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[/] [openrisc/] [trunk/] [gnu-old/] [gcc-4.2.2/] [gcc/] [testsuite/] [gcc.dg/] [m-un-1.c] - Blame information for rev 816

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1 149 jeremybenn
/* m-un-1.c: "un" for "uninitialized" */
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/*
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From: Jim Wilson <wilson@cygnus.com>
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Date: Wed, 6 Jul 1994 13:11:47 -0700
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To: dje@cygnus.com
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Subject: Re: devo/gcc ChangeLog.fsf stmt.c
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Cc: cvs-gcc@cygnus.com, tege@cygnus.com
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        How about a test case?  :-)
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Compile with -O -Wall and the broken compiler gives you:
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tmp.c:6: warning: `k' might be used uninitialized in this function
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The fixed compiler (and gcc 2.5.8) gives no warning.
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This happens to fix a performance regression in the code generated for
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while loops, but that is presumably much much harder to test for.
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*/
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/* { dg-do compile } */
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/* { dg-options "-O -Wall" } */
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int
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sub ()
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{
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  int i = 0;
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  int j = 0;
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  int k;        /* { dg-bogus "`k' might be used uninitialized" "uninitialized warning regression" } */
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  while (i == 0 && j == 0)
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    {
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      k = 10;
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      i = sub ();
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    }
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  return k;
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}

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