Op Sun, 18 Sep 2011, schreef Florian Klämpfl:
I'am not sure if the ymm registers should be an own register class. After all, they are a superset of xmm
Exactly. Since if xmm0 is allocated, ymm0 is allocated too; the register allocator should treat them as a single register. xmm0 and ymm0 are a subregister of the same superregister.
Daniël
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