[Bug tree-optimization/55008] New: Internal compiler error : verify_ssa failed

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

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55008

             Bug #: 55008
           Summary: Internal compiler error : verify_ssa failed
    Classification: Unclassified
           Product: gcc
           Version: 4.8.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: merkil@savhon.org


Hello !
The following testcase makes GCC 4.8.0 20121021 crash on my x86_64 machine (at
-O2 and higher) :

$ cat verify_ssa.c
#include <stdint.h>

void f(void)
{
    int a, *p;

    uint64_t b = 6309343725;

    if(*p ? (b = 1) : 0)
        if(b - (a = b /= 0) ? : (a + b))
            while(1);
}

$ xgcc -w -O2 verify_ssa.c
verify_ssa.c: In function âfâ:
verify_ssa.c:3:6: error: definition in block 3 follows the use
 void f(void)
      ^
for SSA_NAME: _12 in statement:
_12 = _12;
verify_ssa.c:3:6: internal compiler error: verify_ssa failed
linux-vdso.so.1: No such file or directory
0xa2cc93 verify_ssa(bool)
    ../../srcdir/gcc/tree-ssa.c:1052
0x82f7a2 execute_function_todo
    ../../srcdir/gcc/passes.c:1957
0x8304cd execute_todo
    ../../srcdir/gcc/passes.c:1989
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