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* [Bug tree-optimization/56150] New: ICE segfault in do_pre / tail_merge_optimize @ 2013-01-30 14:44 francesco.zappa.nardelli at gmail dot com 2013-01-30 14:45 ` [Bug tree-optimization/56150] " francesco.zappa.nardelli at gmail dot com ` (4 more replies) 0 siblings, 5 replies; 6+ messages in thread From: francesco.zappa.nardelli at gmail dot com @ 2013-01-30 14:44 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56150 Bug #: 56150 Summary: ICE segfault in do_pre / tail_merge_optimize Classification: Unclassified Product: gcc Version: 4.8.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: tree-optimization AssignedTo: unassigned@gcc.gnu.org ReportedBy: francesco.zappa.nardelli@gmail.com The program below makes gcc version 4.8.0 20130130 (experimental) (GCC) crash (ICE) at optimisation level -O2 and -O3: $ gcc -O2 5-min.c 5-min.c: In function ‘func_1’: 5-min.c:9:6: internal compiler error: Segmentation fault void func_1 () { ^ 0x8e59af crash_signal ../../gcc-svn-src/gcc/toplev.c:332 0xa434a7 vn_valueize ../../gcc-svn-src/gcc/tree-ssa-sccvn.h:226 0xa434a7 gimple_equal_p ../../gcc-svn-src/gcc/tree-ssa-tail-merge.c:1124 0xa434a7 find_duplicate ../../gcc-svn-src/gcc/tree-ssa-tail-merge.c:1214 0xa434a7 find_clusters_1 ../../gcc-svn-src/gcc/tree-ssa-tail-merge.c:1409 0xa434a7 find_clusters ../../gcc-svn-src/gcc/tree-ssa-tail-merge.c:1430 0xa455ec tail_merge_optimize(unsigned int) ../../gcc-svn-src/gcc/tree-ssa-tail-merge.c:1634 0xa0b69c do_pre ../../gcc-svn-src/gcc/tree-ssa-pre.c:4754 Here is the program 5-min.c: struct { int f4; } g1; long g2; volatile long g3; void func_1 () { if (g2) g1 = g1; else g3; } void main () { } ^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug tree-optimization/56150] ICE segfault in do_pre / tail_merge_optimize 2013-01-30 14:44 [Bug tree-optimization/56150] New: ICE segfault in do_pre / tail_merge_optimize francesco.zappa.nardelli at gmail dot com @ 2013-01-30 14:45 ` francesco.zappa.nardelli at gmail dot com 2013-01-30 15:57 ` [Bug tree-optimization/56150] [4.8 Regression] " rguenth at gcc dot gnu.org ` (3 subsequent siblings) 4 siblings, 0 replies; 6+ messages in thread From: francesco.zappa.nardelli at gmail dot com @ 2013-01-30 14:45 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56150 --- Comment #1 from Francesco Zappa Nardelli <francesco.zappa.nardelli at gmail dot com> 2013-01-30 14:44:45 UTC --- Sorry, forgot to specify: Target: x86_64-unknown-linux-gnu ^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug tree-optimization/56150] [4.8 Regression] ICE segfault in do_pre / tail_merge_optimize 2013-01-30 14:44 [Bug tree-optimization/56150] New: ICE segfault in do_pre / tail_merge_optimize francesco.zappa.nardelli at gmail dot com 2013-01-30 14:45 ` [Bug tree-optimization/56150] " francesco.zappa.nardelli at gmail dot com @ 2013-01-30 15:57 ` rguenth at gcc dot gnu.org 2013-01-31 8:53 ` rguenth at gcc dot gnu.org ` (2 subsequent siblings) 4 siblings, 0 replies; 6+ messages in thread From: rguenth at gcc dot gnu.org @ 2013-01-30 15:57 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56150 Richard Biener <rguenth at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |ASSIGNED Last reconfirmed| |2013-01-30 AssignedTo|unassigned at gcc dot |rguenth at gcc dot gnu.org |gnu.org | Target Milestone|--- |4.8.0 Summary|ICE segfault in do_pre / |[4.8 Regression] ICE |tail_merge_optimize |segfault in do_pre / | |tail_merge_optimize Ever Confirmed|0 |1 --- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> 2013-01-30 15:56:27 UTC --- Confirmed. 1119 case GIMPLE_ASSIGN: 1120 lhs1 = gimple_get_lhs (s1); 1121 lhs2 = gimple_get_lhs (s2); 1122 if (gimple_vdef (s1)) 1123 { 1124 if (vn_valueize (gimple_vdef (s1)) != vn_valueize (gimple_vdef (s2))) s2 isn't a store. Index: gcc/tree-ssa-tail-merge.c =================================================================== --- gcc/tree-ssa-tail-merge.c (revision 195574) +++ gcc/tree-ssa-tail-merge.c (working copy) @@ -1121,6 +1121,8 @@ gimple_equal_p (same_succ same_succ, gim lhs2 = gimple_get_lhs (s2); if (gimple_vdef (s1)) { + if (!gimple_vdef (s2)) + return false; if (vn_valueize (gimple_vdef (s1)) != vn_valueize (gimple_vdef (s2))) return false; if (TREE_CODE (lhs1) != SSA_NAME fixes it. ^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug tree-optimization/56150] [4.8 Regression] ICE segfault in do_pre / tail_merge_optimize 2013-01-30 14:44 [Bug tree-optimization/56150] New: ICE segfault in do_pre / tail_merge_optimize francesco.zappa.nardelli at gmail dot com 2013-01-30 14:45 ` [Bug tree-optimization/56150] " francesco.zappa.nardelli at gmail dot com 2013-01-30 15:57 ` [Bug tree-optimization/56150] [4.8 Regression] " rguenth at gcc dot gnu.org @ 2013-01-31 8:53 ` rguenth at gcc dot gnu.org 2013-01-31 8:54 ` rguenth at gcc dot gnu.org 2013-01-31 9:17 ` rguenth at gcc dot gnu.org 4 siblings, 0 replies; 6+ messages in thread From: rguenth at gcc dot gnu.org @ 2013-01-31 8:53 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56150 --- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> 2013-01-31 08:53:03 UTC --- Author: rguenth Date: Thu Jan 31 08:52:56 2013 New Revision: 195608 URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=195608 Log: 2013-01-31 Richard Biener <rguenther@suse.de> PR tree-optimization/56150 * tree-ssa-tail-merge.c (gimple_equal_p): Properly handle mixed store non-store stmts. * gcc.dg/torture/pr56150.c: New testcase. Added: trunk/gcc/testsuite/gcc.dg/torture/pr56150.c Modified: trunk/gcc/ChangeLog trunk/gcc/testsuite/ChangeLog trunk/gcc/tree-ssa-tail-merge.c ^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug tree-optimization/56150] [4.8 Regression] ICE segfault in do_pre / tail_merge_optimize 2013-01-30 14:44 [Bug tree-optimization/56150] New: ICE segfault in do_pre / tail_merge_optimize francesco.zappa.nardelli at gmail dot com ` (2 preceding siblings ...) 2013-01-31 8:53 ` rguenth at gcc dot gnu.org @ 2013-01-31 8:54 ` rguenth at gcc dot gnu.org 2013-01-31 9:17 ` rguenth at gcc dot gnu.org 4 siblings, 0 replies; 6+ messages in thread From: rguenth at gcc dot gnu.org @ 2013-01-31 8:54 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56150 --- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> 2013-01-31 08:53:47 UTC --- Author: rguenth Date: Thu Jan 31 08:53:43 2013 New Revision: 195609 URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=195609 Log: 2013-01-31 Richard Biener <rguenther@suse.de> PR tree-optimization/56150 * tree-ssa-loop-manip.c (find_uses_to_rename_stmt): Do not visit virtual operands. (find_uses_to_rename_bb): Likewise. Modified: trunk/gcc/ChangeLog trunk/gcc/tree-ssa-loop-manip.c ^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug tree-optimization/56150] [4.8 Regression] ICE segfault in do_pre / tail_merge_optimize 2013-01-30 14:44 [Bug tree-optimization/56150] New: ICE segfault in do_pre / tail_merge_optimize francesco.zappa.nardelli at gmail dot com ` (3 preceding siblings ...) 2013-01-31 8:54 ` rguenth at gcc dot gnu.org @ 2013-01-31 9:17 ` rguenth at gcc dot gnu.org 4 siblings, 0 replies; 6+ messages in thread From: rguenth at gcc dot gnu.org @ 2013-01-31 9:17 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56150 Richard Biener <rguenth at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|ASSIGNED |RESOLVED Resolution| |FIXED --- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> 2013-01-31 09:16:47 UTC --- Fixed. ^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2013-01-31 9:17 UTC | newest] Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2013-01-30 14:44 [Bug tree-optimization/56150] New: ICE segfault in do_pre / tail_merge_optimize francesco.zappa.nardelli at gmail dot com 2013-01-30 14:45 ` [Bug tree-optimization/56150] " francesco.zappa.nardelli at gmail dot com 2013-01-30 15:57 ` [Bug tree-optimization/56150] [4.8 Regression] " rguenth at gcc dot gnu.org 2013-01-31 8:53 ` rguenth at gcc dot gnu.org 2013-01-31 8:54 ` rguenth at gcc dot gnu.org 2013-01-31 9:17 ` rguenth at gcc dot gnu.org
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