subject:"\[Bug middle\-end\/59743\] \[4.9 Regression\] ICE\: Segmentation fault"

[Bug middle-end/59743] [4.9 Regression] ICE: Segmentation fault

2014-01-10 Thread law at redhat dot com

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59743 Jeffrey A. Law changed: What|Removed |Added Status|ASSIGNED|RESOLVED Resolution|---

[Bug middle-end/59743] [4.9 Regression] ICE: Segmentation fault

2014-01-10 Thread law at gcc dot gnu.org

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59743 --- Comment #12 from Jeffrey A. Law --- Author: law Date: Fri Jan 10 22:13:18 2014 New Revision: 206545 URL: http://gcc.gnu.org/viewcvs?rev=206545&root=gcc&view=rev Log: PR middle-end/59743 * ree.c (combine_reaching_defs): Ensure the defi

[Bug middle-end/59743] [4.9 Regression] ICE: Segmentation fault

2014-01-10 Thread law at redhat dot com

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59743 --- Comment #11 from Jeffrey A. Law --- Thanks. I'm still working through the RTL/source on the full testcase to see if there are any uninitialized uses. Regardless the patch I have here works for both the reduced and original testcase. I'll be

[Bug middle-end/59743] [4.9 Regression] ICE: Segmentation fault

2014-01-10 Thread jakub at gcc dot gnu.org

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59743 --- Comment #10 from Jakub Jelinek --- Ah, there is: /* If the df_live problem is not defined, such as at -O0 and -O1, we still need to keep the luids up to date. This is normally done in the df_live problem since this problem has a f

[Bug middle-end/59743] [4.9 Regression] ICE: Segmentation fault

2014-01-09 Thread law at redhat dot com

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59743 Jeffrey A. Law changed: What|Removed |Added Status|UNCONFIRMED |ASSIGNED Last reconfirmed|

[Bug middle-end/59743] [4.9 Regression] ICE: Segmentation fault

2014-01-09 Thread law at redhat dot com

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59743 --- Comment #8 from Jeffrey A. Law --- /* The logical uid of the insn in the basic block. This is valid after any call to df_analyze but may rot after insns are added, deleted or moved. */ int luid;

[Bug middle-end/59743] [4.9 Regression] ICE: Segmentation fault

2014-01-09 Thread jakub at gcc dot gnu.org

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59743 --- Comment #7 from Jakub Jelinek --- (In reply to Jeffrey A. Law from comment #5) > I think we can just check DF_INSN_LUIDs here to catch this case. My systems > are busy right now, but I should be able to nail this down as soon as one > frees u

[Bug middle-end/59743] [4.9 Regression] ICE: Segmentation fault

2014-01-09 Thread trippels at gcc dot gnu.org

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59743 --- Comment #6 from Markus Trippelsdorf --- Created attachment 31791 --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=31791&action=edit original testcase Here's the unreduced original.

[Bug middle-end/59743] [4.9 Regression] ICE: Segmentation fault

2014-01-09 Thread law at redhat dot com

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59743 --- Comment #5 from Jeffrey A. Law --- I think we can just check DF_INSN_LUIDs here to catch this case. My systems are busy right now, but I should be able to nail this down as soon as one frees up.

[Bug middle-end/59743] [4.9 Regression] ICE: Segmentation fault

2014-01-09 Thread law at redhat dot com

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59743 --- Comment #4 from Jeffrey A. Law --- I see what's going on. Basically the code exhibits undefined behaviour (r.s.high is not defined before its first use in the loop). Thus the first and only reaching def is appearing after the first use. Obv