Do not allow make_compound_operation for vector mode

	* g++.dg/vect/pr70944.cc: New test.
	PR rtl-optimization/70944
	* combine.c (make_compound_operation):
	Do not allow make_compound_operation for vector mode

From-SVN: r238808

gcc/ChangeLog

+2016-07-28  Martin Liska  <mliska@suse.cz>
+
+	PR rtl-optimization/70944
+	* combine.c (make_compound_operation):
+	Do not allow make_compound_operation for vector mode
+
 2016-07-28  Kugan Vivekanandarajah  <kuganv@linaro.org>
 
 	PR middle-end/71994

gcc/combine.c

@@ -7770,6 +7770,10 @@ make_compound_operation (rtx x, enum rtx_code in_code)
   rtx tem;
   const char *fmt;
 
+  /* PR rtl-optimization/70944.  */
+  if (VECTOR_MODE_P (mode))
+    return x;
+
   /* Select the code to be used in recursive calls.  Once we are inside an
      address, we stay there.  If we have a comparison, set to COMPARE,
      but once inside, go back to our default of SET.  */

gcc/testsuite/ChangeLog

+2016-07-28  Martin Liska  <mliska@suse.cz>
+
+	* g++.dg/vect/pr70944.cc: New test.
+
 2016-07-28  Kugan Vivekanandarajah  <kuganv@linaro.org>
 
 	PR middle-end/71994