From fd2ce42712717e13ab2dd0a9568284546698d902 Mon Sep 17 00:00:00 2001
From: dje <dje@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Fri, 13 Jul 2001 15:05:51 +0000
Subject: [PATCH] * combine.c (try_combine): Ensure const_int pow2 is
positive.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@43983 138bc75d-0d04-0410-961f-82ee72b054a4
---
gcc/ChangeLog | 4 ++++
gcc/combine.c | 1 +
2 files changed, 5 insertions(+)
diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index c80f159db843..57ea335d5c01 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,7 @@
+2001-07-13 David Edelsohn <edelsohn@gnu.org>
+
+ * combine.c (try_combine): Ensure const_int pow2 is positive.
+
2001-07-13 Hartmut Penner <hpenner@de.ibm.com>
* config.gcc: Add configuration for s/390.
diff --git a/gcc/combine.c b/gcc/combine.c
index 6972d85fc094..2557d7583676 100644
--- a/gcc/combine.c
+++ b/gcc/combine.c
@@ -2235,6 +2235,7 @@ try_combine (i3, i2, i1, new_direct_jump_p)
appeared to be a memory address. This is a kludge. */
if (split_code == MULT
&& GET_CODE (XEXP (*split, 1)) == CONST_INT
+ && INTVAL (XEXP (*split, 1)) > 0
&& (i = exact_log2 (INTVAL (XEXP (*split, 1)))) >= 0)
{
SUBST (*split, gen_rtx_ASHIFT (split_mode,
--
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