[llvm-dev] XMMs unused

[Dangeti Tharun kumar via llvm-dev]

Hi,

I see that, in Greedy register allocation not all the XMM registers are
used(even there is a need) if there is a function call crossing the live
range.
There are spills which can be avoided just by using them.

The reason I see is the CCC declares XMMs are not callee saved. This means
they are caller saved, correct me if I am wrong.
Is the greedy RA intentionally not using XMMs in order to avoid saving and
restoring regs at call site?


-- 
Regards,
DTharun
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