[all-commits] [llvm/llvm-project] f44079: [ISel] Add pattern matching for depositing subreg ...

[David Li via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: f44079db22036d0ade2cf3d2e5a24bde5d378efd
      https://github.com/llvm/llvm-project/commit/f44079db22036d0ade2cf3d2e5a24bde5d378efd
  Author: David Li <57157229+david-xl at users.noreply.github.com>
  Date:   2023-12-21 (Thu, 21 Dec 2023)

  Changed paths:
    M llvm/lib/Target/X86/X86InstrCompiler.td
    A llvm/test/CodeGen/X86/insert.ll

  Log Message:
  -----------
  [ISel] Add pattern matching for depositing subreg value (#75978)

Depositing value into the lowest byte/word is a common code pattern.
This patch improves the code generation for it to avoid redundant AND
and OR operations.