From c56db1005607c9d0fb552280c2065ecbe7bb2b23 Mon Sep 17 00:00:00 2001
From: Richard Biener <rguenth@gcc.gnu.org>
Date: Wed, 20 Jul 2011 13:36:30 +0000
Subject: [PATCH] re PR middle-end/18908 (Missed folding opportunities with
bools)
2011-07-20 Richard Guenther <rguenther@suse.de>
PR middle-end/18908
* tree.c (integer_all_onesp): Use TYPE_PRECISION, not mode precision.
* tree-ssa-forwprop.c (simplify_bitwise_binary): Remove bogus
ADDR_EXPR folding. Canonicalize X ^ ~0 as ~X.
* gcc.dg/tree-ssa/pr18908.c: New testcase.
* gcc.dg/tree-ssa/bitwise-sink.c: Adjust.
From-SVN: r176510
---
gcc/tree.c | 4 +---
1 file changed, 1 insertion(+), 3 deletions(-)
diff --git a/gcc/tree.c b/gcc/tree.c
index 8c44851a18b5..30ff80f152fa 100644
--- a/gcc/tree.c
+++ b/gcc/tree.c
@@ -1759,9 +1759,7 @@ integer_all_onesp (const_tree expr)
if (!uns)
return 0;
- /* Note that using TYPE_PRECISION here is wrong. We care about the
- actual bits, not the (arbitrary) range of the type. */
- prec = GET_MODE_BITSIZE (TYPE_MODE (TREE_TYPE (expr)));
+ prec = TYPE_PRECISION (TREE_TYPE (expr));
if (prec >= HOST_BITS_PER_WIDE_INT)
{
HOST_WIDE_INT high_value;
--
GitLab