Subversion Repositories openrisc_2011-10-31

/* Test for a bogus warning on comparison between signed and unsigned.

   Origin: Kaveh R. Ghazi <ghazi@caip.rutgers.edu> 5/13/2001.  */

/* { dg-do compile } */

/* { dg-options "-fshow-column -Wsign-compare -fstrict-overflow" } */

extern void bar(void);

int foo(int x, int y, unsigned u)

{

  /* A COMPOUND_EXPR is non-negative if the last element is known to

     be non-negative.  */

  if (u < (bar(), -1)) /*{ dg-warning "9:signed and unsigned" "COMPOUND_EXPR" }*/

    return x;

  if (u < (bar(), 10))

    return x;

  if ((bar(), 10) < u)

    return x;

  if (u < (x ? (bar(),bar(),bar(),bar(),x==y) : 10))

    return x;

  if ((x ? 10 : (bar(),bar(),bar(),bar(),x==y)) < u)

    return x;

  /* Test an ABS_EXPR, which is by definition non-negative when

     -fstrict-overflow is used.  */

  if (u < __builtin_abs(x))

    return x;

  if (__builtin_abs(x) < u)

    return x;

  if (u < (x ? __builtin_abs(x) : 10))

    return x;

  if ((x ? 10: __builtin_abs(x)) < u)

    return x;

  /* A MODIFY_EXPR is non-negative if the new value is known to be

     non-negative.  */

  if (u < (x = -1)) /* { dg-warning "9:signed and unsigned" "MODIFY_EXPR" } */

    return x;

  if (u < (x = 10))

    return x;

  if ((x = 10) < u)

    return x;

  if (u < (x = (y ? (x==y) : 10)))

    return x;

  if ((x = (y ? 10 : (x==y))) < u)

    return x;

  return 0;

}