cross-project-tests/debuginfo-tests/dexter-tests/nrvo.cpp

   1 // This ensures that DW_OP_deref is inserted when necessary, such as when NRVO
   2 // of a string object occurs in C++.
   3 //
   4 // REQUIRES: system-windows
   5 //
   6 // RUN: %clang_cl /Z7 /Zi %s -o %t
   7 // RUN: %dexter --fail-lt 1.0 -w --binary %t --debugger 'dbgeng' -- %s
   8
   9 struct string {
  10   string() {}
  11   string(int i) : i(i) {}
  12   ~string() {}
  13   int i = 0;
  14 };
  15 string get_string() {
  16   string unused;
  17   string result = 3;
  18   return result; // DexLabel('readresult1')
  19 }
  20 void some_function(int) {}
  21 struct string2 {
  22   string2() = default;
  23   string2(string2 &&other) { i = other.i; }
  24   int i;
  25 };
  26 string2 get_string2() {
  27   string2 result;
  28   result.i = 5;
  29   some_function(result.i);
  30   // Test that the debugger can get the value of result after another
  31   // function is called.
  32   return result; // DexLabel('readresult2')
  33 }
  34 int main() {
  35   get_string();
  36   get_string2();
  37 }
  38
  39 // DexExpectWatchValue('result.i', 3, on_line=ref('readresult1'))
  40 // DexExpectWatchValue('result.i', 5, on_line=ref('readresult2'))