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Re: GCC optimizes integer overflow: bug or feature?


From: Robert Dewar
Subject: Re: GCC optimizes integer overflow: bug or feature?
Date: Tue, 19 Dec 2006 06:18:46 -0500
User-agent: Thunderbird 1.5.0.8 (Windows/20061025)

Andrew Haley wrote:

 > I suspect the actual argument must be somewhere else.

I'm sure it is.  The only purpose of my mail was to clarify what I
meant by "nonstandard", which in this case was "not strictly
conforming".  I didn't intend to imply anything else.

But a compiler that implements wrap around IS strictly conforming.
A program that takes advantage of it is depending on non-standard
semantics, but then so is any program that uses floating-point and
expects it to have IEEE semantics to any extent.




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