[PATCH] D150240: [RISCV] RISCVELFTargetObjectFile: use 2-byte alignment for .text if RVC

[Fangrui Song via Phabricator via llvm-commits]

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For the "C" Standard Extension/Zca, D45560 <https://reviews.llvm.org/D45560> enabled 2-byte alignment for
assembly output (e.g. `clang -S a.c`) and D102052 <https://reviews.llvm.org/D102052> enabled 2-byte alignment for
assembly input and object file output (e.g. `clang -c a.s`).

This patch ports the behavior for non-assembly input and object file output by
adding RISCVELFTargetObjectFile::getTextSectionAlignment (e.g. `clang -c a.c`).


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D150240

Files:
  llvm/lib/Target/RISCV/MCTargetDesc/RISCVMCObjectFileInfo.cpp
  llvm/lib/Target/RISCV/MCTargetDesc/RISCVMCObjectFileInfo.h
  llvm/lib/Target/RISCV/RISCVTargetObjectFile.cpp
  llvm/lib/Target/RISCV/RISCVTargetObjectFile.h
  llvm/test/CodeGen/RISCV/align.ll

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