diff options
Diffstat (limited to 'compiler/rustc_mir_dataflow/src/debuginfo.rs')
-rw-r--r-- | compiler/rustc_mir_dataflow/src/debuginfo.rs | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/compiler/rustc_mir_dataflow/src/debuginfo.rs b/compiler/rustc_mir_dataflow/src/debuginfo.rs new file mode 100644 index 000000000..fd5e8cf29 --- /dev/null +++ b/compiler/rustc_mir_dataflow/src/debuginfo.rs @@ -0,0 +1,20 @@ +use rustc_index::bit_set::BitSet; +use rustc_middle::mir::visit::*; +use rustc_middle::mir::*; + +/// Return the set of locals that appear in debuginfo. +pub fn debuginfo_locals(body: &Body<'_>) -> BitSet<Local> { + let mut visitor = DebuginfoLocals(BitSet::new_empty(body.local_decls.len())); + for debuginfo in body.var_debug_info.iter() { + visitor.visit_var_debug_info(debuginfo); + } + visitor.0 +} + +struct DebuginfoLocals(BitSet<Local>); + +impl Visitor<'_> for DebuginfoLocals { + fn visit_local(&mut self, local: Local, _: PlaceContext, _: Location) { + self.0.insert(local); + } +} |