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

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
c6a26179 · Jan Hubicka · Jan Hubicka · b3972588 · c6a26179 · c6a26179
Commit c6a26179 authored Oct 06, 2016 by Jan Hubicka Committed by Jan Hubicka Oct 06, 2016
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gcc/ChangeLog
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gcc/postreload.c
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--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
+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

--- 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;
 	}