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Re: 20040309-1.c vs overflow being undefined
- From: Andreas Schwab <schwab at suse dot de>
- To: Andrew Pinski <pinskia at physics dot uc dot edu>
- Cc: gcc at gcc dot gnu dot org
- Date: Sun, 27 Nov 2005 18:13:34 +0100
- Subject: Re: 20040309-1.c vs overflow being undefined
- References: <200511271702.jARH2lb2016784@earth.phy.uc.edu>
Andrew Pinski <pinskia@physics.uc.edu> writes:
> x is promoted to a signed int by the front-end as the type
> of 32768 is signed. So when we pass 65535 to foo (like in the testcase),
> we get some large negative number for (signed int)x
I don't see how you can get a large negative number for that. With 16 bit
ints you'll get -1, but for anything bigger you'll keep 65535.
Andreas.
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Andreas Schwab, SuSE Labs, schwab@suse.de
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