[Bug rtl-optimization/46114] [4.6 regression] g++ SEGV when built with gld on Solaris 10+/x86
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46114 --- Comment #15 from Bernd Schmidt bernds at gcc dot gnu.org 2010-11-25 16:05:36 UTC --- Can you go back to the failing sources and test whether http://gcc.gnu.org/ml/gcc-patches/2010-10/msg02569.html fixes the problem? For future bug reports, please use gcc -v -save-temps, then post the preprocessed source and the exact options that were passed to cc1. I've managed to reproduce the code generation, but only with an explicit -march=i686 which required some guessing.
[Bug rtl-optimization/46114] [4.6 regression] g++ SEGV when built with gld on Solaris 10+/x86
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46114 --- Comment #16 from ro at CeBiTec dot Uni-Bielefeld.DE ro at CeBiTec dot Uni-Bielefeld.DE 2010-11-25 16:25:35 UTC --- --- Comment #15 from Bernd Schmidt bernds at gcc dot gnu.org 2010-11-25 16:05:36 UTC --- Can you go back to the failing sources and test whether http://gcc.gnu.org/ml/gcc-patches/2010-10/msg02569.html fixes the problem? Looks good indeed. I didn't try a full bootstrap but just up to the point where g++ failed before. For future bug reports, please use gcc -v -save-temps, then post the preprocessed source and the exact options that were passed to cc1. I've managed to reproduce the code generation, but only with an explicit -march=i686 which required some guessing. Ok, will do. Thanks for fixing this. Rainer
[Bug rtl-optimization/46114] [4.6 regression] g++ SEGV when built with gld on Solaris 10+/x86
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46114 Steven Bosscher steven at gcc dot gnu.org changed: What|Removed |Added Status|WAITING |RESOLVED CC||steven at gcc dot gnu.org Resolution||FIXED --- Comment #14 from Steven Bosscher steven at gcc dot gnu.org 2010-11-08 07:30:47 UTC --- Fixed by the commit that reverted bernds' patch.
[Bug rtl-optimization/46114] [4.6 regression] g++ SEGV when built with gld on Solaris 10+/x86
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46114 --- Comment #13 from ro at CeBiTec dot Uni-Bielefeld.DE ro at CeBiTec dot Uni-Bielefeld.DE 2010-11-04 18:48:46 UTC --- --- Comment #12 from H.J. Lu hjl.tools at gmail dot com 2010-11-03 17:10:07 UTC --- Please try revision 166259. As expected, the reversion fixes the testcase. A full bootstrap with CVS gas and gld is currently running, and g++ is already running successfully. Rainer
[Bug rtl-optimization/46114] [4.6 regression] g++ SEGV when built with gld on Solaris 10+/x86
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46114 Richard Guenther rguenth at gcc dot gnu.org changed: What|Removed |Added Target Milestone|--- |4.6.0
[Bug rtl-optimization/46114] [4.6 regression] g++ SEGV when built with gld on Solaris 10+/x86
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46114 H.J. Lu hjl.tools at gmail dot com changed: What|Removed |Added Status|NEW |WAITING --- Comment #12 from H.J. Lu hjl.tools at gmail dot com 2010-11-03 17:10:07 UTC --- Please try revision 166259.
[Bug rtl-optimization/46114] [4.6 regression] g++ SEGV when built with gld on Solaris 10+/x86
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46114 --- Comment #7 from Rainer Orth ro at gcc dot gnu.org 2010-10-22 10:09:26 UTC --- Created attachment 22113 -- http://gcc.gnu.org/bugzilla/attachment.cgi?id=22113 working assembler output
[Bug rtl-optimization/46114] [4.6 regression] g++ SEGV when built with gld on Solaris 10+/x86
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46114 --- Comment #8 from Rainer Orth ro at gcc dot gnu.org 2010-10-22 10:10:13 UTC --- Created attachment 22114 -- http://gcc.gnu.org/bugzilla/attachment.cgi?id=22114 miscompiled assembler output
[Bug rtl-optimization/46114] [4.6 regression] g++ SEGV when built with gld on Solaris 10+/x86
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46114 --- Comment #9 from ro at CeBiTec dot Uni-Bielefeld.DE ro at CeBiTec dot Uni-Bielefeld.DE 2010-10-22 10:15:20 UTC --- --- Comment #6 from Bernd Schmidt bernds at gcc dot gnu.org 2010-10-21 23:33:47 UTC --- I'm assuming you run the testcase on Solaris? Can you provide good/bad assembly output? Sure, both attached. Each of them was compiled with gcc -g -O2 -S. As could be expected, the bug has nothing to do with wether or nor gld is in use, only with the details of the input. It can be reproduced with a gcc configured to use Sun as and ld instead of gas and gld. The attached -S output is for a compiler configured to use CVS gas and gld, though. The bad one is from r164552 (your patch), the good one from r164551 (the last working rev). Thanks. Rainer
[Bug rtl-optimization/46114] [4.6 regression] g++ SEGV when built with gld on Solaris 10+/x86
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46114 Bernd Schmidt bernds at gcc dot gnu.org changed: What|Removed |Added CC||bernds at gcc dot gnu.org --- Comment #10 from Bernd Schmidt bernds at gcc dot gnu.org 2010-10-22 13:24:53 UTC --- I'll also need preprocessed source since I'm lacking Solaris includes. I'll be away for a few weeks so there might be no progress on this bug during that time.
[Bug rtl-optimization/46114] [4.6 regression] g++ SEGV when built with gld on Solaris 10+/x86
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46114 --- Comment #11 from ro at CeBiTec dot Uni-Bielefeld.DE ro at CeBiTec dot Uni-Bielefeld.DE 2010-10-22 13:35:08 UTC --- --- Comment #10 from Bernd Schmidt bernds at gcc dot gnu.org 2010-10-22 13:24:53 UTC --- I'll also need preprocessed source since I'm lacking Solaris includes. I'll be away for a few weeks so there might be no progress on this bug during that time. It should suffice to replace the includes with declarations of size_t, abort, calloc, malloc, strcmp, and strlen in pr46114.c: typedef unsigned int size_t; extern void abort(void); extern void *calloc(size_t, size_t); extern void *malloc(size_t); extern int strcmp(const char *, const char *); extern size_t strlen(const char *); I've replaced those by the corresponding includes so one can compile and run the testcase on other platforms. I'll be away until next tuesday myself and won't be reading email during that time. I very much hope this can be fixed before 4.6.0 is released. Rainer
[Bug rtl-optimization/46114] [4.6 regression] g++ SEGV when built with gld on Solaris 10+/x86
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46114 --- Comment #1 from Rainer Orth ro at gcc dot gnu.org 2010-10-21 20:31:57 UTC --- Created attachment 22109 -- http://gcc.gnu.org/bugzilla/attachment.cgi?id=22109 main program of testcase
[Bug rtl-optimization/46114] [4.6 regression] g++ SEGV when built with gld on Solaris 10+/x86
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46114 --- Comment #2 from Rainer Orth ro at gcc dot gnu.org 2010-10-21 20:32:47 UTC --- Created attachment 22110 -- http://gcc.gnu.org/bugzilla/attachment.cgi?id=22110 miscompiled part of the test
[Bug rtl-optimization/46114] [4.6 regression] g++ SEGV when built with gld on Solaris 10+/x86
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46114 Rainer Orth ro at gcc dot gnu.org changed: What|Removed |Added Status|UNCONFIRMED |NEW Last reconfirmed||2010.10.21 20:36:21 Ever Confirmed|0 |1 --- Comment #3 from Rainer Orth ro at gcc dot gnu.org 2010-10-21 20:36:21 UTC --- I could reproduce the bug with the attached testcase (go.c with main, pr46114.c reduced from g++spec.c). Compile with % gcc -O2 -o go go.c pr46114.c After the culprit patch, the program prints opt_index = 902 arg = 8049253 value = 1 lang_mask = 65536 decoded = 1 opt_index = 902 arg = 8049264 value = 1 lang_mask = 65536 decoded = 804a90c opt_index = 1019 arg = 0 value = 1 lang_mask = 65536 decoded = 804a938 i.e. decoded (a pointer) is invalid. Before, one gets opt_index = 902 arg = 8049273 value = 1 lang_mask = 65536 decoded = 804a900 opt_index = 902 arg = 8049284 value = 1 lang_mask = 65536 decoded = 804a92c opt_index = 1019 arg = 0 value = 1 lang_mask = 65536 decoded = 804a958 The bug is extremely sensitive to the details of the input, so I didn't try to reduce it further. Please fix, this is really ugly and makes gcc with gld completely useless.
[Bug rtl-optimization/46114] [4.6 regression] g++ SEGV when built with gld on Solaris 10+/x86
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46114 H.J. Lu hjl.tools at gmail dot com changed: What|Removed |Added CC||hjl.tools at gmail dot com --- Comment #4 from H.J. Lu hjl.tools at gmail dot com 2010-10-21 20:41:06 UTC --- Can you try http://gcc.gnu.org/ml/gcc-patches/2010-10/msg01858.html
[Bug rtl-optimization/46114] [4.6 regression] g++ SEGV when built with gld on Solaris 10+/x86
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46114 --- Comment #5 from ro at CeBiTec dot Uni-Bielefeld.DE ro at CeBiTec dot Uni-Bielefeld.DE 2010-10-21 20:57:42 UTC --- --- Comment #4 from H.J. Lu hjl.tools at gmail dot com 2010-10-21 20:41:06 UTC --- Can you try http://gcc.gnu.org/ml/gcc-patches/2010-10/msg01858.html Doesn't make a difference unfortunately. Thanks. Rainer
[Bug rtl-optimization/46114] [4.6 regression] g++ SEGV when built with gld on Solaris 10+/x86
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46114 --- Comment #6 from Bernd Schmidt bernds at gcc dot gnu.org 2010-10-21 23:33:47 UTC --- I'm assuming you run the testcase on Solaris? Can you provide good/bad assembly output?
