[PATCH] D128905: X86: don't fold swifterror load into anything

[Tim Northover via Phabricator via llvm-commits]

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Swifterror loads aren't what they seem because there's an implicit mini-mem2reg that happens during ISel, effectively removing the stack slot from existence. So it shouldn't be folded into any other arithmetic by FastISel either.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D128905

Files:
  llvm/lib/Target/X86/X86FastISel.cpp
  llvm/test/CodeGen/X86/swifterror.ll

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