[Bug c++/27557] OpenMP threadprivate directive does not work with non-POD types

[yves.vandriessche at intel dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=27557

Yves Vandriessche <yves.vandriessche at intel dot com> changed:

           What    |Removed                     |Added
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                 CC|                            |yves.vandriessche at intel dot 
com

--- Comment #18 from Yves Vandriessche <yves.vandriessche at intel dot com> ---
As mentioned by Sameer, thread_local now works, but the threadprivate OpenMP
directive still fails with a "declared 'threadprivate' after first use" error.

My test fragment, is as follows. It should only print a single "ctor" and twice
the same set of distinct pointers:


#include <cstdio>
#include <omp.h>

struct Foo {
  Foo() {puts("ctor");}
  int a;
};

int bar() {
  int sum=0;
  // // alternative to omp threadprivate, works with gcc
  // thread_local Foo local;
#pragma omp parallel reduction(+:sum)
  {
    static Foo local;
    #pragma omp threadprivate(local)
    local.a = omp_get_thread_num();
    printf("%p\n", &local);
    sum += local.a;
  }
  printf("%d\n", sum);
  return sum;
}

int main(int argc, char** argv) {
  bar();
  bar();
  return 0;
}