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llvm-project/clang/test/CodeGenObjCXX/arc.mm
Nikita Popov c23b4fbdbb
[IR] Remove size argument from lifetime intrinsics (#150248) 
Now that #149310 has restricted lifetime intrinsics to only work on
allocas, we can also drop the explicit size argument. Instead, the size
is implied by the alloca.

This removes the ability to only mark a prefix of an alloca alive/dead.
We never used that capability, so we should remove the need to handle
that possibility everywhere (though many key places, including stack
coloring, did not actually respect this).
2025-08-08 11:09:34 +02:00

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// RUN: %clang_cc1 -triple x86_64-apple-darwin10 -emit-llvm -fobjc-runtime-has-weak -fblocks -fobjc-arc -O2 -disable-llvm-passes -o - %s | FileCheck %s
struct NSFastEnumerationState;
@interface NSArray
- (unsigned long) countByEnumeratingWithState: (struct NSFastEnumerationState*) state
objects: (id*) buffer
count: (unsigned long) bufferSize;
@end;
NSArray *nsarray() { return 0; }
// CHECK: define{{.*}} ptr @_Z7nsarrayv()
void use(id);
// The analogous ObjC testcase test46 in arr.m.
void test0(__weak id *wp, __weak volatile id *wvp) {
extern id test0_helper(void);
// TODO: this is sub-optimal, we should retain at the actual call site.
// TODO: in the non-volatile case, we do not need to be reloading.
// CHECK: [[T1:%.*]] = call noundef ptr @_Z12test0_helperv() [ "clang.arc.attachedcall"(ptr @llvm.objc.retainAutoreleasedReturnValue) ]
// CHECK-NEXT: call void (...) @llvm.objc.clang.arc.noop.use(ptr [[T1]])
// CHECK-NEXT: [[T2:%.*]] = load ptr, ptr {{%.*}}, align 8
// CHECK-NEXT: [[T3:%.*]] = call ptr @llvm.objc.storeWeak(ptr [[T2]], ptr [[T1]])
// CHECK-NEXT: [[T4:%.*]] = call ptr @llvm.objc.retain(ptr [[T3]])
// CHECK-NEXT: store ptr [[T4]], ptr
// CHECK-NEXT: call void @llvm.objc.release(ptr [[T1]])
id x = *wp = test0_helper();
// CHECK: [[T1:%.*]] = call noundef ptr @_Z12test0_helperv() [ "clang.arc.attachedcall"(ptr @llvm.objc.retainAutoreleasedReturnValue) ]
// CHECK-NEXT: call void (...) @llvm.objc.clang.arc.noop.use(ptr [[T1]])
// CHECK-NEXT: [[T2:%.*]] = load ptr, ptr {{%.*}}, align 8
// CHECK-NEXT: [[T3:%.*]] = call ptr @llvm.objc.storeWeak(ptr [[T2]], ptr [[T1]])
// CHECK-NEXT: [[T4:%.*]] = call ptr @llvm.objc.loadWeakRetained(ptr [[T2]])
// CHECK-NEXT: store ptr [[T4]], ptr
// CHECK-NEXT: call void @llvm.objc.release(ptr [[T1]])
id y = *wvp = test0_helper();
}
struct Test1_helper { Test1_helper(); };
@interface Test1 @end
@implementation Test1 { Test1_helper x; } @end
// CHECK: define internal noundef ptr @"\01-[Test1 .cxx_construct]"(
// CHECK: call void @_ZN12Test1_helperC1Ev(
// CHECK-NEXT: load
// CHECK-NEXT: ret ptr
void test34(int cond) {
__strong id strong;
__weak id weak;
extern void test34_sink(id *);
test34_sink(cond ? &strong : 0);
test34_sink(cond ? &weak : 0);
// CHECK-LABEL: define{{.*}} void @_Z6test34i(
// CHECK: [[COND:%.*]] = alloca i32
// CHECK-NEXT: [[STRONG:%.*]] = alloca ptr
// CHECK-NEXT: [[WEAK:%.*]] = alloca ptr
// CHECK-NEXT: [[TEMP1:%.*]] = alloca ptr
// CHECK-NEXT: [[TEMP2:%.*]] = alloca ptr
// CHECK-NEXT: [[CONDCLEANUPSAVE:%.*]] = alloca ptr
// CHECK-NEXT: [[CONDCLEANUP:%.*]] = alloca i1
// CHECK-NEXT: store i32
// CHECK-NEXT: call void @llvm.lifetime.start.p0(ptr [[STRONG]])
// CHECK-NEXT: store ptr null, ptr [[STRONG]]
// CHECK-NEXT: call void @llvm.lifetime.start.p0(ptr [[WEAK]])
// CHECK-NEXT: call ptr @llvm.objc.initWeak(ptr [[WEAK]], ptr null)
// CHECK-NEXT: [[T0:%.*]] = load i32, ptr [[COND]]
// CHECK-NEXT: [[T1:%.*]] = icmp ne i32 [[T0]], 0
// CHECK: [[ARG:%.*]] = phi ptr
// CHECK-NEXT: [[T0:%.*]] = icmp eq ptr [[ARG]], null
// CHECK-NEXT: [[T1:%.*]] = select i1 [[T0]], ptr null, ptr [[TEMP1]]
// CHECK-NEXT: br i1 [[T0]],
// CHECK: [[T0:%.*]] = load ptr, ptr [[ARG]]
// CHECK-NEXT: store ptr [[T0]], ptr [[TEMP1]]
// CHECK-NEXT: br label
// CHECK: [[W0:%.*]] = phi ptr [ [[T0]], {{%.*}} ], [ poison, {{%.*}} ]
// CHECK: call void @_Z11test34_sinkPU15__autoreleasingP11objc_object(ptr noundef [[T1]])
// CHECK-NEXT: [[T0:%.*]] = icmp eq ptr [[ARG]], null
// CHECK-NEXT: br i1 [[T0]],
// CHECK: [[T0:%.*]] = load ptr, ptr [[TEMP1]]
// CHECK-NEXT: [[T1:%.*]] = call ptr @llvm.objc.retain(ptr [[T0]])
// CHECK-NEXT: call void (...) @llvm.objc.clang.arc.use(ptr [[W0]])
// CHECK-NEXT: [[T2:%.*]] = load ptr, ptr [[ARG]]
// CHECK-NEXT: store ptr [[T1]], ptr [[ARG]]
// CHECK-NEXT: call void @llvm.objc.release(ptr [[T2]])
// CHECK-NEXT: br label
// CHECK: [[T0:%.*]] = load i32, ptr [[COND]]
// CHECK-NEXT: [[T1:%.*]] = icmp ne i32 [[T0]], 0
// CHECK: [[ARG:%.*]] = phi ptr
// CHECK-NEXT: [[T0:%.*]] = icmp eq ptr [[ARG]], null
// CHECK-NEXT: [[T1:%.*]] = select i1 [[T0]], ptr null, ptr [[TEMP2]]
// CHECK-NEXT: store i1 false, ptr [[CONDCLEANUP]]
// CHECK-NEXT: br i1 [[T0]],
// CHECK: [[T0:%.*]] = call ptr @llvm.objc.loadWeakRetained(ptr [[ARG]])
// CHECK-NEXT: store ptr [[T0]], ptr [[CONDCLEANUPSAVE]]
// CHECK-NEXT: store i1 true, ptr [[CONDCLEANUP]]
// CHECK-NEXT: store ptr [[T0]], ptr [[TEMP2]]
// CHECK-NEXT: br label
// CHECK: call void @_Z11test34_sinkPU15__autoreleasingP11objc_object(ptr noundef [[T1]])
// CHECK-NEXT: [[T0:%.*]] = icmp eq ptr [[ARG]], null
// CHECK-NEXT: br i1 [[T0]],
// CHECK: [[T0:%.*]] = load ptr, ptr [[TEMP2]]
// CHECK-NEXT: call ptr @llvm.objc.storeWeak(ptr [[ARG]], ptr [[T0]])
// CHECK-NEXT: br label
// CHECK: call void @llvm.objc.destroyWeak(ptr [[WEAK]])
// CHECK: ret void
}
struct Test35_Helper {
static id makeObject1() __attribute__((ns_returns_retained));
id makeObject2() __attribute__((ns_returns_retained));
static id makeObject3();
id makeObject4();
};
// CHECK-LABEL: define{{.*}} void @_Z6test3513Test35_HelperPS_
void test35(Test35_Helper x0, Test35_Helper *x0p) {
// CHECK: call void @llvm.lifetime.start
// CHECK: call noundef ptr @_ZN13Test35_Helper11makeObject1Ev
// CHECK-NOT: call ptr @llvm.objc.retain
id obj1 = Test35_Helper::makeObject1();
// CHECK: call void @llvm.lifetime.start
// CHECK: call noundef ptr @_ZN13Test35_Helper11makeObject2Ev
// CHECK-NOT: call ptr @llvm.objc.retain
id obj2 = x0.makeObject2();
// CHECK: call void @llvm.lifetime.start
// CHECK: call noundef ptr @_ZN13Test35_Helper11makeObject2Ev
// CHECK-NOT: call ptr @llvm.objc.retain
id obj3 = x0p->makeObject2();
id (Test35_Helper::*pmf)() __attribute__((ns_returns_retained))
= &Test35_Helper::makeObject2;
// CHECK: call void @llvm.lifetime.start
// CHECK: call noundef ptr %
// CHECK-NOT: call ptr @llvm.objc.retain
id obj4 = (x0.*pmf)();
// CHECK: call void @llvm.lifetime.start
// CHECK: call noundef ptr %
// CHECK-NOT: call ptr @llvm.objc.retain
id obj5 = (x0p->*pmf)();
// CHECK: call void @llvm.objc.release
// CHECK: call void @llvm.lifetime.end
// CHECK: call void @llvm.objc.release
// CHECK: call void @llvm.lifetime.end
// CHECK: call void @llvm.objc.release
// CHECK: call void @llvm.lifetime.end
// CHECK: call void @llvm.objc.release
// CHECK: call void @llvm.lifetime.end
// CHECK: call void @llvm.objc.release
// CHECK: call void @llvm.lifetime.end
// CHECK-NEXT: ret void
}
// CHECK-LABEL: define{{.*}} void @_Z7test35b13Test35_HelperPS_
void test35b(Test35_Helper x0, Test35_Helper *x0p) {
// CHECK: call void @llvm.lifetime.start
// CHECK: call noundef ptr @_ZN13Test35_Helper11makeObject3Ev{{.*}} [ "clang.arc.attachedcall"(ptr @llvm.objc.retainAutoreleasedReturnValue) ]
id obj1 = Test35_Helper::makeObject3();
// CHECK: call void @llvm.lifetime.start
// CHECK: call noundef ptr @_ZN13Test35_Helper11makeObject4Ev{{.*}} [ "clang.arc.attachedcall"(ptr @llvm.objc.retainAutoreleasedReturnValue) ]
id obj2 = x0.makeObject4();
// CHECK: call void @llvm.lifetime.start
// CHECK: call noundef ptr @_ZN13Test35_Helper11makeObject4Ev{{.*}} [ "clang.arc.attachedcall"(ptr @llvm.objc.retainAutoreleasedReturnValue) ]
id obj3 = x0p->makeObject4();
id (Test35_Helper::*pmf)() = &Test35_Helper::makeObject4;
// CHECK: call void @llvm.lifetime.start
// CHECK: call noundef ptr %{{.*}} [ "clang.arc.attachedcall"(ptr @llvm.objc.retainAutoreleasedReturnValue) ]
id obj4 = (x0.*pmf)();
// CHECK: call void @llvm.lifetime.start
// CHECK: call noundef ptr %{{.*}} [ "clang.arc.attachedcall"(ptr @llvm.objc.retainAutoreleasedReturnValue) ]
id obj5 = (x0p->*pmf)();
// CHECK: call void @llvm.objc.release
// CHECK: call void @llvm.lifetime.end
// CHECK: call void @llvm.objc.release
// CHECK: call void @llvm.lifetime.end
// CHECK: call void @llvm.lifetime.end
// CHECK: call void @llvm.objc.release
// CHECK: call void @llvm.lifetime.end
// CHECK: call void @llvm.objc.release
// CHECK: call void @llvm.lifetime.end
// CHECK: call void @llvm.objc.release
// CHECK: call void @llvm.lifetime.end
// CHECK-NEXT: ret void
}
// CHECK-LABEL: define{{.*}} ptr @_Z6test36P11objc_object(
id test36(id z) {
// CHECK: llvm.objc.retain
// CHECK: llvm.objc.retain
// CHECK: llvm.objc.release
// CHECK: llvm.objc.autoreleaseReturnValue
return z;
}
@interface Test37
+ alloc;
- init;
- (NSArray *) array;
@end
template <class T> void test37(T *a) {
for (id x in a.array) {
use(x);
}
}
extern template void test37<Test37>(Test37 *a);
template void test37<Test37>(Test37 *a);
// CHECK-LABEL: define weak_odr void @_Z6test37I6Test37EvPT_(
// CHECK: [[T2:%.*]] = call noundef ptr @objc_msgSend({{.*}} [ "clang.arc.attachedcall"(ptr @llvm.objc.retainAutoreleasedReturnValue) ]
// CHECK-NEXT: call void (...) @llvm.objc.clang.arc.noop.use({{.*}} [[T2]])
// Make sure it's not immediately released before starting the iteration.
// CHECK-NEXT: load ptr, ptr @OBJC_SELECTOR_REFERENCES_
// CHECK-NEXT: @objc_msgSend
// This bitcast is for the mutation check.
// CHECK: @objc_enumerationMutation
// This bitcast is for the 'next' message send.
// CHECK: load ptr, ptr @OBJC_SELECTOR_REFERENCES_
// CHECK-NEXT: @objc_msgSend
// This bitcast is for the final release.
// CHECK: call void @llvm.objc.release(ptr [[T2]])
template<typename T>
void send_release() {
[Test37 array];
}
// CHECK-LABEL: define weak_odr void @_Z12send_releaseIiEvv(
// CHECK: call noundef ptr @objc_msgSend{{.*}} [ "clang.arc.attachedcall"(ptr @llvm.objc.retainAutoreleasedReturnValue) ]
// CHECK-NEXT: call void (...) @llvm.objc.clang.arc.noop.use(
// CHECK-NEXT: call void @llvm.objc.release
// CHECK-NEXT: ret void
template void send_release<int>();
template<typename T>
Test37 *instantiate_init() {
Test37 *result = [[Test37 alloc] init];
return result;
}
// CHECK-LABEL: define weak_odr noundef ptr @_Z16instantiate_initIiEP6Test37v
// CHECK: call noundef ptr @objc_msgSend
// CHECK: call noundef ptr @objc_msgSend
// CHECK: call ptr @llvm.objc.retain
// CHECK: call void @llvm.objc.release
// CHECK: call ptr @llvm.objc.autoreleaseReturnValue
template Test37* instantiate_init<int>();
// Just make sure that the AST invariants hold properly here,
// i.e. that we don't crash.
// The block should get bound in the full-expression outside
// the statement-expression.
template <class T> class Test38 {
void test(T x) {
^{ (void) x; }, ({ x; });
}
};
// CHECK-LABEL: define weak_odr void @_ZN6Test38IiE4testEi(
template class Test38<int>;
class Test39_base1 {
virtual void foo();
};
class Test39_base2 {
virtual id bar();
};
class Test39 : Test39_base1, Test39_base2 { // base2 is at non-zero offset
virtual id bar();
};
id Test39::bar() { return 0; }
// Note lack of autorelease.
// CHECK-LABEL: define{{.*}} ptr @_ZThn8_N6Test393barEv(
// CHECK: call noundef ptr @_ZN6Test393barEv(
// CHECK-NEXT: ret ptr
// Just a basic correctness check that IR-gen still works after instantiating
// a non-dependent message send that requires writeback.
@interface Test40
+ (void) foo:(id *)errorPtr;
@end
template <class T> void test40_helper() {
id x;
[Test40 foo: &x];
};
template void test40_helper<int>();
// CHECK-LABEL: define weak_odr void @_Z13test40_helperIiEvv()
// CHECK: [[X:%.*]] = alloca ptr
// CHECK-NEXT: [[TEMP:%.*]] = alloca ptr
// CHECK-NEXT: call void @llvm.lifetime.start.p0(ptr [[X]])
// CHECK-NEXT: store ptr null, ptr [[X]]
// CHECK: [[T0:%.*]] = load ptr, ptr [[X]]
// CHECK-NEXT: store ptr [[T0]], ptr [[TEMP]]
// CHECK: @objc_msgSend
// CHECK-NEXT: [[T0:%.*]] = load ptr, ptr [[TEMP]]
// CHECK-NEXT: call ptr @llvm.objc.retain(ptr [[T0]])
// Check that moves out of __weak variables are compiled to use objc_moveWeak.
void test41(__weak id &&x) {
__weak id y = static_cast<__weak id &&>(x);
}
// CHECK-LABEL: define{{.*}} void @_Z6test41OU6__weakP11objc_object
// CHECK: [[X:%.*]] = alloca ptr
// CHECK: [[Y:%.*]] = alloca ptr
// CHECK: [[T0:%.*]] = load ptr, ptr [[X]]
// CHECK-NEXT: call void @llvm.objc.moveWeak(ptr [[Y]], ptr [[T0]])
// CHECK-NEXT: call void @llvm.objc.destroyWeak(ptr [[Y]])
void test42() {
__attribute__((ns_returns_retained)) id test42_0();
id test42_1(id);
void test42_2(id &&);
test42_2(test42_1(test42_0()));
}
// Check that the pointer returned by test42_0 is released after the full expression.
// CHECK-LABEL: define void @_Z6test42v()
// CHECK: %[[CALL:.*]] = call noundef ptr @_Z8test42_0v()
// CHECK: call void @_Z8test42_2OU15__autoreleasingP11objc_object(
// CHECK: call void @llvm.objc.release(ptr %[[CALL]])
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