gimplify.c (gimplify_conversion): Make sure that the result from…

gimplify.c (gimplify_conversion): Make sure that the result from maybe_fold_offset_to_reference is trivially...

2007-07-12  Richard Guenther  <rguenther@suse.de>

	* gimplify.c (gimplify_conversion): Make sure that the result
	from maybe_fold_offset_to_reference is trivially convertible
	to the desired type before doing the simplification.
	(gimplify_expr): Likewise.
	* fold-const.c (fold_binary): Use the correct types for
	building the simplified expression.

From-SVN: r126577

gcc/ChangeLog

+2007-07-12  Richard Guenther  <rguenther@suse.de>
+
+	* gimplify.c (gimplify_conversion): Make sure that the result
+	from maybe_fold_offset_to_reference is trivially convertible
+	to the desired type before doing the simplification.
+	(gimplify_expr): Likewise.
+	* fold-const.c (fold_binary): Use the correct types for
+	building the simplified expression.
+
 2007-07-12  Zdenek Dvorak  <dvorakz@suse.cz>
 
 	PR rtl-optimization/32729

gcc/fold-const.c

@@ -10271,7 +10271,7 @@ fold_binary (enum tree_code code, tree type, tree op0, tree op1)
       if (integer_zerop (arg1))
 	return non_lvalue (fold_convert (type, arg0));
       if (integer_all_onesp (arg1))
-	return fold_build1 (BIT_NOT_EXPR, type, arg0);
+	return fold_build1 (BIT_NOT_EXPR, type, op0);
       if (operand_equal_p (arg0, arg1, 0))
 	return omit_one_operand (type, integer_zero_node, arg0);
 
@@ -10865,7 +10865,8 @@ fold_binary (enum tree_code code, tree type, tree op0, tree op1)
 				    "when distributing negation across "
 				    "division"),
 				   WARN_STRICT_OVERFLOW_MISC);
-	  return fold_build2 (code, type, TREE_OPERAND (arg0, 0),
+	  return fold_build2 (code, type,
+			      fold_convert (type, TREE_OPERAND (arg0, 0)),
 			      negate_expr (arg1));
 	}
       if ((!INTEGRAL_TYPE_P (type) || TYPE_OVERFLOW_UNDEFINED (type))

gcc/gimplify.c

@@ -1648,7 +1648,11 @@ gimplify_conversion (tree *expr_p)
       && (tem = maybe_fold_offset_to_reference
 		  (TREE_OPERAND (*expr_p, 0),
 		   integer_zero_node, TREE_TYPE (TREE_TYPE (*expr_p)))))
-    *expr_p = build_fold_addr_expr_with_type (tem, TREE_TYPE (*expr_p));
+    {
+      tree ptr_type = build_pointer_type (TREE_TYPE (tem));
+      if (useless_type_conversion_p (TREE_TYPE (*expr_p), ptr_type))
+        *expr_p = build_fold_addr_expr_with_type (tem, ptr_type);
+    }
 
   /* If we still have a conversion at the toplevel,
      then canonicalize some constructs.  */
@@ -5987,9 +5991,12 @@ gimplify_expr (tree *expr_p, tree *pre_p, tree *post_p,
 			 (TREE_OPERAND (*expr_p, 0), TREE_OPERAND (*expr_p, 1),
 		   	  TREE_TYPE (TREE_TYPE (*expr_p)))))
 	     {
-               *expr_p = build_fold_addr_expr_with_type (tmp,
-							 TREE_TYPE (*expr_p));
-	       break;
+	       tree ptr_type = build_pointer_type (TREE_TYPE (tmp));
+	       if (useless_type_conversion_p (TREE_TYPE (*expr_p), ptr_type))
+		 {
+                   *expr_p = build_fold_addr_expr_with_type (tmp, ptr_type);
+		   break;
+		 }
 	     }
 	  /* Convert (void *)&a + 4 into (void *)&a[1].  */
 	  if (TREE_CODE (TREE_OPERAND (*expr_p, 0)) == NOP_EXPR