aco: register allocation improvements and fix for subdword variables on non-SDWA instructions
This is a refactoring of RA in order to allow for subdword variables on non-SDWA instructions, i.e. instructions which read or write the lower bits of a register, or even write the full register despite only the lower bits will contain useful data.
The MR does additionally some refactoring to simplify things and contains small improvements:
PERCENTAGE DELTAS Shaders SGPRs VGPRs SpillSGPR SpillVGPR PrivVGPR Scratch CodeSize MaxWaves Waits
battlefront2 4566 -0.04 % -0.24 % . . . . . 0.07 % .
britannia 465 . -0.19 % . . . . -0.12 % . .
dark_souls_3 11975 -0.02 % 0.08 % . . . . -0.04 % . .
detroit_become_human 19417 . -0.04 % . . . . -0.07 % . .
deus_ex_md 8063 . . . . . . . . .
dirt4 4030 -0.04 % -0.04 % . . . . -0.05 % . .
doom 5775 -0.09 % -0.08 % . . . . -0.42 % 0.01 % .
dota2 985 . -0.28 % . . . . -0.20 % 0.04 % .
dow3 294 . -0.06 % . . . . 0.05 % . .
evilwithin_demo 740 . -0.39 % . . . . -0.16 % -0.03 % .
f12017 5462 . -0.04 % . . . . 0.01 % . .
gtav 2955 . -0.05 % . . . . -0.09 % . .
hitman 3131 -0.02 % . . . . . -0.04 % . .
madmax 922 . -0.20 % . . . . 0.01 % 0.08 % .
nier 7030 . -0.15 % . . . . -0.01 % -0.03 % .
redout 2488 . -0.05 % . . . . -0.04 % 0.01 % .
rottr 8039 . . . . . . 0.09 % . .
shadowofmordor 2055 . -0.10 % . . . . -0.02 % . .
sottr_demo 5620 0.04 % 0.03 % . . . . -0.09 % . .
strange_brigade 1412 . 0.17 % . . . . -0.08 % -0.06 % .
talos 782 . -0.04 % . . . . . 0.02 % .
thewitness 3150 . -0.03 % . . . . -0.21 % 0.03 % .
threekingdoms 887 . -0.08 % . . . . -0.23 % . .
warhammer2 1871 -0.03 % -0.05 % . . . . -0.15 % . .
worldofwarships 8536 . -0.06 % . . . . -0.06 % . .
youngblood 843 0.02 % -0.23 % . . . . -0.05 % -0.01 % .
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All affected 31536 -0.01 % -0.08 % . . . . -0.10 % 0.01 % .
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Total 111493 . -0.04 % . . . . -0.06 % . .