndecl (call);
+ if (callee
+ && useless_type_conversion_p (TREE_TYPE (TREE_TYPE (callee)), type))
+ {
+ Value_Range val;
+ if (ipa_return_value_range (val, callee))
+ {
+ r.intersect (val);
+ if (dump_file && (dump_flags & TDF_DETAILS))
+ {
+ fprintf (dump_file, "Using return value range of ");
+ print_generic_expr (dump_file, callee, TDF_SLIM);
+ fprintf (dump_file, ": ");
+ val.dump (dump_file);
+ fprintf (dump_file, "\n");
+ }
+ }
+ }
+
// If there is an LHS, intersect that with what is known.
if (lhs)
{
diff --git a/gcc/ipa-prop.cc b/gcc/ipa-prop.cc
index 7de2b788185..e77bc9c340b 100644
--- a/gcc/ipa-prop.cc
+++ b/gcc/ipa-prop.cc
@@ -237,6 +237,35 @@ gt_ggc_mx (ipa_vr *&x)
return gt_ggc_mx ((ipa_vr *) x);
}
+/* Analysis summery of function call return value. */
+struct GTY(()) ipa_return_value_summary
+{
+ /* Known value range.
+ This needs to be wrapped in struccture due to specific way
+ we allocate ipa_vr. */
+ ipa_vr *vr;
+};
+
+/* Function summary for return values. */
+class ipa_return_value_sum_t : public function_summary <ipa_return_value_summary *>
+{
+public:
+ ipa_return_value_sum_t (symbol_table *table, bool ggc):
+ function_summary <ipa_return_value_summary *> (table, ggc) { }
+
+ /* Hook that is called by summary when a node is duplicated. */
+ void duplicate (cgraph_node *,
+ cgraph_node *,
+ ipa_return_value_summary *data,
+ ipa_return_value_summary *data2) final override
+ {
+ *data2=*data;
+ }
+};
+
+/* Variable hoding the return value summary. */
+static GTY(()) function_summary <ipa_return_value_summary *> *ipa_return_value_sum;
+
/* Return true if DECL_FUNCTION_SPECIFIC_OPTIMIZATION of the decl associated
with NODE should prevent us from analyzing it for the purposes of IPA-CP. */
@@ -5915,5 +5944,49 @@ ipcp_transform_function (struct cgraph_node *node)
return modified_mem_access ? TODO_update_ssa_only_virtuals : 0;
}
+/* Record that current function return value range is VAL. */
+
+void
+ipa_record_return_value_range (Value_Range val)
+{
+ cgraph_node *n = cgraph_node::get (current_function_decl);
+ if (!ipa_return_value_sum)
+ {
+ if (!ipa_vr_hash_table)
+ ipa_vr_hash_table = hash_table<ipa_vr_ggc_hash_traits>::create_ggc (37);
+ ipa_return_value_sum = new (ggc_alloc_no_dtor <ipa_return_value_sum_t> ())
+ ipa_return_value_sum_t (symtab, true);
+ ipa_return_value_sum->disable_insertion_hook ();
+ }
+ ipa_return_value_sum->get_create (n)->vr = ipa_get_value_range (val);
+ if (dump_file && (dump_flags & TDF_DETAILS))
+ {
+ fprintf (dump_file, "Recording return range ");
+ val.dump (dump_file);
+ fprintf (dump_file, "\n");
+ }
+}
+
+/* Return true if value range of DECL is known and if so initialize RANGE. */
+
+bool
+ipa_return_value_range (Value_Range &range, tree decl)
+{
+ cgraph_node *n = cgraph_node::get (decl);
+ if (!n || !ipa_return_value_sum)
+ return false;
+ enum availability avail;
+ n = n->ultimate_alias_target (&avail);
+ if (avail < AVAIL_AVAILABLE)
+ return false;
+ if (n->decl != decl && !useless_type_conversion_p (TREE_TYPE (decl), TREE_TYPE (n->decl)))
+ return false;
+ ipa_return_value_summary *v = ipa_return_value_sum->get (n);
+ if (!v)
+ return false;
+ v->vr->get_vrange (range);
+ return true;
+}
+
#include "gt-ipa-prop.h"
diff --git a/gcc/ipa-prop.h b/gcc/ipa-prop.h
index fcd0e5c638f..5901c805c40 100644
--- a/gcc/ipa-prop.h
+++ b/gcc/ipa-prop.h
@@ -309,7 +309,7 @@ public:
void get_vrange (Value_Range &) const;
bool equal_p (const vrange &) const;
const vrange_storage *storage () const { return m_storage; }
- void streamer_read (lto_input_block *, data_in *);
+ void streamer_read (lto_input_block *, class data_in *);
void streamer_write (output_block *) const;
void dump (FILE *) const;
@@ -1274,4 +1274,7 @@ ipa_range_set_and_normalize (vrange &r, tree val)
r.set (val, val);
}
+bool ipa_return_value_range (Value_Range &range, tree decl);
+void ipa_record_return_value_range (Value_Range val);
+
#endif /* IPA_PROP_H */
diff --git a/gcc/ipa-pure-const.cc b/gcc/ipa-pure-const.cc
index 058a7dd3019..3060ffeefcd 100644
--- a/gcc/ipa-pure-const.cc
+++ b/gcc/ipa-pure-const.cc
@@ -292,6 +292,15 @@ warn_function_cold (tree decl)
true, warned_about, "cold");
}
+void
+warn_function_returns_nonnull (tree decl)
+{
+ static hash_set<tree> *warned_about;
+ warned_about
+ = suggest_attribute (OPT_Wsuggest_attribute_returns_nonnull, decl,
+ true, warned_about, "returns_nonnull");
+}
+
/* Check to see if the use (or definition when CHECKING_WRITE is true)
variable T is legal in a function that is either pure or const. */
diff --git a/gcc/ipa-utils.h b/gcc/ipa-utils.h
index 0eefcf40d44..84728c589ea 100644
--- a/gcc/ipa-utils.h
+++ b/gcc/ipa-utils.h
@@ -105,6 +105,7 @@ tree prevailing_odr_type (tree type);
void enable_odr_based_tbaa (tree type);
bool odr_based_tbaa_p (const_tree type);
void set_type_canonical_for_odr_type (tree type, tree canonical);
+void warn_function_returns_nonnull (tree);
void register_odr_enum (tree type);
diff --git a/gcc/symbol-summary.h b/gcc/symbol-summary.h
index 3ed61627382..5fd49a2552e 100644
--- a/gcc/symbol-summary.h
+++ b/gcc/symbol-summary.h
@@ -71,7 +71,7 @@ public:
= m_symtab->add_cgraph_insertion_hook (m_symtab_insertion, this);
}
- /* Enable insertion hook invocation. */
+ /* Disable insertion hook invocation. */
void disable_insertion_hook ()
{
if (m_symtab_insertion_hook != NULL)
diff --git a/gcc/testsuite/g++.dg/ipa/devirt-2.C b/gcc/testsuite/g++.dg/ipa/devirt-2.C
index 48a94e09828..1797db6c81c 100644
--- a/gcc/testsuite/g++.dg/ipa/devirt-2.C
+++ b/gcc/testsuite/g++.dg/ipa/devirt-2.C
@@ -43,7 +43,7 @@ int C::foo (int i)
return i + 3;
}
-int __attribute__ ((noinline,noclone)) get_input(void)
+int __attribute__ ((noinline,noclone,noipa)) get_input(void)
{
return 1;
}
diff --git a/gcc/testsuite/g++.dg/ipa/devirt-7.C b/gcc/testsuite/g++.dg/ipa/devirt-7.C
index f27a264fd1e..b24b2bca5f9 100644
--- a/gcc/testsuite/g++.dg/ipa/devirt-7.C
+++ b/gcc/testsuite/g++.dg/ipa/devirt-7.C
@@ -1,7 +1,7 @@
/* Verify that IPA-CP can do devirtualization even if the virtual call
comes from a method that has been early-inlined into a descendant. */
/* { dg-do run } */
-/* { dg-options "-O3 -fdump-ipa-cp" } */
+/* { dg-options "-O3 -fdump-ipa-cp -fno-ipa-vrp" } */
/* { dg-add-options bind_pic_locally } */
extern "C" void abort (void);
diff --git a/gcc/testsuite/g++.dg/ipa/ipa-icf-2.C b/gcc/testsuite/g++.dg/ipa/ipa-icf-2.C
index 7f56189eebb..ae121e8a762 100644
--- a/gcc/testsuite/g++.dg/ipa/ipa-icf-2.C
+++ b/gcc/testsuite/g++.dg/ipa/ipa-icf-2.C
@@ -1,5 +1,5 @@
/* { dg-do compile } */
-/* { dg-options "-O2 -fdump-ipa-icf-optimized" } */
+/* { dg-options "-O2 -fdump-ipa-icf-optimized -fno-ipa-vrp" } */
class A
{
diff --git a/gcc/testsuite/g++.dg/ipa/ipa-icf-3.C b/gcc/testsuite/g++.dg/ipa/ipa-icf-3.C
index 5a3cca24fa2..03c10f12db2 100644
--- a/gcc/testsuite/g++.dg/ipa/ipa-icf-3.C
+++ b/gcc/testsuite/g++.dg/ipa/ipa-icf-3.C
@@ -1,5 +1,5 @@
/* { dg-do compile } */
-/* { dg-options "-O2 -fdump-ipa-icf-optimized" } */
+/* { dg-options "-O2 -fdump-ipa-icf-optimized -fno-ipa-vrp" } */
__attribute__ ((noinline))
int zero()
diff --git a/gcc/testsuite/g++.dg/ipa/ivinline-1.C b/gcc/testsuite/g++.dg/ipa/ivinline-1.C
index 2d988bc6d55..ccb1870ec69 100644
--- a/gcc/testsuite/g++.dg/ipa/ivinline-1.C
+++ b/gcc/testsuite/g++.dg/ipa/ivinline-1.C
@@ -1,7 +1,7 @@
/* Verify that simple virtual calls are inlined even without early
inlining. */
/* { dg-do run { target { nonpic || pie_enabled } } } */
-/* { dg-options "-O3 -fdump-ipa-inline -fno-early-inlining -fno-ipa-cp" } */
+/* { dg-options "-O3 -fdump-ipa-inline -fno-early-inlining -fno-ipa-cp -fno-ipa-vrp" } */
extern "C" void abort (void);
diff --git a/gcc/testsuite/g++.dg/ipa/ivinline-3.C b/gcc/testsuite/g++.dg/ipa/ivinline-3.C
index f756a16bae9..02e7e443fa9 100644
--- a/gcc/testsuite/g++.dg/ipa/ivinline-3.C
+++ b/gcc/testsuite/g++.dg/ipa/ivinline-3.C
@@ -1,7 +1,7 @@
/* Verify that simple virtual calls on an object refrence are inlined
even without early inlining. */
/* { dg-do run { target { nonpic || pie_enabled } } } */
-/* { dg-options "-O3 -fdump-ipa-inline -fno-early-inlining -fno-ipa-cp" } */
+/* { dg-options "-O3 -fdump-ipa-inline -fno-early-inlining -fno-ipa-cp -fno-ipa-vrp" } */
extern "C" void abort (void);
diff --git a/gcc/testsuite/g++.dg/ipa/ivinline-5.C b/gcc/testsuite/g++.dg/ipa/ivinline-5.C
index 6c19907686e..cb889d1e84f 100644
--- a/gcc/testsuite/g++.dg/ipa/ivinline-5.C
+++ b/gcc/testsuite/g++.dg/ipa/ivinline-5.C
@@ -1,7 +1,7 @@
/* Verify that virtual call inlining does not pick a wrong method when
there is a user defined ancestor in an object. */
/* { dg-do run { target { nonpic || pie_enabled } } } */
-/* { dg-options "-O3 -fdump-ipa-inline -fno-early-inlining -fno-ipa-cp" } */
+/* { dg-options "-O3 -fdump-ipa-inline -fno-early-inlining -fno-ipa-cp -fno-ipa-vrp" } */
extern "C" void abort (void);
diff --git a/gcc/testsuite/g++.dg/ipa/ivinline-8.C b/gcc/testsuite/g++.dg/ipa/ivinline-8.C
index bc81abfe347..f29e818e357 100644
--- a/gcc/testsuite/g++.dg/ipa/ivinline-8.C
+++ b/gcc/testsuite/g++.dg/ipa/ivinline-8.C
@@ -1,7 +1,7 @@
/* Verify that virtual calls are inlined (ithout early inlining) even
when their caller is itself indirectly inlined. */
/* { dg-do run { target { nonpic || pie_enabled } } } */
-/* { dg-options "-O3 -fdump-ipa-inline -fno-early-inlining -fno-ipa-cp" } */
+/* { dg-options "-O3 -fdump-ipa-inline -fno-early-inlining -fno-ipa-cp -fno-ipa-vrp" } */
extern "C" void abort (void);
diff --git a/gcc/testsuite/g++.dg/ipa/nothrow-1.C b/gcc/testsuite/g++.dg/ipa/nothrow-1.C
index b30b0215924..1f243109619 100644
--- a/gcc/testsuite/g++.dg/ipa/nothrow-1.C
+++ b/gcc/testsuite/g++.dg/ipa/nothrow-1.C
@@ -1,5 +1,5 @@
/* { dg-do compile } */
-/* { dg-options "-O2 -fnon-call-exceptions -fdump-tree-optimized" } */
+/* { dg-options "-O2 -fnon-call-exceptions -fdump-tree-optimized -fno-ipa-vrp" } */
int *ptr;
static int barvar;
diff --git a/gcc/testsuite/g++.dg/ipa/pure-const-1.C b/gcc/testsuite/g++.dg/ipa/pure-const-1.C
index 61940c670e7..c18278cae11 100644
--- a/gcc/testsuite/g++.dg/ipa/pure-const-1.C
+++ b/gcc/testsuite/g++.dg/ipa/pure-const-1.C
@@ -1,5 +1,5 @@
/* { dg-do compile } */
-/* { dg-options "-O2 -fdump-tree-optimized" } */
+/* { dg-options "-O2 -fdump-tree-optimized -fno-ipa-vrp" } */
int *ptr;
static int barvar;
diff --git a/gcc/testsuite/g++.dg/ipa/pure-const-2.C b/gcc/testsuite/g++.dg/ipa/pure-const-2.C
index 6e739de4ade..d5f18bfa9be 100644
--- a/gcc/testsuite/g++.dg/ipa/pure-const-2.C
+++ b/gcc/testsuite/g++.dg/ipa/pure-const-2.C
@@ -1,5 +1,5 @@
/* { dg-do compile } */
-/* { dg-options "-O2 -fdump-tree-optimized" } */
+/* { dg-options "-O2 -fdump-tree-optimized -fno-ipa-vrp" } */
int *ptr;
static int barvar;
/* We can not detect A to be const because it may be interposed by unoptimized
diff --git a/gcc/testsuite/g++.dg/lto/inline-crossmodule-1_0.C b/gcc/testsuite/g++.dg/lto/inline-crossmodule-1_0.C
index 0294dcc4bfb..c56360ef66e 100644
--- a/gcc/testsuite/g++.dg/lto/inline-crossmodule-1_0.C
+++ b/gcc/testsuite/g++.dg/lto/inline-crossmodule-1_0.C
@@ -1,5 +1,5 @@
// { dg-lto-do link }
-/* { dg-lto-options { "-O2 -fno-early-inlining -fno-implicit-constexpr -flto -fdump-ipa-inline-details" } } */
+/* { dg-lto-options { "-O2 -fno-early-inlining -fno-implicit-constexpr -flto -fdump-ipa-inline-details -fno-ipa-vrp" } } */
#include "inline-crossmodule-1.h"
int a::key ()
{
diff --git a/gcc/testsuite/gcc.c-torture/compile/pr106433.c b/gcc/testsuite/gcc.c-torture/compile/pr106433.c
index b840e5ecd93..e02ad5ffe15 100644
--- a/gcc/testsuite/gcc.c-torture/compile/pr106433.c
+++ b/gcc/testsuite/gcc.c-torture/compile/pr106433.c
@@ -2,7 +2,7 @@
int m, *p;
-__attribute__ ((simd)) int
+__attribute__ ((simd,noipa)) int
bar (int x)
{
if (x)
diff --git a/gcc/testsuite/gcc.c-torture/execute/frame-address.c b/gcc/testsuite/gcc.c-torture/execute/frame-address.c
index 5afa691e409..5950581054d 100644
--- a/gcc/testsuite/gcc.c-torture/execute/frame-address.c
+++ b/gcc/testsuite/gcc.c-torture/execute/frame-address.c
@@ -1,10 +1,10 @@
/* { dg-require-effective-target return_address } */
void abort (void);
-int check_fa_work (const char *, const char *) __attribute__((noinline));
-int check_fa_mid (const char *) __attribute__((noinline));
-int check_fa (char *) __attribute__((noinline));
-int how_much (void) __attribute__((noinline));
+int check_fa_work (const char *, const char *) __attribute__((noinline,noipa));
+int check_fa_mid (const char *) __attribute__((noinline,noipa));
+int check_fa (char *) __attribute__((noinline,noipa));
+int how_much (void) __attribute__((noinline,noipa));
int check_fa_work (const char *c, const char *f)
{
diff --git a/gcc/testsuite/gcc.dg/ipa/fopt-info-inline-1.c b/gcc/testsuite/gcc.dg/ipa/fopt-info-inline-1.c
index 4032ad13e19..155a6829b88 100644
--- a/gcc/testsuite/gcc.dg/ipa/fopt-info-inline-1.c
+++ b/gcc/testsuite/gcc.dg/ipa/fopt-info-inline-1.c
@@ -1,4 +1,4 @@
-/* { dg-options "-O3 -fopt-info-inline-optimized-missed" } */
+/* { dg-options "-O3 -fopt-info-inline-optimized-missed -fno-ipa-vrp" } */
static int foo (int a)
{
diff --git a/gcc/testsuite/gcc.dg/ipa/ipa-icf-25.c b/gcc/testsuite/gcc.dg/ipa/ipa-icf-25.c
index fad0891283e..cbda6858890 100644
--- a/gcc/testsuite/gcc.dg/ipa/ipa-icf-25.c
+++ b/gcc/testsuite/gcc.dg/ipa/ipa-icf-25.c
@@ -1,5 +1,5 @@
/* { dg-do compile } */
-/* { dg-options "-O2 -fdump-ipa-icf-optimized-all" } */
+/* { dg-options "-O2 -fdump-ipa-icf-optimized-all -fno-ipa-vrp" } */
static int zip();
static int zap();
diff --git a/gcc/testsuite/gcc.dg/ipa/ipa-icf-38.c b/gcc/testsuite/gcc.dg/ipa/ipa-icf-38.c
index 57c5262dd4a..a8824d040e5 100644
--- a/gcc/testsuite/gcc.dg/ipa/ipa-icf-38.c
+++ b/gcc/testsuite/gcc.dg/ipa/ipa-icf-38.c
@@ -1,6 +1,6 @@
/* { dg-do link } */
/* { dg-require-alias "" } */
-/* { dg-options "-O2 -fdump-ipa-icf-optimized -flto -fdump-tree-optimized" } */
+/* { dg-options "-O2 -fdump-ipa-icf-optimized -flto -fdump-tree-optimized -fno-ipa-vrp" } */
/* { dg-require-effective-target lto } */
/* { dg-additional-sources "ipa-icf-38a.c" }*/
diff --git a/gcc/testsuite/gcc.dg/ipa/pure-const-1.c b/gcc/testsuite/gcc.dg/ipa/pure-const-1.c
index dd58457b629..10b572781c7 100644
--- a/gcc/testsuite/gcc.dg/ipa/pure-const-1.c
+++ b/gcc/testsuite/gcc.dg/ipa/pure-const-1.c
@@ -1,5 +1,5 @@
/* { dg-do compile { target { nonpic || pie_enabled } } } */
-/* { dg-options "-O3 -fdump-tree-local-pure-const1 -fdump-ipa-pure-const -fdump-tree-optimized -fno-early-inlining -fgnu89-inline" } */
+/* { dg-options "-O3 -fno-ipa-vrp -fdump-tree-local-pure-const1 -fdump-ipa-pure-const -fdump-tree-optimized -fno-early-inlining -fgnu89-inline" } */
void abort (void);
int error_code;
static int val;
diff --git a/gcc/testsuite/gcc.dg/ipa/remref-0.c b/gcc/testsuite/gcc.dg/ipa/remref-0.c
index 6073c028a98..497136e3607 100644
--- a/gcc/testsuite/gcc.dg/ipa/remref-0.c
+++ b/gcc/testsuite/gcc.dg/ipa/remref-0.c
@@ -3,7 +3,7 @@
/* { dg-do compile } */
/* { dg-options "-O3 -fno-early-inlining -fno-ipa-sra -fno-ipa-cp -fdump-ipa-inline -fdump-tree-optimized" } */
-extern int __attribute__ ((noinline, noclone, used))
+extern int __attribute__ ((noinline, noclone, used, noipa))
stuff (int i)
{
return 0;
diff --git a/gcc/testsuite/gcc.dg/nonnull-7.c b/gcc/testsuite/gcc.dg/nonnull-7.c
new file mode 100644
index 00000000000..d66a60985b0
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/nonnull-7.c
@@ -0,0 +1,10 @@
+/* { dg-do compile { target nonpic } }
+ { dg-options "-O2 -Wsuggest-attribute=returns_nonnull" } */
+
+int *q;
+int *test() /* { dg-warning "candidate for attribute .returns_nonnull." } */
+{
+ if (!q)
+ __builtin_unreachable ();
+ return q;
+}
diff --git a/gcc/testsuite/gcc.dg/tree-prof/time-profiler-1.c b/gcc/testsuite/gcc.dg/tree-prof/time-profiler-1.c
index 455f923f3f4..3f1d1e04619 100644
--- a/gcc/testsuite/gcc.dg/tree-prof/time-profiler-1.c
+++ b/gcc/testsuite/gcc.dg/tree-prof/time-profiler-1.c
@@ -1,4 +1,4 @@
-/* { dg-options "-O2 -fdump-ipa-profile" } */
+/* { dg-options "-O2 -fdump-ipa-profile -fno-ipa-vrp" } */
__attribute__ ((noinline))
int foo()
diff --git a/gcc/testsuite/gcc.dg/tree-prof/time-profiler-2.c b/gcc/testsuite/gcc.dg/tree-prof/time-profiler-2.c
index e6eaeb99810..eed0b1dd08d 100644
--- a/gcc/testsuite/gcc.dg/tree-prof/time-profiler-2.c
+++ b/gcc/testsuite/gcc.dg/tree-prof/time-profiler-2.c
@@ -1,4 +1,4 @@
-/* { dg-options "-O2 -fdump-ipa-profile" } */
+/* { dg-options "-O2 -fdump-ipa-profile -fno-ipa-vrp" } */
#include <unistd.h>
diff --git a/gcc/testsuite/gcc.dg/tree-ssa/pr110269.c b/gcc/testsuite/gcc.dg/tree-ssa/pr110269.c
index c68a6f91604..dd5022f3b0c 100644
--- a/gcc/testsuite/gcc.dg/tree-ssa/pr110269.c
+++ b/gcc/testsuite/gcc.dg/tree-ssa/pr110269.c
@@ -1,5 +1,5 @@
/* { dg-do compile } */
-/* { dg-options "-O2 -fdump-tree-ccp2 -fdump-tree-optimized" } */
+/* { dg-options "-O2 -fdump-tree-ccp2 -fdump-tree-optimized -fno-ipa-vrp" } */
void foo(void);
static int a = 1, c;
diff --git a/gcc/testsuite/gcc.dg/tree-ssa/pr20701.c b/gcc/testsuite/gcc.dg/tree-ssa/pr20701.c
index f05076cafac..3a7c03b27ff 100644
--- a/gcc/testsuite/gcc.dg/tree-ssa/pr20701.c
+++ b/gcc/testsuite/gcc.dg/tree-ssa/pr20701.c
@@ -1,5 +1,5 @@
/* { dg-do compile } */
-/* { dg-options "-O2 -fdump-tree-vrp1 -fno-early-inlining -fdelete-null-pointer-checks -fno-thread-jumps" } */
+/* { dg-options "-O2 -fdump-tree-vrp1 -fno-early-inlining -fdelete-null-pointer-checks -fno-thread-jumps -fno-ipa-vrp" } */
typedef struct {
int code;
diff --git a/gcc/testsuite/gcc.dg/tree-ssa/return-value-range-1.c b/gcc/testsuite/gcc.dg/tree-ssa/return-value-range-1.c
new file mode 100644
index 00000000000..4db52233c5d
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/tree-ssa/return-value-range-1.c
@@ -0,0 +1,22 @@
+/* { dg-do ling } */
+/* { dg-options "-O1 -dump-tree-evrp-details" } */
+__attribute__ ((__noinline__))
+int a(char c)
+{
+ return c;
+}
+void link_error ();
+
+void
+test(int d)
+{
+ if (a(d) > 200)
+ link_error ();
+}
+int
+main(int argc, char **argv)
+{
+ test(argc);
+ return 0;
+}
+/* { dg-final { scan-tree-dump-times "Recording return range" 2 "evrp"} } */
diff --git a/gcc/testsuite/gcc.dg/tree-ssa/vrp05.c b/gcc/testsuite/gcc.dg/tree-ssa/vrp05.c
index 7f38e8d3852..f7ba16c20bb 100644
--- a/gcc/testsuite/gcc.dg/tree-ssa/vrp05.c
+++ b/gcc/testsuite/gcc.dg/tree-ssa/vrp05.c
@@ -1,5 +1,5 @@
/* { dg-do compile } */
-/* { dg-options "-O2 -fdump-tree-vrp1 -fno-early-inlining -fno-thread-jumps" } */
+/* { dg-options "-O2 -fdump-tree-vrp1 -fno-early-inlining -fno-thread-jumps -fno-ipa-vrp" } */
inline int ten()
diff --git a/gcc/testsuite/gcc.dg/vla-1.c b/gcc/testsuite/gcc.dg/vla-1.c
index 902166cb18c..12aa314f385 100644
--- a/gcc/testsuite/gcc.dg/vla-1.c
+++ b/gcc/testsuite/gcc.dg/vla-1.c
@@ -1,7 +1,7 @@
/* { dg-do compile } */
/* { dg-options "-g -O3 -fdump-tree-optimized -fvar-tracking-assignments -fno-selective-scheduling -fno-selective-scheduling2" } */
-int __attribute__((noinline))
+int __attribute__((noinline,noipa))
f1 (int i)
{
char a[i + 1];
diff --git a/gcc/tree-vrp.cc b/gcc/tree-vrp.cc
index 917fa873714..82001eff20e 100644
--- a/gcc/tree-vrp.cc
+++ b/gcc/tree-vrp.cc
@@ -52,6 +52,12 @@ along with GCC; see the file COPYING3. If not see
#include "gimple-fold.h"
#include "tree-dfa.h"
#include "tree-ssa-dce.h"
+#include "alloc-pool.h"
+#include "cgraph.h"
+#include "symbol-summary.h"
+#include "ipa-utils.h"
+#include "ipa-prop.h"
+#include "attribs.h"
// This class is utilized by VRP and ranger to remove __builtin_unreachable
// calls, and reflect any resulting global ranges.
@@ -1081,6 +1087,51 @@ execute_ranger_vrp (struct function *fun, bool warn_array_bounds_p,
array_checker.check ();
}
+
+ if (Value_Range::supports_type_p (TREE_TYPE
+ (TREE_TYPE (current_function_decl)))
+ && flag_ipa_vrp
+ && !lookup_attribute ("noipa", DECL_ATTRIBUTES (current_function_decl)))
+ {
+ edge e;
+ edge_iterator ei;
+ bool found = false;
+ Value_Range return_range (TREE_TYPE (TREE_TYPE (current_function_decl)));
+ FOR_EACH_EDGE (e, ei, EXIT_BLOCK_PTR_FOR_FN (cfun)->preds)
+ if (greturn *ret = dyn_cast <greturn *> (*gsi_last_bb (e->src)))
+ {
+ tree retval = gimple_return_retval (ret);
+ if (!retval)
+ {
+ return_range.set_varying (TREE_TYPE (TREE_TYPE (current_function_decl)));
+ found = true;
+ continue;
+ }
+ Value_Range r (TREE_TYPE (retval));
+ if (ranger->range_of_expr (r, retval, ret)
+ && !r.undefined_p ()
+ && !r.varying_p ())
+ {
+ if (!found)
+ return_range = r;
+ else
+ return_range.union_ (r);
+ }
+ else
+ return_range.set_varying (TREE_TYPE (retval));
+ found = true;
+ }
+ if (found && !return_range.varying_p ())
+ {
+ ipa_record_return_value_range (return_range);
+ if (POINTER_TYPE_P (TREE_TYPE (TREE_TYPE (current_function_decl)))
+ && return_range.nonzero_p ()
+ && cgraph_node::get (current_function_decl)
+ ->add_detected_attribute ("returns_nonnull"))
+ warn_function_returns_nonnull (current_function_decl);
+ }
+ }
+
phi_analysis_finalize ();
disable_ranger (fun);
scev_finalize ();
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