[PATCH] D136146: [Clang][LoongArch] Handle -march/-m{single,double,soft}-float/-mfpu options

[Lu Weining via Phabricator via cfe-commits]

SixWeining created this revision.
SixWeining added reviewers: xen0n, xry111, MaskRay, wangleiat, gonglingqin.
Herald added subscribers: StephenFan, atanasyan, hiraditya, arichardson, sdardis.
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SixWeining requested review of this revision.
Herald added projects: clang, LLVM.
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This patch adds options -march, -msingle-float, -mdouble-float,
-msoft-float and -mfpu for LoongArch.

Clang options `msingle_float` and `mdouble_float` are moved from
`m_mips_Features_Group` to `m_Group` because now more than targets use
them.

Reference:
https://github.com/loongson/LoongArch-Documentation/blob/main/docs/LoongArch-toolchain-conventions-EN.adoc

TODO: add -mtune.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D136146

Files:
  clang/include/clang/Basic/DiagnosticDriverKinds.td
  clang/include/clang/Driver/Options.td
  clang/lib/Driver/ToolChains/Arch/LoongArch.cpp
  clang/lib/Driver/ToolChains/Arch/LoongArch.h
  clang/lib/Driver/ToolChains/Clang.cpp
  clang/lib/Driver/ToolChains/Linux.cpp
  clang/test/Driver/loongarch-default-features.c
  clang/test/Driver/loongarch-march-error.c
  clang/test/Driver/loongarch-march.c
  clang/test/Driver/loongarch-mdouble-float.c
  clang/test/Driver/loongarch-mfpu-error.c
  clang/test/Driver/loongarch-mfpu.c
  clang/test/Driver/loongarch-msingle-float.c
  clang/test/Driver/loongarch-msoft-float.c
  llvm/include/llvm/Support/LoongArchTargetParser.def
  llvm/include/llvm/Support/LoongArchTargetParser.h
  llvm/lib/Support/CMakeLists.txt
  llvm/lib/Support/LoongArchTargetParser.cpp

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