As part of preparing for the switch to HLFIR lowering, all OpenMP FIR
lowering tests are moved to a subdirectory in the OpenMP directory.
Copies of these tests that work with HLFIR will be created during this
week. After the switch the FIR lowering tests will be removed.
All new tests should be added with the HLFIR flow.
Temporaries created to store worksharing loop index values were
using different types than that of the original index variables.
This caused invalid IR to be produced when an index variable was
used in binary operations which expected its original type.
Fix this by creating temporaries with the types of their original
variables and converting the loop values, that continue to use
the types that OpenMP runtime expects, to them.
Fixes https://github.com/llvm/llvm-project/issues/60870
Reviewed By: kiranchandramohan
Differential Revision: https://reviews.llvm.org/D156803
