tree 1fd74ad409262f556910897543eba2c91dfd49d4
parent 4186805060bb06dc3362707d45e6f0f826208a8f
author agozillon <Andrew.Gozillon@amd.com> 1738254816 +0100
committer GitHub <noreply@github.com> 1738254816 +0100
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[Flang][MLIR][OpenMP] Fix Target Data if (present(...)) causing LLVM-IR branching error (#123771)

Currently if we generate code for the below target data map that uses an
optional mapping:

       !$omp target data if(present(a)) map(alloc:a)
            do i = 1, 10
                a(i) = i
            end do
       !$omp end target data

We yield an LLVM-IR error as the branch for the else path is not
generated. This occurs because we enter the NoDupPriv path of the call
back function when generating the else branch, however, the emitBranch
function needs to be set to a block for it to functionally generate and
link in a follow up branch. The NoDupPriv path currently doesn't do
this, while it's not supposed to generate anything (as far as I am
aware) we still need to at least set the builders placement back so that
it emits the appropriate follow up branch. This avoids the missing
terminator LLVM-IR verification error by correctly generating the follow
up branch.