[PATCH] D152407: [AArch64] Merge LDRSWpre-LDRSWui pair into LDPSWpre.

[Zhuojia Shen via Phabricator via llvm-commits]

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This patch optimizes a pair of `LDRSWpre` and `LDRSWui` instructions into a single `LDPSWpre` instruction.  This is a missing case in D99272 <https://reviews.llvm.org/D99272>.

An MIR test is added to verify the optimization.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D152407

Files:
  llvm/lib/Target/AArch64/AArch64InstrInfo.cpp
  llvm/lib/Target/AArch64/AArch64LoadStoreOptimizer.cpp
  llvm/test/CodeGen/AArch64/ldrpre-ldr-merge.mir

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