http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57349
Bug ID: 57349
Summary: ICE on 253.perlbmk with pgo after r198096
Product: gcc
Version: 4.9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: izamyatin at gmail dot com
CC: rguenther at suse dot de
Target: x86
Output:
gcc -c -o perl.o -DSPEC_CPU2000_LP64 -DSPEC_CPU2000_LINUX_I386
-DSPEC_CPU2000_NEED_BOOL -DSPEC_CPU2000_GLIBC22 -fprofile-use -O3
-ffast-math -funroll-loops perl.c
Error from fdo_make_pass2 'specmake FDO=PASS2 build > fdo_make_pass2.out 2>
fdo_make_pass2.err':
Unable to coalesce ssa_names 1 and 7 which are marked as MUST COALESCE.
argc_1(ab) and argc_7(ab)
perl.c: In function 'perl_parse':
perl.c:630:1: internal compiler error: SSA corruption
perl_parse(PerlInterpreter *sv_interp, void (*xsinit) (void), int argc, char
**argv, char **env)
^
0x9c56dd fail_abnormal_edge_coalesce
../../gcc/tree-ssa-coalesce.c:898
0x9c56dd coalesce_partitions
../../gcc/tree-ssa-coalesce.c:1200
0x9c56dd coalesce_ssa_name()
../../gcc/tree-ssa-coalesce.c:1337
0x97eaff remove_ssa_form
../../gcc/tree-outof-ssa.c:900
0x97eaff rewrite_out_of_ssa(ssaexpand*)
../../gcc/tree-outof-ssa.c:1133
0x5fdeca gimple_expand_cfg
../../gcc/cfgexpand.c:4541
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with preprocessed source if appropriate.
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specmake: *** [perl.o] Error 1
Issue seems related to http://gcc.gnu.org/ml/gcc/2013-05/msg00162.html.
although I haven't managed to make reproducer so far
