compiler: add rudimentary support for multi-cond buffering #55

Job	Run time
pytest-ubuntu-py312-gcc12-cxxomp-adjoint	3s
pytest-ubuntu-py313-gcc14-omp-adjoint	5s
pytest-ubuntu-py311-gcc11-cxxnoomp-adjoint	2m 37s
pytest-osx-py312-clang-omp-base	2m 40s
pytest-docker-py310-gcc-omp-arm64-base	53s
pytest-ubuntu-py310-gcc14-omp-base	41s
pytest-ubuntu-py311-gcc10-noomp-base	2m 38s
pytest-docker-py310-gcc-omp-base	1s
pytest-docker-py310-gcc-omp-arm64-adjoint	2m 10s
pytest-ubuntu-py312-gcc12-cxxomp-base	2m 26s
pytest-ubuntu-py313-gcc14-omp-base	2m 26s
pytest-ubuntu-py312-gcc13-omp-base	1s
pytest-ubuntu-py310-gcc9-omp-base	2m 37s
pytest-ubuntu-py310-gcc9-omp-adjoint	2m 38s
pytest-ubuntu-py311-gcc11-cxxnoomp-base	2m 37s
pytest-ubuntu-py312-gcc13-omp-adjoint	1s
pytest-docker-py310-gcc-omp-adjoint	1s
pytest-ubuntu-py310-gcc14-omp-adjoint	1s
pytest-docker-py310-icx-omp-base	1s
pytest-ubuntu-py311-gcc10-noomp-adjoint	1s
pytest-docker-py310-icx-omp-adjoint	2m 26s
	27m 4s

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