[PowerPC] Use RegisterClassInfo::getRegPressureSetLimit
#120383
Merged
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RegisterClassInfo::getRegPressureSetLimit
is a wrapper ofTargetRegisterInfo::getRegPressureSetLimit
with some logics toadjust the limit by removing reserved registers.
It seems that we shouldn't use
TargetRegisterInfo::getRegPressureSetLimit
directly, just like the comment "This limit must be adjusted
dynamically for reserved registers" said.
Separate from #118787