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Re: [PATCH] Document arithmetic overflow semantics

From: Nathan Sidwell <nathan at codesourcery dot com>
To: Joe Buck <jbuck at synopsys dot com>
Cc: Marcel Cox <marcel_cox at hotmail dot com>, gcc at gcc dot gnu dot org, gcc-patches at gcc dot gnu dot org
Date: Fri, 14 Feb 2003 18:23:42 +0000
Subject: Re: [PATCH] Document arithmetic overflow semantics
Organization: Codesourcery LLC
References: <Pine.LNX.4.44.0302131450560.9271-100000@nondot.org> <b2i6ni$sgt$1@main.gmane.org> <20030214101003.B16872@synopsys.com>

Joe Buck wrote:

For floating point, a signaling NaN can be used.  For integers,
0xdeadbeef or some such.

[ cases where gcc can't figure out that a variable is uninitialized ]

Despite the small cost, this could be a real help to some people...

It should be possible to turn the feature off.

turned on at -O0, off at other levels?

nathan

--
Nathan Sidwell    ::   http://www.codesourcery.com   ::     CodeSourcery LLC
         The voices in my head said this was stupid too
nathan@codesourcery.com : http://www.cs.bris.ac.uk/~nathan/ : nathan@acm.org

References:
- Re: [PATCH] Document arithmetic overflow semantics
  - From: Chris Lattner
- Re: [PATCH] Document arithmetic overflow semantics
  - From: Marcel Cox
- Re: [PATCH] Document arithmetic overflow semantics
  - From: Joe Buck

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