From: J"orn Rennecke <joern.rennecke@st.com>
Date: Mon, 31 Oct 2005 13:30:14 +0000 (+0000)
Subject: optabs.c (expand_unop): Take TRULY_NOOP_TRUNCATION into account.
X-Git-Tag: releases/gcc-4.1.0~1141
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=cd7ec127de787ff770410b2f7380a4acfbeae84c;p=thirdparty%2Fgcc.git

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
---

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);