Tracking Issue for `-Z verbose-asm`

This is a tracking issue for the -Z verbose-asm compiler flag, which emits backend-generated comments with the assembly.

MCP: https://github.com/rust-lang/compiler-team/issues/762

About tracking issues

Tracking issues are used to record the overall progress of implementation.
They are also used as hubs connecting to other relevant issues, e.g., bugs or open design questions.
A tracking issue is however not meant for large scale discussion, questions, or bug reports about a feature.
Instead, open a dedicated issue for the specific matter and add the relevant feature gate label.
Discussion comments will get marked as off-topic or deleted.
Repeated discussions on the tracking issue may lead to the tracking issue getting locked.

Steps

• Implement the MCP https://github.com/rust-lang/rust/issues/126802
• Adjust documentation (see instructions on rustc-dev-guide)
• Formatting for new syntax has been added to the Style Guide (nightly-style-procedure)
• Stabilization PR (see instructions on rustc-dev-guide)

Unresolved Questions

None at this time

Implementation history

• Original implementation as asm_comments at https://github.com/rust-lang/rust/pull/53290
• Adjusting to be in line with the MCP https://github.com/rust-lang/rust/issues/126802

Start with the linked MCP and the rustc-dev-guide instructions for documentation and stabilization. Review the remaining checklist items for -Z verbose-asm, including documentation, Style Guide formatting, and stabilization. Done means the unchecked documentation, style, and stabilization steps have been completed.