re PR tree-optimization/68417 (Missed vectorization opportunity when setting struct field)

2015-12-09  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/68417
	* gcc.dg/vect/pr68417.c: New testcase.

From-SVN: r231452

gcc/testsuite/ChangeLog

+2015-12-09  Richard Biener  <rguenther@suse.de>
+
+	PR tree-optimization/68417
+	* gcc.dg/vect/pr68417.c: New testcase.
+
 2015-12-09  Martin Liska  <mliska@suse.cz>
 
 	* gcc.dg/ipa/pr68790.c: New test.

gcc/testsuite/gcc.dg/vect/pr68417.c

+/* { dg-do compile } */
+/* { dg-require-effective-target vect_int } */
+/* { dg-require-effective-target vect_condition } */
+
+#define N 16
+
+typedef struct {
+  int x;
+  int y;
+} Point;
+
+void
+foo(Point *p1, Point *p2, Point *p3, int *data)
+{
+  int m, m1, m2;
+  int i;
+
+  for (i = 0; i < N; i++) {
+    m = *data++;
+
+    m1 = p1->x - m;
+    m2 = p2->x + m;
+
+    p3->y = (m1 >= m2) ? p1->y : p2->y;
+
+    p1++;
+    p2++;
+    p3++;
+  }
+}
+
+/* { dg-final { scan-tree-dump "vectorized 1 loops" "vect" } } */