llvm-project

a103b9b2 - [flang][lowering] fix vector subscripts in character elemental procedures (#156661)

[flang][lowering] fix vector subscripts in character elemental procedures (#156661) Fixes https://github.com/llvm/llvm-project/issues/145151 Character elemental procedures require evaluating the result specification expression outside of the elemental loops when the function result length is not a constant. This is needed so that the array result storage can be allocated before the evaluation if a storage is needed. Because the result specification expression may depend on inquires about the dummy argument (but not usages of values thanks to F2023 C15121), some representation of the dummy must be created. Since this is an elemental call, this requires providing an element, and not the whole array actual argument (we only care about the properties of such element it does not matter which element is being used). The previous code was creating the element with a type cast from the base array, but this did not work with vector subscripted arrays where the lowering representation is more complex. This caused a compiler assert to fire. Switch the code to only copy the properties that can be inquired from the actual argument to the mock dummy (length parameters, dynamic type and presence). A mock one address is used instead of addressing the actual argument before the loop (one is used instead of NULL so that presence inquiry will work as expected for OPTIONAL arguments).