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Re: Register allocation issues
>>>>> Matt Lee writes:
Matt> The problem is, that though the loads can be optimized by pipelining
Matt> them. The register allocator has created a dependency by using only r3
Matt> and r4, instead of using the other volatiles.
GCC's register allocator currently is designed to minimize the
number of hard registers. As Ian mentioned, -frename-registers tries to
perform register renaming with available registers after register
allocation. As they say, "Your Mileage May Vary".
David