Initial checkin of GCC 4.9.0 from trunk (r208799).

Change-Id: I48a3c08bb98542aa215912a75f03c0890e497dba

1 files changed, 75 insertions, 0 deletions

diff --git a/gcc-4.9/gcc/testsuite/gcc.target/sh/pr51244-19.c b/gcc-4.9/gcc/testsuite/gcc.target/sh/pr51244-19.c
new file mode 100644
index 000000000..5845d93f6
--- /dev/null
+++ b/gcc-4.9/gcc/testsuite/gcc.target/sh/pr51244-19.c
@@ -0,0 +1,75 @@
+/* Check that no unnecessary T bit stores are done before conditional
+   branches.
+   This case was extracted from the CSiBE set and contained the following
+   sequence:
+	mov.l	@(8,r4),r2
+	mov.l	@(4,r4),r3
+	cmp/gt	r2,r3
+	movt	r2
+.L3:
+	tst	r2,r2
+	bt/s	.L12
+	mov	#-1,r0
+
+	.....
+
+	mov.l	@r4,r2
+	tst	r2,r2
+	bra	.L3
+	movt	r2
+
+   In this reduced code the movt insns were only present in the
+   unwanted sequences.  Thus, if we see any movt insns, something is not
+   working as expected.  This test requires -O2 because the T bit stores
+   in question will be eliminated in additional insn split passes after
+   reload.  */
+/* { dg-do compile }  */
+/* { dg-options "-O2" } */
+/* { dg-skip-if "" { "sh*-*-*" } { "-m5*" } { "" } } */
+/* { dg-final { scan-assembler-not "movt" } } */
+
+struct request
+{
+ unsigned long nr_sectors;
+};
+
+struct request_list
+{
+ int count;
+};
+
+struct request_queue
+{
+ struct request_list rq;
+ volatile int nr_sectors;
+ int max_queue_sectors;
+ int can_throttle;
+ unsigned long bounce_pfn;
+};
+
+typedef struct request_queue request_queue_t;
+
+static inline int
+blk_oversized_queue (request_queue_t* q)
+{
+  if (q->can_throttle)
+    return q->nr_sectors > q->max_queue_sectors;
+  return q->rq.count == 0;
+}
+
+struct request*
+get_request (request_queue_t* q, int rw)
+{
+  struct request* rq = ((void*)0);
+  struct request_list *rl = &q->rq;
+
+  if (blk_oversized_queue (q))
+    {
+      if ((rw == 1) || (rw == 0))
+	return ((void*)0);
+      if (blk_oversized_queue (q))
+	return ((void*)0);
+    }
+
+  return (void*)-100;
+}