[flang-commits] [flang] [flang] Region-based HLFIR operation for conditional expressions lowering (PR #194411)

[Caroline Newcombe via flang-commits]

cenewcombe wrote:

I rewrote `ConditionalOpConversion` to use `hlfir::createTempFromMold` instead of `createAndDeclareTemp` with a callback, which simplifies the conversion by deriving shape, length, and polymorphism from the mold directly. I also implemented the rest of Jean's suggestions. I don't mean to bloat the diff, but given the complexity of the bufferization logic I felt dedicated tests were needed — `bufferize-conditional.fir` covers the different code paths.

https://github.com/llvm/llvm-project/pull/194411