webkitgtk-2.16.5HEADwebkitgtk-2.16.5master

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diff --git a/Source/JavaScriptCore/b3/B3StackmapGenerationParams.cpp b/Source/JavaScriptCore/b3/B3StackmapGenerationParams.cpp
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index 000000000..0a07e4e08
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+++ b/Source/JavaScriptCore/b3/B3StackmapGenerationParams.cpp
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+/*
+ * Copyright (C) 2015-2016 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 "B3StackmapGenerationParams.h"
+
+#if ENABLE(B3_JIT)
+
+#include "AirCode.h"
+#include "AirGenerationContext.h"
+#include "B3StackmapValue.h"
+
+namespace JSC { namespace B3 {
+
+using namespace Air;
+
+const RegisterSet& StackmapGenerationParams::usedRegisters() const
+{
+    return m_value->m_usedRegisters;
+}
+
+RegisterSet StackmapGenerationParams::unavailableRegisters() const
+{
+    RegisterSet result = usedRegisters();
+    
+    RegisterSet unsavedCalleeSaves = RegisterSet::vmCalleeSaveRegisters();
+    for (const RegisterAtOffset& regAtOffset : m_context.code->calleeSaveRegisters())
+        unsavedCalleeSaves.clear(regAtOffset.reg());
+
+    result.merge(unsavedCalleeSaves);
+
+    for (GPRReg gpr : m_gpScratch)
+        result.clear(gpr);
+    for (FPRReg fpr : m_fpScratch)
+        result.clear(fpr);
+    
+    return result;
+}
+
+Vector<Box<CCallHelpers::Label>> StackmapGenerationParams::successorLabels() const
+{
+    RELEASE_ASSERT(m_context.indexInBlock == m_context.currentBlock->size() - 1);
+    RELEASE_ASSERT(m_value->effects().terminal);
+    
+    Vector<Box<CCallHelpers::Label>> result(m_context.currentBlock->numSuccessors());
+    for (unsigned i = m_context.currentBlock->numSuccessors(); i--;)
+        result[i] = m_context.blockLabels[m_context.currentBlock->successorBlock(i)];
+    return result;
+}
+
+bool StackmapGenerationParams::fallsThroughToSuccessor(unsigned successorIndex) const
+{
+    RELEASE_ASSERT(m_context.indexInBlock == m_context.currentBlock->size() - 1);
+    RELEASE_ASSERT(m_value->effects().terminal);
+    
+    Air::BasicBlock* successor = m_context.currentBlock->successorBlock(successorIndex);
+    Air::BasicBlock* nextBlock = m_context.code->findNextBlock(m_context.currentBlock);
+    return successor == nextBlock;
+}
+
+Procedure& StackmapGenerationParams::proc() const
+{
+    return m_context.code->proc();
+}
+
+StackmapGenerationParams::StackmapGenerationParams(
+    StackmapValue* value, const Vector<ValueRep>& reps, Air::GenerationContext& context)
+    : m_value(value)
+    , m_reps(reps)
+    , m_context(context)
+{
+}
+
+} } // namespace JSC::B3
+
+#endif // ENABLE(B3_JIT)
+