[PATCH] D72246: [PoC][RISCV][LTO] Pass target-abi via module flag metadata (solution 2 )

[Kuan Hsu Chen (Zakk) via Phabricator via llvm-commits]

khchen created this revision.
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1. Support ABI checking with per function target-features

if users don't specific -mattr, the default target-feature come from IR attribute.

2. Enable LTO for RISCV
3. Init MCOptions.ABIName via module flag metadata
4. do some hack in RISCVAsmBackend


https://reviews.llvm.org/D72246

Files:
  clang/lib/CodeGen/CodeGenModule.cpp
  clang/lib/Driver/ToolChains/RISCVToolchain.cpp
  clang/lib/Driver/ToolChains/RISCVToolchain.h
  clang/test/CodeGen/riscv-metadata.c
  clang/test/Driver/gold-lto.c
  llvm/lib/Target/RISCV/AsmParser/RISCVAsmParser.cpp
  llvm/lib/Target/RISCV/MCTargetDesc/RISCVAsmBackend.h
  llvm/lib/Target/RISCV/MCTargetDesc/RISCVELFStreamer.cpp
  llvm/lib/Target/RISCV/MCTargetDesc/RISCVELFStreamer.h
  llvm/lib/Target/RISCV/RISCVISelLowering.cpp
  llvm/lib/Target/RISCV/RISCVTargetMachine.cpp
  llvm/lib/Target/RISCV/Utils/RISCVBaseInfo.cpp
  llvm/lib/Target/RISCV/Utils/RISCVBaseInfo.h
  llvm/test/CodeGen/RISCV/module-target-abi.ll
  llvm/test/CodeGen/RISCV/subtarget-features-std-ext.ll
  llvm/test/CodeGen/RISCV/subtarget-features-target-abi.ll

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