[Bug tree-optimization/43107] New: [4.5 Regression] ICE: SIGSEGV with -O3 -mavx

[zsojka at seznam dot cz]

Command line:
gcc -O3 -mavx -c testcase.c

Tested revisions:
r156830 - crash
r156745 - crash
r156293 - crash
r155966 - OK (release checking)
r155609 - OK
r154830 - OK
r153685 - OK
4.4 r156256 - OK (with checking)
4.4 r153668 - OK

Valgrind output:
==1002== Command:
/mnt/svn/gcc-trunk/binary-156830-lto/libexec/gcc/x86_64-unknown-linux-gnu/4.5.0/cc1
-quiet testcase.c -quiet -dumpbase testcase.c -mavx -mtune=generic -auxbase
testcase -O3 -o /tmp/cc6y8iNe.s
==1002==
==1002== Invalid read of size 1
==1002==    at 0xBDB6AE: hash_rtx_cb (cse.c:2372)
==1002==    by 0xBE0C6C: cse_insn (cse.c:2581)
==1002==    by 0xBE3CF5: cse_main (cse.c:6352)
==1002==    by 0xBE435D: rest_of_handle_cse (cse.c:7241)
==1002==    by 0x72357A: execute_one_pass (passes.c:1561)
==1002==    by 0x723804: execute_pass_list (passes.c:1616)
==1002==    by 0x723816: execute_pass_list (passes.c:1617)
==1002==    by 0x819174: tree_rest_of_compilation (tree-optimize.c:413)
==1002==    by 0x99B1C0: cgraph_expand_function (cgraphunit.c:1545)
==1002==    by 0x99DBE4: cgraph_optimize (cgraphunit.c:1624)
==1002==    by 0x99E144: cgraph_finalize_compilation_unit (cgraphunit.c:1093)
==1002==    by 0x4B0332: c_write_global_declarations (c-decl.c:9506)
==1002==  Address 0xafafafaf00000006 is not stack'd, malloc'd or (recently)
free'd
==1002==
testcase.c: In function 'foo':
testcase.c:14:1: internal compiler error: Segmentation fault
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.


-- 
           Summary: [4.5 Regression] ICE: SIGSEGV with -O3 -mavx
           Product: gcc
           Version: 4.5.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: zsojka at seznam dot cz
  GCC host triplet: x86_64-pc-linux-gnu
GCC target triplet: x86_64-pc-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43107