1 files changed, 23 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/tree-ssa/pr21294.c b/gcc/testsuite/gcc.dg/tree-ssa/pr21294.c
new file mode 100644
index 000000000..567e6366a
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/tree-ssa/pr21294.c
@@ -0,0 +1,23 @@
+/* PR tree-optimization/21294
+   VRP did not notice that an address of the form &p->i is nonnull
+   when p is known to be nonnull.  In this testcase, noticing that
+   allows us to eliminate the second "if" statement.  */
+
+/* { dg-do compile } */
+/* { dg-options "-O2 -fno-tree-dominator-opts -fdump-tree-vrp1-details" } */
+
+struct f {
+  int i;
+};
+
+int
+foo (struct f *p)
+{
+  if (p != 0)
+    if (&p->i != 0)
+      return 123;
+  return 0;
+}
+
+/* { dg-final { scan-tree-dump-times "Folding predicate" 1 "vrp1"} } */
+/* { dg-final { cleanup-tree-dump "vrp1" } } */