[PATCH] D147978: [RISCV] Remove getCPUFeaturesExceptStdExt.

[Craig Topper via Phabricator via cfe-commits]

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This function was used to force +64bit or -64bit into the feature
string basd on -mcpu.

It's not entirely clear to me why this was needed.  This informationo
is redundant with the triple. RISCVTargetInfo::initFeatureMap
independently recomputes it from the triple for the feature map.

It is ultimately needed in the backend, but that should be handled
by RISCVSubtarget processing the CPU name.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D147978

Files:
  clang/lib/Driver/ToolChains/Arch/RISCV.cpp
  clang/test/Driver/riscv-cpus.c
  llvm/include/llvm/TargetParser/RISCVTargetParser.h
  llvm/lib/TargetParser/RISCVTargetParser.cpp

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