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* [Bug middle-end/53959] New: [4.8 Regression] 189.lucas in SPEC CPU 2000 miscompiled by LTO
@ 2012-07-14 2:15 hjl.tools at gmail dot com
2012-07-14 20:32 ` [Bug middle-end/53959] " hjl.tools at gmail dot com
` (3 more replies)
0 siblings, 4 replies; 5+ messages in thread
From: hjl.tools at gmail dot com @ 2012-07-14 2:15 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53959
Bug #: 53959
Summary: [4.8 Regression] 189.lucas in SPEC CPU 2000
miscompiled by LTO
Classification: Unclassified
Product: gcc
Version: 4.8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: middle-end
AssignedTo: unassigned@gcc.gnu.org
ReportedBy: hjl.tools@gmail.com
CC: rguenth@gcc.gnu.org
On Linux/x86-64, revision 189453:
http://gcc.gnu.org/ml/gcc-cvs/2012-07/msg00357.html
caused:
Compiling Binaries
Building 189.lucas ref base lto default
Setting Up Run Directories
Setting up 189.lucas ref base lto default: created
Running Benchmarks
Running 189.lucas ref base lto default
*** Miscompare of lucas2.out, see
/export/gnu/import/git/gcc-regression/spec/200
0/spec/benchspec/CFP2000/189.lucas/run/00000002/lucas2.out.mis
with
-O2 -ffast-math -fwhole-program -flto=jobserver -fuse-linker-plugin
-DSPEC_CPU2000_LP64
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug middle-end/53959] [4.8 Regression] 189.lucas in SPEC CPU 2000 miscompiled by LTO
2012-07-14 2:15 [Bug middle-end/53959] New: [4.8 Regression] 189.lucas in SPEC CPU 2000 miscompiled by LTO hjl.tools at gmail dot com
@ 2012-07-14 20:32 ` hjl.tools at gmail dot com
2012-07-16 9:47 ` rguenth at gcc dot gnu.org
` (2 subsequent siblings)
3 siblings, 0 replies; 5+ messages in thread
From: hjl.tools at gmail dot com @ 2012-07-14 20:32 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53959
--- Comment #1 from H.J. Lu <hjl.tools at gmail dot com> 2012-07-14 20:31:49 UTC ---
Created attachment 27791
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=27791
A testcase
With this patch:
diff --git a/gcc/gimple.c b/gcc/gimple.c
index b419591..988a0aa 100644
--- a/gcc/gimple.c
+++ b/gcc/gimple.c
@@ -3391,6 +3391,7 @@ gimple_types_compatible_p_1 (tree t1, tree t2,
type_pair_t p,
struct obstack *sccstate_obstack)
{
struct sccs *state;
+ bool foo = true;
gcc_assert (p->same_p[GTC_MERGE] == -2);
@@ -3422,6 +3423,10 @@ gimple_types_compatible_p_1 (tree t1, tree t2,
type_pair_t p,
goto different_types;
}
+ /* If their attributes are not the same they can't be the same type. */
+ if (!attribute_list_equal (TYPE_ATTRIBUTES (t1), TYPE_ATTRIBUTES (t2)))
+ foo = false;
+
/* Do type-specific comparisons. */
switch (TREE_CODE (t1))
{
@@ -3660,6 +3665,9 @@ different_types:
/* Common exit path for types that are compatible. */
same_types:
+ if (!foo)
+ gcc_unreachable ();
+
gcc_assert (state->u.same_p == 1);
pop:
I got
[hjl@gnu-32 gcc]$ ./lto1 -quiet -dumpbase lucas_distrib_spec.o -mtune=generic
-march=x86-64 -mtune=generic -march=x86-64 -auxbase lucas_distrib_spec -O2
-version -ffast-math -fwhole-program -fuse-linker-plugin
-fltrans-output-list=/tmp/cc4kxuMN.ltrans.out -fwpa -fresolution=foo.res @foo
GNU GIMPLE (GCC) version 4.8.0 20120713 (experimental)
(x86_64-unknown-linux-gnu)
compiled by GNU C version 4.7.1 20120629 (Red Hat 4.7.1-1), GMP version
5.0.2, MPFR version 3.1.0, MPC version 0.9
GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096
GNU GIMPLE (GCC) version 4.8.0 20120713 (experimental)
(x86_64-unknown-linux-gnu)
compiled by GNU C version 4.7.1 20120629 (Red Hat 4.7.1-1), GMP version
5.0.2, MPFR version 3.1.0, MPC version 0.9
GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096
lto1: internal compiler error: in gimple_types_compatible_p_1, at gimple.c:3669
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
[hjl@gnu-32 gcc]$
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug middle-end/53959] [4.8 Regression] 189.lucas in SPEC CPU 2000 miscompiled by LTO
2012-07-14 2:15 [Bug middle-end/53959] New: [4.8 Regression] 189.lucas in SPEC CPU 2000 miscompiled by LTO hjl.tools at gmail dot com
2012-07-14 20:32 ` [Bug middle-end/53959] " hjl.tools at gmail dot com
@ 2012-07-16 9:47 ` rguenth at gcc dot gnu.org
2012-07-16 12:35 ` hjl at gcc dot gnu.org
2012-07-19 13:59 ` hjl.tools at gmail dot com
3 siblings, 0 replies; 5+ messages in thread
From: rguenth at gcc dot gnu.org @ 2012-07-16 9:47 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53959
Richard Guenther <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2012-07-16
Target Milestone|--- |4.8.0
Ever Confirmed|0 |1
--- Comment #2 from Richard Guenther <rguenth at gcc dot gnu.org> 2012-07-16 09:46:29 UTC ---
Probably a dup.
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug middle-end/53959] [4.8 Regression] 189.lucas in SPEC CPU 2000 miscompiled by LTO
2012-07-14 2:15 [Bug middle-end/53959] New: [4.8 Regression] 189.lucas in SPEC CPU 2000 miscompiled by LTO hjl.tools at gmail dot com
2012-07-14 20:32 ` [Bug middle-end/53959] " hjl.tools at gmail dot com
2012-07-16 9:47 ` rguenth at gcc dot gnu.org
@ 2012-07-16 12:35 ` hjl at gcc dot gnu.org
2012-07-19 13:59 ` hjl.tools at gmail dot com
3 siblings, 0 replies; 5+ messages in thread
From: hjl at gcc dot gnu.org @ 2012-07-16 12:35 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53959
--- Comment #3 from hjl at gcc dot gnu.org <hjl at gcc dot gnu.org> 2012-07-16 12:35:16 UTC ---
Author: hjl
Date: Mon Jul 16 12:35:10 2012
New Revision: 189528
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=189528
Log:
Restore type attribute comparison
PR middle-end/53959
PR bootstrap/53963
* gimple.c (gimple_types_compatible_p_1): Restore type attribute
comparison.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/gimple.c
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug middle-end/53959] [4.8 Regression] 189.lucas in SPEC CPU 2000 miscompiled by LTO
2012-07-14 2:15 [Bug middle-end/53959] New: [4.8 Regression] 189.lucas in SPEC CPU 2000 miscompiled by LTO hjl.tools at gmail dot com
` (2 preceding siblings ...)
2012-07-16 12:35 ` hjl at gcc dot gnu.org
@ 2012-07-19 13:59 ` hjl.tools at gmail dot com
3 siblings, 0 replies; 5+ messages in thread
From: hjl.tools at gmail dot com @ 2012-07-19 13:59 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53959
H.J. Lu <hjl.tools at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution| |FIXED
--- Comment #4 from H.J. Lu <hjl.tools at gmail dot com> 2012-07-19 13:59:45 UTC ---
Fixed.
^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2012-07-19 13:59 UTC | newest]
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2012-07-14 2:15 [Bug middle-end/53959] New: [4.8 Regression] 189.lucas in SPEC CPU 2000 miscompiled by LTO hjl.tools at gmail dot com
2012-07-14 20:32 ` [Bug middle-end/53959] " hjl.tools at gmail dot com
2012-07-16 9:47 ` rguenth at gcc dot gnu.org
2012-07-16 12:35 ` hjl at gcc dot gnu.org
2012-07-19 13:59 ` hjl.tools at gmail dot com
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