[committed] Fix PR rtl-opt/20412, ICE in combine

[Andrew Pinski <pinskia at physics dot uc dot edu>]

The problem here was a typo when simplify_relational_operation_1 was 
split
out of simplify_relational_operation.  This patch fixes that simple copy
and pasto.  I applied this to both the mainline and 4.0 branch as 
obvious
after a bootstrap and test on powerpc-darwin.

Thanks,
Andrew Pinski

ChangeLog:
	PR rtl-opt/20412
	* simplify-rtx.c (simplify_relational_operation_1): Fix typo - check 
the
	correct mode.

	PR rtl-opt/20412
	* gcc.c-torture/compile/pr20412.c: New test.

Attachment: fixPR20412.diff.txt
Description: Text document

testcase:
int
foo(void)
{
  int      a,b,g;
  int      i,len;
  int      stop;

  len = 10;
  stop = 0;
  for (i=0; i<len; i++)
  {
    a = bar1() ? 0 : 1;
    b = bar2() ? 0 : 1;
    g = bar3() ? 0 : 1;

    if (stop = ((a+b) % 2 != g)) break;
  }

  return stop;
}