[all-commits] [llvm/llvm-project] 78084d: [ELF] Rewrite R_RISCV_ALIGN nops when r.addend%4 != 0

[Fangrui Song via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 78084d9e77b9a2017e2215491b71b37c2671c292
      https://github.com/llvm/llvm-project/commit/78084d9e77b9a2017e2215491b71b37c2671c292
  Author: Fangrui Song <i at maskray.me>
  Date:   2022-09-26 (Mon, 26 Sep 2022)

  Changed paths:
    M lld/ELF/Arch/RISCV.cpp
    M lld/test/ELF/riscv-relax-align-rvc.s

  Log Message:
  -----------
  [ELF] Rewrite R_RISCV_ALIGN nops when r.addend%4 != 0

For RVC, GNU assembler and LLVM integrated assembler add c.nop followed by a
sequence of 4-byte nops. Even if remove % 4 == 0, we have to split one 4-byte
nop and therefore need to write the code sequence, otherwise we create an
incorrect c.unimp.