re PR middle-end/34627 (Incorrect branching with -Ox on hppa)

	PR middle-end/34627
	combine.c (simplify_if_then_else): Make sure the comparison is
	against const0_rtx when simplifying to (abs x) or (neg (abs X)).

From-SVN: r132193

gcc/ChangeLog

+2008-02-08  Steven Bosscher  <stevenb.gcc@gmail.com>
+
+	PR middle-end/34627
+	combine.c (simplify_if_then_else): Make sure the comparison is
+	against const0_rtx when simplifying to (abs x) or (neg (abs X)).
+
 2008-02-08  Richard Sandiford  <rsandifo@nildram.co.uk>
 
 	PR bootstrap/35051

gcc/combine.c

@@ -5393,9 +5393,10 @@ simplify_if_then_else (rtx x)
   /* Look for cases where we have (abs x) or (neg (abs X)).  */
 
   if (GET_MODE_CLASS (mode) == MODE_INT
+      && comparison_p
+      && XEXP (cond, 1) == const0_rtx
       && GET_CODE (false_rtx) == NEG
       && rtx_equal_p (true_rtx, XEXP (false_rtx, 0))
-      && comparison_p
       && rtx_equal_p (true_rtx, XEXP (cond, 0))
       && ! side_effects_p (true_rtx))
     switch (true_code)