derek.holloway
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70 lines
3.1 KiB
Plaintext
70 lines
3.1 KiB
Plaintext
// RUN: %clang_cc1 -std=c++17 -triple x86_64-apple-darwin10 -emit-llvm -fobjc-arc -O0 -disable-llvm-passes -o - %s | FileCheck %s
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// Test for correct IR generation when binding ObjC ARC __strong rvalues
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// to const __autoreleasing references. Previously, this caused an assertion
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// failure in Qualifiers::addConsistentQualifiers.
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// The const id& parameter has implicit __autoreleasing lifetime.
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void take(const id&);
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// CHECK-LABEL: define{{.*}} void @_Z19test_rvalue_bindingv()
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// CHECK: [[OBJ:%.*]] = alloca ptr, align 8
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// CHECK: store ptr null, ptr [[OBJ]], align 8
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// CHECK: call void @_Z4takeRU15__autoreleasingKP11objc_object(ptr noundef nonnull align 8 dereferenceable(8) [[OBJ]])
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// CHECK: call void @llvm.objc.storeStrong(ptr [[OBJ]], ptr null)
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// CHECK: ret void
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void test_rvalue_binding() {
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id obj = nullptr;
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take(static_cast<id&&>(obj));
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}
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// CHECK-LABEL: define{{.*}} void @_Z19test_lvalue_bindingv()
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// CHECK: [[OBJ:%.*]] = alloca ptr, align 8
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// CHECK: store ptr null, ptr [[OBJ]], align 8
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// CHECK: call void @_Z4takeRU15__autoreleasingKP11objc_object(ptr noundef nonnull align 8 dereferenceable(8) [[OBJ]])
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// CHECK: call void @llvm.objc.storeStrong(ptr [[OBJ]], ptr null)
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// CHECK: ret void
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void test_lvalue_binding() {
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id obj = nullptr;
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take(obj);
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}
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// Test with fold expressions and perfect forwarding (original crash case).
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template <typename... Args>
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void call(Args... args) {
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(take(static_cast<Args&&>(args)), ...);
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}
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// CHECK-LABEL: define{{.*}} void @_Z20test_fold_expressionv()
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// CHECK: call void @_Z4callIJU8__strongP11objc_objectEEvDpT_(ptr noundef null)
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void test_fold_expression() {
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call<id>(nullptr);
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}
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// CHECK-LABEL: define{{.*}} void @_Z4callIJU8__strongP11objc_objectEEvDpT_(ptr noundef %args)
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// CHECK: [[ARGS_ADDR:%.*]] = alloca ptr, align 8
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// CHECK: store ptr null, ptr [[ARGS_ADDR]], align 8
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// CHECK: call void @llvm.objc.storeStrong(ptr [[ARGS_ADDR]], ptr %args)
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// CHECK: call void @_Z4takeRU15__autoreleasingKP11objc_object(ptr noundef nonnull align 8 dereferenceable(8) [[ARGS_ADDR]])
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// CHECK: call void @llvm.objc.storeStrong(ptr [[ARGS_ADDR]], ptr null)
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// CHECK: ret void
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// Test that binding a prvalue to an __autoreleasing rvalue reference emits
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// retain+autorelease (not retain+release), per ARC semantics for __autoreleasing.
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// CHECK-LABEL: define{{.*}} void @_Z32test_autoreleasing_rvalue_ref_prP11objc_object(ptr noundef %a)
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// CHECK: [[A_ADDR:%.*]] = alloca ptr, align 8
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// CHECK: [[R:%.*]] = alloca ptr, align 8
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// CHECK: [[REF_TMP:%.*]] = alloca ptr, align 8
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// CHECK: store ptr null, ptr [[A_ADDR]], align 8
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// CHECK: call void @llvm.objc.storeStrong(ptr [[A_ADDR]], ptr %a)
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// CHECK: [[LOAD:%.*]] = load ptr, ptr [[A_ADDR]], align 8
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// CHECK: [[RETAINED:%.*]] = call ptr @llvm.objc.retain(ptr [[LOAD]])
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// CHECK: [[AUTORELEASED:%.*]] = call ptr @llvm.objc.autorelease(ptr [[RETAINED]])
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// CHECK: store ptr [[AUTORELEASED]], ptr [[REF_TMP]], align 8
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// CHECK: store ptr [[REF_TMP]], ptr [[R]], align 8
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// CHECK: call void @llvm.objc.storeStrong(ptr [[A_ADDR]], ptr null)
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// CHECK: ret void
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void test_autoreleasing_rvalue_ref_pr(id a) {
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id __autoreleasing && r = id{a};
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}
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