diff options
Diffstat (limited to 'compiler/rustc_codegen_ssa/src')
| -rw-r--r-- | compiler/rustc_codegen_ssa/src/mir/mod.rs | 4 | ||||
| -rw-r--r-- | compiler/rustc_codegen_ssa/src/traits/coverageinfo.rs | 5 |
2 files changed, 9 insertions, 0 deletions
diff --git a/compiler/rustc_codegen_ssa/src/mir/mod.rs b/compiler/rustc_codegen_ssa/src/mir/mod.rs index 0064c16f5d9..cf6e2e8d14c 100644 --- a/compiler/rustc_codegen_ssa/src/mir/mod.rs +++ b/compiler/rustc_codegen_ssa/src/mir/mod.rs @@ -259,6 +259,10 @@ pub fn codegen_mir<'a, 'tcx, Bx: BuilderMethods<'a, 'tcx>>( // Apply debuginfo to the newly allocated locals. fx.debug_introduce_locals(&mut start_bx); + // If the backend supports coverage, and coverage is enabled for this function, + // do any necessary start-of-function codegen (e.g. locals for MC/DC bitmaps). + start_bx.init_coverage(instance); + // The builders will be created separately for each basic block at `codegen_block`. // So drop the builder of `start_llbb` to avoid having two at the same time. drop(start_bx); diff --git a/compiler/rustc_codegen_ssa/src/traits/coverageinfo.rs b/compiler/rustc_codegen_ssa/src/traits/coverageinfo.rs index d1d813bd389..906d8b87d3b 100644 --- a/compiler/rustc_codegen_ssa/src/traits/coverageinfo.rs +++ b/compiler/rustc_codegen_ssa/src/traits/coverageinfo.rs @@ -3,6 +3,11 @@ use rustc_middle::mir::coverage::CoverageKind; use rustc_middle::ty::Instance; pub trait CoverageInfoBuilderMethods<'tcx>: BackendTypes { + /// Performs any start-of-function codegen needed for coverage instrumentation. + /// + /// Can be a no-op in backends that don't support coverage instrumentation. + fn init_coverage(&mut self, _instance: Instance<'tcx>) {} + /// Handle the MIR coverage info in a backend-specific way. /// /// This can potentially be a no-op in backends that don't support |