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https://github.com/capstone-engine/llvm-capstone.git
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158d72d728
Set the writable and dead_on_unwind attributes for sret arguments. These indicate that the argument points to writable memory (and it's legal to introduce spurious writes to it on entry to the function) and that the argument memory will not be used if the call unwinds. This enables additional MemCpyOpt/DSE/LICM optimizations.
176 lines
7.6 KiB
Objective-C
176 lines
7.6 KiB
Objective-C
// RUN: %clang_cc1 -triple arm64-apple-ios11 -fobjc-arc -fblocks -fobjc-runtime=ios-11.0 -emit-llvm -o - %s | FileCheck -check-prefix=ARM64 -check-prefix=COMMON %s
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// RUN: %clang_cc1 -triple thumbv7-apple-ios10 -fobjc-arc -fblocks -fobjc-runtime=ios-10.0 -emit-llvm -o - %s | FileCheck -check-prefix=COMMON %s
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// RUN: %clang_cc1 -triple x86_64-apple-macosx10.13 -fobjc-arc -fblocks -fobjc-runtime=macosx-10.13.0 -emit-llvm -o - %s | FileCheck -check-prefix=COMMON %s
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// RUN: %clang_cc1 -triple i386-apple-macosx10.13.0 -fobjc-arc -fblocks -fobjc-runtime=macosx-fragile-10.13.0 -emit-llvm -o - %s | FileCheck -check-prefix=COMMON %s
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typedef void (^BlockTy)(void);
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// COMMON: %[[STRUCT_WEAK:.*]] = type { i32, ptr }
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typedef struct {
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int f0;
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__weak id f1;
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} Weak;
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Weak getWeak(void);
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void calleeWeak(Weak);
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// ARM64: define{{.*}} void @test_constructor_destructor_Weak()
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// ARM64: %[[T:.*]] = alloca %[[STRUCT_WEAK]], align 8
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// ARM64: call void @__default_constructor_8_w8(ptr %[[T]])
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// ARM64: call void @__destructor_8_w8(ptr %[[T]])
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// ARM64: ret void
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// ARM64: define linkonce_odr hidden void @__default_constructor_8_w8(ptr noundef %[[DST:.*]])
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// ARM64: %[[DST_ADDR:.*]] = alloca ptr, align 8
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// ARM64: store ptr %[[DST]], ptr %[[DST_ADDR]], align 8
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// ARM64: %[[V0:.*]] = load ptr, ptr %[[DST_ADDR]], align 8
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// ARM64: %[[V2:.*]] = getelementptr inbounds i8, ptr %[[V0]], i64 8
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// ARM64: call void @llvm.memset.p0.i64(ptr align 8 %[[V2]], i8 0, i64 8, i1 false)
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// ARM64: define linkonce_odr hidden void @__destructor_8_w8(ptr noundef %[[DST:.*]])
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// ARM64: %[[DST_ADDR:.*]] = alloca ptr, align 8
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// ARM64: store ptr %[[DST]], ptr %[[DST_ADDR]], align 8
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// ARM64: %[[V0:.*]] = load ptr, ptr %[[DST_ADDR]], align 8
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// ARM64: %[[V2:.*]] = getelementptr inbounds i8, ptr %[[V0]], i64 8
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// ARM64: call void @llvm.objc.destroyWeak(ptr %[[V2]])
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@interface C
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- (void)m:(Weak)a;
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@end
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void test_constructor_destructor_Weak(void) {
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Weak t;
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}
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// ARM64: define{{.*}} void @test_copy_constructor_Weak(ptr noundef %{{.*}})
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// ARM64: call void @__copy_constructor_8_8_t0w4_w8(ptr %{{.*}}, ptr %{{.*}})
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// ARM64: call void @__destructor_8_w8(ptr %{{.*}})
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// ARM64: define linkonce_odr hidden void @__copy_constructor_8_8_t0w4_w8(ptr noundef %[[DST:.*]], ptr noundef %[[SRC:.*]])
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// ARM64: %[[DST_ADDR:.*]] = alloca ptr, align 8
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// ARM64: %[[SRC_ADDR:.*]] = alloca ptr, align 8
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// ARM64: store ptr %[[DST]], ptr %[[DST_ADDR]], align 8
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// ARM64: store ptr %[[SRC]], ptr %[[SRC_ADDR]], align 8
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// ARM64: %[[V0:.*]] = load ptr, ptr %[[DST_ADDR]], align 8
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// ARM64: %[[V1:.*]] = load ptr, ptr %[[SRC_ADDR]], align 8
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// ARM64: %[[V4:.*]] = load i32, ptr %[[V1]], align 8
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// ARM64: store i32 %[[V4]], ptr %[[V0]], align 8
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// ARM64: %[[V6:.*]] = getelementptr inbounds i8, ptr %[[V0]], i64 8
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// ARM64: %[[V9:.*]] = getelementptr inbounds i8, ptr %[[V1]], i64 8
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// ARM64: call void @llvm.objc.copyWeak(ptr %[[V6]], ptr %[[V9]])
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void test_copy_constructor_Weak(Weak *s) {
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Weak t = *s;
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}
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// ARM64: define{{.*}} void @test_copy_assignment_Weak(ptr noundef %{{.*}}, ptr noundef %{{.*}})
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// ARM64: call void @__copy_assignment_8_8_t0w4_w8(ptr %{{.*}}, ptr %{{.*}})
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// ARM64: define linkonce_odr hidden void @__copy_assignment_8_8_t0w4_w8(ptr noundef %[[DST:.*]], ptr noundef %[[SRC:.*]])
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// ARM64: %[[DST_ADDR:.*]] = alloca ptr, align 8
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// ARM64: %[[SRC_ADDR:.*]] = alloca ptr, align 8
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// ARM64: store ptr %[[DST]], ptr %[[DST_ADDR]], align 8
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// ARM64: store ptr %[[SRC]], ptr %[[SRC_ADDR]], align 8
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// ARM64: %[[V0:.*]] = load ptr, ptr %[[DST_ADDR]], align 8
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// ARM64: %[[V1:.*]] = load ptr, ptr %[[SRC_ADDR]], align 8
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// ARM64: %[[V4:.*]] = load i32, ptr %[[V1]], align 8
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// ARM64: store i32 %[[V4]], ptr %[[V0]], align 8
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// ARM64: %[[V6:.*]] = getelementptr inbounds i8, ptr %[[V0]], i64 8
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// ARM64: %[[V9:.*]] = getelementptr inbounds i8, ptr %[[V1]], i64 8
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// ARM64: %[[V11:.*]] = call ptr @llvm.objc.loadWeakRetained(ptr %[[V9]])
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// ARM64: %[[V12:.*]] = call ptr @llvm.objc.storeWeak(ptr %[[V6]], ptr %[[V11]])
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// ARM64: call void @llvm.objc.release(ptr %[[V11]])
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void test_copy_assignment_Weak(Weak *d, Weak *s) {
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*d = *s;
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}
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// ARM64: define internal void @__Block_byref_object_copy_(ptr noundef %0, ptr noundef %1)
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// ARM64: call void @__move_constructor_8_8_t0w4_w8(ptr %{{.*}}, ptr %{{.*}})
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// ARM64: define linkonce_odr hidden void @__move_constructor_8_8_t0w4_w8(ptr noundef %[[DST:.*]], ptr noundef %[[SRC:.*]])
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// ARM64: %[[DST_ADDR:.*]] = alloca ptr, align 8
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// ARM64: %[[SRC_ADDR:.*]] = alloca ptr, align 8
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// ARM64: store ptr %[[DST]], ptr %[[DST_ADDR]], align 8
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// ARM64: store ptr %[[SRC]], ptr %[[SRC_ADDR]], align 8
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// ARM64: %[[V0:.*]] = load ptr, ptr %[[DST_ADDR]], align 8
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// ARM64: %[[V1:.*]] = load ptr, ptr %[[SRC_ADDR]], align 8
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// ARM64: %[[V4:.*]] = load i32, ptr %[[V1]], align 8
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// ARM64: store i32 %[[V4]], ptr %[[V0]], align 8
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// ARM64: %[[V6:.*]] = getelementptr inbounds i8, ptr %[[V0]], i64 8
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// ARM64: %[[V9:.*]] = getelementptr inbounds i8, ptr %[[V1]], i64 8
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// ARM64: call void @llvm.objc.moveWeak(ptr %[[V6]], ptr %[[V9]])
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void test_move_constructor_Weak(void) {
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__block Weak t;
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BlockTy b = ^{ (void)t; };
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}
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// ARM64: define{{.*}} void @test_move_assignment_Weak(ptr noundef %{{.*}})
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// ARM64: call void @__move_assignment_8_8_t0w4_w8(ptr %{{.*}}, ptr %{{.*}})
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// ARM64: define linkonce_odr hidden void @__move_assignment_8_8_t0w4_w8(ptr noundef %[[DST:.*]], ptr noundef %[[SRC:.*]])
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// ARM64: %[[DST_ADDR:.*]] = alloca ptr, align 8
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// ARM64: %[[SRC_ADDR:.*]] = alloca ptr, align 8
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// ARM64: store ptr %[[DST]], ptr %[[DST_ADDR]], align 8
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// ARM64: store ptr %[[SRC]], ptr %[[SRC_ADDR]], align 8
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// ARM64: %[[V0:.*]] = load ptr, ptr %[[DST_ADDR]], align 8
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// ARM64: %[[V1:.*]] = load ptr, ptr %[[SRC_ADDR]], align 8
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// ARM64: %[[V4:.*]] = load i32, ptr %[[V1]], align 8
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// ARM64: store i32 %[[V4]], ptr %[[V0]], align 8
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// ARM64: %[[V6:.*]] = getelementptr inbounds i8, ptr %[[V0]], i64 8
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// ARM64: %[[V9:.*]] = getelementptr inbounds i8, ptr %[[V1]], i64 8
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// ARM64: %[[V11:.*]] = call ptr @llvm.objc.loadWeakRetained(ptr %[[V9]])
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// ARM64: %[[V12:.*]] = call ptr @llvm.objc.storeWeak(ptr %[[V6]], ptr %[[V11]])
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// ARM64: call void @llvm.objc.destroyWeak(ptr %[[V9]])
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// ARM64: call void @llvm.objc.release(ptr %[[V11]])
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void test_move_assignment_Weak(Weak *p) {
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*p = getWeak();
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}
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// COMMON: define{{.*}} void @test_parameter_Weak(ptr noundef %[[A:.*]])
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// COMMON: call void @__destructor_{{.*}}(ptr %[[A]])
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void test_parameter_Weak(Weak a) {
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}
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// COMMON: define{{.*}} void @test_argument_Weak(ptr noundef %[[A:.*]])
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// COMMON: %[[A_ADDR:.*]] = alloca ptr
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// COMMON: %[[AGG_TMP:.*]] = alloca %[[STRUCT_WEAK]]
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// COMMON: store ptr %[[A]], ptr %[[A_ADDR]]
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// COMMON: %[[V0:.*]] = load ptr, ptr %[[A_ADDR]]
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// COMMON: call void @__copy_constructor_{{.*}}(ptr %[[AGG_TMP]], ptr %[[V0]])
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// COMMON: call void @calleeWeak(ptr noundef %[[AGG_TMP]])
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// COMMON-NEXT: ret
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void test_argument_Weak(Weak *a) {
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calleeWeak(*a);
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}
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// COMMON: define{{.*}} void @test_return_Weak(ptr dead_on_unwind noalias writable sret(%[[STRUCT_WEAK]]) align {{.*}} %[[AGG_RESULT:.*]], ptr noundef %[[A:.*]])
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// COMMON: %[[A_ADDR:.*]] = alloca ptr
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// COMMON: store ptr %[[A]], ptr %[[A_ADDR]]
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// COMMON: %[[V0:.*]] = load ptr, ptr %[[A_ADDR]]
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// COMMON: call void @__copy_constructor_{{.*}}(ptr %[[AGG_RESULT]], ptr %[[V0]])
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// COMMON: ret void
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Weak test_return_Weak(Weak *a) {
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return *a;
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}
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// COMMON-LABEL: define{{.*}} void @test_null_receiver(
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// COMMON: %[[AGG_TMP:.*]] = alloca %[[STRUCT_WEAK]]
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// COMMON: br i1
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// COMMON: call void @objc_msgSend({{.*}}, ptr noundef %[[AGG_TMP]])
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// COMMON: br
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// COMMON: call void @__destructor_{{.*}}(ptr %[[AGG_TMP]])
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// COMMON: br
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void test_null_receiver(C *c) {
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[c m:getWeak()];
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}
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