webkitgtk-2.4.11webkitgtk-2.4.11

1 files changed, 0 insertions, 149 deletions

diff --git a/Source/JavaScriptCore/dfg/DFGConstantHoistingPhase.cpp b/Source/JavaScriptCore/dfg/DFGConstantHoistingPhase.cpp
deleted file mode 100644
index 4a72f9505..000000000
--- a/Source/JavaScriptCore/dfg/DFGConstantHoistingPhase.cpp
+++ /dev/null
@@ -1,149 +0,0 @@
-/*
- * Copyright (C) 2015 Apple Inc. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
- * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
- * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
- * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
- * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
- * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
- * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
- */
-
-#include "config.h"
-#include "DFGConstantHoistingPhase.h"
-
-#if ENABLE(DFG_JIT)
-
-#include "DFGGraph.h"
-#include "DFGInsertionSet.h"
-#include "DFGPhase.h"
-#include "DFGPredictionPropagationPhase.h"
-#include "DFGVariableAccessDataDump.h"
-#include "JSCInlines.h"
-
-namespace JSC { namespace DFG {
-
-namespace {
-
-class ConstantHoistingPhase : public Phase {
-public:
-    ConstantHoistingPhase(Graph& graph)
-        : Phase(graph, "constant hoisting")
-    {
-    }
-    
-    bool run()
-    {
-        DFG_ASSERT(m_graph, nullptr, m_graph.m_form == SSA);
-        
-        m_graph.clearReplacements();
-        
-        HashMap<FrozenValue*, Node*> jsValues;
-        HashMap<FrozenValue*, Node*> doubleValues;
-        HashMap<FrozenValue*, Node*> int52Values;
-        
-        auto valuesFor = [&] (NodeType op) -> HashMap<FrozenValue*, Node*>& {
-            // Use a roundabout approach because clang thinks that this closure returning a
-            // reference to a stack-allocated value in outer scope is a bug. It's not.
-            HashMap<FrozenValue*, Node*>* result;
-            
-            switch (op) {
-            case JSConstant:
-                result = &jsValues;
-                break;
-            case DoubleConstant:
-                result = &doubleValues;
-                break;
-            case Int52Constant:
-                result = &int52Values;
-                break;
-            default:
-                DFG_CRASH(m_graph, nullptr, "Invalid node type in valuesFor()");
-                result = nullptr;
-                break;
-            }
-            
-            return *result;
-        };
-        
-        Vector<Node*> toFree;
-        
-        for (BasicBlock* block : m_graph.blocksInNaturalOrder()) {
-            unsigned sourceIndex = 0;
-            unsigned targetIndex = 0;
-            while (sourceIndex < block->size()) {
-                Node* node = block->at(sourceIndex++);
-                switch (node->op()) {
-                case JSConstant:
-                case DoubleConstant:
-                case Int52Constant: {
-                    HashMap<FrozenValue*, Node*>& values = valuesFor(node->op());
-                    auto result = values.add(node->constant(), node);
-                    if (result.isNewEntry)
-                        node->origin = m_graph.block(0)->at(0)->origin;
-                    else {
-                        node->setReplacement(result.iterator->value);
-                        toFree.append(node);
-                    }
-                    break;
-                }
-                default:
-                    block->at(targetIndex++) = node;
-                    break;
-                }
-            }
-            block->resize(targetIndex);
-        }
-        
-        // Insert the constants into the root block.
-        InsertionSet insertionSet(m_graph);
-        auto insertConstants = [&] (const HashMap<FrozenValue*, Node*>& values) {
-            for (auto& entry : values)
-                insertionSet.insert(0, entry.value);
-        };
-        insertConstants(jsValues);
-        insertConstants(doubleValues);
-        insertConstants(int52Values);
-        insertionSet.execute(m_graph.block(0));
-        
-        // Perform all of the substitutions. We want all instances of the removed constants to
-        // point at their replacements.
-        for (BasicBlock* block : m_graph.blocksInNaturalOrder()) {
-            for (Node* node : *block)
-                m_graph.performSubstitution(node);
-        }
-        
-        // And finally free the constants that we removed.
-        for (Node* node : toFree)
-            m_graph.m_allocator.free(node);
-        
-        return true;
-    }
-};
-
-} // anonymous namespace
-    
-bool performConstantHoisting(Graph& graph)
-{
-    SamplingRegion samplingRegion("DFG Constant Hoisting Phase");
-    return runPhase<ConstantHoistingPhase>(graph);
-}
-
-} } // namespace JSC::DFG
-
-#endif // ENABLE(DFG_JIT)
-