[PATCH] D76133: [ExpandMemCmp] Allow overlaping loads in the zero-relational case.

[Clement Courbet via Phabricator via llvm-commits]

courbet created this revision.
courbet added a reviewer: spatel.
Herald added a subscriber: hiraditya.
Herald added a project: LLVM.

This allows doing `memcmp(p, q, 7)` with 2 loads instead of a call to
memcmp.
This fixes part of PR45147.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D76133

Files:
  llvm/lib/Target/X86/X86TargetTransformInfo.cpp
  llvm/test/CodeGen/X86/memcmp-more-load-pairs.ll
  llvm/test/CodeGen/X86/memcmp.ll
  llvm/test/Transforms/ExpandMemCmp/X86/memcmp.ll

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