[Bug tree-optimization/56539] [4.6/4.7/4.8 Regression] ICE: verify_ssa failed: caused by -foptimize-sibling-calls

["vchou79 at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56539

Vincent <vchou79 at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |vchou79 at gmail dot com

--- Comment #4 from Vincent <vchou79 at gmail dot com> 2013-03-05 21:14:04 UTC ---
bash-4.1$ x86_64-w64-mingw32-gcc -O2 t.c
t.c: In function 'main':
t.c:9:5: internal compiler error: Segmentation fault
 int main()
     ^
0x71fa65 crash_signal
        ../../gcc-4_8-trunk/gcc/toplev.c:332
0x748617 ssa_default_def(function*, tree_node*)
        ../../gcc-4_8-trunk/gcc/tree-dfa.c:310
0x748688 get_or_create_ssa_default_def(function*, tree_node*)
        ../../gcc-4_8-trunk/gcc/tree-dfa.c:362
0x760f7c get_reaching_def
        ../../gcc-4_8-trunk/gcc/tree-into-ssa.c:1155
0x76364b maybe_replace_use
        ../../gcc-4_8-trunk/gcc/tree-into-ssa.c:1772
0x76364b rewrite_update_stmt
        ../../gcc-4_8-trunk/gcc/tree-into-ssa.c:1955
0x76364b rewrite_update_enter_block
        ../../gcc-4_8-trunk/gcc/tree-into-ssa.c:2124
0xab5380 walk_dominator_tree(dom_walk_data*, basic_block_def*)
        ../../gcc-4_8-trunk/gcc/domwalk.c:187
0x761183 rewrite_blocks
        ../../gcc-4_8-trunk/gcc/tree-into-ssa.c:2204
0x7669bc update_ssa(unsigned int)
        ../../gcc-4_8-trunk/gcc/tree-into-ssa.c:3283
0xb371a4 tree_unroll_loops_completely(bool, bool)
        ../../gcc-4_8-trunk/gcc/tree-ssa-loop-ivcanon.c:1175
0x7d4c92 tree_complete_unroll_inner
        ../../gcc-4_8-trunk/gcc/tree-ssa-loop.c:511
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gcc version 4.8.0 20130305 (experimental) [gcc-4_8-trunk revision 196448]