From: Richard Sandiford <rdsandiford@googlemail.com>
Date: Sun, 18 Nov 2012 17:32:04 +0000 (+0000)
Subject: combine.c (make_extraction): Handle TRUNCATEd INNERs.
X-Git-Tag: releases/gcc-4.8.0~1939
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=6cf9964974d79779456b9cde3c3949d056745540;p=thirdparty%2Fgcc.git

combine.c (make_extraction): Handle TRUNCATEd INNERs.

gcc/
	* combine.c (make_extraction): Handle TRUNCATEd INNERs.

From-SVN: r193600
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index b9d7a75653fc..a64c25f8cbb7 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,7 @@
+2012-11-18  Richard Sandiford  <rdsandiford@googlemail.com>
+
+	* combine.c (make_extraction): Handle TRUNCATEd INNERs.
+
 2012-11-18  Richard Sandiford  <rdsandiford@googlemail.com>
 
 	* expr.c (expand_assignment): Don't set MEM_KEEP_ALIAS_SET_P here.
diff --git a/gcc/combine.c b/gcc/combine.c
index 5bf08ff2fb6d..a3583e2013ad 100644
--- a/gcc/combine.c
+++ b/gcc/combine.c
@@ -7022,6 +7022,8 @@ make_extraction (enum machine_mode mode, rtx inner, HOST_WIDE_INT pos,
       if (new_rtx != 0)
 	return gen_rtx_ASHIFT (mode, new_rtx, XEXP (inner, 1));
     }
+  else if (GET_CODE (inner) == TRUNCATE)
+    inner = XEXP (inner, 0);
 
   inner_mode = GET_MODE (inner);