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lanemask
2013 Jun 19
1
[LLVMdev] Register coalescer and reg_sequence (virtual super-regs)
Was it the subreg lane masks / mapping that was added to address the missed
coalescing? This solution is nice, but I don't think it'll work for me. I
have 8-element vector registers that can be grouped into virtual super regs
for bulk save/restore, and as soon as I have more than 4 in a tuple, the
unsigned int used to hold the lane masks overflows and switches over to the
"bit 31 set