[all-commits] [llvm/llvm-project] 457660: [X86] Remove unnecessary isNullConstant in LowerSe...

[topperc via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: 457660683154014db4b649e852d152354844338a
      https://github.com/llvm/llvm-project/commit/457660683154014db4b649e852d152354844338a
  Author: Craig Topper <craig.topper at gmail.com>
  Date:   2020-02-20 (Thu, 20 Feb 2020)

  Changed paths:
    M llvm/lib/Target/X86/X86ISelLowering.cpp

  Log Message:
  -----------
  [X86] Remove unnecessary isNullConstant in LowerSelect. NFC

At this point in the code we know that Op1 or Op2 is
all ones. Y points to the other operand. In the case that
Op2 is zero, Op1 must be all ones and Y is Op2. The OR
ORs Y into Res. But if Y is 0 the OR will be folded away by
getNode so we don't need to check for it.