llvm-project

f84b784d - [X86] LowerShiftByScalarImmediate - move shl(x,1) -> add(freeze(x),freeze(x)) to X86FixupInstTunings (#161007)

[X86] LowerShiftByScalarImmediate - move shl(x,1) -> add(freeze(x),freeze(x)) to X86FixupInstTunings (#161007) Avoid the shl(x,1) -> add(freeze(x),freeze(x)) if the shift-imm if legal, and leave it to X86FixupInstTunings. Helps avoid missed optimisations due to oneuse limits, avoids unnecessary freezes and allows AVX512 to fold to mi memory folding variants. Fixes #161006