llvm-project

47c1abf4 - [flang][debug] Fix array lower bounds in derived type members. (#113183)

[flang][debug] Fix array lower bounds in derived type members. (#113183) The lower bound information for the array members of a derived type can't be obtained from the `DeclareOp`. It has to be extracted from the `TypeInfoOp`. That was left as FIXME in the code. This PR adds the missing functionality to fix the issue. I tried the following approaches before settling on the current one that is to generate `DITypeAttr` for array members right where the components are being processed. 1. Generate a temp XDeclareOp with the shift information obtained from the `TypeInfoOp`. This caused a few issues mostly related to `unrealized_conversion_cast`. 2. Change the shift operands in the `declOp` that was passed in the function before calling `convertType`. The code can be seen in the abcf031a8e5a02f0081e7f293858302e7bf47bec. It essentially looked like the following. It works correctly but I was not sure if temporarily changing the `declOp` is the safe thing to do. ``` mlir::OperandRange originalShift = declOp.getShift(); mlir::MutableOperandRange mutableOpRange = declOp.getShiftMutable(); mutableOpRange.assign(shiftOpers); elemTy = convertType(fieldTy, fileAttr, scope, declOp); mutableOpRange.assign(originalShift); ``` Fixes #113178.