[ARC] Fix tst_movb pattern.

The tst_movb pattern is missing guarding when spitting.

gcc/
2017-06-01  Claudiu Zissulescu  <claziss@synopsys.com>

	* config/arc/arc.md (tst_movb): Add guard when splitting.

testsuite/
2017-06-01  Claudiu Zissulescu  <claziss@synopsys.com>

	* gcc.target/arc/pr9001195952.c: New test.

From-SVN: r248783

gcc/ChangeLog

 2017-06-01  Claudiu Zissulescu  <claziss@synopsys.com>
 
+	* config/arc/arc.md (tst_movb): Add guard when splitting.
+
+2017-06-01  Claudiu Zissulescu  <claziss@synopsys.com>
+
 	* config/arc/arc.c (arc_can_eliminate): Test against
 	arc_frame_pointer_needed.
 

gcc/config/arc/arc.md

@@ -840,7 +840,7 @@
    (clobber (match_scratch:SI 3 "=X,X,X,X,X,X,Rrq,Rrq,c"))]
   "TARGET_NPS_BITOPS"
   "movb.f.cl %3,%1,%p2,%p2,%s2"
-  "reload_completed
+  "TARGET_NPS_BITOPS && reload_completed
    && (extract_constrain_insn_cached (insn), (which_alternative & ~1) != 6)"
   [(set (match_dup 0) (match_dup 4))])
 

gcc/testsuite/ChangeLog

+2017-06-01  Claudiu Zissulescu  <claziss@synopsys.com>
+
+	* gcc.target/arc/pr9001195952.c: New test.
+
 2017-06-01  Tom de Vries  <tom@codesourcery.com>
 
 	* c-c++-common/pr43395.c: Add dg-require-effective-target label_values.

gcc/testsuite/gcc.target/arc/pr9001195952.c

+/* { dg-do compile } */
+/* { dg-skip-if "" { ! { clmcpu } } } */
+/* { dg-options "-mcpu=archs -Os -w -fpic" } */
+
+/* tst_movb split pattern is wrong for anything else than NPS
+   chip.  */
+__bswap_32___bsx() {
+  int a = __builtin_bswap32(__bswap_32___bsx);
+  if (a & 1048575)
+    zlog_warn();
+}