From 5dfa45d043db04ebddf4081364661e0784304d39 Mon Sep 17 00:00:00 2001
From: Jakub Jelinek <jakub@redhat.com>
Date: Mon, 28 Jul 2003 17:42:24 +0200
Subject: configure.in (--enable-checking): Add fold category.

	* configure.in (--enable-checking): Add fold category.
	(ENABLE_FOLD_CHECKING): Define if requested.
	* configure: Rebuilt.
	* config.in: Rebuilt.
	* doc/install.texi: Document it.
	* fold-const.c: Include md5.h.
	[ENABLE_FOLD_CHECKING] (fold): Define to fold_1.
	[ENABLE_FOLD_CHECKING] (fold, fold_checksum_tree, fold_check_failed,
	print_fold_checksum): New functions.

	* fold-const.c (fold): Never modify argument passed to fold, instead
	change a copy and return it.
	* convert.c (convert_to_integer): Likewise.
testsuite/
	* gcc.c-torture/compile/20030725-1.c: New test.

From-SVN: r69886
---
 gcc/convert.c | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'gcc/convert.c')

diff --git a/gcc/convert.c b/gcc/convert.c
index fc001b6..5bab1c1 100644
--- a/gcc/convert.c
+++ b/gcc/convert.c
@@ -320,6 +320,7 @@ convert_to_integer (tree type, tree expr)
 
       if (TREE_CODE_CLASS (ex_form) == '<')
 	{
+	  expr = copy_node (expr);
 	  TREE_TYPE (expr) = type;
 	  return expr;
 	}
@@ -328,6 +329,7 @@ convert_to_integer (tree type, tree expr)
 	       || ex_form == TRUTH_OR_EXPR || ex_form == TRUTH_ORIF_EXPR
 	       || ex_form == TRUTH_XOR_EXPR)
 	{
+	  expr = copy_node (expr);
 	  TREE_OPERAND (expr, 0) = convert (type, TREE_OPERAND (expr, 0));
 	  TREE_OPERAND (expr, 1) = convert (type, TREE_OPERAND (expr, 1));
 	  TREE_TYPE (expr) = type;
@@ -336,6 +338,7 @@ convert_to_integer (tree type, tree expr)
 
       else if (ex_form == TRUTH_NOT_EXPR)
 	{
+	  expr = copy_node (expr);
 	  TREE_OPERAND (expr, 0) = convert (type, TREE_OPERAND (expr, 0));
 	  TREE_TYPE (expr) = type;
 	  return expr;
-- 
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