--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/clang/test/CodeGenObjC/arc-foreach.m	Thu Feb 13 15:10:13 2020 +0900
@@ -0,0 +1,241 @@
+// RUN: %clang_cc1 -triple x86_64-apple-darwin -fblocks -fobjc-arc -fobjc-runtime-has-weak -emit-llvm %s -o - | FileCheck -check-prefix CHECK-LP64 %s
+// RUN: %clang_cc1 -triple x86_64-apple-darwin -O1 -fblocks -fobjc-arc -fobjc-runtime-has-weak -emit-llvm %s -o - | FileCheck -check-prefix CHECK-LP64-OPT %s
+// rdar://9503326
+// rdar://9606600
+
+extern void use(id);
+extern void use_block(void (^)(void));
+
+struct NSFastEnumerationState;
+@interface NSArray
+- (unsigned long) countByEnumeratingWithState: (struct NSFastEnumerationState*) state
+                  objects: (id*) buffer
+                  count: (unsigned long) bufferSize;
+@end;
+
+void test0(NSArray *array) {
+  // 'x' should be initialized without a retain.
+  // We should actually do a non-constant capture, and that
+  // capture should require a retain.
+  for (id x in array) {
+    use_block(^{ use(x); });
+  }
+}
+
+// CHECK-LP64-LABEL:    define void @test0(
+// CHECK-LP64:      [[ARRAY:%.*]] = alloca [[ARRAY_T:%.*]]*,
+// CHECK-LP64-NEXT: [[X:%.*]] = alloca i8*,
+// CHECK-LP64-NEXT: [[STATE:%.*]] = alloca [[STATE_T:%.*]],
+// CHECK-LP64-NEXT: [[BUFFER:%.*]] = alloca [16 x i8*], align 8
+// CHECK-LP64-NEXT: [[BLOCK:%.*]] = alloca [[BLOCK_T:<{.*}>]],
+
+// CHECK-LP64-OPT-LABEL: define void @test0
+// CHECK-LP64-OPT: [[STATE:%.*]] = alloca [[STATE_T:%.*]], align 8
+// CHECK-LP64-OPT-NEXT: [[BUFFER:%.*]] = alloca [16 x i8*], align 8
+// CHECK-LP64-OPT-NEXT: [[BLOCK:%.*]] = alloca [[BLOCK_T:<{.*}>]], align 8
+
+// Initialize 'array'.
+// CHECK-LP64-NEXT: store [[ARRAY_T]]* null, [[ARRAY_T]]** [[ARRAY]]
+// CHECK-LP64-NEXT: [[ZERO:%.*]] = bitcast [[ARRAY_T]]** [[ARRAY]] to i8**
+// CHECK-LP64-NEXT: [[ONE:%.*]] = bitcast [[ARRAY_T]]* {{%.*}} to i8*
+// CHECK-LP64-NEXT: call void @llvm.objc.storeStrong(i8** [[ZERO]], i8* [[ONE]]) [[NUW:#[0-9]+]]
+
+// Initialize the fast enumaration state.
+// CHECK-LP64-NEXT: [[T0:%.*]] = bitcast [[STATE_T]]* [[STATE]] to i8*
+// CHECK-LP64-NEXT: call void @llvm.memset.p0i8.i64(i8* align 8 [[T0]], i8 0, i64 64, i1 false)
+
+// Evaluate the collection expression and retain.
+// CHECK-LP64-NEXT: [[T0:%.*]] = load [[ARRAY_T]]*, [[ARRAY_T]]** [[ARRAY]], align 8
+// CHECK-LP64-NEXT: [[T1:%.*]] = bitcast [[ARRAY_T]]* [[T0]] to i8*
+// CHECK-LP64-NEXT: [[T2:%.*]] = call i8* @llvm.objc.retain(i8* [[T1]])
+// CHECK-LP64-NEXT: [[SAVED_ARRAY:%.*]] = bitcast i8* [[T2]] to [[ARRAY_T]]*
+
+// Call the enumeration method.
+// CHECK-LP64-NEXT: [[T0:%.*]] = load i8*, i8** @OBJC_SELECTOR_REFERENCES_
+// CHECK-LP64-NEXT: [[T1:%.*]] = bitcast [[ARRAY_T]]* [[SAVED_ARRAY]] to i8*
+// CHECK-LP64-NEXT: [[SIZE:%.*]] = call i64 bitcast (i8* (i8*, i8*, ...)* @objc_msgSend to i64 (i8*, i8*, [[STATE_T]]*, [16 x i8*]*, i64)*)(i8* [[T1]], i8* [[T0]], [[STATE_T]]* [[STATE]], [16 x i8*]* [[BUFFER]], i64 16)
+
+// Check for a nonzero result.
+// CHECK-LP64-NEXT: [[T0:%.*]] = icmp eq i64 [[SIZE]], 0
+// CHECK-LP64-NEXT: br i1 [[T0]]
+
+// CHECK-LP64:      [[T0:%.*]] = getelementptr inbounds [[STATE_T]], [[STATE_T]]* [[STATE]], i32 0, i32 1
+// CHECK-LP64-NEXT: [[T1:%.*]] = load i8**, i8*** [[T0]]
+// CHECK-LP64-NEXT: [[T2:%.*]] = getelementptr i8*, i8** [[T1]], i64
+// CHECK-LP64-NEXT: [[T3:%.*]] = load i8*, i8** [[T2]]
+// CHECK-LP64-NEXT: store i8* [[T3]], i8** [[X]]
+
+// CHECK-LP64:      [[D0:%.*]] = getelementptr inbounds [[BLOCK_T]], [[BLOCK_T]]* [[BLOCK]], i32 0, i32 5
+// CHECK-LP64:      [[T0:%.*]] = getelementptr inbounds [[BLOCK_T]], [[BLOCK_T]]* [[BLOCK]], i32 0, i32 5
+// CHECK-LP64-NEXT: [[T1:%.*]] = load i8*, i8** [[X]]
+// CHECK-LP64-NEXT: [[T2:%.*]] = call i8* @llvm.objc.retain(i8* [[T1]])
+// CHECK-LP64-NEXT: store i8* [[T2]], i8** [[T0]]
+// CHECK-LP64-NEXT: [[BLOCK1:%.*]] = bitcast [[BLOCK_T]]* [[BLOCK]]
+// CHECK-LP64-NEXT: call void @use_block(void ()* [[BLOCK1]])
+// CHECK-LP64-NEXT: call void @llvm.objc.storeStrong(i8** [[D0]], i8* null)
+// CHECK-LP64-NOT:  call void (...) @llvm.objc.clang.arc.use(i8* [[CAPTURE]])
+
+// CHECK-LP64-OPT: [[D0:%.*]] = getelementptr inbounds [[BLOCK_T]], [[BLOCK_T]]* [[BLOCK]], i64 0, i32 5
+// CHECK-LP64-OPT: [[CAPTURE:%.*]] = load i8*, i8** [[D0]]
+// CHECK-LP64-OPT: call void (...) @llvm.objc.clang.arc.use(i8* [[CAPTURE]])
+
+// CHECK-LP64:      [[T0:%.*]] = load i8*, i8** @OBJC_SELECTOR_REFERENCES_
+// CHECK-LP64-NEXT: [[T1:%.*]] = bitcast [[ARRAY_T]]* [[SAVED_ARRAY]] to i8*
+// CHECK-LP64-NEXT: [[SIZE:%.*]] = call i64 bitcast (i8* (i8*, i8*, ...)* @objc_msgSend to i64 (i8*, i8*, [[STATE_T]]*, [16 x i8*]*, i64)*)(i8* [[T1]], i8* [[T0]], [[STATE_T]]* [[STATE]], [16 x i8*]* [[BUFFER]], i64 16)
+
+// Release the array.
+// CHECK-LP64:      [[T0:%.*]] = bitcast [[ARRAY_T]]* [[SAVED_ARRAY]] to i8*
+// CHECK-LP64-NEXT: call void @llvm.objc.release(i8* [[T0]])
+
+// Destroy 'array'.
+// CHECK-LP64:      [[T0:%.*]] = bitcast [[ARRAY_T]]** [[ARRAY]] to i8**
+// CHECK-LP64-NEXT: call void @llvm.objc.storeStrong(i8** [[T0]], i8* null)
+// CHECK-LP64-NEXT: ret void
+
+// CHECK-LP64-LABEL:    define internal void @__test0_block_invoke
+// CHECK-LP64:      [[BLOCK:%.*]] = bitcast i8* {{%.*}} to [[BLOCK_T]]*
+// CHECK-LP64-NOT:  ret
+// CHECK-LP64:      [[T0:%.*]] = getelementptr inbounds [[BLOCK_T]], [[BLOCK_T]]* [[BLOCK]], i32 0, i32 5
+// CHECK-LP64-NEXT: [[T2:%.*]] = load i8*, i8** [[T0]], align 8 
+// CHECK-LP64-NEXT: call void @use(i8* [[T2]])
+
+void test1(NSArray *array) {
+  for (__weak id x in array) {
+    use_block(^{ use(x); });
+  }
+}
+
+// CHECK-LP64-LABEL:    define void @test1(
+// CHECK-LP64:      alloca [[ARRAY_T:%.*]]*,
+// CHECK-LP64-NEXT: [[X:%.*]] = alloca i8*,
+// CHECK-LP64-NEXT: [[STATE:%.*]] = alloca [[STATE_T:%.*]],
+// CHECK-LP64-NEXT: alloca [16 x i8*], align 8
+// CHECK-LP64-NEXT: [[BLOCK:%.*]] = alloca [[BLOCK_T:<{.*}>]],
+
+// CHECK-LP64:      [[T0:%.*]] = getelementptr inbounds [[STATE_T]], [[STATE_T]]* [[STATE]], i32 0, i32 1
+// CHECK-LP64-NEXT: [[T1:%.*]] = load i8**, i8*** [[T0]]
+// CHECK-LP64-NEXT: [[T2:%.*]] = getelementptr i8*, i8** [[T1]], i64
+// CHECK-LP64-NEXT: [[T3:%.*]] = load i8*, i8** [[T2]]
+// CHECK-LP64-NEXT: call i8* @llvm.objc.initWeak(i8** [[X]], i8* [[T3]])
+
+// CHECK-LP64:      [[D0:%.*]] = getelementptr inbounds [[BLOCK_T]], [[BLOCK_T]]* [[BLOCK]], i32 0, i32 5
+// CHECK-LP64:      [[T0:%.*]] = getelementptr inbounds [[BLOCK_T]], [[BLOCK_T]]* [[BLOCK]], i32 0, i32 5
+// CHECK-LP64-NEXT: call void @llvm.objc.copyWeak(i8** [[T0]], i8** [[X]])
+// CHECK-LP64-NEXT: [[T1:%.*]] = bitcast [[BLOCK_T]]* [[BLOCK]] to
+// CHECK-LP64: call void @use_block
+// CHECK-LP64-NEXT: call void @llvm.objc.destroyWeak(i8** [[D0]])
+// CHECK-LP64-NEXT: call void @llvm.objc.destroyWeak(i8** [[X]])
+
+// rdar://problem/9817306
+@interface Test2
+- (NSArray *) array;
+@end
+void test2(Test2 *a) {
+  for (id x in a.array) {
+    use(x);
+  }
+}
+
+// CHECK-LP64-LABEL:    define void @test2(
+// CHECK-LP64:      [[T0:%.*]] = call [[ARRAY_T]]* bitcast (i8* (i8*, i8*, ...)* @objc_msgSend to [[ARRAY_T]]* (i8*, i8*)*)(
+// CHECK-LP64-NEXT: [[T1:%.*]] = bitcast [[ARRAY_T]]* [[T0]] to i8*
+// CHECK-LP64-NEXT: [[T2:%.*]] = notail call i8* @llvm.objc.retainAutoreleasedReturnValue(i8* [[T1]])
+// CHECK-LP64-NEXT: [[COLL:%.*]] = bitcast i8* [[T2]] to [[ARRAY_T]]*
+
+// Make sure it's not immediately released before starting the iteration.
+// CHECK-LP64-NEXT: load i8*, i8** @OBJC_SELECTOR_REFERENCES_
+// CHECK-LP64-NEXT: [[T0:%.*]] = bitcast [[ARRAY_T]]* [[COLL]] to i8*
+// CHECK-LP64-NEXT: @objc_msgSend
+
+// This bitcast is for the mutation check.
+// CHECK-LP64:      [[T0:%.*]] = bitcast [[ARRAY_T]]* [[COLL]] to i8*
+// CHECK-LP64-NEXT: @objc_enumerationMutation
+
+// This bitcast is for the 'next' message send.
+// CHECK-LP64:      [[T0:%.*]] = bitcast [[ARRAY_T]]* [[COLL]] to i8*
+// CHECK-LP64-NEXT: @objc_msgSend
+
+// This bitcast is for the final release.
+// CHECK-LP64:      [[T0:%.*]] = bitcast [[ARRAY_T]]* [[COLL]] to i8*
+// CHECK-LP64-NEXT: call void @llvm.objc.release(i8* [[T0]])
+
+
+// Check that the 'continue' label is positioned appropriately
+// relative to the collection clenaup.
+void test3(NSArray *array) {
+  for (id x in array) {
+    if (!x) continue;
+    use(x);
+  }
+
+  // CHECK-LP64-LABEL:    define void @test3(
+  // CHECK-LP64:      [[ARRAY:%.*]] = alloca [[ARRAY_T]]*, align 8
+  // CHECK-LP64-NEXT: [[X:%.*]] = alloca i8*, align 8
+  // CHECK-LP64:      [[T0:%.*]] = load i8*, i8** [[X]], align 8
+  // CHECK-LP64-NEXT: [[T1:%.*]] = icmp ne i8* [[T0]], null
+  // CHECK-LP64-NEXT: br i1 [[T1]],
+  // CHECK-LP64:      br label [[L:%[^ ]+]]
+  // CHECK-LP64:      [[T0:%.*]] = load i8*, i8** [[X]], align 8
+  // CHECK-LP64-NEXT: call void @use(i8* [[T0]])
+  // CHECK-LP64-NEXT: br label [[L]]
+}
+
+@interface NSObject @end
+
+@interface I1 : NSObject
+- (NSArray *) foo1:(void (^)(void))block;
+- (void) foo2;
+@end
+
+NSArray *array4;
+
+@implementation I1 : NSObject
+- (NSArray *) foo1:(void (^)(void))block {
+  block();
+  return array4;
+}
+
+- (void) foo2 {
+  for (id x in [self foo1:^{ use(self); }]) {
+    use(x);
+    break;
+  }
+}
+@end
+
+// CHECK-LP64-LABEL: define internal void @"\01-[I1 foo2]"(
+// CHECK-LP64:         [[SELF_ADDR:%.*]] = alloca [[TY:%.*]]*,
+// CHECK-LP64:         [[BLOCK:%.*]] = alloca <{ i8*, i32, i32, i8*, %struct.__block_descriptor*, [[TY]]* }>,
+// CHECK-LP64:         store [[TY]]* %self, [[TY]]** [[SELF_ADDR]]
+// CHECK-LP64:         [[T0:%.*]] = getelementptr inbounds <{ i8*, i32, i32, i8*, %struct.__block_descriptor*, [[TY]]* }>, <{ i8*, i32, i32, i8*, %struct.__block_descriptor*, [[TY]]* }>* [[BLOCK]], i32 0, i32 5
+// CHECK-LP64:         [[BC:%.*]] = getelementptr inbounds <{ i8*, i32, i32, i8*, %struct.__block_descriptor*, [[TY]]* }>, <{ i8*, i32, i32, i8*, %struct.__block_descriptor*, [[TY]]* }>* [[BLOCK]], i32 0, i32 5
+// CHECK-LP64:         [[T1:%.*]] = load [[TY]]*, [[TY]]** [[SELF_ADDR]]
+// CHECK-LP64:         [[T2:%.*]] = bitcast [[TY]]* [[T1]] to i8*
+// CHECK-LP64:         call i8* @llvm.objc.retain(i8* [[T2]])
+
+// CHECK-LP64-OPT-LABEL: define internal void @"\01-[I1 foo2]"(
+// CHECK-LP64-OPT: [[TY:%.*]]* %self
+// CHECK-LP64-OPT: [[BLOCK:%.*]] = alloca [[BLOCK_T:<{.*}>]],
+// CHECK-LP64-OPT: [[T0:%.*]] = getelementptr inbounds [[BLOCK_T]], [[BLOCK_T]]* [[BLOCK]], i64 0, i32 5
+
+// CHECK-LP64:         [[T5:%.*]] = bitcast [[TY]]** [[T0]] to i8**
+// CHECK-LP64:         call void @llvm.objc.storeStrong(i8** [[T5]], i8* null)
+// CHECK-LP64-NOT:     call void (...) @llvm.objc.clang.arc.use([[TY]]* [[T5]])
+// CHECK-LP64:         switch i32 {{%.*}}, label %[[UNREACHABLE:.*]] [
+// CHECK-LP64-NEXT:      i32 0, label %[[CLEANUP_CONT:.*]]
+// CHECK-LP64-NEXT:      i32 2, label %[[FORCOLL_END:.*]]
+// CHECK-LP64-NEXT:    ]
+
+// CHECK-LP64-OPT: [[T5:%.*]] = load [[TY]]*, [[TY]]** [[T0]]
+// CHECK-LP64-OPT: call void (...) @llvm.objc.clang.arc.use([[TY]]* [[T5]])
+
+// CHECK-LP64:       {{^|:}}[[CLEANUP_CONT]]
+// CHECK-LP64-NEXT:    br label %[[FORCOLL_END]]
+
+// CHECK-LP64:       {{^|:}}[[FORCOLL_END]]
+// CHECK-LP64-NEXT:    ret void
+
+// CHECK-LP64:       {{^|:}}[[UNREACHABLE]]
+// CHECK-LP64-NEXT:    unreachable
+
+// CHECK-LP64: attributes [[NUW]] = { nounwind }