[Bug rtl-optimization/26855] New: ICE in add_deps_for_def with -fmodulo-sched -maltivec

["janis at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>]

GCC mainline gets an internal compiler error on powerpc-linux building HMMER
(http://hmmer.wustl.edu/) with "-O2 -fmodulo-sched -maltivec".  I'll attach a
minimized test case.  The failure is with trunk; 4.1 and 4.0 don't fail.

elm3b145% /opt/gcc-nightly/trunk/bin/gcc -O2 -fmodulo-sched -maltivec -c
hmmer.c                                                                         
hmmer.c: In function ?bar?:
hmmer.c:30: internal compiler error: in add_deps_for_def, at ddg.c:243
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://gcc.gnu.org/bugs.html> for instructions.

A regression hunt identified this patch:

http://gcc.gnu.org/viewcvs?view=rev&rev=110312

r110312 | zadeck | 2006-01-27 22:23:32 +0000 (Fri, 27 Jan 2006)


-- 
           Summary: ICE in add_deps_for_def with -fmodulo-sched -maltivec
           Product: gcc
           Version: 4.2.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: rtl-optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: janis at gcc dot gnu dot org
GCC target triplet: powerpc-unknown-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26855