gimple.c (walk_gimple_op): Do not request a pure rvalue on the RHS if the LHS is of a non-renamable type.

	* gimple.c (walk_gimple_op) <GIMPLE_ASSIGN>: Do not request a pure
	rvalue on the RHS if the LHS is of a non-renamable type.
	* tree-ssa-ccp.c (maybe_fold_offset_to_component_ref): Fold result.
ada/
	* gcc-interface/ada-tree.h (TYPE_BY_REFERENCE_P): Delete.
	(DECL_CONST_ADDRESS_P): New macro.
	(SET_DECL_ORIGINAL_FIELD_TO_FIELD): Likewise.
	(SAME_FIELD_P): Likewise.
	* gcc-interface/decl.c (constructor_address_p): New static function.
	(gnat_to_gnu_entity) <object>: Set DECL_CONST_ADDRESS_P according to
	the return value of above function.
	(gnat_to_gnu_entity) <E_Record_Type>: Force BLKmode for all types
	passed by reference.
	<E_Record_Subtype>: Likewise.
	Set TREE_ADDRESSABLE on the type if it passed by reference.
	(make_packable_type): Use SET_DECL_ORIGINAL_FIELD_TO_FIELD.
	(create_field_decl_from): Likewise.
	(substitute_in_type): Likewise.
	(purpose_member_field): Use SAME_FIELD_P.
	* gcc-interface/misc.c (must_pass_by_ref): Test TREE_ADDRESSABLE.
	* gcc-interface/trans.c (lvalue_required_p): Add ADDRESS_OF_CONSTANT
	parameter and adjust recursive calls.
	<N_Explicit_Dereference>: New case.
	<N_Object_Declaration>: Return 1 if the object is of a class-wide type.
	Adjust calls to lvalue_required_p.  Do not return the initializer of a
	DECL_CONST_ADDRESS_P constant if an lvalue is required for it.
	(call_to_gnu): Delay issuing error message for a misaligned actual and
	avoid the associated back-end assertion.  Test TREE_ADDRESSABLE.
	(gnat_gimplify_expr) <ADDR_EXPR>: Handle non-static constructors.
	* gcc-interface/utils.c (make_dummy_type): Set TREE_ADDRESSABLE if the
	type is passed by reference.
	(convert) <CONSTRUCTOR>: Convert in-place in more cases.
	* gcc-interface/utils2.c (build_cond_expr): Drop TYPE_BY_REFERENCE_P.
	(build_simple_component_ref): Use SAME_FIELD_P.

From-SVN: r158254

1 files changed, 3 insertions, 11 deletions

diff --git a/gcc/ada/gcc-interface/utils2.c b/gcc/ada/gcc-interface/utils2.c
index 7d78c25..dbe83ed 100644
--- a/gcc/ada/gcc-interface/utils2.c
+++ b/gcc/ada/gcc-interface/utils2.c
@@ -1293,10 +1293,9 @@ build_cond_expr (tree result_type, tree condition_operand,
 
   /* If the result type is unconstrained, take the address of the operands and
      then dereference the result.  Likewise if the result type is passed by
-     reference because creating a temporary of this type is not allowed.  */
+     reference, but this is natively handled in the gimplifier.  */
   if (TREE_CODE (result_type) == UNCONSTRAINED_ARRAY_TYPE
-      || CONTAINS_PLACEHOLDER_P (TYPE_SIZE (result_type))
-      || (AGGREGATE_TYPE_P (result_type) && TYPE_BY_REFERENCE_P (result_type)))
+      || CONTAINS_PLACEHOLDER_P (TYPE_SIZE (result_type)))
     {
       result_type = build_pointer_type (result_type);
       true_operand = build_unary_op (ADDR_EXPR, result_type, true_operand);
@@ -1588,22 +1587,15 @@ build_simple_component_ref (tree record_variable, tree component,
       tree new_field;
 
       /* First loop thru normal components.  */
-
       for (new_field = TYPE_FIELDS (record_type); new_field;
 	   new_field = TREE_CHAIN (new_field))
-	if (field == new_field
-	    || DECL_ORIGINAL_FIELD (new_field) == field
-	    || new_field == DECL_ORIGINAL_FIELD (field)
-	    || (DECL_ORIGINAL_FIELD (field)
-		&& (DECL_ORIGINAL_FIELD (field)
-		    == DECL_ORIGINAL_FIELD (new_field))))
+	if (SAME_FIELD_P (field, new_field))
 	  break;
 
       /* Next, loop thru DECL_INTERNAL_P components if we haven't found
          the component in the first search. Doing this search in 2 steps
          is required to avoiding hidden homonymous fields in the
          _Parent field.  */
-
       if (!new_field)
 	for (new_field = TYPE_FIELDS (record_type); new_field;
 	     new_field = TREE_CHAIN (new_field))