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Re: [PATCH] improve float to double on PPC a little


>>>>> Dale Johannesen writes:

> It would be good to teach hard register copyprop that SF->DF conversions
> are really copies, too; they can be removed freely. I've had the following
> patch in Apple's branch for some time, but don't know how to make it
> FSF-compliant.  (Might need adjustment now that we have 128-bit long
> doubles, haven't exercised it.)

	If this approach is correct, one could wrap the functionality in a
macro like

#ifdef TRULY_NOOP_FLOATEXTEND
#endif

... at least using the old style of GCC macros.

David


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