[PATCH] D100639: [CodeGen] Improve code generation for clamping of constant indices with scalable vectors

[David Sherwood via Phabricator via llvm-commits]

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When trying to clamp a constant index into a scalable vector we can
test if the index is less than the minimum number of elements in the
vector. If so, we can simply return the index because we know it is
guaranteed to fit inside the vector.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D100639

Files:
  llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
  llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp
  llvm/test/CodeGen/AArch64/named-vector-shuffles-sve.ll
  llvm/test/CodeGen/AArch64/split-vector-insert.ll
  llvm/test/CodeGen/AArch64/sve-extract-vector.ll
  llvm/test/CodeGen/AArch64/sve-insert-vector.ll
  llvm/test/CodeGen/RISCV/rvv/fixed-vectors-insert-subvector.ll

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