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Re: Loop unrolling bug still present


> It was stated that in the second prerelease of GCC-3.3.4 from 30 May 2004
> the -funroll-loop miscompilation has been fixed.

One particular miscompilation (POOMA) with -funroll-loops on x86.

> That is true for the default option set.
>
> However, if you use the options
>
>     -O2 -funroll-loops --param max-unrolled-insns=xxx
>
> execution of memcpy-1.c will still fail for all xxx > 192
> (I only tested PowerPC target)

We should bar anyone from using non-default options ;-)

Please file a PR with bugzilla for this problem.

-- 
Eric Botcazou


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