[llvm] [llvm-exegesis] Debug generated disassembly (PR #142540)

[Sjoerd Meijer via llvm-commits]

sjoerdmeijer wrote:

> Introduced back this as debug feature. `--debug-only="print-gen-assembly"` debugs the whole generated assembly snippet . `--debug-only=preview-gen-assembly` debugs the initial 10 instructions and ending 3 lines.

A last nit: it looks like we are only testing `--debug-only=preview-gen-assembly`, for completeness we should also test `--debug-only="print-gen-assembly"`. Can you write and add a test case for that one?  



https://github.com/llvm/llvm-project/pull/142540