1 files changed, 33 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/torture/pta-ptrarith-1.c b/gcc/testsuite/gcc.dg/torture/pta-ptrarith-1.c
new file mode 100644
index 000000000..d41868eb4
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/torture/pta-ptrarith-1.c
@@ -0,0 +1,33 @@
+/* { dg-do run } */
+/* { dg-options "-fdump-tree-alias" } */
+/* { dg-skip-if "" { *-*-* } { "-O0" } { "" } } */
+
+struct Foo {
+  int *p;
+};
+
+void __attribute__((noinline))
+foo (void *p)
+{
+  struct Foo *f = (struct Foo *)p - 1;
+  *f->p = 0;
+}
+
+int bar (void)
+{
+  struct Foo f;
+  int i = 1;
+  f.p = &i;
+  foo (&f + 1);
+  return i;
+}
+extern void abort (void);
+int main()
+{
+  if (bar () != 0)
+    abort ();
+  return 0;
+}
+
+/* { dg-final { scan-tree-dump "ESCAPED = {\[^\n\}\]* i f \[^\n\}\]*}" "alias" } } */
+/* { dg-final { cleanup-tree-dump "alias" } } */