Zalathar 51e62a09a3 coverage: Remove -Zcoverage-options=no-mir-spans
This flag turned out to be less useful than anticipated, and interferes with
work towards expansion support.
2025-08-04 13:48:40 +10:00
..
2024-12-13 00:04:56 +00:00
2025-01-09 13:55:50 +01:00

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.