1 files changed, 28 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/tree-ssa/vrp01.c b/gcc/testsuite/gcc.dg/tree-ssa/vrp01.c
new file mode 100644
index 000000000..3f8e82061
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/tree-ssa/vrp01.c
@@ -0,0 +1,28 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -fdump-tree-vrp1" } */
+
+foo (int *p, int i)
+{
+  int x;
+
+  if (i > 10)
+    {
+      if (p)
+	{
+	  x = *p;
+	  p = 0;
+	}
+    }
+  else
+    p = 0;
+
+  /* This should be folded to if (1), but only if we insert an
+     assertion on the ELSE edge from the inner 'if (p)'.  */
+  if (p == 0)
+    return x + 1;
+
+  return i;
+}
+
+/* { dg-final { scan-tree-dump-times "Folding predicate p_.*to 1" 1 "vrp1" } } */
+/* { dg-final { cleanup-tree-dump "vrp1" } } */