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eff1884274
llvm-capstone/clang/test/CodeGenObjCXX/arc.mm
John McCall eff1884274 Under ARC, when we're passing the address of a strong variable 
to an out-parameter using the indirect-writeback conversion,
and we copied the current value of the variable to the temporary,
make sure that we register an intrinsic use of that value with
the optimizer so that the value won't get released until we have
a chance to retain it.

rdar://13195034

llvm-svn: 177813
2013-03-23 02:35:54 +00:00

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// RUN: %clang_cc1 -triple x86_64-apple-darwin10 -emit-llvm -fobjc-runtime-has-weak -fblocks -fobjc-arc -O2 -disable-llvm-optzns -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 [[NSARRAY:%.*]]* @_Z7nsarrayv()
void use(id);
// rdar://problem/9315552
// 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: [[T0:%.*]] = call i8* @_Z12test0_helperv()
// CHECK-NEXT: [[T1:%.*]] = call i8* @objc_retainAutoreleasedReturnValue(i8* [[T0]])
// CHECK-NEXT: [[T2:%.*]] = load i8*** {{%.*}}, align 8
// CHECK-NEXT: [[T3:%.*]] = call i8* @objc_storeWeak(i8** [[T2]], i8* [[T1]])
// CHECK-NEXT: [[T4:%.*]] = call i8* @objc_retain(i8* [[T3]])
// CHECK-NEXT: store i8* [[T4]], i8**
// CHECK-NEXT: call void @objc_release(i8* [[T1]])
id x = *wp = test0_helper();
// CHECK: [[T0:%.*]] = call i8* @_Z12test0_helperv()
// CHECK-NEXT: [[T1:%.*]] = call i8* @objc_retainAutoreleasedReturnValue(i8* [[T0]])
// CHECK-NEXT: [[T2:%.*]] = load i8*** {{%.*}}, align 8
// CHECK-NEXT: [[T3:%.*]] = call i8* @objc_storeWeak(i8** [[T2]], i8* [[T1]])
// CHECK-NEXT: [[T4:%.*]] = call i8* @objc_loadWeakRetained(i8** [[T2]])
// CHECK-NEXT: store i8* [[T4]], i8**
// CHECK-NEXT: call void @objc_release(i8* [[T1]])
id y = *wvp = test0_helper();
}
// rdar://problem/9320648
struct Test1_helper { Test1_helper(); };
@interface Test1 @end
@implementation Test1 { Test1_helper x; } @end
// CHECK: define internal i8* @"\01-[Test1 .cxx_construct]"(
// CHECK: call void @_ZN12Test1_helperC1Ev(
// CHECK-NEXT: load
// CHECK-NEXT: bitcast
// CHECK-NEXT: ret i8*
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: define void @_Z6test34i(
// CHECK: [[COND:%.*]] = alloca i32
// CHECK-NEXT: [[STRONG:%.*]] = alloca i8*
// CHECK-NEXT: [[WEAK:%.*]] = alloca i8*
// CHECK-NEXT: [[TEMP1:%.*]] = alloca i8*
// CHECK-NEXT: [[TEMP2:%.*]] = alloca i8*
// CHECK-NEXT: [[CONDCLEANUPSAVE:%.*]] = alloca i8*
// CHECK-NEXT: [[CONDCLEANUP:%.*]] = alloca i1
// CHECK-NEXT: store i32
// CHECK-NEXT: store i8* null, i8** [[STRONG]]
// CHECK-NEXT: call i8* @objc_initWeak(i8** [[WEAK]], i8* null)
// CHECK-NEXT: [[T0:%.*]] = load i32* [[COND]]
// CHECK-NEXT: [[T1:%.*]] = icmp ne i32 [[T0]], 0
// CHECK: [[ARG:%.*]] = phi i8**
// CHECK-NEXT: [[T0:%.*]] = icmp eq i8** [[ARG]], null
// CHECK-NEXT: [[T1:%.*]] = select i1 [[T0]], i8** null, i8** [[TEMP1]]
// CHECK-NEXT: br i1 [[T0]],
// CHECK: [[T0:%.*]] = load i8** [[ARG]]
// CHECK-NEXT: store i8* [[T0]], i8** [[TEMP1]]
// CHECK-NEXT: br label
// CHECK: [[W0:%.*]] = phi i8* [ [[T0]], {{%.*}} ], [ undef, {{%.*}} ]
// CHECK: call void @_Z11test34_sinkPU15__autoreleasingP11objc_object(i8** [[T1]])
// CHECK-NEXT: [[T0:%.*]] = icmp eq i8** [[ARG]], null
// CHECK-NEXT: br i1 [[T0]],
// CHECK: [[T0:%.*]] = load i8** [[TEMP1]]
// CHECK-NEXT: [[T1:%.*]] = call i8* @objc_retain(i8* [[T0]])
// CHECK-NEXT: call void (...)* @clang.arc.use(i8* [[W0]])
// CHECK-NEXT: [[T2:%.*]] = load i8** [[ARG]]
// CHECK-NEXT: store i8* [[T1]], i8** [[ARG]]
// CHECK-NEXT: call void @objc_release(i8* [[T2]])
// CHECK-NEXT: br label
// CHECK: [[T0:%.*]] = load i32* [[COND]]
// CHECK-NEXT: [[T1:%.*]] = icmp ne i32 [[T0]], 0
// CHECK: [[ARG:%.*]] = phi i8**
// CHECK-NEXT: [[T0:%.*]] = icmp eq i8** [[ARG]], null
// CHECK-NEXT: [[T1:%.*]] = select i1 [[T0]], i8** null, i8** [[TEMP2]]
// CHECK-NEXT: store i1 false, i1* [[CONDCLEANUP]]
// CHECK-NEXT: br i1 [[T0]],
// CHECK: [[T0:%.*]] = call i8* @objc_loadWeakRetained(i8** [[ARG]])
// CHECK-NEXT: store i8* [[T0]], i8** [[CONDCLEANUPSAVE]]
// CHECK-NEXT: store i1 true, i1* [[CONDCLEANUP]]
// CHECK-NEXT: store i8* [[T0]], i8** [[TEMP2]]
// CHECK-NEXT: br label
// CHECK: call void @_Z11test34_sinkPU15__autoreleasingP11objc_object(i8** [[T1]])
// CHECK-NEXT: [[T0:%.*]] = icmp eq i8** [[ARG]], null
// CHECK-NEXT: br i1 [[T0]],
// CHECK: [[T0:%.*]] = load i8** [[TEMP2]]
// CHECK-NEXT: call i8* @objc_storeWeak(i8** [[ARG]], i8* [[T0]])
// CHECK-NEXT: br label
// CHECK: call void @objc_destroyWeak(i8** [[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: define void @_Z6test3513Test35_HelperPS_
void test35(Test35_Helper x0, Test35_Helper *x0p) {
// CHECK: call i8* @_ZN13Test35_Helper11makeObject1Ev
// CHECK-NOT: call i8* @objc_retain
id obj1 = Test35_Helper::makeObject1();
// CHECK: call i8* @_ZN13Test35_Helper11makeObject2Ev
// CHECK-NOT: call i8* @objc_retain
id obj2 = x0.makeObject2();
// CHECK: call i8* @_ZN13Test35_Helper11makeObject2Ev
// CHECK-NOT: call i8* @objc_retain
id obj3 = x0p->makeObject2();
id (Test35_Helper::*pmf)() __attribute__((ns_returns_retained))
= &Test35_Helper::makeObject2;
// CHECK: call i8* %
// CHECK-NOT: call i8* @objc_retain
id obj4 = (x0.*pmf)();
// CHECK: call i8* %
// CHECK-NOT: call i8* @objc_retain
id obj5 = (x0p->*pmf)();
// CHECK: call void @objc_release
// CHECK: call void @objc_release
// CHECK: call void @objc_release
// CHECK: call void @objc_release
// CHECK: call void @objc_release
// CHECK-NEXT: ret void
}
// CHECK: define void @_Z7test35b13Test35_HelperPS_
void test35b(Test35_Helper x0, Test35_Helper *x0p) {
// CHECK: call i8* @_ZN13Test35_Helper11makeObject3Ev
// CHECK: call i8* @objc_retain
id obj1 = Test35_Helper::makeObject3();
// CHECK: call i8* @_ZN13Test35_Helper11makeObject4Ev
// CHECK: call i8* @objc_retain
id obj2 = x0.makeObject4();
// CHECK: call i8* @_ZN13Test35_Helper11makeObject4Ev
// CHECK: call i8* @objc_retain
id obj3 = x0p->makeObject4();
id (Test35_Helper::*pmf)() = &Test35_Helper::makeObject4;
// CHECK: call i8* %
// CHECK: call i8* @objc_retain
id obj4 = (x0.*pmf)();
// CHECK: call i8* %
// CHECK: call i8* @objc_retain
id obj5 = (x0p->*pmf)();
// CHECK: call void @objc_release
// CHECK: call void @objc_release
// CHECK: call void @objc_release
// CHECK: call void @objc_release
// CHECK: call void @objc_release
// CHECK-NEXT: ret void
}
// rdar://problem/9603128
// CHECK: define i8* @_Z6test36P11objc_object(
id test36(id z) {
// CHECK: objc_retain
// CHECK: objc_retain
// CHECK: objc_release
// CHECK: objc_autoreleaseReturnValue
return z;
}
// Template instantiation side of rdar://problem/9817306
@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: define weak_odr void @_Z6test37I6Test37EvPT_(
// CHECK: [[T0:%.*]] = call [[NSARRAY]]* bitcast (i8* (i8*, i8*, ...)* @objc_msgSend to [[NSARRAY]]* (i8*, i8*)*)(
// CHECK-NEXT: [[T1:%.*]] = bitcast [[NSARRAY]]* [[T0]] to i8*
// CHECK-NEXT: [[T2:%.*]] = call i8* @objc_retainAutoreleasedReturnValue(i8* [[T1]])
// CHECK-NEXT: [[COLL:%.*]] = bitcast i8* [[T2]] to [[NSARRAY]]*
// Make sure it's not immediately released before starting the iteration.
// CHECK-NEXT: load i8** @"\01L_OBJC_SELECTOR_REFERENCES_
// CHECK-NEXT: [[T0:%.*]] = bitcast [[NSARRAY]]* [[COLL]] to i8*
// CHECK-NEXT: @objc_msgSend
// This bitcast is for the mutation check.
// CHECK: [[T0:%.*]] = bitcast [[NSARRAY]]* [[COLL]] to i8*
// CHECK-NEXT: @objc_enumerationMutation
// This bitcast is for the 'next' message send.
// CHECK: [[T0:%.*]] = bitcast [[NSARRAY]]* [[COLL]] to i8*
// CHECK-NEXT: @objc_msgSend
// This bitcast is for the final release.
// CHECK: [[T0:%.*]] = bitcast [[NSARRAY]]* [[COLL]] to i8*
// CHECK-NEXT: call void @objc_release(i8* [[T0]])
template<typename T>
void send_release() {
[Test37 array];
}
// CHECK: define weak_odr void @_Z12send_releaseIiEvv(
// CHECK: call %0* bitcast (i8* (i8*, i8*, ...)* @objc_msgSend
// CHECK-NEXT: bitcast
// CHECK-NEXT: call i8* @objc_retainAutoreleasedReturnValue
// CHECK-NEXT: bitcast
// CHECK-NEXT: bitcast
// CHECK-NEXT: call void @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: define weak_odr %2* @_Z16instantiate_initIiEP6Test37v
// CHECK: call i8* bitcast (i8* (i8*, i8*, ...)* @objc_msgSend
// CHECK: call i8* bitcast (i8* (i8*, i8*, ...)* @objc_msgSend
// CHECK: call i8* @objc_retain
// CHECK: call void @objc_release
// CHECK: call i8* @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: define weak_odr void @_ZN6Test38IiE4testEi(
template class Test38<int>;
// rdar://problem/11964832
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: define i8* @_ZThn8_N6Test393barEv(
// CHECK: call i8* @_ZN6Test393barEv(
// CHECK-NEXT: ret i8*
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