1 files changed, 90 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/tree-ssa/alias-18.c b/gcc/testsuite/gcc.dg/tree-ssa/alias-18.c
new file mode 100644
index 000000000..e86acbc19
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/tree-ssa/alias-18.c
@@ -0,0 +1,90 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -fdump-tree-fre-details -fdump-tree-optimized" } */
+
+struct A {
+  int i;
+  int j;
+  float x;
+};
+struct B {
+  struct A a;
+  int k;
+};
+
+int g;
+
+int test0 (struct A *p, struct A *q)
+{
+  p->i = 0;
+  q->j = -1;
+  return p->i;
+}
+
+int test1 (struct A *p, struct B *q)
+{
+  p->i = 1;
+  q->k = -1;
+  return p->i;
+}
+
+int test2 (struct A *p, struct B *q)
+{
+  p->i = 2;
+  q->a.i = -1;
+  return p->i;
+}
+
+int test3 (struct A *p, struct B *q)
+{
+  p->i = 3;
+  q->a.j = -1;
+  return p->i;
+}
+
+int test4 (struct A *p)
+{
+  g = 4;
+  p->i = -1;
+  return g;
+}
+
+int test5 (struct A *p)
+{
+  p->i = 5;
+  g = -1;
+  return p->i;
+}
+
+int test6 (struct A *p, int *q)
+{
+  p->i = 6;
+  *q = -1;
+  return p->i;
+}
+
+int test7 (struct A *p, int *q)
+{
+  p->j = 7;
+  *q = -1;
+  return p->j;
+}
+
+int test8 (struct A *p, int *q)
+{
+  *q = 8;
+  p->x = -1;
+  return *q;
+}
+
+/* { dg-final { scan-tree-dump "with 0" "fre" } } */
+/* { dg-final { scan-tree-dump "with 1" "fre" } } */
+/* { dg-final { scan-tree-dump "with 3" "fre" } } */
+/* { dg-final { scan-tree-dump "with 4" "fre" } } */
+/* { dg-final { scan-tree-dump "with 5" "fre" } } */
+/* { dg-final { scan-tree-dump "with 8" "fre" } } */
+/* { dg-final { scan-tree-dump-not "return 2;" "optimized" } } */
+/* { dg-final { scan-tree-dump-not "return 6;" "optimized" } } */
+/* { dg-final { scan-tree-dump-not "return 7;" "optimized" } } */
+/* { dg-final { scan-tree-dump-not "return -1;" "optimized" } } */
+/* { dg-final { cleanup-tree-dump "fre" } } */
+/* { dg-final { cleanup-tree-dump "optimized" } } */