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coverage: Use a tracing span to group the parts of a sum-up expression

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Zalathar 2023-10-29 21:23:47 +11:00
parent 2f1be08473
commit 10c4734c79
1 changed files with 4 additions and 1 deletions
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5
compiler/rustc_mir_transform/src/coverage/counters.rs
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@ -374,8 +374,9 @@ impl<'a> MakeBcbCounters<'a> {
// counters and/or expressions of its incoming edges. This will recursively get or create // counters and/or expressions of its incoming edges. This will recursively get or create
// counters for those incoming edges first, then call `make_expression()` to sum them up, // counters for those incoming edges first, then call `make_expression()` to sum them up,
// with additional intermediate expressions as needed. // with additional intermediate expressions as needed.
let _sumup_debug_span = debug_span!("(preparing sum-up expression)").entered();
let mut predecessors = self.bcb_predecessors(bcb).to_owned().into_iter(); let mut predecessors = self.bcb_predecessors(bcb).to_owned().into_iter();
debug!("{bcb:?} has multiple incoming edges and will need a sum-up expression");
let first_edge_counter_operand = let first_edge_counter_operand =
self.get_or_make_edge_counter_operand(predecessors.next().unwrap(), bcb)?; self.get_or_make_edge_counter_operand(predecessors.next().unwrap(), bcb)?;
let mut some_sumup_edge_counter_operand = None; let mut some_sumup_edge_counter_operand = None;
@ -399,6 +400,8 @@ impl<'a> MakeBcbCounters<'a> {
Op::Add, Op::Add,
some_sumup_edge_counter_operand.unwrap(), some_sumup_edge_counter_operand.unwrap(),
); );
drop(_sumup_debug_span);
debug!("{bcb:?} gets a new counter (sum of predecessor counters): {counter_kind:?}"); debug!("{bcb:?} gets a new counter (sum of predecessor counters): {counter_kind:?}");
self.coverage_counters.set_bcb_counter(bcb, counter_kind) self.coverage_counters.set_bcb_counter(bcb, counter_kind)
} }