1 // RUN: %clang_cc1 -emit-llvm -triple i686-apple-darwin9 -fobjc-runtime=macosx-fragile-10.5 -o - %s -O2 | FileCheck %s 2 3 @interface MyClass 4 { 5 } 6 - (void)method; 7 @end 8 9 @implementation MyClass 10 11 // CHECK: define internal void @"\01-[MyClass method]" 12 - (void)method 13 { 14 // CHECK: call i32 @objc_sync_enter 15 // CHECK: call void @objc_exception_try_enter 16 // CHECK: call i32 @_setjmp 17 @synchronized(self) { 18 } 19 } 20 21 @end 22 23 // CHECK-LABEL: define void @foo( 24 void foo(id a) { 25 // CHECK: [[A:%.*]] = alloca i8* 26 // CHECK: [[SYNC:%.*]] = alloca i8* 27 28 // CHECK: store i8* [[AVAL:%.*]], i8** [[A]] 29 // CHECK-NEXT: call i32 @objc_sync_enter(i8* [[AVAL]]) 30 // CHECK-NEXT: store i8* [[AVAL]], i8** [[SYNC]] 31 // CHECK-NEXT: call void @objc_exception_try_enter 32 // CHECK: call i32 @_setjmp 33 @synchronized(a) { 34 // This is unreachable, but the optimizers can't know that. 35 // CHECK: call void asm sideeffect "", "=*m,=*m,=*m"(i8** nonnull [[A]], i8** nonnull [[SYNC]] 36 // CHECK: call i32 @objc_sync_exit 37 // CHECK: call i8* @objc_exception_extract 38 // CHECK: call void @objc_exception_throw 39 // CHECK: unreachable 40 41 // CHECK: call void @objc_exception_try_exit 42 // CHECK: [[T:%.*]] = load i8*, i8** [[SYNC]] 43 // CHECK-NEXT: call i32 @objc_sync_exit 44 // CHECK: ret void 45 return; 46 } 47 48 } 49 50 // CHECK-LABEL: define i32 @f0( 51 int f0(id a) { 52 // TODO: we can optimize the ret to a constant if we can figure out 53 // either that x isn't stored to within the synchronized block or 54 // that the synchronized block can't longjmp. 55 56 // CHECK: [[X:%.*]] = alloca i32 57 // CHECK: store i32 1, i32* [[X]] 58 int x = 0; 59 @synchronized((x++, a)) { 60 } 61 62 // CHECK: [[T:%.*]] = load i32, i32* [[X]] 63 // CHECK: ret i32 [[T]] 64 return x; 65 } 66 67 // CHECK-LABEL: define void @f1( 68 void f1(id a) { 69 // Check that the return doesn't go through the cleanup. 70 extern void opaque(void); 71 opaque(); 72 73 // CHECK: call void @opaque() 74 // CHECK-NEXT: ret void 75 76 @synchronized(({ return; }), a) { 77 return; 78 } 79 } 80
