From: Jan Hubicka <hubicka@ucw.cz>
Date: Thu, 6 Oct 2016 13:45:45 +0000 (+0200)
Subject: postreload.c (reload_cse_simplify): Skip also USE when detecting noop move.
X-Git-Tag: upstream/12.2.0~44317
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=c6a2617973f6e7d1359a08b941c27c6d5287563b;p=platform%2Fupstream%2Fgcc.git

postreload.c (reload_cse_simplify): Skip also USE when detecting noop move.

	* postreload.c (reload_cse_simplify): Skip also USE when detecting
	noop move.

From-SVN: r240833
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index cf7505c..3799db0 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2016-10-06  Jan Hubicka  <hubicka@ucw.cz>
+
+	* postreload.c (reload_cse_simplify): Skip also USE when detecting
+	noop move.
+
 2016-10-06  Richard Biener  <rguenther@suse.de>
 
 	PR tree-optimization/77855
diff --git a/gcc/postreload.c b/gcc/postreload.c
index 61c1ce8..4f3a526 100644
--- a/gcc/postreload.c
+++ b/gcc/postreload.c
@@ -153,7 +153,8 @@ reload_cse_simplify (rtx_insn *insn, rtx testreg)
 		  value = SET_DEST (part);
 		}
 	    }
-	  else if (GET_CODE (part) != CLOBBER)
+	  else if (GET_CODE (part) != CLOBBER
+		   && GET_CODE (part) != USE)
 	    break;
 	}