[all-commits] [llvm/llvm-project] 4c5066: [TargetLowering] Don't speculatively call ComputeN...

[Craig Topper via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 4c5066b0789d9c38d6362a684346b68261911d29
      https://github.com/llvm/llvm-project/commit/4c5066b0789d9c38d6362a684346b68261911d29
  Author: Craig Topper <craig.topper at sifive.com>
  Date:   2021-01-15 (Fri, 15 Jan 2021)

  Changed paths:
    M llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp

  Log Message:
  -----------
  [TargetLowering] Don't speculatively call ComputeNumSignBits. NFC

These methods are recursive so a little costly.

We only look at the result in one place in this function and it's
conditional. We also only need the second call if the first had
enough returned enough sign bits.