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 (file)
--- 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 (file)
--- 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;
        }