re PR middle-end/49177 (FAIL: gcc.dg/vect/fast-math-ifcvt-1.c)

2011-05-27  Richard Guenther  <rguenther@suse.de>

	PR middle-end/49177
	* fold-const.c (fold_unary_loc): Fold (T)(A CMP B) to
	A CMP B ? (T) true : (T) false for non-integral types T again.

From-SVN: r174326

gcc/ChangeLog

+2011-05-27  Richard Guenther  <rguenther@suse.de>
+
+	PR middle-end/49177
+	* fold-const.c (fold_unary_loc): Fold (T)(A CMP B) to
+	A CMP B ? (T) true : (T) false for non-integral types T again.
+
 2011-05-27  Jan Hubicka  <jh@suse.cz>
 
 	* lto-streamer-out.c (lto_string_index): break out from...; offset by 1
 	so 0 means NULL string.
 	(lto_output_string_with_length): ... here.
-	(lto_output_string, output_string_cst, output_identifier): Update handling
-	of NULL strings.
+	(lto_output_string, output_string_cst, output_identifier): Update
+	handling of NULL strings.
 	(lto_output_location_bitpack): New function.
 	(lto_output_location): Use it.
 	(lto_output_tree_ref): Use output_record_start.
-	(pack_ts_type_common_value_fields): Pack aliagn & alias set in var len values.
-	* lto-streamer-in.c (string_for_index): Break out from ...; offset values by 1.
+	(pack_ts_type_common_value_fields): Pack aliagn & alias set in var
+	len values.
+	* lto-streamer-in.c (string_for_index): Break out from ...; offset
+	values by 1.
 	(input_string_internal): ... here; 
-	(input_string_cst, input_identifier, lto_input_string): Update handling of
-	NULL strings.
+	(input_string_cst, input_identifier, lto_input_string): Update handling
+	of NULL strings.
 	(lto_input_location_bitpack): New function
 	(lto_input_location): Use it.
-	(unpack_ts_type_common_value_fields): Pack align & alias in var len values.
+	(unpack_ts_type_common_value_fields): Pack align & alias in var len
+	values.
 	* lto-streamer.h (bp_pack_val_len_unsigned, bp_pack_val_len_int,
 	bp_unpack_val_len_unsigned, bp_unpack_val_len_int): Declare.
 	(bp_pack_value): Sanity check the value range.

gcc/fold-const.c

@@ -7657,11 +7657,19 @@ fold_unary_loc (location_t loc, enum tree_code code, tree type, tree op0)
       if (TREE_TYPE (op0) == type)
 	return op0;
 
+      if (COMPARISON_CLASS_P (op0))
+	{
 	  /* If we have (type) (a CMP b) and type is an integral type, return
 	     new expression involving the new type.  */
-      if (COMPARISON_CLASS_P (op0) && INTEGRAL_TYPE_P (type))
-	return fold_build2_loc (loc, TREE_CODE (op0), type, TREE_OPERAND (op0, 0),
+	  if (INTEGRAL_TYPE_P (type))
+	    return fold_build2_loc (loc, TREE_CODE (op0), type,
+				    TREE_OPERAND (op0, 0),
 				    TREE_OPERAND (op0, 1));
+	  else
+	    return fold_build3_loc (loc, COND_EXPR, type, op0,
+				    fold_convert (type, boolean_true_node),
+				    fold_convert (type, boolean_false_node));
+	}
 
       /* Handle cases of two conversions in a row.  */
       if (CONVERT_EXPR_P (op0))