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* [Bug rtl-optimization/32747] New: [4.3 Regression] ICE segmentation fault or abort in combine on alpha @ 2007-07-12 23:10 belyshev at depni dot sinp dot msu dot ru 2007-07-13 8:26 ` [Bug rtl-optimization/32747] " belyshev at depni dot sinp dot msu dot ru ` (3 more replies) 0 siblings, 4 replies; 5+ messages in thread From: belyshev at depni dot sinp dot msu dot ru @ 2007-07-12 23:10 UTC (permalink / raw) To: gcc-bugs Testcase is as simple as this, compile with -O2 (can be triggered in a cross compiler): void foo (unsigned u) { if (u != 0x34303365) bar (); } Result may vary, either segfault in get_last_value_validate(), or ICE in copy_rtx, at rtl.c:314, or abort() in libc after free, depending on how compiler is invoked (from gdb or not), amount of enabled checking and host machine. -- Summary: [4.3 Regression] ICE segmentation fault or abort in combine on alpha Product: gcc Version: 4.3.0 Status: UNCONFIRMED Keywords: ice-on-valid-code, build Severity: normal Priority: P3 Component: rtl-optimization AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: belyshev at depni dot sinp dot msu dot ru GCC target triplet: alpha-unknown-linux-gnu http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32747 ^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug rtl-optimization/32747] [4.3 Regression] ICE segmentation fault or abort in combine on alpha 2007-07-12 23:10 [Bug rtl-optimization/32747] New: [4.3 Regression] ICE segmentation fault or abort in combine on alpha belyshev at depni dot sinp dot msu dot ru @ 2007-07-13 8:26 ` belyshev at depni dot sinp dot msu dot ru 2007-07-15 21:02 ` pinskia at gcc dot gnu dot org ` (2 subsequent siblings) 3 siblings, 0 replies; 5+ messages in thread From: belyshev at depni dot sinp dot msu dot ru @ 2007-07-13 8:26 UTC (permalink / raw) To: gcc-bugs ------- Comment #1 from belyshev at depni dot sinp dot msu dot ru 2007-07-13 08:26 ------- Broken by r126517: 2007-07-10 Ian Lance Taylor <iant@google.com> Replace no_new_pseudos in backends. ... -- belyshev at depni dot sinp dot msu dot ru changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |iant at google dot com http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32747 ^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug rtl-optimization/32747] [4.3 Regression] ICE segmentation fault or abort in combine on alpha 2007-07-12 23:10 [Bug rtl-optimization/32747] New: [4.3 Regression] ICE segmentation fault or abort in combine on alpha belyshev at depni dot sinp dot msu dot ru 2007-07-13 8:26 ` [Bug rtl-optimization/32747] " belyshev at depni dot sinp dot msu dot ru @ 2007-07-15 21:02 ` pinskia at gcc dot gnu dot org 2007-07-16 15:53 ` ian at airs dot com 2007-07-26 9:23 ` belyshev at depni dot sinp dot msu dot ru 3 siblings, 0 replies; 5+ messages in thread From: pinskia at gcc dot gnu dot org @ 2007-07-15 21:02 UTC (permalink / raw) To: gcc-bugs ------- Comment #2 from pinskia at gcc dot gnu dot org 2007-07-15 21:01 ------- This seems related to: http://gcc.gnu.org/ml/gcc-patches/2007-07/msg01379.html -- pinskia at gcc dot gnu dot org changed: What |Removed |Added ---------------------------------------------------------------------------- Target Milestone|--- |4.3.0 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32747 ^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug rtl-optimization/32747] [4.3 Regression] ICE segmentation fault or abort in combine on alpha 2007-07-12 23:10 [Bug rtl-optimization/32747] New: [4.3 Regression] ICE segmentation fault or abort in combine on alpha belyshev at depni dot sinp dot msu dot ru 2007-07-13 8:26 ` [Bug rtl-optimization/32747] " belyshev at depni dot sinp dot msu dot ru 2007-07-15 21:02 ` pinskia at gcc dot gnu dot org @ 2007-07-16 15:53 ` ian at airs dot com 2007-07-26 9:23 ` belyshev at depni dot sinp dot msu dot ru 3 siblings, 0 replies; 5+ messages in thread From: ian at airs dot com @ 2007-07-16 15:53 UTC (permalink / raw) To: gcc-bugs ------- Comment #3 from ian at airs dot com 2007-07-16 15:52 ------- The problem is that the reg_stat array in combine.c does not adjust when splitters create new pseudo-registers. I'm working on a patch to convert reg_stat to a VEC. -- ian at airs dot com changed: What |Removed |Added ---------------------------------------------------------------------------- CC|iant at google dot com |ian at airs dot com Status|UNCONFIRMED |NEW Ever Confirmed|0 |1 Last reconfirmed|0000-00-00 00:00:00 |2007-07-16 15:52:59 date| | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32747 ^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug rtl-optimization/32747] [4.3 Regression] ICE segmentation fault or abort in combine on alpha 2007-07-12 23:10 [Bug rtl-optimization/32747] New: [4.3 Regression] ICE segmentation fault or abort in combine on alpha belyshev at depni dot sinp dot msu dot ru ` (2 preceding siblings ...) 2007-07-16 15:53 ` ian at airs dot com @ 2007-07-26 9:23 ` belyshev at depni dot sinp dot msu dot ru 3 siblings, 0 replies; 5+ messages in thread From: belyshev at depni dot sinp dot msu dot ru @ 2007-07-26 9:23 UTC (permalink / raw) To: gcc-bugs ------- Comment #4 from belyshev at depni dot sinp dot msu dot ru 2007-07-26 09:23 ------- Fixed by: http://gcc.gnu.org/viewcvs?view=rev&revision=126942 r126942 | ian | 2007-07-26 04:27:34 +0400 (Thu, 26 Jul 2007) | 7 lines * combine.c (combine_max_regno): Remove. Remove all uses. (struct reg_stat_struct): Rename from struct reg_stat. (reg_stat_type): Define, and declare VECs. (reg_stat): Change from pointer to VEC. Change all uses. (combine_split_insns): New static function. (try_combine, find_split_point): Call it instead of split_insns. -- belyshev at depni dot sinp dot msu dot ru changed: What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |RESOLVED Resolution| |FIXED http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32747 ^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2007-07-26 9:23 UTC | newest] Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2007-07-12 23:10 [Bug rtl-optimization/32747] New: [4.3 Regression] ICE segmentation fault or abort in combine on alpha belyshev at depni dot sinp dot msu dot ru 2007-07-13 8:26 ` [Bug rtl-optimization/32747] " belyshev at depni dot sinp dot msu dot ru 2007-07-15 21:02 ` pinskia at gcc dot gnu dot org 2007-07-16 15:53 ` ian at airs dot com 2007-07-26 9:23 ` belyshev at depni dot sinp dot msu dot ru
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