Subversion Repositories openrisc_2011-10-31

/* m-un-1.c: "un" for "uninitialized" */

/*

From: Jim Wilson <wilson@cygnus.com>

Date: Wed, 6 Jul 1994 13:11:47 -0700

To: dje@cygnus.com

Subject: Re: devo/gcc ChangeLog.fsf stmt.c

Cc: cvs-gcc@cygnus.com, tege@cygnus.com

        How about a test case?  :-)

Compile with -O -Wall and the broken compiler gives you:

tmp.c:6: warning: `k' might be used uninitialized in this function

The fixed compiler (and gcc 2.5.8) gives no warning.

This happens to fix a performance regression in the code generated for

while loops, but that is presumably much much harder to test for.

*/

/* { dg-do compile } */

/* { dg-options "-O -Wall" } */

int

sub ()

{

  int i = 0;

  int j = 0;

  int k;        /* { dg-bogus "`k' might be used uninitialized" "uninitialized warning regression" } */

  while (i == 0 && j == 0)

    {

      k = 10;

      i = sub ();

    }

  return k;

}