[PATCH] D129476: [AArch64][SVE] Prefer SIMD&FP variant of clast[ab]

[Cullen Rhodes via Phabricator via cfe-commits]

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The scalar variant with GPR source/dest has considerably higher latency
than the SIMD&FP scalar variant across a variety of micro-architectures:

  Core           Scalar    SIMD&FP
  --------------------------------
  Neoverse V1     9 cyc      3 cyc
  Neoverse N2     8 cyc      3 cyc
  Cortex A510     8 cyc      4 cyc


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D129476

Files:
  clang/test/CodeGen/aarch64-sve-intrinsics/acle_sve_clasta.c
  clang/test/CodeGen/aarch64-sve-intrinsics/acle_sve_clastb.c
  llvm/lib/Target/AArch64/AArch64TargetTransformInfo.cpp
  llvm/test/Transforms/InstCombine/AArch64/sve-intrinsic-opts-clast.ll

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