Subversion Repositories openrisc

/* Copyright (C) 2004 Free Software Foundation.

   Check that constant folding and RTL simplification of -(x >> y) doesn't

   break anything and produces the expected results.

   Written by Roger Sayle, 11th March 2004.  */

extern void abort (void);

#define INT_BITS  (sizeof(int)*8)

int test1(int x)

{

  return -(x >> (INT_BITS-1));

}

int test2(unsigned int x)

{

  return -((int)(x >> (INT_BITS-1)));

}

int test3(int x)

{

  int y;

  y = INT_BITS-1;

  return -(x >> y);

}

int test4(unsigned int x)

{

  int y;

  y = INT_BITS-1;

  return -((int)(x >> y));

}

int main()

{

  if (test1(0) != 0)

    abort ();

  if (test1(1) != 0)

    abort ();

  if (test1(-1) != 1)

    abort ();

  if (test2(0) != 0)

    abort ();

  if (test2(1) != 0)

    abort ();

  if (test2((unsigned int)-1) != -1)

    abort ();

  if (test3(0) != 0)

    abort ();

  if (test3(1) != 0)

    abort ();

  if (test3(-1) != 1)

    abort ();

  if (test4(0) != 0)

    abort ();

  if (test4(1) != 0)

    abort ();

  if (test4((unsigned int)-1) != -1)

    abort ();

  return 0;

}