re PR target/68538 (ICE in gen_reg_rtx, at emit-rtl.c:1027 when cross-compiling…

re PR target/68538 (ICE in gen_reg_rtx, at emit-rtl.c:1027 when cross-compiling for cris-linux-gnu target)

	PR target/68538
	* config/cris/cris.md: Don't call copy_to_mode_reg unless
	can_create_pseudo_p is true.

        PR target/68538
	* gcc.c-torture/compile/pr68538.c: New test.

From-SVN: r242682

gcc/ChangeLog

+2016-11-21  Jeff Law  <law@redhat.com>
+
+	PR target/68538
+	* config/cris/cris.md: Don't call copy_to_mode_reg unless
+	can_create_pseudo_p is true.
+
 2016-11-21  Segher Boessenkool  <segher@kernel.crashing.org>
 
 	PR target/68803

gcc/config/cris/cris.md

@@ -499,7 +499,8 @@
 {
   if (MEM_P (operands[0])
       && operands[1] != const0_rtx
-      && (!TARGET_V32 || (!REG_P (operands[1]) && can_create_pseudo_p ())))
+      && can_create_pseudo_p ()
+      && (!TARGET_V32 || !REG_P (operands[1])))
     operands[1] = copy_to_mode_reg (DImode, operands[1]);
 
   /* Some other ports (as of 2001-09-10 for example mcore and romp) also

gcc/testsuite/ChangeLog

+2016-11-21  Jeff Law  <law@redhat.com>
+
+        PR target/68538
+	* gcc.c-torture/compile/pr68538.c: New test.
+
 2016-11-21  Michael Meissner  <meissner@linux.vnet.ibm.com>
 
 	* gcc.target/powerpc/ppc-round2.c: Allow XSCVDPSXWS and XSCVDPUXWS

gcc/testsuite/gcc.c-torture/compile/pr68538.c

+struct percpu_counter {
+	signed long long count;
+};
+struct blkg_rwstat {
+	struct percpu_counter cpu_cnt[4];
+};
+struct cfq_group {
+	struct blkg_rwstat service_time;
+};
+struct cfq_queue {
+	struct cfq_group *group;
+};
+struct request {
+	struct cfq_queue *active_queue;
+	unsigned long long cmd_flags;
+	void *priv;
+};
+static void blkg_rwstat_add(struct blkg_rwstat *rwstat, int rw, unsigned long long val)
+{
+	struct percpu_counter *cnt;
+	if (rw & 1)
+		cnt = &rwstat->cpu_cnt[1];
+	else
+		cnt = &rwstat->cpu_cnt[0];
+	cnt->count += val;
+	if (rw & 2)
+		cnt = &rwstat->cpu_cnt[2];
+	else
+		cnt = &rwstat->cpu_cnt[3];
+	cnt->count += val;
+}
+extern unsigned long long rq_start_time_ns(void);
+extern unsigned long long rq_io_start_time_ns(void);
+extern int rq_is_sync(void);
+extern void cfq_arm_slice_timer(void);
+void cfq_completed_request(struct request *rq)
+{
+	struct cfq_queue *queue = rq->priv;
+	int sync = rq_is_sync();
+	struct cfq_group *group = queue->group;
+	long long start_time = rq_start_time_ns();
+	long long io_start_time = rq_io_start_time_ns();
+	int rw = rq->cmd_flags;
+
+	if (io_start_time < 1)
+		blkg_rwstat_add(&group->service_time, rw, 1 - io_start_time);
+	blkg_rwstat_add(0, rw, io_start_time - start_time);
+
+	if (rq->active_queue == queue && sync)
+		cfq_arm_slice_timer();
+}
+