1 files changed, 31 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/tree-ssa/vrp09.c b/gcc/testsuite/gcc.dg/tree-ssa/vrp09.c
new file mode 100644
index 000000000..9ff0f14f7
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/tree-ssa/vrp09.c
@@ -0,0 +1,31 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -fdump-tree-vrp1" } */
+
+foo (int *p)
+{
+  int x = baz ();
+
+  if (p == 0)
+    goto L78;
+  else
+    {
+      x = *p;
+      /* This should be folded to if (1).  */
+      if (p)
+	x = x + 1;
+L78:
+      /* This should not be folded to if (1).  */
+      if (p)
+	{
+	  x = baz (*p);
+	  /* This should be folded to if (1).  */
+	  if (p)
+	    return x + 3;
+	}
+
+      return x - 3;
+    }
+}
+
+/* { dg-final { scan-tree-dump-times "Folding predicate p_.. != 0B to 1" 2 "vrp1" } } */
+/* { dg-final { cleanup-tree-dump "vrp1" } } */