3 Commits

Author	SHA1	Message	Date
Andy Caldwell	0ca6c38cc2	Fix up run-coverage and coverage-map/status-quo tests	2023-09-08 12:46:23 +01:00
Zalathar	3141177995	Copy most of tests/run-coverage into tests/coverage-map/status-quo ... The output of these tests is too complicated to comfortably verify by hand, but we can still use them to observe changes to the underlying mappings produced by codegen/LLVM. If these tests fail due to non-coverage changes (e.g. in HIR-to-MIR lowering or MIR optimizations), it should usually be OK to just `--bless` them, as long as the `run-coverage` test suite still works.	2023-09-05 11:55:34 +10:00
Zalathar	004db4728b	Add test suite coverage-map to test coverage mappings emitted by LLVM ... We compile each test file to LLVM IR assembly, and then pass that IR to a dedicated program that can decode LLVM coverage maps and print them in a more human-readable format. We can then check that output against known-good snapshots. This test suite has some advantages over the existing `run-coverage` tests: - We can test coverage instrumentation without needing to run target binaries. - We can observe subtle improvements/regressions in the underlying coverage mappings that don't make a visible difference to coverage reports.	2023-09-05 11:55:17 +10:00