[Bug middle-end/55130] New: [4.8 Regression] ICE in insn_rhs_dead_pseudo_p, at lra-constraints.c:3224

[d.g.gorbachev at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55130

             Bug #: 55130
           Summary: [4.8 Regression] ICE in insn_rhs_dead_pseudo_p, at
                    lra-constraints.c:3224
    Classification: Unclassified
           Product: gcc
           Version: 4.8.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: middle-end
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: d.g.gorbachev@gmail.com


GCC 4.8.0 20121028 (experimental).

cat > bug.c
extern void bar(long long);

int foo(long long a, char b, long long c, long long d)
{
  if (c == 0)
    c = d;

  bar(b + c);

  return a == d;
}
^D
$ gcc -O1 -mregparm=3 -mpreferred-stack-boundary=2 -S bug.c
bug.c: In function 'foo':
bug.c:11:1: internal compiler error: in insn_rhs_dead_pseudo_p, at
lra-constraints.c:3224
 }
 ^
0x84c80c9 insn_rhs_dead_pseudo_p
    ../../gcc-4.8/gcc/lra-constraints.c:3224
0x84c810c init_insn_rhs_dead_pseudo_p
    ../../gcc-4.8/gcc/lra-constraints.c:3240
0x84ce811 lra_constraints(bool)
    ../../gcc-4.8/gcc/lra-constraints.c:3301
0x84c306e lra(_IO_FILE*)
    ../../gcc-4.8/gcc/lra.c:2281
0x848e42e do_reload
    ../../gcc-4.8/gcc/ira.c:4624
0x848e5fb rest_of_handle_reload
    ../../gcc-4.8/gcc/ira.c:4736
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