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gimplify.c (maybe_with_size_expr): If already have WITH_SIZE_EXPR, don't make another one.

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* gimplify.c (maybe_with_size_expr): If already have WITH_SIZE_EXPR,
	don't make another one.

From-SVN: r85249
This commit is contained in:
Richard Kenner 2004-07-28 02:57:25 +00:00 committed by Richard Kenner
parent ce961468b7
commit 61025d1b36
2 changed files with 18 additions and 10 deletions
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gcc/ChangeLog
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@ -1,5 +1,8 @@
2004-07-27 Richard Kenner <kenner@vlsi1.ultra.nyu.edu>
* gimplify.c (maybe_with_size_expr): If already have WITH_SIZE_EXPR,
don't make another one.
PR optimization/15077
* function.h (struct function): Add field saved_static_chain_decl.
Fix comment for static_chain_decl.

25
gcc/gimplify.c
View File

@ -1746,20 +1746,25 @@ gimplify_self_mod_expr (tree *expr_p, tree *pre_p, tree *post_p,
static void
maybe_with_size_expr (tree *expr_p)
{
tree expr, type, size;
tree expr = *expr_p;
tree type = TREE_TYPE (expr);
tree size;
expr = *expr_p;
type = TREE_TYPE (expr);
if (type == error_mark_node)
/* If we've already wrapped this or the type is error_mark_node, we can't do
anything. */
if (TREE_CODE (expr) == WITH_SIZE_EXPR
|| type == error_mark_node)
return;
/* If the size isn't known or is a constant, we have nothing to do. */
size = TYPE_SIZE_UNIT (type);
if (size && TREE_CODE (size) != INTEGER_CST)
{
size = unshare_expr (size);
size = SUBSTITUTE_PLACEHOLDER_IN_EXPR (size, expr);
*expr_p = build2 (WITH_SIZE_EXPR, type, expr, size);
}
if (!size || TREE_CODE (size) == INTEGER_CST)
return;
/* Otherwise, make a WITH_SIZE_EXPR. */
size = unshare_expr (size);
size = SUBSTITUTE_PLACEHOLDER_IN_EXPR (size, expr);
*expr_p = build2 (WITH_SIZE_EXPR, type, expr, size);
}
/* Subroutine of gimplify_call_expr: Gimplify a single argument. */