dotnet/roslyn
Remove extraneous branch for empty strings in interpolated string handler CFG
Aberta
#57.611 aberto em 5 de nov. de 2021
Area-CompilersBugFeature - IOperationFeature - Interpolated String Improvementshelp wanted
Métricas do repositório
- Stars
- (20.414 estrelas)
- Métricas de merge de PR
- (Métricas PR pendentes)
Description
When an interpolated string handler is created for an empty string, and the constructor of the handler uses an out bool success parameter, we generate an unnecessary branch in the CFG for the code, demonstrated in the InterpolatedStringHandlerConversionFlow_16 test. We could take the approach Aleksey detailed in his review to remove that branch, but we will have to wire a CreateDiscardSymbol method through the semantic model to be able to create an IDiscardOperation for the parameter value. This is presently undone.