[llvm] [PseudoProbe] Add switch to control illegal guid warnings (PR #174927)

[Tianle Liu via llvm-commits]

tianleliu wrote:

> Just curious, why is it supposed to have missing GUID in thin LTO mode?

Hi @e-kud https://jira.devtools.intel.com/browse/CMPLRLLVM-72590 FYI.
In a word, GUID of imported function would deliberately drop in thin lto importing stage.

https://github.com/llvm/llvm-project/pull/174927