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// { dg-do assemble  }

// { dg-options "-Wsign-conversion" }

// Copyright (C) 1999 Free Software Foundation, Inc.

// Contributed by Nathan Sidwell 21 Nov 1999 

// make sure we only warn on assigning a negative (signed) value

// to an unsigned type, and don't warn just if the unsigned value

// happens to have the top bit set.

typedef unsigned U;

void fn (unsigned);

void fu ()

{

  unsigned s1 = -1u;

  unsigned s2(-1u);

  unsigned volatile s3 = -1u;

  unsigned const s4 = -1u;

  unsigned const &s5(-1u);

  s1 = -1u;

  fn (-1u);

}

void fU ()

{

  U s1 = -1u;

  U s2(-1u);

  U volatile s3 = -1u;

  U const s4 = -1u;

  U const &s5(-1u);

  s1 = -1u;

  fn (-1u);

}

void fs ()

{

  unsigned s1 = -1;         // { dg-warning "" } initialization

  unsigned s2(-1);          // { dg-warning "" } initialization

  unsigned volatile s3 = -1;// { dg-warning "" } initialization

  unsigned const s4 = -1;   // { dg-warning "" } initialization

  unsigned const &s5(-1);   // { dg-warning "" } initialization

  s1 = -1;                  // { dg-warning "" } assignment

  fn (-1);                  // { dg-warning "" } passing

}

void fss ()

{

  unsigned s1 = -(-1);

  unsigned s2(-(-1));

  unsigned volatile s3 = -(-1);

  unsigned const s4 = -(-1);

  unsigned const &s5(-(-1));

  s1 = -(-1);

  fn (-(-1));

}

void fsz ()

{

  unsigned s1 = -0;

  unsigned s2(-0);

  unsigned volatile s3 = -0;

  unsigned const s4 = -0;

  unsigned const &s5(-0);

  s1 = -0;

  fn (-0);

}