JavaScriptCore-7600.1.4.9.tar.gz

[apple/javascriptcore.git] / ftl / FTLExitThunkGenerator.cpp

diff --git a/ftl/FTLExitThunkGenerator.cpp b/ftl/FTLExitThunkGenerator.cpp
new file mode 100644 (file)
index 0000000..3d40bdf
--- /dev/null
+++ b/ftl/FTLExitThunkGenerator.cpp
@@ -0,0 +1,69 @@
+/*
+ * 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 "FTLExitThunkGenerator.h"
+
+#if ENABLE(FTL_JIT)
+
+#include "FTLOSRExitCompilationInfo.h"
+#include "FTLState.h"
+
+namespace JSC { namespace FTL {
+
+using namespace JSC::DFG;
+
+ExitThunkGenerator::ExitThunkGenerator(State& state)
+    : CCallHelpers(&state.graph.m_vm, state.graph.m_codeBlock)
+    , m_state(state)
+    , m_didThings(false)
+{
+}
+
+ExitThunkGenerator::~ExitThunkGenerator()
+{
+}
+
+void ExitThunkGenerator::emitThunk(unsigned index)
+{
+    OSRExitCompilationInfo& info = m_state.finalizer->osrExit[index];
+    
+    info.m_thunkLabel = label();
+    pushToSaveImmediateWithoutTouchingRegisters(TrustedImm32(index));
+    info.m_thunkJump = patchableJump();
+    
+    m_didThings = true;
+}
+
+void ExitThunkGenerator::emitThunks()
+{
+    for (unsigned i = 0; i < m_state.finalizer->osrExit.size(); ++i)
+        emitThunk(i);
+}
+
+} } // namespace JSC::FTL
+
+#endif // ENABLE(FTL_JIT)
+