1 files changed, 0 insertions, 109 deletions
diff --git a/Source/JavaScriptCore/dfg/DFGStaticExecutionCountEstimationPhase.cpp b/Source/JavaScriptCore/dfg/DFGStaticExecutionCountEstimationPhase.cpp
deleted file mode 100644
index bb23a7b9f..000000000
--- a/Source/JavaScriptCore/dfg/DFGStaticExecutionCountEstimationPhase.cpp
+++ /dev/null
@@ -1,109 +0,0 @@
-/*
- * Copyright (C) 2014, 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 "DFGStaticExecutionCountEstimationPhase.h"
-
-#if ENABLE(DFG_JIT)
-
-#include "DFGBasicBlockInlines.h"
-#include "DFGGraph.h"
-#include "DFGNaturalLoops.h"
-#include "DFGPhase.h"
-#include "JSCInlines.h"
-
-namespace JSC { namespace DFG {
-
-class StaticExecutionCountEstimationPhase : public Phase {
-public:
-    StaticExecutionCountEstimationPhase(Graph& graph)
-        : Phase(graph, "static execution count estimation")
-    {
-    }
-    
-    bool run()
-    {
-        m_graph.ensureNaturalLoops();
-        
-        // Estimate basic block execution counts based on loop depth.
-        for (BlockIndex blockIndex = m_graph.numBlocks(); blockIndex--;) {
-            BasicBlock* block = m_graph.block(blockIndex);
-            if (!block)
-                continue;
-
-            block->executionCount = pow(10, m_graph.m_naturalLoops->loopDepth(block));
-        }
-        
-        // Estimate branch weights based on execution counts. This isn't quite correct. It'll
-        // assume that each block's conditional successor only has that block as its
-        // predecessor.
-        for (BlockIndex blockIndex = m_graph.numBlocks(); blockIndex--;) {
-            BasicBlock* block = m_graph.block(blockIndex);
-            if (!block)
-                continue;
-            
-            Node* terminal = block->terminal();
-            switch (terminal->op()) {
-            case Branch: {
-                BranchData* data = terminal->branchData();
-                applyCounts(data->taken);
-                applyCounts(data->notTaken);
-                break;
-            }
-                
-            case Switch: {
-                SwitchData* data = terminal->switchData();
-                for (unsigned i = data->cases.size(); i--;)
-                    applyCounts(data->cases[i].target);
-                applyCounts(data->fallThrough);
-                break;
-            }
-                
-            default:
-                break;
-            }
-        }
-        
-        return true;
-    }
-
-private:
-    void applyCounts(BranchTarget& target)
-    {
-        target.count = target.block->executionCount;
-    }
-};
-
-bool performStaticExecutionCountEstimation(Graph& graph)
-{
-    SamplingRegion samplingRegion("DFG Static Execution Count Estimation");
-    return runPhase<StaticExecutionCountEstimationPhase>(graph);
-}
-
-} } // namespace JSC::DFG
-
-#endif // ENABLE(DFG_JIT)
-
-