webkitgtk-2.16.5HEADwebkitgtk-2.16.5master

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diff --git a/Source/JavaScriptCore/b3/air/AirLowerMacros.cpp b/Source/JavaScriptCore/b3/air/AirLowerMacros.cpp
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index 000000000..b086b7b08
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+++ b/Source/JavaScriptCore/b3/air/AirLowerMacros.cpp
@@ -0,0 +1,108 @@
+/*
+ * Copyright (C) 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 "AirLowerMacros.h"
+
+#if ENABLE(B3_JIT)
+
+#include "AirCCallingConvention.h"
+#include "AirCode.h"
+#include "AirInsertionSet.h"
+#include "AirInstInlines.h"
+#include "AirPhaseScope.h"
+#include "B3CCallValue.h"
+#include "B3ValueInlines.h"
+
+namespace JSC { namespace B3 { namespace Air {
+
+void lowerMacros(Code& code)
+{
+    PhaseScope phaseScope(code, "lowerMacros");
+
+    InsertionSet insertionSet(code);
+    for (BasicBlock* block : code) {
+        for (unsigned instIndex = 0; instIndex < block->size(); ++instIndex) {
+            Inst& inst = block->at(instIndex);
+
+            switch (inst.kind.opcode) {
+            case CCall: {
+                CCallValue* value = inst.origin->as<CCallValue>();
+                Kind oldKind = inst.kind;
+
+                Vector<Arg> destinations = computeCCallingConvention(code, value);
+
+                Inst shuffleArguments(Shuffle, value);
+                unsigned offset = value->type() == Void ? 0 : 1;
+                for (unsigned i = 1; i < destinations.size(); ++i) {
+                    Value* child = value->child(i);
+                    shuffleArguments.args.append(inst.args[offset + i]);
+                    shuffleArguments.args.append(destinations[i]);
+                    shuffleArguments.args.append(Arg::widthArg(Arg::widthForB3Type(child->type())));
+                }
+                insertionSet.insertInst(instIndex, WTFMove(shuffleArguments));
+
+                // Indicate that we're using our original callee argument.
+                destinations[0] = inst.args[0];
+
+                // Save where the original instruction put its result.
+                Arg resultDst = value->type() == Void ? Arg() : inst.args[1];
+                
+                inst = buildCCall(code, inst.origin, destinations);
+                if (oldKind.traps)
+                    inst.kind.traps = true;
+
+                Tmp result = cCallResult(value->type());
+                switch (value->type()) {
+                case Void:
+                    break;
+                case Float:
+                    insertionSet.insert(instIndex + 1, MoveFloat, value, result, resultDst);
+                    break;
+                case Double:
+                    insertionSet.insert(instIndex + 1, MoveDouble, value, result, resultDst);
+                    break;
+                case Int32:
+                    insertionSet.insert(instIndex + 1, Move32, value, result, resultDst);
+                    break;
+                case Int64:
+                    insertionSet.insert(instIndex + 1, Move, value, result, resultDst);
+                    break;
+                }
+                break;
+            }
+
+            default:
+                break;
+            }
+        }
+        insertionSet.execute(block);
+    }
+}
+
+} } } // namespace JSC::B3::Air
+
+#endif // ENABLE(B3_JIT)
+