[PATCH] D63433: [RISCV] Add RISCV-specific TargetTransformInfo

[Sam Elliott via Phabricator via llvm-commits]

lenary updated this revision to Diff 205835.
lenary added a comment.

Address review feedback:

- Return `TCC_Free` in many more unknown cases, to prevent constant hoisting
- Only return `TCC_Free` for 12-bit immediates in arithmetic operations
- Use RISCVMatInt::getIntMatCost to accurately estimate materialisation cost
- Remove some useless lines and update comments and asserts.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D63433/new/

https://reviews.llvm.org/D63433

Files:
  llvm/lib/Target/RISCV/CMakeLists.txt
  llvm/lib/Target/RISCV/LLVMBuild.txt
  llvm/lib/Target/RISCV/RISCVTargetMachine.cpp
  llvm/lib/Target/RISCV/RISCVTargetMachine.h
  llvm/lib/Target/RISCV/RISCVTargetTransformInfo.cpp
  llvm/lib/Target/RISCV/RISCVTargetTransformInfo.h
  llvm/test/CodeGen/RISCV/imm-cse.ll
  llvm/test/Transforms/ConstantHoisting/RISCV/immediates.ll
  llvm/test/Transforms/ConstantHoisting/RISCV/lit.local.cfg

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