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Re: [PATCH] GCSE after reload - resubmit (SPECint +1.5% fp -0.5%).
> Do you have any figures on how many partially redundant loads this
> change affects? Presumably very few given the rare incidence of
> any problems.
I just compiled mainline as of Dec 31, 2003 or so with and without
Mostafa's patch on i686-pc-linux-gnu with -O3 -fomit-frame-pointer
-funroll-all-loops, the same set of options that caused a failure on
H8. The only difference was found in emit_prefetch_instructions() in
loop.c. I haven't analyzed if it's miscompiled or not, but it may
well be given the fact that Mostafa's fix did change something.
Anyway, the bug rarely triggers.