[all-commits] [llvm/llvm-project] ad7214: [x86] add load folding restriction to pushAddIntoC...

[Sanjay Patel via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: ad7214f23dc3a088d73eb3974b146a0bb09d6ffd
      https://github.com/llvm/llvm-project/commit/ad7214f23dc3a088d73eb3974b146a0bb09d6ffd
  Author: Sanjay Patel <spatel at rotateright.com>
  Date:   2022-02-22 (Tue, 22 Feb 2022)

  Changed paths:
    M llvm/lib/Target/X86/X86ISelLowering.cpp
    M llvm/test/CodeGen/X86/add-cmov.ll

  Log Message:
  -----------
  [x86] add load folding restriction to pushAddIntoCmovOfConsts()

With only a load-fold the diffs look neutral. If there's a load and store (rmw)
fold opportunity as shown in the test based on #53862, then we end up with an
extra instruction.

Fixes #53862

Differential Revision: https://reviews.llvm.org/D120281