diff options
Diffstat (limited to 'compiler/optimizing/licm.cc')
| -rw-r--r-- | compiler/optimizing/licm.cc | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/compiler/optimizing/licm.cc b/compiler/optimizing/licm.cc index 7a1e06b951..5a0b89c90a 100644 --- a/compiler/optimizing/licm.cc +++ b/compiler/optimizing/licm.cc @@ -79,8 +79,15 @@ static void UpdateLoopPhisIn(HEnvironment* environment, HLoopInformation* info) void LICM::Run() { DCHECK(side_effects_.HasRun()); + // Only used during debug. - ArenaBitVector visited(graph_->GetArena(), graph_->GetBlocks().size(), false, kArenaAllocLICM); + ArenaBitVector* visited = nullptr; + if (kIsDebugBuild) { + visited = new (graph_->GetArena()) ArenaBitVector(graph_->GetArena(), + graph_->GetBlocks().size(), + false, + kArenaAllocLICM); + } // Post order visit to visit inner loops before outer loops. for (HPostOrderIterator it(*graph_); !it.Done(); it.Advance()) { @@ -109,10 +116,12 @@ void LICM::Run() { DCHECK(inner->IsInLoop()); if (inner->GetLoopInformation() != loop_info) { // Thanks to post order visit, inner loops were already visited. - DCHECK(visited.IsBitSet(inner->GetBlockId())); + DCHECK(visited->IsBitSet(inner->GetBlockId())); continue; } - visited.SetBit(inner->GetBlockId()); + if (kIsDebugBuild) { + visited->SetBit(inner->GetBlockId()); + } if (contains_irreducible_loop) { // We cannot licm in an irreducible loop, or in a natural loop containing an |