1 files changed, 41 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/tree-ssa/pr20701.c b/gcc/testsuite/gcc.dg/tree-ssa/pr20701.c
new file mode 100644
index 000000000..3ddf48e6f
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/tree-ssa/pr20701.c
@@ -0,0 +1,41 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -fdump-tree-vrp1 -fno-early-inlining" } */
+
+typedef struct {
+  int code;
+} *rtx;
+
+static inline void *zero ()
+{
+  return 0;
+}
+static inline int three ()
+{
+  return 3;
+}
+
+int
+can_combine_p (rtx insn, rtx elt)
+{
+  rtx set;
+
+  set = zero ();
+  if (insn->code == three ())
+    set = insn;
+  else
+    {
+      set = elt;
+      if (set == zero ())
+	return 0;
+    }
+
+  if (set == zero ())
+    return 1;
+
+  return 0;
+}
+
+/* Target with fno-delete-null-pointer-checks should not fold checks */
+/* { dg-final { scan-tree-dump-times "Folding predicate.*to 0" 1 "vrp1" { target { ! keeps_null_pointer_checks } } } } */
+/* { dg-final { scan-tree-dump-times "Folding predicate.*to 0" 0 "vrp1" { target {   keeps_null_pointer_checks } } } } */
+/* { dg-final { cleanup-tree-dump "vrp1" } } */