1 files changed, 37 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/torture/pta-ptrarith-3.c b/gcc/testsuite/gcc.dg/torture/pta-ptrarith-3.c
new file mode 100644
index 000000000..6c08319d8
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/torture/pta-ptrarith-3.c
@@ -0,0 +1,37 @@
+/* { dg-do run } */
+/* { dg-options "-fdump-tree-alias" } */
+/* { dg-skip-if "" { *-*-* } { "-O0" } { "" } } */
+
+extern void abort (void);
+struct X {
+  int *p;
+  int *q;
+  int *r;
+};
+int __attribute__((noinline))
+foo(int i, int j, int k, int off)
+{
+  struct X x;
+  int **p, *q;
+  x.p = &i;
+  x.q = &j;
+  x.r = &k;
+  p = &x.q;
+  p += off;
+  /* *p points to { i, j, k } */
+  q = *p;
+  return *q;
+}
+int main()
+{
+  if (foo(1, 2, 3, -1) != 1)
+    abort ();
+  if (foo(1, 2, 3, 0) != 2)
+    abort ();
+  if (foo(1, 2, 3, 1) != 3)
+    abort ();
+  return 0;
+}
+
+/* { dg-final { scan-tree-dump "q_., points-to vars: { i j k }" "alias" } } */
+/* { dg-final { cleanup-tree-dump "alias" } } */