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// RUN: %clang_cc1 -emit-llvm -triple i686-apple-darwin9 -fobjc-fragile-abi -o - %s -O2 | FileCheck %s
@interface MyClass
{
}
- (void)method;
@end
@implementation MyClass
// CHECK: define internal void @"\01-[MyClass method]"
- (void)method
{
// CHECK: call void @objc_sync_enter
// CHECK: call void @objc_exception_try_enter
// CHECK: call i32 @_setjmp
@synchronized(self) {
}
}
@end
// CHECK: define void @foo(
void foo(id a) {
// CHECK: [[A:%.*]] = alloca i8*
// CHECK: [[SYNC:%.*]] = alloca i8*
// CHECK: store i8* [[AVAL:%.*]], i8** [[A]]
// CHECK-NEXT: call void @objc_sync_enter(i8* [[AVAL]])
// CHECK-NEXT: store i8* [[AVAL]], i8** [[SYNC]]
// CHECK-NEXT: call void @objc_exception_try_enter
// CHECK: call i32 @_setjmp
@synchronized(a) {
// This is unreachable, but the optimizers can't know that.
// CHECK: call void asm sideeffect "", "=*m,=*m,=*m"(i8** [[A]], i8** [[SYNC]]
// CHECK: call void @objc_sync_exit
// CHECK: call i8* @objc_exception_extract
// CHECK: call void @objc_exception_throw
// CHECK: unreachable
// CHECK: call void @objc_exception_try_exit
// CHECK: [[T:%.*]] = load i8** [[SYNC]]
// CHECK-NEXT: call void @objc_sync_exit
// CHECK: ret void
return;
}
}
// CHECK: define i32 @f0(
int f0(id a) {
// TODO: we can optimize the ret to a constant if we can figure out
// either that x isn't stored to within the synchronized block or
// that the synchronized block can't longjmp.
// CHECK: [[X:%.*]] = alloca i32
// CHECK: store i32 1, i32* [[X]]
int x = 0;
@synchronized((x++, a)) {
}
// CHECK: [[T:%.*]] = load i32* [[X]]
// CHECK: ret i32 [[T]]
return x;
}
// CHECK: define void @f1(
void f1(id a) {
// Check that the return doesn't go through the cleanup.
extern void opaque(void);
opaque();
// CHECK: call void @opaque()
// CHECK-NEXT: ret void
@synchronized(({ return; }), a) {
return;
}
}
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