combine.c (simplify_if_then_else): Don't convert a == b ? b ...

	* combine.c (simplify_if_then_else): Don't convert a == b ? b : a
	to a if the comparison is floating mode and not -ffast-math.
	* simplify-rtx.c (simplify_ternary_operation): Likewise.

From-SVN: r36326

gcc/ChangeLog

+2000-09-11  Jakub Jelinek  <jakub@redhat.com>
+
+	* combine.c (simplify_if_then_else): Don't convert a == b ? b : a
+	to a if the comparison is floating mode and not -ffast-math.
+	* simplify-rtx.c (simplify_ternary_operation): Likewise.
+
 Mon Sep 11 20:07:48 2000  J"orn Rennecke <amylaar@redhat.co.uk>
 
 	* sh.h (INITIALIZE_TRAMPOLINE): Remove stray call to

gcc/combine.c

@@ -4703,10 +4703,12 @@ simplify_if_then_else (x)
 
   /* Convert a == b ? b : a to "a".  */
   if (true_code == EQ && ! side_effects_p (cond)
+      && (! FLOAT_MODE_P (mode) || flag_fast_math)
       && rtx_equal_p (XEXP (cond, 0), false)
       && rtx_equal_p (XEXP (cond, 1), true))
     return false;
   else if (true_code == NE && ! side_effects_p (cond)
+	   && (! FLOAT_MODE_P (mode) || flag_fast_math)
 	   && rtx_equal_p (XEXP (cond, 0), true)
 	   && rtx_equal_p (XEXP (cond, 1), false))
     return true;

gcc/simplify-rtx.c

@@ -1976,10 +1976,12 @@ simplify_ternary_operation (code, mode, op0_mode, op0, op1, op2)
 
       /* Convert a == b ? b : a to "a".  */
       if (GET_CODE (op0) == NE && ! side_effects_p (op0)
+	  && (! FLOAT_MODE_P (mode) || flag_fast_math)
 	  && rtx_equal_p (XEXP (op0, 0), op1)
 	  && rtx_equal_p (XEXP (op0, 1), op2))
 	return op1;
       else if (GET_CODE (op0) == EQ && ! side_effects_p (op0)
+	  && (! FLOAT_MODE_P (mode) || flag_fast_math)
 	  && rtx_equal_p (XEXP (op0, 1), op1)
 	  && rtx_equal_p (XEXP (op0, 0), op2))
 	return op2;