llvm-project

e1aaee7e - [modules] Handle friend function that was a definition but became only a declaration during AST deserialization (#132214)

[modules] Handle friend function that was a definition but became only a declaration during AST deserialization (#132214) Fix for regression #130917, changes in #111992 were too broad. This change reduces scope of previous fix. Added `ExternalASTSource::wasThisDeclarationADefinition` to detect cases when FunctionDecl lost body due to declaration merges.