[PATCH] D108993: [SVE] Fix the FP arithmetic instruction costs for SVE

[David Sherwood via Phabricator via llvm-commits]

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Several FP instructions (fadd, fsub, etc.) were incorrectly assigned
a higher cost for SVE because they have custom lowering, however we
know they are legal. This patch explicitly assigns a cost of 2 to
these opcodes.

Tests added here:

  Analysis/CostModel/AArch64/arith-fp-sve.ll


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D108993

Files:
  llvm/lib/Target/AArch64/AArch64TargetTransformInfo.cpp
  llvm/test/Analysis/CostModel/AArch64/arith-fp-sve.ll

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