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Re: help interpreting gcc 4.1.1 optimisation bug

andrew@walrond.org writes:
 > 
 > Well, my point above was that -strict-aliasing is included in -O2 and
 > my code works fine at -O2. Only -O3 causes problems, so I didn't expect
 > -fno-strict-aliasing to make any difference.

That doesn't follow at all.  -O3 exposes much more information to the
compiler, so it can do more optimization.  If the code is incorrect,
-O3 is more likely to provike problems.

Andrew.
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