JavaScriptCore-7601.1.46.3.tar.gz

[apple/javascriptcore.git] / dfg / DFGPromoteHeapAccess.h

diff --git a/dfg/DFGPromoteHeapAccess.h b/dfg/DFGPromoteHeapAccess.h
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+/*
+ * 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. 
+ */
+
+#ifndef DFGPromoteHeapAccess_h
+#define DFGPromoteHeapAccess_h
+
+#if ENABLE(DFG_JIT)
+
+#include "DFGNode.h"
+#include "DFGPromotedHeapLocation.h"
+
+namespace JSC { namespace DFG {
+
+template<typename WriteFunctor, typename ReadFunctor>
+void promoteHeapAccess(Node* node, const WriteFunctor& write, const ReadFunctor& read)
+{
+    switch (node->op()) {
+    case CheckStructure: {
+        if (node->child1()->isPhantomObjectAllocation())
+            read(PromotedHeapLocation(StructurePLoc, node->child1()));
+        break;
+    }
+    
+    case GetByOffset:
+    case GetGetterSetterByOffset: {
+        if (node->child2()->isPhantomObjectAllocation()) {
+            unsigned identifierNumber = node->storageAccessData().identifierNumber;
+            read(PromotedHeapLocation(NamedPropertyPLoc, node->child2(), identifierNumber));
+        }
+        break;
+    }
+
+    case MultiGetByOffset: {
+        if (node->child1()->isPhantomObjectAllocation()) {
+            unsigned identifierNumber = node->multiGetByOffsetData().identifierNumber;
+            read(PromotedHeapLocation(NamedPropertyPLoc, node->child1(), identifierNumber));
+        }
+        break;
+    }
+
+    case GetClosureVar:
+        if (node->child1()->isPhantomActivationAllocation())
+            read(PromotedHeapLocation(ClosureVarPLoc, node->child1(), node->scopeOffset().offset()));
+        break;
+
+    case SkipScope:
+        if (node->child1()->isPhantomActivationAllocation())
+            read(PromotedHeapLocation(ActivationScopePLoc, node->child1()));
+        break;
+
+    case GetScope:
+        if (node->child1()->isPhantomFunctionAllocation())
+            read(PromotedHeapLocation(FunctionActivationPLoc, node->child1()));
+        break;
+
+    case GetExecutable:
+        if (node->child1()->isPhantomFunctionAllocation())
+            read(PromotedHeapLocation(FunctionExecutablePLoc, node->child1()));
+        break;
+
+    case PutHint: {
+        ASSERT(node->child1()->isPhantomAllocation());
+        write(
+            PromotedHeapLocation(node->child1().node(), node->promotedLocationDescriptor()),
+            node->child2());
+        break;
+    }
+
+    default:
+        break;
+    }
+}
+
+} } // namespace JSC::DFG
+
+#endif // ENABLE(DFG_JIT)
+
+#endif // DFGPromoteHeapAccess_h
+