1 files changed, 25 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/tree-ssa/vrp02.c b/gcc/testsuite/gcc.dg/tree-ssa/vrp02.c
new file mode 100644
index 000000000..56fca9711
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/tree-ssa/vrp02.c
@@ -0,0 +1,25 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -fdump-tree-vrp1" } */
+
+struct A
+{
+  int a;
+  int b;
+};
+
+foo (struct A *p, struct A *q)
+{
+  int x = p->a;
+  if (p == q)
+    return q->a;
+
+  /* We should fold this to 'if (1)' but the assertion for 'p == q'
+     was overwriting the assertion 'p != 0' from the first dereference
+     of 'p'.  */
+  if (p)
+    return x + p->b;
+}
+/* Target with fno-delete-null-pointer-checks should not fold check */
+/* { dg-final { scan-tree-dump-times "Folding predicate p_.*to 1" 1 "vrp1" { target { ! keeps_null_pointer_checks } } } } */
+/* { dg-final { scan-tree-dump-times "Folding predicate p_.*to 1" 0 "vrp1" { target {   keeps_null_pointer_checks } } } } */
+/* { dg-final { cleanup-tree-dump "vrp1" } } */