[all-commits] [llvm/llvm-project] d49a89: Reapply [ConstantFold] Remove unnecessary BitCastC...

[Nikita Popov via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: d49a893cdbea0dd6f8fde7dc9f321b2e0d169bba
      https://github.com/llvm/llvm-project/commit/d49a893cdbea0dd6f8fde7dc9f321b2e0d169bba
  Author: Nikita Popov <npopov at redhat.com>
  Date:   2023-11-03 (Fri, 03 Nov 2023)

  Changed paths:
    M llvm/lib/IR/ConstantFold.cpp

  Log Message:
  -----------
  Reapply [ConstantFold] Remove unnecessary BitCastConstantVector() (NFCI)

ConstantFoldCastInstruction() already has generic code to perform
lane-wise casts for vectors. There is no need to repeate it
specifically for bitcasts.

However, we do need to keep the special case for vectors of -1,
which is not handled elsewhere.