[PATCH] D34458: [TTI] Refine the cost of EXT in getUserCost()

[Haicheng Wu via Phabricator via llvm-commits]

haicheng created this revision.
Herald added subscribers: kristof.beyls, eraman, javed.absar, aemerson.

Now, getUserCost() only checks the src and dst types of EXT to decide it is free or not.  This change first checks the types, then calls isExtFreeImpl(), and check if EXT can form ExtLoad at last.  Currently, only AArch64 has customized implementation of isExtFreeImpl() to check if EXT can be folded into its use.  This patch just moves code around and calls existing APIs.


Repository:
  rL LLVM

https://reviews.llvm.org/D34458

Files:
  include/llvm/Analysis/TargetTransformInfo.h
  include/llvm/Analysis/TargetTransformInfoImpl.h
  include/llvm/CodeGen/BasicTTIImpl.h
  include/llvm/Target/TargetLowering.h
  lib/Analysis/TargetTransformInfo.cpp
  lib/CodeGen/CodeGenPrepare.cpp
  test/Transforms/Inline/AArch64/ext.ll

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