webkitgtk-2.4.11webkitgtk-2.4.11

1 files changed, 0 insertions, 189 deletions

diff --git a/Source/JavaScriptCore/dfg/DFGMayExit.cpp b/Source/JavaScriptCore/dfg/DFGMayExit.cpp
deleted file mode 100644
index daa29339d..000000000
--- a/Source/JavaScriptCore/dfg/DFGMayExit.cpp
+++ /dev/null
@@ -1,189 +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 "DFGMayExit.h"
-
-#if ENABLE(DFG_JIT)
-
-#include "DFGGraph.h"
-#include "DFGNode.h"
-#include "Operations.h"
-
-namespace JSC { namespace DFG {
-
-namespace {
-
-class EdgeMayExit {
-public:
-    EdgeMayExit()
-        : m_result(false)
-    {
-    }
-    
-    void operator()(Node*, Edge edge)
-    {
-        // FIXME: Maybe this should call mayHaveTypeCheck(edge.useKind()) instead.
-        // https://bugs.webkit.org/show_bug.cgi?id=148545
-        if (edge.willHaveCheck()) {
-            m_result = true;
-            return;
-        }
-
-        switch (edge.useKind()) {
-        // These are shady because nodes that have these use kinds will typically exit for
-        // unrelated reasons. For example CompareEq doesn't usually exit, but if it uses ObjectUse
-        // then it will.
-        case ObjectUse:
-        case ObjectOrOtherUse:
-            m_result = true;
-            break;
-            
-        // These are shady because they check the structure even if the type of the child node
-        // passes the StringObject type filter.
-        case StringObjectUse:
-        case StringOrStringObjectUse:
-            m_result = true;
-            break;
-            
-        default:
-            break;
-        }
-    }
-    
-    bool result() const { return m_result; }
-    
-private:
-    bool m_result;
-};
-
-} // anonymous namespace
-
-ExitMode mayExit(Graph& graph, Node* node)
-{
-    ExitMode result = DoesNotExit;
-    
-    switch (node->op()) {
-    // This is a carefully curated list of nodes that definitely do not exit. We try to be very
-    // conservative when maintaining this list, because adding new node types to it doesn't
-    // generally make things a lot better but it might introduce subtle bugs.
-    case SetArgument:
-    case JSConstant:
-    case DoubleConstant:
-    case Int52Constant:
-    case MovHint:
-    case SetLocal:
-    case Flush:
-    case Phantom:
-    case Check:
-    case Identity:
-    case GetLocal:
-    case LoopHint:
-    case Phi:
-    case Upsilon:
-    case ZombieHint:
-    case ExitOK:
-    case BottomValue:
-    case PutHint:
-    case PhantomNewObject:
-    case PutStack:
-    case KillStack:
-    case GetStack:
-    case GetCallee:
-    case GetArgumentCount:
-    case GetRestLength:
-    case GetScope:
-    case PhantomLocal:
-    case CountExecution:
-    case Jump:
-    case Branch:
-    case Unreachable:
-    case DoubleRep:
-    case Int52Rep:
-    case ValueRep:
-    case ExtractOSREntryLocal:
-    case LogicalNot:
-    case NotifyWrite:
-    case PutStructure:
-    case StoreBarrier:
-    case PutByOffset:
-    case PutClosureVar:
-        break;
-
-    case StrCat:
-    case Call:
-    case Construct:
-    case CallVarargs:
-    case ConstructVarargs:
-    case CallForwardVarargs:
-    case ConstructForwardVarargs:
-    case MaterializeCreateActivation:
-    case MaterializeNewObject:
-    case NewFunction:
-    case NewArrowFunction:
-    case NewGeneratorFunction:
-    case NewStringObject:
-    case CreateActivation:
-        result = ExitsForExceptions;
-        break;
-
-    default:
-        // If in doubt, return true.
-        return Exits;
-    }
-
-    EdgeMayExit functor;
-    DFG_NODE_DO_TO_CHILDREN(graph, node, functor);
-    if (functor.result())
-        result = Exits;
-    
-    return result;
-}
-
-} } // namespace JSC::DFG
-
-namespace WTF {
-
-using namespace JSC::DFG;
-
-void printInternal(PrintStream& out, ExitMode mode)
-{
-    switch (mode) {
-    case DoesNotExit:
-        out.print("DoesNotExit");
-        return;
-    case ExitsForExceptions:
-        out.print("ExitsForExceptions");
-        return;
-    case Exits:
-        out.print("Exits");
-        return;
-    }
-    RELEASE_ASSERT_NOT_REACHED();
-}
-
-} // namespace WTF
-
-#endif // ENABLE(DFG_JIT)