Aliasing brokenness (Was: Re: [patch RFC] SH: Use FRAME_GROWS_DOWNWARD)

Andreas Schwab schwab@suse.de
Wed Jul 20 21:13:00 GMT 2005


Gabriel Dos Reis <gdr@integrable-solutions.net> writes:

> Is the conclusion that a presence of "potentially unused" union that
> contains two structures with the same prefix destroys non-aliasing
> assumptions?

IMHO the third example in 6.5.2.3 gives a strong hint at that.  AFAIU the
second fragment becomes valid as soon as declaration of the union is moved
before function f.

Andreas.

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Andreas Schwab, SuSE Labs, schwab@suse.de
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