================
@@ -546,6 +546,16 @@ TargetRegisterInfo::getRegSizeInBits(Register Reg,
return getRegSizeInBits(*RC);
}
+unsigned
+TargetRegisterInfo::getSubRegIdxFromLaneMask(LaneBitmask LaneMask) const {
----------------
cdevadas wrote:
`getCoveringSubRegIndexes` isn't useful at all. There is an early exit when the
LankeMask exactly matches to a SubReg index.
https://github.com/llvm/llvm-project/blob/main/llvm/lib/CodeGen/TargetRegisterInfo.cpp#L562
https://github.com/llvm/llvm-project/pull/174998
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