diff options
Diffstat (limited to 'compiler/rustc_mir_transform/src/coverage/graph.rs')
| -rw-r--r-- | compiler/rustc_mir_transform/src/coverage/graph.rs | 105 |
1 files changed, 2 insertions, 103 deletions
diff --git a/compiler/rustc_mir_transform/src/coverage/graph.rs b/compiler/rustc_mir_transform/src/coverage/graph.rs index f94dad4c8da..59b01ffec0f 100644 --- a/compiler/rustc_mir_transform/src/coverage/graph.rs +++ b/compiler/rustc_mir_transform/src/coverage/graph.rs @@ -1,12 +1,8 @@ -use super::Error; - use itertools::Itertools; -use rustc_data_structures::fx::FxHashMap; use rustc_data_structures::graph::dominators::{self, Dominators}; use rustc_data_structures::graph::{self, GraphSuccessors, WithNumNodes, WithStartNode}; use rustc_index::bit_set::BitSet; use rustc_index::{IndexSlice, IndexVec}; -use rustc_middle::mir::coverage::*; use rustc_middle::mir::{self, BasicBlock, BasicBlockData, Terminator, TerminatorKind}; use std::cmp::Ordering; @@ -15,10 +11,7 @@ use std::ops::{Index, IndexMut}; const ID_SEPARATOR: &str = ","; /// A coverage-specific simplification of the MIR control flow graph (CFG). The `CoverageGraph`s -/// nodes are `BasicCoverageBlock`s, which encompass one or more MIR `BasicBlock`s, plus a -/// `CoverageKind` counter (to be added by `CoverageCounters::make_bcb_counters`), and an optional -/// set of additional counters--if needed--to count incoming edges, if there are more than one. -/// (These "edge counters" are eventually converted into new MIR `BasicBlock`s.) +/// nodes are `BasicCoverageBlock`s, which encompass one or more MIR `BasicBlock`s. #[derive(Debug)] pub(super) struct CoverageGraph { bcbs: IndexVec<BasicCoverageBlock, BasicCoverageBlockData>, @@ -196,13 +189,6 @@ impl CoverageGraph { } #[inline(always)] - pub fn iter_enumerated_mut( - &mut self, - ) -> impl Iterator<Item = (BasicCoverageBlock, &mut BasicCoverageBlockData)> { - self.bcbs.iter_enumerated_mut() - } - - #[inline(always)] pub fn bcb_from_bb(&self, bb: BasicBlock) -> Option<BasicCoverageBlock> { if bb.index() < self.bb_to_bcb.len() { self.bb_to_bcb[bb] } else { None } } @@ -320,14 +306,12 @@ rustc_index::newtype_index! { #[derive(Debug, Clone)] pub(super) struct BasicCoverageBlockData { pub basic_blocks: Vec<BasicBlock>, - pub counter_kind: Option<CoverageKind>, - edge_from_bcbs: Option<FxHashMap<BasicCoverageBlock, CoverageKind>>, } impl BasicCoverageBlockData { pub fn from(basic_blocks: Vec<BasicBlock>) -> Self { assert!(basic_blocks.len() > 0); - Self { basic_blocks, counter_kind: None, edge_from_bcbs: None } + Self { basic_blocks } } #[inline(always)] @@ -345,80 +329,6 @@ impl BasicCoverageBlockData { &mir_body[self.last_bb()].terminator() } - pub fn set_counter(&mut self, counter_kind: CoverageKind) -> Result<Operand, Error> { - debug_assert!( - // If the BCB has an edge counter (to be injected into a new `BasicBlock`), it can also - // have an expression (to be injected into an existing `BasicBlock` represented by this - // `BasicCoverageBlock`). - self.edge_from_bcbs.is_none() || counter_kind.is_expression(), - "attempt to add a `Counter` to a BCB target with existing incoming edge counters" - ); - let operand = counter_kind.as_operand(); - if let Some(replaced) = self.counter_kind.replace(counter_kind) { - Error::from_string(format!( - "attempt to set a BasicCoverageBlock coverage counter more than once; \ - {self:?} already had counter {replaced:?}", - )) - } else { - Ok(operand) - } - } - - #[inline(always)] - pub fn counter(&self) -> Option<&CoverageKind> { - self.counter_kind.as_ref() - } - - #[inline(always)] - pub fn take_counter(&mut self) -> Option<CoverageKind> { - self.counter_kind.take() - } - - pub fn set_edge_counter_from( - &mut self, - from_bcb: BasicCoverageBlock, - counter_kind: CoverageKind, - ) -> Result<Operand, Error> { - if level_enabled!(tracing::Level::DEBUG) { - // If the BCB has an edge counter (to be injected into a new `BasicBlock`), it can also - // have an expression (to be injected into an existing `BasicBlock` represented by this - // `BasicCoverageBlock`). - if self.counter_kind.as_ref().is_some_and(|c| !c.is_expression()) { - return Error::from_string(format!( - "attempt to add an incoming edge counter from {from_bcb:?} when the target BCB already \ - has a `Counter`" - )); - } - } - let operand = counter_kind.as_operand(); - if let Some(replaced) = - self.edge_from_bcbs.get_or_insert_default().insert(from_bcb, counter_kind) - { - Error::from_string(format!( - "attempt to set an edge counter more than once; from_bcb: \ - {from_bcb:?} already had counter {replaced:?}", - )) - } else { - Ok(operand) - } - } - - #[inline] - pub fn edge_counter_from(&self, from_bcb: BasicCoverageBlock) -> Option<&CoverageKind> { - if let Some(edge_from_bcbs) = &self.edge_from_bcbs { - edge_from_bcbs.get(&from_bcb) - } else { - None - } - } - - #[inline] - pub fn take_edge_counters( - &mut self, - ) -> Option<impl Iterator<Item = (BasicCoverageBlock, CoverageKind)>> { - self.edge_from_bcbs.take().map(|m| m.into_iter()) - } - pub fn id(&self) -> String { format!("@{}", self.basic_blocks.iter().map(|bb| bb.index().to_string()).join(ID_SEPARATOR)) } @@ -448,17 +358,6 @@ impl BcbBranch { Self { edge_from_bcb, target_bcb: to_bcb } } - pub fn counter<'a>( - &self, - basic_coverage_blocks: &'a CoverageGraph, - ) -> Option<&'a CoverageKind> { - if let Some(from_bcb) = self.edge_from_bcb { - basic_coverage_blocks[self.target_bcb].edge_counter_from(from_bcb) - } else { - basic_coverage_blocks[self.target_bcb].counter() - } - } - pub fn is_only_path_to_target(&self) -> bool { self.edge_from_bcb.is_none() } |