flang-compiler / f18-llvm-project

Fork of llvm/llvm-project for f18. In sync with f18-mlir and f18.
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[flang] Avoid raising a TODO in fir.boxproc rewrite when not needed #1560

Closed jeanPerier closed 2 years ago

jeanPerier commented 2 years ago

The pass was raising TODOs when a function both had a fir.boxproc<> argument and a fir.type<> argument (even if the fir.type<> did not contain a fir.boxproc itself).

Prevent the TODO from firing when a fir.type<> does not actually contain a fir.boxproc. Add the location for the remaining TODO (it will be needed when procedure pointer components are supported in lowering).

FYI, I actually tried to just implement the TODO, but I there is a funny issue. When creating the new fir::RecordType, since the name and context are the same as the type being translated, fir::RecordType:get just returns the existing type, and there is no way to change it (finalize() does nothing since it is already finalized). So this will require to add the ability to mutate the existing type, and I am not sure what are the MLIR constraints here, so I escaped and left the TODO for that case.