[llvm] [llvm-profgen] Loading binary functions from .symtab when DWARF info is incomplete (PR #163654)

[Lei Wang via llvm-commits]

https://github.com/wlei-llvm commented:

Thanks for adding this feature! Maybe we can add a flag for this, there are multiple modes, presumably we only test on pseudo-probe mode, we could consider enabling it by default for pseudo-probe mode. And it would be also helpful to test this feature(flag on vs off). 

It'd be great to share some numbers in the PR summary, say how much perf is save for a overflow case.

https://github.com/llvm/llvm-project/pull/163654