[PATCH] D134891: [AArch64][GlobalISel] Implement another combine for shufflevector->AArch64 G_EXT.

[Amara Emerson via Phabricator via llvm-commits]

aemerson created this revision.
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This is a port of an existing optimization in AArch64 ISelLowering, handling a case when the same input vector can be used for both ext inputs.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D134891

Files:
  llvm/lib/Target/AArch64/GISel/AArch64PostLegalizerLowering.cpp
  llvm/test/CodeGen/AArch64/GlobalISel/postlegalizer-lowering-ext.mir

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