diff options
Diffstat (limited to 'compiler/rustc_middle/src/query/mod.rs')
| -rw-r--r-- | compiler/rustc_middle/src/query/mod.rs | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/compiler/rustc_middle/src/query/mod.rs b/compiler/rustc_middle/src/query/mod.rs index d94efe2d7d6..478ac19d199 100644 --- a/compiler/rustc_middle/src/query/mod.rs +++ b/compiler/rustc_middle/src/query/mod.rs @@ -614,9 +614,16 @@ rustc_queries! { feedable } - /// Summarizes coverage IDs inserted by the `InstrumentCoverage` MIR pass - /// (for compiler option `-Cinstrument-coverage`), after MIR optimizations - /// have had a chance to potentially remove some of them. + /// Scans through a function's MIR after MIR optimizations, to prepare the + /// information needed by codegen when `-Cinstrument-coverage` is active. + /// + /// This includes the details of where to insert `llvm.instrprof.increment` + /// intrinsics, and the expression tables to be embedded in the function's + /// coverage metadata. + /// + /// FIXME(Zalathar): This query's purpose has drifted a bit and should + /// probably be renamed, but that can wait until after the potential + /// follow-ups to #136053 have settled down. /// /// Returns `None` for functions that were not instrumented. query coverage_ids_info(key: ty::InstanceKind<'tcx>) -> Option<&'tcx mir::coverage::CoverageIdsInfo> { |