[PATCH] D135991: [AArch64] Fix cost model for `udiv` instruction when one of the operands is a uniform constant

[Zain Jaffal via Phabricator via llvm-commits]

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Currently the model over estimates the cost of a udiv instruction with one constant. The correct cost for a udiv instruction is
insert_cost * extract_cost * num_elements


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D135991

Files:
  llvm/lib/Target/AArch64/AArch64TargetTransformInfo.cpp
  llvm/test/Analysis/CostModel/AArch64/div.ll

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