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LibJS: Avoid unnecessary copies in MergeBlocks codegen pass

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This commit is contained in:
Ben Wiederhake 2021-12-24 21:38:33 +01:00 • committed by Andreas Kling
parent a1aea5b9e0
commit 0c365fdfd3
1 changed files with 9 additions and 9 deletions
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18
Userland/Libraries/LibJS/Bytecode/Pass/MergeBlocks.cpp
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@ -43,9 +43,9 @@ void MergeBlocks::perform(PassPipelineExecutable& executable)
}
}
if (auto cfg_entry = inverted_cfg.get(*entry.value.begin()); cfg_entry.has_value()) {
auto& predecssor_entry = *cfg_entry;
if (predecssor_entry.size() != 1)
if (auto cfg_iter = inverted_cfg.find(*entry.value.begin()); cfg_iter != inverted_cfg.end()) {
auto& predecessor_entry = cfg_iter->value;
if (predecessor_entry.size() != 1)
continue;
}
@ -99,10 +99,10 @@ void MergeBlocks::perform(PassPipelineExecutable& executable)
Vector<BasicBlock const*> successors { current_block };
for (;;) {
auto last = successors.last();
auto entry = cfg.get(last);
if (!entry.has_value())
auto entry = cfg.find(last);
if (entry == cfg.end())
break;
auto& successor = *entry->begin();
auto& successor = *entry->value.begin();
successors.append(successor);
auto it = blocks_to_merge.find(successor);
if (it == blocks_to_merge.end())
@ -112,10 +112,10 @@ void MergeBlocks::perform(PassPipelineExecutable& executable)
auto blocks_to_merge_copy = blocks_to_merge;
for (auto& last : blocks_to_merge) {
auto entry = cfg.get(last);
if (!entry.has_value())
auto entry = cfg.find(last);
if (entry == cfg.end())
continue;
auto successor = *entry->begin();
auto successor = *entry->value.begin();
if (auto it = successors.find(successor); !it.is_end()) {
successors.insert(it.index(), last);
blocks_to_merge_copy.remove(last);