1 files changed, 28 insertions, 0 deletions
diff --git a/test/CodeGenObjC/builtin-constant-p.m b/test/CodeGenObjC/builtin-constant-p.m
new file mode 100644
index 0000000000..c9ce1529b7
--- /dev/null
+++ b/test/CodeGenObjC/builtin-constant-p.m
@@ -0,0 +1,28 @@
+// RUN: %clang_cc1 -triple x86_64-apple-darwin10 -emit-llvm -O3 -disable-llvm-passes -o - %s | FileCheck %s
+
+// Test that can call `__builtin_constant_p` with instances of different
+// Objective-C classes.
+// rdar://problem/47499250
+@class Foo;
+@class Bar;
+
+extern void callee(void);
+
+// CHECK-LABEL: define void @test(%0* %foo, %1* %bar)
+void test(Foo *foo, Bar *bar) {
+  // CHECK: [[ADDR_FOO:%.*]] = bitcast %0* %{{.*}} to i8*
+  // CHECK-NEXT: call i1 @llvm.is.constant.p0i8(i8* [[ADDR_FOO]])
+  // CHECK: [[ADDR_BAR:%.*]] = bitcast %1* %{{.*}} to i8*
+  // CHECK-NEXT: call i1 @llvm.is.constant.p0i8(i8* [[ADDR_BAR]])
+  if (__builtin_constant_p(foo) && __builtin_constant_p(bar))
+    callee();
+}
+
+// Test other Objective-C types.
+// CHECK-LABEL: define void @test_more(i8* %object, i8* %klass)
+void test_more(id object, Class klass) {
+  // CHECK: call i1 @llvm.is.constant.p0i8(i8* %{{.*}})
+  // CHECK: call i1 @llvm.is.constant.p0i8(i8* %{{.*}})
+  if (__builtin_constant_p(object) && __builtin_constant_p(klass))
+    callee();
+}