fourthTier: Landing the initial FTL logic in a single commit to avoid spurious
broken builds.
git-svn-id: http://svn.webkit.org/repository/webkit/trunk@153121 268f45cc-cd09-0410-ab3c-d52691b4dbfc
diff --git a/Source/JavaScriptCore/ftl/FTLOSRExit.cpp b/Source/JavaScriptCore/ftl/FTLOSRExit.cpp
new file mode 100644
index 0000000..be56f82
--- /dev/null
+++ b/Source/JavaScriptCore/ftl/FTLOSRExit.cpp
@@ -0,0 +1,103 @@
+/*
+ * Copyright (C) 2013 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 "FTLOSRExit.h"
+
+#if ENABLE(FTL_JIT)
+
+#include "CodeBlock.h"
+#include "DFGBasicBlock.h"
+#include "DFGNode.h"
+#include "FTLExitArgument.h"
+#include "FTLExitArgumentList.h"
+#include "FTLJITCode.h"
+#include "Operations.h"
+
+namespace JSC { namespace FTL {
+
+using namespace DFG;
+
+OSRExit::OSRExit(
+ ExitKind exitKind, ValueFormat profileValueFormat,
+ MethodOfGettingAValueProfile valueProfile, CodeOrigin codeOrigin,
+ int lastSetOperand, unsigned numberOfArguments, unsigned numberOfLocals)
+ : OSRExitBase(exitKind, codeOrigin)
+ , m_profileValueFormat(profileValueFormat)
+ , m_valueProfile(valueProfile)
+ , m_patchableCodeOffset(0)
+ , m_lastSetOperand(lastSetOperand)
+ , m_values(numberOfArguments, numberOfLocals)
+{
+}
+
+CodeLocationJump OSRExit::codeLocationForRepatch(CodeBlock* ftlCodeBlock) const
+{
+ return CodeLocationJump(
+ reinterpret_cast<char*>(
+ ftlCodeBlock->getJITCode()->ftl()->exitThunks().dataLocation()) +
+ m_patchableCodeOffset);
+}
+
+void OSRExit::convertToForward(
+ BasicBlock* block, Node* currentNode, unsigned nodeIndex,
+ const FormattedValue &value, ExitArgumentList& arguments)
+{
+ Node* node;
+ Node* lastMovHint;
+ if (!doSearchForForwardConversion(block, currentNode, nodeIndex, !!value, node, lastMovHint))
+ return;
+
+ ASSERT(node->codeOrigin != currentNode->codeOrigin);
+
+ m_codeOrigin = node->codeOrigin;
+
+ if (!value)
+ return;
+
+ int overriddenOperand = lastMovHint->local();
+ m_lastSetOperand = overriddenOperand;
+
+ // Is the value for this operand being passed as an argument to the exit, or is
+ // it something else? If it's an argument already, then replace that argument;
+ // otherwise add another argument.
+ if (m_values[overriddenOperand].isArgument()) {
+ ExitArgument exitArgument = m_values[overriddenOperand].exitArgument();
+ arguments[exitArgument.argument()] = value.value();
+ m_values[overriddenOperand] = ExitValue::exitArgument(
+ exitArgument.withFormat(value.format()));
+ return;
+ }
+
+ unsigned argument = arguments.size();
+ arguments.append(value.value());
+ m_values[m_lastSetOperand] = ExitValue::exitArgument(
+ ExitArgument(value.format(), argument));
+}
+
+} } // namespace JSC::FTL
+
+#endif // ENABLE(FTL_JIT)
+
