[PATCH] [ARC] Fix tst_movb pattern.

[Claudiu Zissulescu]

From: claziss <claz...@synopsys.com>

The tst_movb pattern is missing guarding when spitting.

gcc/
2017-05-24  Claudiu Zissulescu  <claz...@synopsys.com>

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

testsuite/
2017-05-24  Claudiu Zissulescu  <claz...@synopsys.com>

        * gcc.target/arc/pr9001195952.c: New test.
---
 gcc/config/arc/arc.md                       |  2 +-
 gcc/testsuite/gcc.target/arc/pr9001195952.c | 11 +++++++++++
 2 files changed, 12 insertions(+), 1 deletion(-)
 create mode 100755 gcc/testsuite/gcc.target/arc/pr9001195952.c

diff --git a/gcc/config/arc/arc.md b/gcc/config/arc/arc.md
index e78abaa..d5510ae 100644
--- a/gcc/config/arc/arc.md
+++ b/gcc/config/arc/arc.md
@@ -863,7 +863,7 @@ archs4xd, archs4xd_slow"
    (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))])
 
diff --git a/gcc/testsuite/gcc.target/arc/pr9001195952.c 
b/gcc/testsuite/gcc.target/arc/pr9001195952.c
new file mode 100755
index 0000000..252438d
--- /dev/null
+++ b/gcc/testsuite/gcc.target/arc/pr9001195952.c
@@ -0,0 +1,11 @@
+/* { 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();
+}
-- 
1.9.1