[all-commits] [llvm/llvm-project] 3cd1e7: [llvm-objdump] Add -mllvm (#75892)

[Fangrui Song via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 3cd1e739095b3a0b01bf5445c0fcc212dcf62963
      https://github.com/llvm/llvm-project/commit/3cd1e739095b3a0b01bf5445c0fcc212dcf62963
  Author: Fangrui Song <i at maskray.me>
  Date:   2023-12-19 (Tue, 19 Dec 2023)

  Changed paths:
    M llvm/docs/CommandGuide/llvm-objdump.rst
    A llvm/test/tools/llvm-objdump/mllvm.s
    M llvm/tools/llvm-objdump/ObjdumpOpts.td
    M llvm/tools/llvm-objdump/llvm-objdump.cpp

  Log Message:
  -----------
  [llvm-objdump] Add -mllvm (#75892)

When llvm-objdump switched from cl:: to OptTable
(https://reviews.llvm.org/D100433), we dropped support for LLVM cl::
options. Some LLVM_DEBUG in `llvm/lib/Target/$target/MCDisassembler/`
files might be useful. Add -mllvm to allow dumping the information.

```
# -debug is available in an LLVM_ENABLE_ASSERTIONS=on build
llvm-objdump -d -mllvm -debug a.o > /dev/null
```

Link:
https://discourse.llvm.org/t/how-to-enable-debug-logs-in-llvm-objdump/75758