[all-commits] [llvm/llvm-project] 641065: [Constant] Make Constant::getSplatValue return poi...

[Luke Lau via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 64106581b9d4f68eb4911c402b12b154d77a9eb0
      https://github.com/llvm/llvm-project/commit/64106581b9d4f68eb4911c402b12b154d77a9eb0
  Author: Luke Lau <luke at igalia.com>
  Date:   2025-05-29 (Thu, 29 May 2025)

  Changed paths:
    M llvm/lib/Analysis/ConstantFolding.cpp
    M llvm/lib/Analysis/TargetTransformInfo.cpp
    M llvm/lib/IR/Constants.cpp

  Log Message:
  -----------
  [Constant] Make Constant::getSplatValue return poison on poison (#141870)

This is a follow up from #141845. 

TargetTransformInfo::getOperandInfo needs to be updated to check for
undef values as otherwise a splat is considered a constant, and some
RISC-V cost model tests will start adding a cost to materialize the
constant.



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