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Re: GCC optimizes integer overflow: bug or feature?


From: Paolo Bonzini
Subject: Re: GCC optimizes integer overflow: bug or feature?
Date: Fri, 22 Dec 2006 09:20:28 +0100
User-agent: Thunderbird 1.5.0.9 (Macintosh/20061207)


Or you can do, since elsewhere in the code you compute time_t_max:

  for (j = 1; j <= time_t_max / 2 + 1; j *= 2)

No, this does not work.  It would work to have:

  for (j = 1;;)
    {
      if (j > time_t_max / 2)
        break;
      j *= 2;
    }

Oops.

Paolo





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