a2347baaec
Because references must be initialized using some evaluated expression, they must point to something, and a callee can assume the reference parameter is dereferenceable. Taking advantage of a new attribute just added to LLVM, mark them as such. Because dereferenceability in addrspace(0) implies nonnull in the backend, we don't need both attributes. However, we need to know the size of the object to use the dereferenceable attribute, so for incomplete types we still emit only nonnull. llvm-svn: 213386
115 lines
3.8 KiB
C++
115 lines
3.8 KiB
C++
// RUN: %clang_cc1 %s -fblocks -triple x86_64-apple-darwin -std=c++11 -emit-llvm -o - | FileCheck %s
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template <class T> void takeItByValue(T);
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void takeABlock(void (^)());
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// rdar://problem/11022704
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namespace test_int {
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void test() {
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const int x = 100;
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takeABlock(^{ takeItByValue(x); });
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// CHECK: call void @_Z13takeItByValueIiEvT_(i32 100)
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}
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}
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namespace test_int_ref {
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void test() {
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const int y = 200;
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const int &x = y;
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takeABlock(^{ takeItByValue(x); });
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// TODO: there's no good reason that this isn't foldable.
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// CHECK: call void @_Z13takeItByValueIiEvT_(i32 {{%.*}})
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}
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}
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namespace test_float {
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void test() {
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const float x = 1;
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takeABlock(^{ takeItByValue(x); });
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// CHECK: call void @_Z13takeItByValueIfEvT_(float 1.0
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}
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}
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namespace test_float_ref {
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void test() {
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const float y = 100;
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const float &x = y;
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takeABlock(^{ takeItByValue(x); });
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// TODO: there's no good reason that this isn't foldable.
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// CHECK: call void @_Z13takeItByValueIfEvT_(float {{%.*}})
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}
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}
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namespace test_complex_int {
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void test() {
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constexpr _Complex int x = 500;
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takeABlock(^{ takeItByValue(x); });
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// CHECK: store { i32, i32 } { i32 500, i32 0 },
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// CHECK: store i32 500,
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// CHECK-NEXT: store i32 0,
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// CHECK-NEXT: [[COERCE:%.*]] = bitcast
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// CHECK-NEXT: [[CVAL:%.*]] = load i64* [[COERCE]]
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// CHECK-NEXT: call void @_Z13takeItByValueICiEvT_(i64 [[CVAL]])
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}
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}
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namespace test_complex_int_ref {
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void test() {
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const _Complex int y = 100;
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const _Complex int &x = y;
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takeABlock(^{ takeItByValue(x); });
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// CHECK: call void @_Z13takeItByValueICiEvT_(i64
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}
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}
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namespace test_complex_int_ref_mutable {
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_Complex int y = 100;
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void test() {
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const _Complex int &x = y;
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takeABlock(^{ takeItByValue(x); });
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// CHECK: [[R:%.*]] = load i32* getelementptr inbounds ({ i32, i32 }* @_ZN28test_complex_int_ref_mutable1yE, i32 0, i32 0)
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// CHECK-NEXT: [[I:%.*]] = load i32* getelementptr inbounds ({ i32, i32 }* @_ZN28test_complex_int_ref_mutable1yE, i32 0, i32 1)
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// CHECK-NEXT: [[RSLOT:%.*]] = getelementptr inbounds { i32, i32 }* [[CSLOT:%.*]], i32 0, i32 0
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// CHECK-NEXT: [[ISLOT:%.*]] = getelementptr inbounds { i32, i32 }* [[CSLOT]], i32 0, i32 1
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// CHECK-NEXT: store i32 [[R]], i32* [[RSLOT]]
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// CHECK-NEXT: store i32 [[I]], i32* [[ISLOT]]
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// CHECK-NEXT: [[COERCE:%.*]] = bitcast { i32, i32 }* [[CSLOT]] to i64*
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// CHECK-NEXT: [[CVAL:%.*]] = load i64* [[COERCE]],
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// CHECK-NEXT: call void @_Z13takeItByValueICiEvT_(i64 [[CVAL]])
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}
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}
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// rdar://13295759
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namespace test_block_in_lambda {
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void takeBlock(void (^block)());
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// The captured variable has to be non-POD so that we have a copy expression.
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struct A {
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void *p;
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A(const A &);
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~A();
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void use() const;
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};
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void test(A a) {
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auto lambda = [a]() {
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takeBlock(^{ a.use(); });
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};
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lambda(); // make sure we emit the invocation function
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}
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// CHECK-LABEL: define internal void @"_ZZN20test_block_in_lambda4testENS_1AEENK3$_0clEv"(
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// CHECK: [[BLOCK:%.*]] = alloca [[BLOCK_T:<{.*}>]], align 8
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// CHECK: [[THIS:%.*]] = load [[LAMBDA_T:%.*]]**
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// CHECK: [[TO_DESTROY:%.*]] = getelementptr inbounds [[BLOCK_T]]* [[BLOCK]], i32 0, i32 5
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// CHECK: [[T0:%.*]] = getelementptr inbounds [[BLOCK_T]]* [[BLOCK]], i32 0, i32 5
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// CHECK-NEXT: [[T1:%.*]] = getelementptr inbounds [[LAMBDA_T]]* [[THIS]], i32 0, i32 0
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// CHECK-NEXT: call void @_ZN20test_block_in_lambda1AC1ERKS0_({{.*}}* [[T0]], {{.*}}* dereferenceable({{[0-9]+}}) [[T1]])
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// CHECK-NEXT: [[T0:%.*]] = bitcast [[BLOCK_T]]* [[BLOCK]] to void ()*
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// CHECK-NEXT: call void @_ZN20test_block_in_lambda9takeBlockEU13block_pointerFvvE(void ()* [[T0]])
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// CHECK-NEXT: call void @_ZN20test_block_in_lambda1AD1Ev({{.*}}* [[TO_DESTROY]])
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// CHECK-NEXT: ret void
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}
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