| The tests in this directory are shared by two different test modes, and can be | |
| run in multiple different ways: | |
| - `./x.py test coverage-map` (compiles to LLVM IR and checks coverage mappings) | |
| - `./x.py test coverage-run` (runs a test binary and checks its coverage report) | |
| - `./x.py test coverage` (runs both `coverage-map` and `coverage-run`) | |
| ## Maintenance note | |
| These tests can be sensitive to small changes in MIR spans or MIR control flow, | |
| especially in HIR-to-MIR lowering or MIR optimizations. | |
| If you haven't touched the coverage code directly, and the tests still pass in | |
| `coverage-run` mode, then it should usually be OK to just re-bless the mappings | |
| as necessary with `./x.py test coverage-map --bless`, without worrying too much | |
| about the exact changes. |