[llvm-branch-commits] X86: Add X86TargetLowering::isProfitableToHoist hook for immediate operands. (PR #141326)

[Nikita Popov via llvm-branch-commits]

nikic wrote:

@pcc I think using fsh should at least help to get a ror instead of the shr+shl+or.

Actually getting the value duplicated+sunk into each block is typically done in CGP, which has a bunch of related transforms. The most generic is probably tryToSinkFreeOperands driven by TTI.isProfitableToSinkOperands.

https://github.com/llvm/llvm-project/pull/141326