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Re: [PATCH] Overhaul __builtin_constant_p processing

Roger,

Here's a testcase which fails to compile with your __builtin_constant_p
overhual patch installed distilled from gdb/f-exp.tab.c

Your patch causes gcse.c:find_avail_set to loop forever on x86 at -O2.
I haven't analysed why it's looping yet.

-------------------------------------------------------------
static int parse_number (int);

static int
parse_number (int c)
{
  c = ({
        int __res;
        if (__builtin_constant_p (c))
          __res = c;
        __res;
       });

  return 257;
}
---------------------------------------------------------------

Cheers
Graham
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