[PATCH] D143657: [Clang][RISCV] Guard vector float16 type correctly under Sema

[Yueh-Ting (eop) Chen via Phabricator via cfe-commits]

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Before this commit, vector float 16 types (e.g. `vfloat16m1_t`) of RVV
is only defined when extension `zvfh` is defined. However this
generate inaccurate diagnostics like:

  error: unknown type name 'vfloat16m1_t'

This commit improves the compiler by guarding type check correctly
under semantic analysis.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D143657

Files:
  clang/include/clang/AST/Type.h
  clang/include/clang/Basic/DiagnosticSemaKinds.td
  clang/include/clang/Basic/RISCVVTypes.def
  clang/include/clang/Basic/TargetInfo.h
  clang/lib/Basic/Targets/RISCV.h
  clang/lib/Sema/Sema.cpp
  clang/lib/Sema/SemaRISCVVectorLookup.cpp
  clang/test/Sema/riscv-vector-float16-check.c
  clang/utils/TableGen/RISCVVEmitter.cpp

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