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* [Bug tree-optimization/51580] New: [4.7 regression] segfault during loop vectorization at -O3
@ 2011-12-16 15:14 ebotcazou at gcc dot gnu.org
2011-12-19 15:59 ` [Bug tree-optimization/51580] " jakub at gcc dot gnu.org
` (2 more replies)
0 siblings, 3 replies; 4+ messages in thread
From: ebotcazou at gcc dot gnu.org @ 2011-12-16 15:14 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51580
Bug #: 51580
Summary: [4.7 regression] segfault during loop vectorization at
-O3
Classification: Unclassified
Product: gcc
Version: 4.7.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: tree-optimization
AssignedTo: unassigned@gcc.gnu.org
ReportedBy: ebotcazou@gcc.gnu.org
Target: i[345]86-*-*
Created attachment 26110
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=26110
Testcase to be gnatchop'ed
The problem was introduced yesterday. Compile loop_optimization1.ads at -O3
for an x86 target and you'll get:
Program received signal SIGSEGV, Segmentation fault.
flow_bb_inside_loop_p (loop=0xf7ca1bb8, bb=0x0)
at /home/eric/svn/gcc/gcc/cfgloop.c:776
776 source_loop = bb->loop_father;
(gdb) bt
#0 flow_bb_inside_loop_p (loop=0xf7ca1bb8, bb=0x0)
at /home/eric/svn/gcc/gcc/cfgloop.c:776
#1 0x08b5a922 in vect_stmt_relevant_p (stmt=stmt@entry=0xf7c9c0c0,
relevant=relevant@entry=0xffffcc4c, live_p=live_p@entry=0xffffcc47,
loop_vinfo=<error reading variable: Unhandled dwarf expression opcode
0xfa>) at /home/eric/svn/gcc/gcc/tree-vect-stmts.c:260
#2 0x08b605c9 in vect_mark_stmts_to_be_vectorized (loop_vinfo=0x9cdc988)
at /home/eric/svn/gcc/gcc/tree-vect-stmts.c:552
#3 0x08b7ad7d in vect_analyze_loop_2 (loop_vinfo=0x9cdc988)
at /home/eric/svn/gcc/gcc/tree-vect-loop.c:1521
#4 vect_analyze_loop (loop=0xf7ca1bb8)
at /home/eric/svn/gcc/gcc/tree-vect-loop.c:1667
#5 0x08b8cc08 in vectorize_loops ()
at /home/eric/svn/gcc/gcc/tree-vectorizer.c:203
The testcase can be added to the testsuite as
gnat.dg/specs/loop_optimization1.ads
gnat.dg/specs/loop_optimization1_pkg.ad[sb]
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug tree-optimization/51580] [4.7 regression] segfault during loop vectorization at -O3
2011-12-16 15:14 [Bug tree-optimization/51580] New: [4.7 regression] segfault during loop vectorization at -O3 ebotcazou at gcc dot gnu.org
@ 2011-12-19 15:59 ` jakub at gcc dot gnu.org
2011-12-19 19:20 ` ebotcazou at gcc dot gnu.org
2011-12-19 19:32 ` ebotcazou at gcc dot gnu.org
2 siblings, 0 replies; 4+ messages in thread
From: jakub at gcc dot gnu.org @ 2011-12-19 15:59 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51580
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> 2011-12-19 15:53:37 UTC ---
Please recheck with current trunk -
http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=182480 or later.
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug tree-optimization/51580] [4.7 regression] segfault during loop vectorization at -O3
2011-12-16 15:14 [Bug tree-optimization/51580] New: [4.7 regression] segfault during loop vectorization at -O3 ebotcazou at gcc dot gnu.org
2011-12-19 15:59 ` [Bug tree-optimization/51580] " jakub at gcc dot gnu.org
@ 2011-12-19 19:20 ` ebotcazou at gcc dot gnu.org
2011-12-19 19:32 ` ebotcazou at gcc dot gnu.org
2 siblings, 0 replies; 4+ messages in thread
From: ebotcazou at gcc dot gnu.org @ 2011-12-19 19:20 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51580
--- Comment #2 from Eric Botcazou <ebotcazou at gcc dot gnu.org> 2011-12-19 19:17:15 UTC ---
Author: ebotcazou
Date: Mon Dec 19 19:17:10 2011
New Revision: 182491
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=182491
Log:
PR tree-optimization/51580
* gnat.dg/specs/loop_optimization1.ads: New test.
* gnat.dg/specs/loop_optimization1_pkg.ad[sb]: New helper.
Added:
trunk/gcc/testsuite/gnat.dg/specs/loop_optimization1.ads
trunk/gcc/testsuite/gnat.dg/specs/loop_optimization1_pkg.adb
trunk/gcc/testsuite/gnat.dg/specs/loop_optimization1_pkg.ads
Modified:
trunk/gcc/testsuite/ChangeLog
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug tree-optimization/51580] [4.7 regression] segfault during loop vectorization at -O3
2011-12-16 15:14 [Bug tree-optimization/51580] New: [4.7 regression] segfault during loop vectorization at -O3 ebotcazou at gcc dot gnu.org
2011-12-19 15:59 ` [Bug tree-optimization/51580] " jakub at gcc dot gnu.org
2011-12-19 19:20 ` ebotcazou at gcc dot gnu.org
@ 2011-12-19 19:32 ` ebotcazou at gcc dot gnu.org
2 siblings, 0 replies; 4+ messages in thread
From: ebotcazou at gcc dot gnu.org @ 2011-12-19 19:32 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51580
Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution| |FIXED
Target Milestone|--- |4.7.0
--- Comment #3 from Eric Botcazou <ebotcazou at gcc dot gnu.org> 2011-12-19 19:19:07 UTC ---
> Please recheck with current trunk -
> http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=182480 or later.
Yep, that did it, thanks.
^ permalink raw reply [flat|nested] 4+ messages in thread
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2011-12-16 15:14 [Bug tree-optimization/51580] New: [4.7 regression] segfault during loop vectorization at -O3 ebotcazou at gcc dot gnu.org
2011-12-19 15:59 ` [Bug tree-optimization/51580] " jakub at gcc dot gnu.org
2011-12-19 19:20 ` ebotcazou at gcc dot gnu.org
2011-12-19 19:32 ` ebotcazou at gcc dot gnu.org
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