[Bug tree-optimization/32694] New: [4.1/4.2 Regression] ICE in chain_of_csts_start

[jakub at gcc dot gnu dot org]

typedef signed long long int WordS64;
typedef unsigned long long int Word64;

int
foo (Word64 *p)
{
  while (1)
    {
      WordS64 c = 0x1llu;
      WordS64 x = *p;
      if (c >= 0)
        {
          if (x > (WordS64) 0x7FFFFFFFFFFFFFFFll - c)
            return 6;
        }
      else if (x < (WordS64) 0x8000000000000000ll - c)
        return 7;
      p++;
    }
}

ICEs at -O1 or -O2 in chain_of_csts_start, which is called on
 <nop_expr 0x2aaaae936d40
    type <integer_type 0x2aaaae93b790 long long int sizes-gimplified DI
        size <integer_cst 0x2aaaae92bdb0 constant invariant 64>
        unit size <integer_cst 0x2aaaae92bde0 constant invariant 8>
        align 64 symtab 0 alias set 3 precision 64 min <integer_cst
0x2aaaae92bf00 -9223372036854775808> max <integer_cst 0x2aaaae92bf30
9223372036854775807>
        pointer_to_this <pointer_type 0x2aaaae9e1840>>

    arg 0 <ssa_name 0x2aaaaeafb780
        type <integer_type 0x2aaaaeaf69a0 WordS64 sizes-gimplified public DI
size <integer_cst 0x2aaaae92bdb0 64> unit size <integer_cst 0x2aaaae92bde0 8>
            align 64 symtab 0 alias set -1 precision 64 min <integer_cst
0x2aaaae92bf00 -9223372036854775808> max <integer_cst 0x2aaaae92bf30
9223372036854775807>>
        var <var_decl 0x2aaaaeaf6d10 x> def_stmt <modify_expr 0x2aaaae931960>
        version 6>>
but assumes the argument is SSA_NAME.


-- 
           Summary: [4.1/4.2 Regression] ICE in chain_of_csts_start
           Product: gcc
           Version: 4.1.2
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: jakub at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32694