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(expand_expr, case PLACEHOLDER_EXPR): Refine which object is picked. 

From-SVN: r13718
This commit is contained in:
Richard Kenner 1997-03-16 19:54:36 -05:00
parent ab16257805
commit dc500fa115
1 changed files with 24 additions and 13 deletions
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37
gcc/expr.c
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@ -5100,22 +5100,33 @@ expand_expr (exp, target, tmode, modifier)
further information, see tree.def. */
if (placeholder_list)
{
tree object;
tree need_type = TYPE_MAIN_VARIANT (type);
tree object = 0;
tree old_list = placeholder_list;
tree elt;
for (object = TREE_PURPOSE (placeholder_list);
(TYPE_MAIN_VARIANT (TREE_TYPE (object))
!= TYPE_MAIN_VARIANT (type))
&& (TREE_CODE_CLASS (TREE_CODE (object)) == 'r'
|| TREE_CODE_CLASS (TREE_CODE (object)) == '1'
|| TREE_CODE_CLASS (TREE_CODE (object)) == '2'
|| TREE_CODE_CLASS (TREE_CODE (object)) == 'e');
object = TREE_OPERAND (object, 0))
;
/* See if the object is the type that we want. Then see if
the operand of any reference is the type we want. */
if ((TYPE_MAIN_VARIANT (TREE_TYPE (TREE_PURPOSE (placeholder_list)))
== need_type))
object = TREE_PURPOSE (placeholder_list);
if (object != 0
&& (TYPE_MAIN_VARIANT (TREE_TYPE (object))
== TYPE_MAIN_VARIANT (type)))
/* Find the innermost reference that is of the type we want. */
for (elt = TREE_PURPOSE (placeholder_list);
elt != 0
&& (TREE_CODE_CLASS (TREE_CODE (elt)) == 'r'
|| TREE_CODE_CLASS (TREE_CODE (elt)) == '1'
|| TREE_CODE_CLASS (TREE_CODE (elt)) == '2'
|| TREE_CODE_CLASS (TREE_CODE (elt)) == 'e');
elt = ((TREE_CODE (elt) == COMPOUND_EXPR
|| TREE_CODE (elt) == COND_EXPR)
? TREE_OPERAND (elt, 1) : TREE_OPERAND (elt, 0)))
if (TREE_CODE_CLASS (TREE_CODE (elt)) == 'r'
&& (TYPE_MAIN_VARIANT (TREE_TYPE (TREE_OPERAND (elt, 0)))
== need_type))
object = TREE_OPERAND (elt, 0);
if (object != 0)
{
/* Expand this object skipping the list entries before
it was found in case it is also a PLACEHOLDER_EXPR.