Testcase for FSF GCC bug 79794.

	gcc/testsuite/
	PR middle-end/79794
	* gcc.target/aarch64/pr79794.c: New.

From-SVN: r249612

gcc/testsuite/ChangeLog

+2017-06-23  Jim Wilson  <jim.wilson@linaro.org>
+
+	PR middle-end/79794
+	* gcc.target/aarch64/pr79794.c: New.
+
 2017-06-23  Michael Meissner  <meissner@linux.vnet.ibm.com>
 
 	PR target/80510

gcc/testsuite/gcc.target/aarch64/pr79794.c

+/* PR middle-end/79794  */
+/* { dg-do compile } */
+/* { dg-options "-O3" } */
+/* { dg-final { scan-assembler-not "umov" } } */
+
+struct node_struct
+{
+  float _Complex gap;
+  unsigned long long state;
+};
+
+struct reg_struct
+{
+  int size;
+  struct node_struct *node;
+};
+
+void
+func(int target, struct reg_struct *reg)
+{
+  int i;
+
+  for(i=0; i<reg->size; i++)
+    reg->node[i].state ^= ((unsigned long long) 1 << target);
+}