| // RUN: %clang_cc1 -triple armv7l-unknown-linux-gnueabihf -emit-llvm -O1 -disable-llvm-passes -std=c++03 %s -o - | FileCheck %s --implicit-check-not=llvm.lifetime |
| |
| class S { |
| char *ptr; |
| unsigned int len; |
| }; |
| |
| class T { |
| S left; |
| S right; |
| |
| public: |
| T(const char s[]); |
| T(S); |
| |
| T concat(const T &Suffix) const; |
| const char * str() const; |
| }; |
| |
| const char * f(S s) |
| { |
| // It's essential that the lifetimes of all three T temporaries here are |
| // overlapping. They must all remain alive through the call to str(). |
| // |
| // CHECK: [[T1:%.*]] = alloca %class.T, align 4 |
| // CHECK: [[T2:%.*]] = alloca %class.T, align 4 |
| // CHECK: [[T3:%.*]] = alloca %class.T, align 4 |
| // |
| // FIXME: We could defer starting the lifetime of the return object of concat |
| // until the call. |
| // CHECK: [[T1i8:%.*]] = bitcast %class.T* [[T1]] to i8* |
| // CHECK: call void @llvm.lifetime.start.p0i8(i64 16, i8* [[T1i8]]) |
| // |
| // CHECK: [[T2i8:%.*]] = bitcast %class.T* [[T2]] to i8* |
| // CHECK: call void @llvm.lifetime.start.p0i8(i64 16, i8* [[T2i8]]) |
| // CHECK: [[T4:%.*]] = call %class.T* @_ZN1TC1EPKc(%class.T* [[T2]], i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str, i32 0, i32 0)) |
| // |
| // CHECK: [[T3i8:%.*]] = bitcast %class.T* [[T3]] to i8* |
| // CHECK: call void @llvm.lifetime.start.p0i8(i64 16, i8* [[T3i8]]) |
| // CHECK: [[T5:%.*]] = call %class.T* @_ZN1TC1E1S(%class.T* [[T3]], [2 x i32] %{{.*}}) |
| // |
| // CHECK: call void @_ZNK1T6concatERKS_(%class.T* sret [[T1]], %class.T* [[T2]], %class.T* dereferenceable(16) [[T3]]) |
| // CHECK: [[T6:%.*]] = call i8* @_ZNK1T3strEv(%class.T* [[T1]]) |
| // |
| // CHECK: call void @llvm.lifetime.end.p0i8( |
| // CHECK: call void @llvm.lifetime.end.p0i8( |
| // CHECK: call void @llvm.lifetime.end.p0i8( |
| // CHECK: ret i8* [[T6]] |
| |
| return T("[").concat(T(s)).str(); |
| } |
| |
| // CHECK: declare {{.*}}llvm.lifetime.start |
| // CHECK: declare {{.*}}llvm.lifetime.end |
