Title: [225362] trunk/Source
Revision
225362
Author
[email protected]
Date
2017-11-30 15:44:24 -0800 (Thu, 30 Nov 2017)

Log Message

[JSC] Remove easy toRemove & map.remove() use
https://bugs.webkit.org/show_bug.cgi?id=180208

Reviewed by Mark Lam.

Source/_javascript_Core:

In this patch, we replace Vector<> toRemove & map.remove loop with removeIf,
to optimize this common pattern. This patch only modifies apparent ones.
But we can apply this refactoring further to OAS phase in the future.

* b3/B3MoveConstants.cpp:
* dfg/DFGArgumentsEliminationPhase.cpp:
* dfg/DFGObjectAllocationSinkingPhase.cpp:
* wasm/WasmSignature.cpp:
(JSC::Wasm::SignatureInformation::tryCleanup):

Source/WTF:

Return bool from removeIf. It is true if removeIf removes at least one entry.
This interface is similar to existing HashSet::remove, which returns true
if it actually removes entry.

* wtf/HashMap.h:
(WTF::X>::removeIf):
* wtf/HashSet.h:
(WTF::V>::removeIf):
* wtf/HashTable.h:
(WTF::KeyTraits>::removeIf):

Modified Paths

Diff

Modified: trunk/Source/_javascript_Core/ChangeLog (225361 => 225362)


--- trunk/Source/_javascript_Core/ChangeLog	2017-11-30 23:39:14 UTC (rev 225361)
+++ trunk/Source/_javascript_Core/ChangeLog	2017-11-30 23:44:24 UTC (rev 225362)
@@ -1,3 +1,20 @@
+2017-11-30  Yusuke Suzuki  <[email protected]>
+
+        [JSC] Remove easy toRemove & map.remove() use
+        https://bugs.webkit.org/show_bug.cgi?id=180208
+
+        Reviewed by Mark Lam.
+
+        In this patch, we replace Vector<> toRemove & map.remove loop with removeIf,
+        to optimize this common pattern. This patch only modifies apparent ones.
+        But we can apply this refactoring further to OAS phase in the future.
+
+        * b3/B3MoveConstants.cpp:
+        * dfg/DFGArgumentsEliminationPhase.cpp:
+        * dfg/DFGObjectAllocationSinkingPhase.cpp:
+        * wasm/WasmSignature.cpp:
+        (JSC::Wasm::SignatureInformation::tryCleanup):
+
 2017-11-29  Yusuke Suzuki  <[email protected]>
 
         [JSC] Use getEffectiveAddress more in JSC

Modified: trunk/Source/_javascript_Core/b3/B3MoveConstants.cpp (225361 => 225362)


--- trunk/Source/_javascript_Core/b3/B3MoveConstants.cpp	2017-11-30 23:39:14 UTC (rev 225361)
+++ trunk/Source/_javascript_Core/b3/B3MoveConstants.cpp	2017-11-30 23:44:24 UTC (rev 225362)
@@ -342,10 +342,8 @@
     }
 
     Procedure& m_proc;
-    Vector<Value*> m_toRemove;
     HashMap<ValueKey, unsigned> m_constTable;
     int64_t* m_dataSection;
-    HashMap<ValueKey, Value*> m_constants;
     InsertionSet m_insertionSet;
 };
 

Modified: trunk/Source/_javascript_Core/dfg/DFGArgumentsEliminationPhase.cpp (225361 => 225362)


--- trunk/Source/_javascript_Core/dfg/DFGArgumentsEliminationPhase.cpp	2017-11-30 23:39:14 UTC (rev 225361)
+++ trunk/Source/_javascript_Core/dfg/DFGArgumentsEliminationPhase.cpp	2017-11-30 23:44:24 UTC (rev 225362)
@@ -192,20 +192,10 @@
     {
         bool changed;
         do {
-            changed = false;
-            Vector<Node*, 1> toRemove;
-
-            for (Node* candidate : m_candidates) {
-                if (!isStillValidCandidate(candidate))
-                    toRemove.append(candidate);
-            }
-
-            if (toRemove.size()) {
-                changed = true;
-                for (Node* node : toRemove)
-                    m_candidates.remove(node);
-            }
-
+            changed = m_candidates.removeIf(
+                [&] (Node* candidate) {
+                    return !isStillValidCandidate(candidate);
+                });
         } while (changed);
     }
 

Modified: trunk/Source/_javascript_Core/dfg/DFGObjectAllocationSinkingPhase.cpp (225361 => 225362)


--- trunk/Source/_javascript_Core/dfg/DFGObjectAllocationSinkingPhase.cpp	2017-11-30 23:39:14 UTC (rev 225361)
+++ trunk/Source/_javascript_Core/dfg/DFGObjectAllocationSinkingPhase.cpp	2017-11-30 23:44:24 UTC (rev 225362)
@@ -507,14 +507,10 @@
 
     void pruneByLiveness(const NodeSet& live)
     {
-        Vector<Node*> toRemove;
-        for (const auto& entry : m_pointers) {
-            if (!live.contains(entry.key))
-                toRemove.append(entry.key);
-        }
-        for (Node* node : toRemove)
-            m_pointers.remove(node);
-
+        m_pointers.removeIf(
+            [&] (const auto& entry) {
+                return !live.contains(entry.key);
+            });
         prune();
     }
 
@@ -682,15 +678,10 @@
         }
 
         // Remove unreachable allocations
-        {
-            Vector<Node*> toRemove;
-            for (const auto& entry : m_allocations) {
-                if (!reachable.contains(entry.key))
-                    toRemove.append(entry.key);
-            }
-            for (Node* identifier : toRemove)
-                m_allocations.remove(identifier);
-        }
+        m_allocations.removeIf(
+            [&] (const auto& entry) {
+                return !reachable.contains(entry.key);
+            });
     }
 
     bool m_reached = false;
@@ -1249,14 +1240,10 @@
     {
         // We don't create materializations if the escapee is not a
         // sink candidate
-        Vector<Node*> toRemove;
-        for (const auto& entry : escapees) {
-            if (!m_sinkCandidates.contains(entry.key))
-                toRemove.append(entry.key);
-        }
-        for (Node* identifier : toRemove)
-            escapees.remove(identifier);
-
+        escapees.removeIf(
+            [&] (const auto& entry) {
+                return !m_sinkCandidates.contains(entry.key);
+            });
         if (escapees.isEmpty())
             return;
 

Modified: trunk/Source/_javascript_Core/wasm/WasmSignature.cpp (225361 => 225362)


--- trunk/Source/_javascript_Core/wasm/WasmSignature.cpp	2017-11-30 23:39:14 UTC (rev 225361)
+++ trunk/Source/_javascript_Core/wasm/WasmSignature.cpp	2017-11-30 23:44:24 UTC (rev 225362)
@@ -144,20 +144,18 @@
     SignatureInformation& info = singleton();
     LockHolder lock(info.m_lock);
 
-    Vector<std::pair<SignatureIndex, Signature*>> toRemove;
-    for (const auto& pair : info.m_indexMap) {
-        const Ref<Signature>& signature = pair.value;
-        if (signature->refCount() == 1) {
-            // We're the only owner.
-            toRemove.append(std::make_pair(pair.key, signature.ptr()));
-        }
-    }
-    for (const auto& pair : toRemove) {
-        bool removed = info.m_signatureMap.remove(SignatureHash { pair.second });
-        ASSERT_UNUSED(removed, removed);
-        removed = info.m_indexMap.remove(pair.first);
-        ASSERT_UNUSED(removed, removed);
-    }
+    info.m_indexMap.removeIf(
+        [&] (const auto& pair) {
+            const Ref<Signature>& signature = pair.value;
+            if (signature->refCount() == 1) {
+                // We're the only owner.
+                bool removed = info.m_signatureMap.remove(SignatureHash { signature.ptr() });
+                ASSERT_UNUSED(removed, removed);
+                return true;
+            }
+            return false;
+        });
+
     if (info.m_signatureMap.isEmpty()) {
         ASSERT(info.m_indexMap.isEmpty());
         info.m_nextIndex = Signature::firstValidIndex;

Modified: trunk/Source/WTF/ChangeLog (225361 => 225362)


--- trunk/Source/WTF/ChangeLog	2017-11-30 23:39:14 UTC (rev 225361)
+++ trunk/Source/WTF/ChangeLog	2017-11-30 23:44:24 UTC (rev 225362)
@@ -1,3 +1,21 @@
+2017-11-30  Yusuke Suzuki  <[email protected]>
+
+        [JSC] Remove easy toRemove & map.remove() use
+        https://bugs.webkit.org/show_bug.cgi?id=180208
+
+        Reviewed by Mark Lam.
+
+        Return bool from removeIf. It is true if removeIf removes at least one entry.
+        This interface is similar to existing HashSet::remove, which returns true
+        if it actually removes entry.
+
+        * wtf/HashMap.h:
+        (WTF::X>::removeIf):
+        * wtf/HashSet.h:
+        (WTF::V>::removeIf):
+        * wtf/HashTable.h:
+        (WTF::KeyTraits>::removeIf):
+
 2017-11-30  Chris Dumez  <[email protected]>
 
         Populate self.registration.installing/waiting/active inside service workers

Modified: trunk/Source/WTF/wtf/HashMap.h (225361 => 225362)


--- trunk/Source/WTF/wtf/HashMap.h	2017-11-30 23:39:14 UTC (rev 225361)
+++ trunk/Source/WTF/wtf/HashMap.h	2017-11-30 23:44:24 UTC (rev 225362)
@@ -135,7 +135,7 @@
     bool remove(const KeyType&);
     bool remove(iterator);
     template<typename Functor>
-    void removeIf(Functor&&);
+    bool removeIf(Functor&&);
     void clear();
 
     MappedTakeType take(const KeyType&); // efficient combination of get with remove
@@ -443,9 +443,9 @@
 
 template<typename T, typename U, typename V, typename W, typename X>
 template<typename Functor>
-inline void HashMap<T, U, V, W, X>::removeIf(Functor&& functor)
+inline bool HashMap<T, U, V, W, X>::removeIf(Functor&& functor)
 {
-    m_impl.removeIf(std::forward<Functor>(functor));
+    return m_impl.removeIf(std::forward<Functor>(functor));
 }
 
 template<typename T, typename U, typename V, typename W, typename X>

Modified: trunk/Source/WTF/wtf/HashSet.h (225361 => 225362)


--- trunk/Source/WTF/wtf/HashSet.h	2017-11-30 23:39:14 UTC (rev 225361)
+++ trunk/Source/WTF/wtf/HashSet.h	2017-11-30 23:44:24 UTC (rev 225362)
@@ -105,7 +105,7 @@
     bool remove(const ValueType&);
     bool remove(iterator);
     template<typename Functor>
-    void removeIf(const Functor&);
+    bool removeIf(const Functor&);
     void clear();
 
     TakeType take(const ValueType&);
@@ -275,9 +275,9 @@
 
 template<typename T, typename U, typename V>
 template<typename Functor>
-inline void HashSet<T, U, V>::removeIf(const Functor& functor)
+inline bool HashSet<T, U, V>::removeIf(const Functor& functor)
 {
-    m_impl.removeIf(functor);
+    return m_impl.removeIf(functor);
 }
 
 template<typename T, typename U, typename V>

Modified: trunk/Source/WTF/wtf/HashTable.h (225361 => 225362)


--- trunk/Source/WTF/wtf/HashTable.h	2017-11-30 23:39:14 UTC (rev 225361)
+++ trunk/Source/WTF/wtf/HashTable.h	2017-11-30 23:44:24 UTC (rev 225362)
@@ -405,7 +405,7 @@
         void removeWithoutEntryConsistencyCheck(iterator);
         void removeWithoutEntryConsistencyCheck(const_iterator);
         template<typename Functor>
-        void removeIf(const Functor&);
+        bool removeIf(const Functor&);
         void clear();
 
         static bool isEmptyBucket(const ValueType& value) { return isHashTraitsEmptyValue<KeyTraits>(Extractor::extract(value)); }
@@ -1108,7 +1108,7 @@
 
     template<typename Key, typename Value, typename Extractor, typename HashFunctions, typename Traits, typename KeyTraits>
     template<typename Functor>
-    inline void HashTable<Key, Value, Extractor, HashFunctions, Traits, KeyTraits>::removeIf(const Functor& functor)
+    inline bool HashTable<Key, Value, Extractor, HashFunctions, Traits, KeyTraits>::removeIf(const Functor& functor)
     {
         // We must use local copies in case "functor" or "deleteBucket"
         // make a function call, which prevents the compiler from keeping
@@ -1134,6 +1134,7 @@
             shrink();
         
         internalCheckTableConsistency();
+        return removedBucketCount;
     }
 
     template<typename Key, typename Value, typename Extractor, typename HashFunctions, typename Traits, typename KeyTraits>
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