[PATCH] D101986: [InstSimplify] Remove redundant {insert,extract}_vector intrinsic chains

[Joe Ellis via Phabricator via cfe-commits]

joechrisellis created this revision.
joechrisellis added reviewers: bsmith, DavidTruby, peterwaller-arm.
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This commit removes some redundant {insert,extract}_vector intrinsic
chains by implementing the following patterns as instsimplifies:

  (insert_vector _, (extract_vector X, 0), 0) -> X
  (extract_vector (insert_vector _, X, 0), 0) -> X


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D101986

Files:
  clang/test/CodeGen/attr-arm-sve-vector-bits-call.c
  clang/test/CodeGen/attr-arm-sve-vector-bits-cast.c
  llvm/lib/Analysis/InstructionSimplify.cpp
  llvm/test/Transforms/InstSimplify/extract-vector.ll
  llvm/test/Transforms/InstSimplify/insert-vector.ll

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