In debugger mode, make ObjC message sends to unknown selectors return
__unknown_anytype, and rewrite such message sends correctly.

I had to bite the bullet and actually add a debugger support mode for this
one, which is a bit unfortunate, but there really isn't anything else
I could imagine doing;  this is clearly just debugger-specific behavior.



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@135051 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/SemaObjC/debugger-support.m b/test/SemaObjC/debugger-support.m
new file mode 100644
index 0000000..21c096e
--- /dev/null
+++ b/test/SemaObjC/debugger-support.m
@@ -0,0 +1,14 @@
+// RUN: %clang_cc1 -triple x86_64-apple-darwin10 -fdebugger-support %s -emit-llvm -o - | FileCheck %s
+
+// rdar://problem/9416370
+void test0(id x) {
+  struct A { int w, x, y, z; };
+  struct A result = (struct A) [x makeStruct];
+  // CHECK:     define void @test0(
+  // CHECK:      [[X:%.*]] = alloca i8*, align 8
+  // CHECK-NEXT: [[RESULT:%.*]] = alloca [[A:%.*]], align 4
+  // CHECK-NEXT: store i8* {{%.*}}, i8** [[X]],
+  // CHECK-NEXT: [[T0:%.*]] = load i8** [[X]],
+  // CHECK-NEXT: [[T1:%.*]] = load i8** @"\01L_OBJC_SELECTOR_REFERENCES_"
+  // CHECK-NEXT: [[T2:%.*]] = call { i64, i64 } bitcast (i8* (i8*, i8*, ...)* @objc_msgSend to { i64, i64 } (i8*, i8*)*)(i8* [[T0]], i8* [[T1]])
+}