Advanced code coverage analysis

[Johan Engelen]

On Monday, 4 December 2017 at 20:33:56 UTC, thinwybk wrote:
> Hi everyone,
>
> as far as I know there is a statement coverage analyzer built 
> into DMD https://dlang.org/code_coverage.html . Are there code 
> coverage analyzers for D which support branch coverage and 
> other more advanced coverage metrics 
> https://en.wikipedia.org/wiki/Code_coverage ?

LDC's PGO output can be used for that. See [1]. Except that LDC 
does not yet output full source mappings for the counters 
(`-fcoverage-mapping`).
Because the DMD frontend rewrites code besides semantic analysis, 
it is problematic to create correct source mappings, and I have 
thusfar refrained from implementing that.
(For folks interested in contributing to LDC: it'd be a nice 
project to work on, with nice incremental steps. It's quite 
possible that there is already enough info in the IR for IR-based 
(instead of current PGO instrumentation) instrumentation/mapping 
to work well)

-Johan

[1] https://clang.llvm.org/docs/SourceBasedCodeCoverage.html