view gcc/testsuite/g++.dg/opt/flifetime-dse2.C @ 158:494b0b89df80 default tip

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author Shinji KONO <kono@ie.u-ryukyu.ac.jp>
date Mon, 25 May 2020 18:13:55 +0900
parents 1830386684a0
children
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// { dg-options "-O3 -flifetime-dse" }
// { dg-do run }
// { dg-xfail-run-if "AIX operator new" { powerpc-ibm-aix* } }

typedef __SIZE_TYPE__ size_t;
inline void * operator new (size_t, void *p) { return p; }

struct A
{
  int i;
  A() {}
  ~A() {}
};

int main()
{
  int ar[1] = { 42 };
  A* ap = new(ar) A;

  // When the constructor starts the object has indeterminate value.
  if (ap->i == 42) __builtin_abort();

  ap->i = 42;
  ap->~A();

  // When the destructor ends the object no longer exists.
  if (ar[0] == 42) __builtin_abort();
}