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llvm-project/clang/test/CodeGenObjC/arc-precise-lifetime.m
Mehdi Amini e0ac46e69d Revert "Remove rdar links; NFC" 
This reverts commit d618f1c3b12effd0c2bdb7d02108d3551f389d3d.
This commit wasn't reviewed ahead of time and significant concerns were
raised immediately after it landed. According to our developer policy
this warrants immediate revert of the commit.

https://llvm.org/docs/DeveloperPolicy.html#patch-reversion-policy

Differential Revision: https://reviews.llvm.org/D155509
2023-07-17 18:08:04 -07:00

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Objective-C
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// RUN: %clang_cc1 -triple x86_64-apple-darwin10 -emit-llvm -fblocks -fobjc-arc -fobjc-runtime-has-weak -O2 -disable-llvm-passes -o - %s | FileCheck %s
#define PRECISE_LIFETIME __attribute__((objc_precise_lifetime))
id test0_helper(void) __attribute__((ns_returns_retained));
void test0(void) {
PRECISE_LIFETIME id x = test0_helper();
x = 0;
// CHECK: [[X:%.*]] = alloca ptr
// CHECK-NEXT: call void @llvm.lifetime.start.p0(i64 8, ptr [[X]])
// CHECK-NEXT: [[CALL:%.*]] = call ptr @test0_helper()
// CHECK-NEXT: store ptr [[CALL]], ptr [[X]]
// CHECK-NEXT: [[T1:%.*]] = load ptr, ptr [[X]]
// CHECK-NEXT: store ptr null, ptr [[X]]
// CHECK-NEXT: call void @llvm.objc.release(ptr [[T1]]) [[NUW:#[0-9]+]]
// CHECK-NOT: clang.imprecise_release
// CHECK-NEXT: [[T1:%.*]] = load ptr, ptr [[X]]
// CHECK-NEXT: call void @llvm.objc.release(ptr [[T1]]) [[NUW:#[0-9]+]]
// CHECK-NOT: clang.imprecise_release
// CHECK-NEXT: call void @llvm.lifetime.end.p0(i64 8, ptr [[X]])
// CHECK-NEXT: ret void
}
// rdar://problem/9821110 - precise lifetime should suppress extension
// rdar://problem/22172983 - should work for calls via property syntax, too
@interface Test1
- (char*) interior __attribute__((objc_returns_inner_pointer));
// Should we allow this on properties? Yes! see // rdar://14990439
@property (nonatomic, readonly) char * PropertyReturnsInnerPointer __attribute__((objc_returns_inner_pointer));
@end
extern Test1 *test1_helper(void);
// CHECK-LABEL: define{{.*}} void @test1a_message()
void test1a_message(void) {
// CHECK: [[PTR:%.*]] = alloca ptr, align 8
// CHECK: [[C:%.*]] = alloca ptr, align 8
// CHECK: call void @llvm.lifetime.start.p0(i64 8, ptr [[PTR]])
// CHECK: [[T0:%.*]] = call ptr @test1_helper() [ "clang.arc.attachedcall"(ptr @llvm.objc.retainAutoreleasedReturnValue) ]
// CHECK-NEXT: call void (...) @llvm.objc.clang.arc.noop.use(ptr [[T0]])
// CHECK-NEXT: store ptr [[T0]]
// CHECK-NEXT: call void @llvm.lifetime.start.p0(i64 8, ptr [[C]])
// CHECK-NEXT: [[T0:%.*]] = load ptr, ptr
// CHECK-NEXT: [[T2:%.*]] = call ptr @llvm.objc.retainAutorelease(ptr [[T0]])
// CHECK-NEXT: [[T4:%.*]] = load ptr, ptr @OBJC_SELECTOR_REFERENCES_
// CHECK-NEXT: [[T6:%.*]] = call ptr
// CHECK-NEXT: store ptr [[T6]], ptr
// CHECK-NEXT: call void @llvm.lifetime.end.p0(i64 8, ptr [[C]])
// CHECK-NEXT: [[T0:%.*]] = load ptr, ptr
// CHECK-NEXT: call void @llvm.objc.release(ptr [[T0]]) [[NUW]], !clang.imprecise_release
// CHECK-NEXT: call void @llvm.lifetime.end.p0(i64 8, ptr [[PTR]])
// CHECK-NEXT: ret void
Test1 *ptr = test1_helper();
char *c = [(ptr) interior];
}
// CHECK-LABEL: define{{.*}} void @test1a_property()
void test1a_property(void) {
// CHECK: [[PTR:%.*]] = alloca ptr, align 8
// CHECK: [[C:%.*]] = alloca ptr, align 8
// CHECK: call void @llvm.lifetime.start.p0(i64 8, ptr [[PTR]])
// CHECK: [[T0:%.*]] = call ptr @test1_helper() [ "clang.arc.attachedcall"(ptr @llvm.objc.retainAutoreleasedReturnValue) ]
// CHECK-NEXT: call void (...) @llvm.objc.clang.arc.noop.use(ptr [[T0]])
// CHECK-NEXT: store ptr [[T0]]
// CHECK-NEXT: call void @llvm.lifetime.start.p0(i64 8, ptr [[C]])
// CHECK-NEXT: [[T0:%.*]] = load ptr, ptr
// CHECK-NEXT: [[T2:%.*]] = call ptr @llvm.objc.retainAutorelease(ptr [[T0]])
// CHECK-NEXT: [[T4:%.*]] = load ptr, ptr @OBJC_SELECTOR_REFERENCES_
// CHECK-NEXT: [[T6:%.*]] = call ptr
// CHECK-NEXT: store ptr [[T6]], ptr
// CHECK-NEXT: call void @llvm.lifetime.end.p0(i64 8, ptr [[C]])
// CHECK-NEXT: [[T0:%.*]] = load ptr, ptr
// CHECK-NEXT: call void @llvm.objc.release(ptr [[T0]]) [[NUW]], !clang.imprecise_release
// CHECK-NEXT: call void @llvm.lifetime.end.p0(i64 8, ptr [[PTR]])
// CHECK-NEXT: ret void
Test1 *ptr = test1_helper();
char *c = ptr.interior;
}
// CHECK-LABEL: define{{.*}} void @test1b_message()
void test1b_message(void) {
// CHECK: [[PTR:%.*]] = alloca ptr, align 8
// CHECK: [[C:%.*]] = alloca ptr, align 8
// CHECK: call void @llvm.lifetime.start.p0(i64 8, ptr [[PTR]])
// CHECK: [[T0:%.*]] = call ptr @test1_helper() [ "clang.arc.attachedcall"(ptr @llvm.objc.retainAutoreleasedReturnValue) ]
// CHECK-NEXT: call void (...) @llvm.objc.clang.arc.noop.use(ptr [[T0]])
// CHECK-NEXT: store ptr [[T0]]
// CHECK-NEXT: call void @llvm.lifetime.start.p0(i64 8, ptr [[C]])
// CHECK-NEXT: [[T0:%.*]] = load ptr, ptr
// CHECK-NEXT: [[T1:%.*]] = load ptr, ptr @OBJC_SELECTOR_REFERENCES_
// CHECK-NEXT: [[T3:%.*]] = call ptr
// CHECK-NEXT: store ptr [[T3]], ptr
// CHECK-NEXT: call void @llvm.lifetime.end.p0(i64 8, ptr [[C]])
// CHECK-NEXT: [[T0:%.*]] = load ptr, ptr
// CHECK-NEXT: call void @llvm.objc.release(ptr [[T0]]) [[NUW]]
// CHECK-NOT: clang.imprecise_release
// CHECK-NEXT: call void @llvm.lifetime.end.p0(i64 8, ptr [[PTR]])
// CHECK-NEXT: ret void
PRECISE_LIFETIME Test1 *ptr = test1_helper();
char *c = [ptr interior];
}
// CHECK-LABEL: define{{.*}} void @test1b_property()
void test1b_property(void) {
// CHECK: [[PTR:%.*]] = alloca ptr, align 8
// CHECK: [[C:%.*]] = alloca ptr, align 8
// CHECK: call void @llvm.lifetime.start.p0(i64 8, ptr [[PTR]])
// CHECK: [[T0:%.*]] = call ptr @test1_helper() [ "clang.arc.attachedcall"(ptr @llvm.objc.retainAutoreleasedReturnValue) ]
// CHECK-NEXT: call void (...) @llvm.objc.clang.arc.noop.use(ptr [[T0]])
// CHECK-NEXT: store ptr [[T0]]
// CHECK-NEXT: call void @llvm.lifetime.start.p0(i64 8, ptr [[C]])
// CHECK-NEXT: [[T0:%.*]] = load ptr, ptr
// CHECK-NEXT: [[T1:%.*]] = load ptr, ptr @OBJC_SELECTOR_REFERENCES_
// CHECK-NEXT: [[T3:%.*]] = call ptr
// CHECK-NEXT: store ptr [[T3]], ptr
// CHECK-NEXT: call void @llvm.lifetime.end.p0(i64 8, ptr [[C]])
// CHECK-NEXT: [[T0:%.*]] = load ptr, ptr
// CHECK-NEXT: call void @llvm.objc.release(ptr [[T0]]) [[NUW]]
// CHECK-NOT: clang.imprecise_release
// CHECK-NEXT: call void @llvm.lifetime.end.p0(i64 8, ptr [[PTR]])
// CHECK-NEXT: ret void
PRECISE_LIFETIME Test1 *ptr = test1_helper();
char *c = ptr.interior;
}
// CHECK-LABEL: define{{.*}} void @test1c_message()
void test1c_message(void) {
// CHECK: [[PTR:%.*]] = alloca ptr, align 8
// CHECK: [[PC:%.*]] = alloca ptr, align 8
// CHECK: call void @llvm.lifetime.start.p0(i64 8, ptr [[PTR]])
// CHECK: [[T0:%.*]] = call ptr @test1_helper() [ "clang.arc.attachedcall"(ptr @llvm.objc.retainAutoreleasedReturnValue) ]
// CHECK-NEXT: call void (...) @llvm.objc.clang.arc.noop.use(ptr [[T0]])
// CHECK-NEXT: store ptr [[T0]]
// CHECK-NEXT: call void @llvm.lifetime.start.p0(i64 8, ptr [[PC]])
// CHECK-NEXT: [[T0:%.*]] = load ptr, ptr
// CHECK-NEXT: [[T2:%.*]] = call ptr @llvm.objc.retainAutorelease(ptr [[T0]])
// CHECK-NEXT: [[T4:%.*]] = load ptr, ptr @OBJC_SELECTOR_REFERENCES_
// CHECK-NEXT: [[T6:%.*]] = call ptr
// CHECK-NEXT: store ptr [[T6]], ptr
// CHECK-NEXT: call void @llvm.lifetime.end.p0(i64 8, ptr [[PC]])
// CHECK-NEXT: [[T0:%.*]] = load ptr, ptr
// CHECK-NEXT: call void @llvm.objc.release(ptr [[T0]]) [[NUW]], !clang.imprecise_release
// CHECK-NEXT: call void @llvm.lifetime.end.p0(i64 8, ptr [[PTR]])
// CHECK-NEXT: ret void
Test1 *ptr = test1_helper();
char *pc = [ptr PropertyReturnsInnerPointer];
}
// CHECK-LABEL: define{{.*}} void @test1c_property()
void test1c_property(void) {
// CHECK: [[PTR:%.*]] = alloca ptr, align 8
// CHECK: [[PC:%.*]] = alloca ptr, align 8
// CHECK: call void @llvm.lifetime.start.p0(i64 8, ptr [[PTR]])
// CHECK: [[T0:%.*]] = call ptr @test1_helper() [ "clang.arc.attachedcall"(ptr @llvm.objc.retainAutoreleasedReturnValue) ]
// CHECK-NEXT: call void (...) @llvm.objc.clang.arc.noop.use(ptr [[T0]])
// CHECK-NEXT: store ptr [[T0]]
// CHECK-NEXT: call void @llvm.lifetime.start.p0(i64 8, ptr [[PC]])
// CHECK-NEXT: [[T0:%.*]] = load ptr, ptr
// CHECK-NEXT: [[T2:%.*]] = call ptr @llvm.objc.retainAutorelease(ptr [[T0]])
// CHECK-NEXT: [[T4:%.*]] = load ptr, ptr @OBJC_SELECTOR_REFERENCES_
// CHECK-NEXT: [[T6:%.*]] = call ptr
// CHECK-NEXT: store ptr [[T6]], ptr
// CHECK-NEXT: call void @llvm.lifetime.end.p0(i64 8, ptr [[PC]])
// CHECK-NEXT: [[T0:%.*]] = load ptr, ptr
// CHECK-NEXT: call void @llvm.objc.release(ptr [[T0]]) [[NUW]], !clang.imprecise_release
// CHECK-NEXT: call void @llvm.lifetime.end.p0(i64 8, ptr [[PTR]])
// CHECK-NEXT: ret void
Test1 *ptr = test1_helper();
char *pc = ptr.PropertyReturnsInnerPointer;
}
// CHECK-LABEL: define{{.*}} void @test1d_message()
void test1d_message(void) {
// CHECK: [[PTR:%.*]] = alloca ptr, align 8
// CHECK: [[PC:%.*]] = alloca ptr, align 8
// CHECK: call void @llvm.lifetime.start.p0(i64 8, ptr [[PTR]])
// CHECK: [[T0:%.*]] = call ptr @test1_helper() [ "clang.arc.attachedcall"(ptr @llvm.objc.retainAutoreleasedReturnValue) ]
// CHECK-NEXT: call void (...) @llvm.objc.clang.arc.noop.use(ptr [[T0]])
// CHECK-NEXT: store ptr [[T0]]
// CHECK-NEXT: call void @llvm.lifetime.start.p0(i64 8, ptr [[PC]])
// CHECK-NEXT: [[T0:%.*]] = load ptr, ptr
// CHECK-NEXT: [[SEL:%.*]] = load ptr, ptr @OBJC_SELECTOR_REFERENCES_
// CHECK-NEXT: [[CALL1:%.*]] = call ptr @objc_msgSend(ptr noundef [[T0]], ptr noundef [[SEL]])
// CHECK-NEXT: store ptr [[CALL1]], ptr
// CHECK-NEXT: call void @llvm.lifetime.end.p0(i64 8, ptr [[PC]])
// CHECK-NEXT: [[NINE:%.*]] = load ptr, ptr
// CHECK-NEXT: call void @llvm.objc.release(ptr [[NINE]])
// CHECK-NEXT: call void @llvm.lifetime.end.p0(i64 8, ptr [[PTR]])
// CHECK-NEXT: ret void
PRECISE_LIFETIME Test1 *ptr = test1_helper();
char *pc = [ptr PropertyReturnsInnerPointer];
}
// CHECK-LABEL: define{{.*}} void @test1d_property()
void test1d_property(void) {
// CHECK: [[PTR:%.*]] = alloca ptr, align 8
// CHECK: [[PC:%.*]] = alloca ptr, align 8
// CHECK: call void @llvm.lifetime.start.p0(i64 8, ptr [[PTR]])
// CHECK: [[T0:%.*]] = call ptr @test1_helper() [ "clang.arc.attachedcall"(ptr @llvm.objc.retainAutoreleasedReturnValue) ]
// CHECK-NEXT: call void (...) @llvm.objc.clang.arc.noop.use(ptr [[T0]])
// CHECK-NEXT: store ptr [[T0]]
// CHECK-NEXT: call void @llvm.lifetime.start.p0(i64 8, ptr [[PC]])
// CHECK-NEXT: [[T0:%.*]] = load ptr, ptr
// CHECK-NEXT: [[SEL:%.*]] = load ptr, ptr @OBJC_SELECTOR_REFERENCES_
// CHECK-NEXT: [[CALL1:%.*]] = call ptr @objc_msgSend(ptr noundef [[T0]], ptr noundef [[SEL]])
// CHECK-NEXT: store ptr [[CALL1]], ptr
// CHECK-NEXT: call void @llvm.lifetime.end.p0(i64 8, ptr [[PC]])
// CHECK-NEXT: [[NINE:%.*]] = load ptr, ptr
// CHECK-NEXT: call void @llvm.objc.release(ptr [[NINE]])
// CHECK-NEXT: call void @llvm.lifetime.end.p0(i64 8, ptr [[PTR]])
// CHECK-NEXT: ret void
PRECISE_LIFETIME Test1 *ptr = test1_helper();
char *pc = ptr.PropertyReturnsInnerPointer;
}
@interface Test2 {
@public
id ivar;
}
@end
// CHECK-LABEL: define{{.*}} void @test2(
void test2(Test2 *x) {
x->ivar = 0;
// CHECK: [[X:%.*]] = alloca ptr
// CHECK-NEXT: [[T1:%.*]] = call ptr @llvm.objc.retain(ptr {{%.*}}) [[NUW]]
// CHECK-NEXT: store ptr [[T1]], ptr [[X]],
// CHECK-NEXT: [[T0:%.*]] = load ptr, ptr [[X]],
// CHECK-NEXT: [[OFFSET:%.*]] = load i64, ptr @"OBJC_IVAR_$_Test2.ivar"
// CHECK-NEXT: [[T2:%.*]] = getelementptr inbounds i8, ptr [[T0]], i64 [[OFFSET]]
// CHECK-NEXT: [[T4:%.*]] = load ptr, ptr [[T2]],
// CHECK-NEXT: store ptr null, ptr [[T2]],
// CHECK-NEXT: call void @llvm.objc.release(ptr [[T4]]) [[NUW]]
// CHECK-NOT: imprecise
// CHECK-NEXT: [[T0:%.*]] = load ptr, ptr [[X]]
// CHECK-NEXT: call void @llvm.objc.release(ptr [[T0]]) [[NUW]], !clang.imprecise_release
// CHECK-NEXT: ret void
}
// CHECK-LABEL: define{{.*}} void @test3(ptr
void test3(PRECISE_LIFETIME id x) {
// CHECK: [[X:%.*]] = alloca ptr,
// CHECK-NEXT: [[T0:%.*]] = call ptr @llvm.objc.retain(ptr {{%.*}}) [[NUW]]
// CHECK-NEXT: store ptr [[T0]], ptr [[X]],
// CHECK-NEXT: [[T0:%.*]] = load ptr, ptr [[X]]
// CHECK-NEXT: call void @llvm.objc.release(ptr [[T0]]) [[NUW]]
// CHECK-NOT: imprecise_release
// CHECK-NEXT: ret void
}
// CHECK: attributes [[NUW]] = { nounwind }
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