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/* { dg-do link } */

/* { dg-options "--param allow-store-data-races=0" } */

/* { dg-final { simulate-thread } } */

#include <stdio.h>

#include "../../gcc.dg/simulate-thread/simulate-thread.h"

/* Test that we don't store past VAR.A.  */

struct S

{

  volatile unsigned int a : 4;

  unsigned char b;

  unsigned int c : 6;

} var = { 1, 2, 3 };

static int global = 0;

/* Called before each instruction, simulating another thread

   executing.  */

void simulate_thread_other_threads()

{

  global++;

  var.b = global;

  /* Don't go past the 6 bits var.c can hold.  */

  var.c = global % 64;

}

/* Called after each instruction.  Returns 1 if any inconsistency is

   found, 0 otherwise.  */

int simulate_thread_step_verify()

{

  int ret = 0;

  if (var.b != global)

    {

      printf("FAIL: invalid intermediate value for <b>.\n");

      ret = 1;

    }

  if (var.c != global % 64)

    {

      printf("FAIL: invalid intermediate value for <c>.\n");

      ret = 1;

    }

  return ret;

}

/* Called at the end of the program (simulate_thread_fini == 1).  Verifies

   the state of the program and returns 1 if any inconsistency is

   found, 0 otherwise.  */

int simulate_thread_final_verify()

{

  if (var.a != 12)

    {

      printf("FAIL: invalid final result for <a>.\n");

      return 1;

    }

  return 0;

}

__attribute__((noinline))

void simulate_thread_main()

{

  var.a = 12;

}

int main()

{

  simulate_thread_main();

  simulate_thread_done();

  return 0;

}