webkitgtk-2.16.5HEADwebkitgtk-2.16.5master

1 files changed, 68 insertions, 0 deletions

diff --git a/Source/JavaScriptCore/jit/CallFrameShuffleData.cpp b/Source/JavaScriptCore/jit/CallFrameShuffleData.cpp
new file mode 100644
index 000000000..567202c15
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+++ b/Source/JavaScriptCore/jit/CallFrameShuffleData.cpp
@@ -0,0 +1,68 @@
+/*
+ * Copyright (C) 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 "CallFrameShuffleData.h"
+
+#if ENABLE(JIT)
+
+#include "CCallHelpers.h"
+#include "CodeBlock.h"
+
+namespace JSC {
+
+#if USE(JSVALUE64)
+
+void CallFrameShuffleData::setupCalleeSaveRegisters(CodeBlock* codeBlock)
+{
+    RegisterSet calleeSaveRegisters { RegisterSet::vmCalleeSaveRegisters() };
+    RegisterAtOffsetList* registerSaveLocations = codeBlock->calleeSaveRegisters();
+
+    for (size_t i = 0; i < registerSaveLocations->size(); ++i) {
+        RegisterAtOffset entry { registerSaveLocations->at(i) };
+        if (!calleeSaveRegisters.get(entry.reg()))
+            continue;
+
+        VirtualRegister saveSlot { entry.offsetAsIndex() };
+        registers[entry.reg()]
+            = ValueRecovery::displacedInJSStack(saveSlot, DataFormatJS);
+    }
+
+    for (Reg reg = Reg::first(); reg <= Reg::last(); reg = reg.next()) {
+        if (!calleeSaveRegisters.get(reg))
+            continue;
+
+        if (registers[reg])
+            continue;
+
+        registers[reg] = ValueRecovery::inRegister(reg, DataFormatJS);
+    }
+}
+
+#endif // USE(JSVALUE64)
+
+} // namespace JSC
+
+#endif // ENABLE(JIT)