Add clang support for new Objective-C literal syntax for NSDictionary, NSArray,
NSNumber, and boolean literals.  This includes both Sema and Codegen support.
Included is also support for new Objective-C container subscripting.

My apologies for the large patch.  It was very difficult to break apart.
The patch introduces changes to the driver as well to cause clang to link
in additional runtime support when needed to support the new language features.

Docs are forthcoming to document the implementation and behavior of these features.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@152137 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/CodeGenObjCXX/objc-container-subscripting.mm b/test/CodeGenObjCXX/objc-container-subscripting.mm
new file mode 100644
index 0000000..dfe48e9
--- /dev/null
+++ b/test/CodeGenObjCXX/objc-container-subscripting.mm
@@ -0,0 +1,57 @@
+// RUN: %clang_cc1 -emit-llvm -triple x86_64-apple-darwin -o - %s | FileCheck %s
+
+typedef unsigned int size_t;
+@protocol P @end
+
+@interface NSMutableArray
+- (id)objectAtIndexedSubscript:(size_t)index;
+- (void)setObject:(id)object atIndexedSubscript:(size_t)index;
+@end
+
+struct S {
+  operator unsigned int ();
+  operator id ();
+};
+
+@interface NSMutableDictionary
+- (id)objectForKeyedSubscript:(id)key;
+- (void)setObject:(id)object forKeyedSubscript:(id)key;
+@end
+
+int main() {
+  NSMutableArray<P> * array;
+  S s;
+  id oldObject = array[(int)s];
+
+  NSMutableDictionary<P> *dict;
+  dict[(id)s] = oldObject;
+  oldObject = dict[(id)s];
+
+}
+
+template <class T> void test2(NSMutableArray *a) {
+  a[10] = 0;
+}
+template void test2<int>(NSMutableArray*);
+// CHECK: define weak_odr void @_Z5test2IiEvP14NSMutableArray
+// CHECK: @objc_msgSend 
+// CHECK: ret void
+
+
+template <class T> void test3(NSMutableArray *a) {
+  a[sizeof(T)] = 0;
+}
+
+template void test3<int>(NSMutableArray*);
+// CHECK: define weak_odr void @_Z5test3IiEvP14NSMutableArray
+// CHECK: @objc_msgSend
+// CHECK: ret void
+
+// CHECK: define void @_Z11static_dataP14NSMutableArray
+void static_data(NSMutableArray *array) {
+  // CHECK: call i32 @__cxa_guard_acquire
+  // CHECK: {{call i8*.*@objc_msgSend }}
+  // CHECK: call void @__cxa_guard_release
+  static id x = array[4];
+  // CHECK: ret void
+}