[llvm] [Exegesis] Do not assume the size and layout of the assembled snippet (PR #79636)

[Min-Yih Hsu via llvm-commits]

mshockwave wrote:

> Using the snippet file does exercise this path (as the assembly needs to be wrapped in setup code, duplicated/wrapped in a loop, and then emitted into an in-memory object file)

Good to know, thanks!

I'll merge this shortly.

https://github.com/llvm/llvm-project/pull/79636