| // 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: call void @llvm.lifetime.start.p0(i64 16, ptr [[T1]]) |
| // |
| // CHECK: call void @llvm.lifetime.start.p0(i64 16, ptr [[T2]]) |
| // CHECK: [[T4:%.*]] = call noundef ptr @_ZN1TC1EPKc(ptr {{[^,]*}} [[T2]], ptr noundef @.str) |
| // |
| // CHECK: call void @llvm.lifetime.start.p0(i64 16, ptr [[T3]]) |
| // CHECK: [[T5:%.*]] = call noundef ptr @_ZN1TC1E1S(ptr {{[^,]*}} [[T3]], [2 x i32] %{{.*}}) |
| // |
| // CHECK: call void @_ZNK1T6concatERKS_(ptr dead_on_unwind writable sret(%class.T) align 4 [[T1]], ptr {{[^,]*}} [[T2]], ptr noundef nonnull align 4 dereferenceable(16) [[T3]]) |
| // CHECK: [[T6:%.*]] = call noundef ptr @_ZNK1T3strEv(ptr {{[^,]*}} [[T1]]) |
| // |
| // CHECK: call void @llvm.lifetime.end.p0( |
| // CHECK: call void @llvm.lifetime.end.p0( |
| // CHECK: call void @llvm.lifetime.end.p0( |
| // CHECK: ret ptr [[T6]] |
| |
| return T("[").concat(T(s)).str(); |
| } |
| |
| // CHECK: declare {{.*}}llvm.lifetime.start |
| // CHECK: declare {{.*}}llvm.lifetime.end |
