1 // Check that initialization of the only one memcpy-able struct member will not 2 // be performed twice after successful non-trivial initializtion of the second 3 // member. 4 // 5 // RUN: %clang_cc1 -triple x86_64-unknown-unknown -fexceptions -fcxx-exceptions -O0 -fno-elide-constructors -emit-llvm %s -o - | FileCheck %s 6 7 int globId = 0; 8 9 struct ImplicitCopy { 10 int id; 11 12 ImplicitCopy() { id = 10; } 13 ~ImplicitCopy() { id = 20; } 14 }; 15 16 struct ExplicitCopy { 17 int id; 18 19 ExplicitCopy() { id = 15; } 20 ExplicitCopy(const ExplicitCopy &x) { id = 25; } 21 ~ExplicitCopy() { id = 35; } 22 }; 23 24 struct Container { 25 ImplicitCopy o1; // memcpy-able member. 26 ExplicitCopy o2; // non-trivial initialization. 27 28 Container() { globId = 1000; } 29 ~Container() { globId = 2000; } 30 }; 31 32 int main() { 33 try { 34 Container c1; 35 // CHECK-DAG: call void @llvm.memcpy 36 // CHECK-DAG: declare void @llvm.memcpy 37 // CHECK-NOT: @llvm.memcpy 38 Container c2(c1); 39 40 return 2; 41 } 42 catch (...) { 43 return 1; 44 } 45 return 0; 46 } 47
