clang/test/CodeGenCXX/eh-aggregated-inits.cpp

   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 }