[flang] [llvm] [mlir] [llvm][mlir][flang][OpenMP] Emit __atomic_load and __atomic_compare_exchange libcalls for complex types in atomic update (PR #92364)

[Daniel Chen via llvm-commits]

DanielCChen wrote:

@NimishMishra 
The test case `flang/test/Integration/OpenMP/atomic-capture-complex.f90` broke Flang buildbot on LoP https://lab.llvm.org/buildbot/#/builders/157

https://github.com/llvm/llvm-project/pull/92364