http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57584
Bug ID: 57584
Summary: ice: SSA corruption: Unable to coalesce ssa_names
Product: gcc
Version: 4.9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: dcb314 at hotmail dot com
Created attachment 30289
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=30289&action=edit
gzipped C source code
The attached source code causes the following crash
on gcc-4.9 trunk dated 20130605 on an AMD x86_64 box
when compiled with -O3.
Unable to coalesce ssa_names 45 and 3671 which are marked as MUST COALESCE.
sp_45(ab) and sp_3671(ab)
In file included from vm.c:661:0:
vm-engine.c: In function ‘vm_debug_engine’:
vm-engine.c:39:1: internal compiler error: SSA corruption
0x9ca5bf fail_abnormal_edge_coalesce
../../src/trunk/gcc/tree-ssa-coalesce.c:898
0x9ca5bf coalesce_partitions
../../src/trunk/gcc/tree-ssa-coalesce.c:1200
0x9ca5bf coalesce_ssa_name()
../../src/trunk/gcc/tree-ssa-coalesce.c:1337
0x981cee remove_ssa_form
../../src/trunk/gcc/tree-outof-ssa.c:900
0x981cee rewrite_out_of_ssa(ssaexpand*)
../../src/trunk/gcc/tree-outof-ssa.c:1133
0x60c694 gimple_expand_cfg
../../src/trunk/gcc/cfgexpand.c:4541
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://gcc.gnu.org/bugs.html> for instructions.
