llvm-project

ac467402 - [PGO] Preserve analysis results when nothing was instrumented

[PGO] Preserve analysis results when nothing was instrumented The 'PGOInstrumentationGen' pass should preserve all analysis results when nothing was actually instrumented. Currently, only modules that contain at least a single function definition are instrumented. When a module contains only function declarations and, optionally, global variable definitions (a module for the regular-LTO phase for thin-LTO when LTOUnit splitting is enabled, for example), such module is not instrumented (yet?) and there is no reason to invalidate any analysis results. NFC.