wrong alias-analysis and strange x86-code

Geoff Keating geoffk@cygnus.com
Tue Oct 24 13:23:00 GMT 2000


Volker Barthelmann <vb@compilers.de> writes:

> First, gcc 2.95 seems to do overly optimistic type-based alias-analysis. In
> the example attached to this mail it apparently assumes that an expression
> p[x] cannot alias certain objects and generates wrong code. I've verified
> this problem also with the PPC-backend and -O or -O2. p[0] and *p seem to
> be handled better.

This appears to be fixed in the current development compiler, so it
should be fixed in the next release.

-- 
- Geoffrey Keating <geoffk@cygnus.com>


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