From cd7ec127de787ff770410b2f7380a4acfbeae84c Mon Sep 17 00:00:00 2001
From: "J\"orn Rennecke" <joern.rennecke@st.com>
Date: Mon, 31 Oct 2005 13:30:14 +0000
Subject: [PATCH] optabs.c (expand_unop): Take TRULY_NOOP_TRUNCATION into
account.
2005-10-31 J"orn Rennecke <joern.rennecke@st.com>
* optabs.c (expand_unop): Take TRULY_NOOP_TRUNCATION into account.
From-SVN: r106271
---
gcc/ChangeLog | 4 ++++
gcc/optabs.c | 4 +++-
2 files changed, 7 insertions(+), 1 deletion(-)
diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 6e274dafd73f..cd55c36ff127 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,7 @@
+2005-10-31 J"orn Rennecke <joern.rennecke@st.com>
+
+ * optabs.c (expand_unop): Take TRULY_NOOP_TRUNCATION into account.
+
2005-10-31 Andrew Pinski <pinskia@physics.uc.edu>
PR middle-end/23492
diff --git a/gcc/optabs.c b/gcc/optabs.c
index c043bb0c32be..d3e1db69eddb 100644
--- a/gcc/optabs.c
+++ b/gcc/optabs.c
@@ -2434,7 +2434,9 @@ expand_unop (enum machine_mode mode, optab unoptab, rtx op0, rtx target,
if (temp)
{
- if (class != MODE_INT)
+ if (class != MODE_INT
+ || !TRULY_NOOP_TRUNCATION (GET_MODE_BITSIZE (mode),
+ GET_MODE_BITSIZE (wider_mode)))
{
if (target == 0)
target = gen_reg_rtx (mode);
--
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