diff -r 000000000000 -r 6474c204b198 js/src/jit/shared/Lowering-x86-shared.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit/shared/Lowering-x86-shared.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,56 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
+ * vim: set ts=8 sts=4 et sw=4 tw=99:
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef jit_shared_Lowering_x86_shared_h
+#define jit_shared_Lowering_x86_shared_h
+
+#include "jit/shared/Lowering-shared.h"
+
+namespace js {
+namespace jit {
+
+class LIRGeneratorX86Shared : public LIRGeneratorShared
+{
+  protected:
+    LIRGeneratorX86Shared(MIRGenerator *gen, MIRGraph &graph, LIRGraph &lirGraph)
+      : LIRGeneratorShared(gen, graph, lirGraph)
+    {}
+
+    LTableSwitch *newLTableSwitch(const LAllocation &in, const LDefinition &inputCopy,
+                                  MTableSwitch *ins);
+    LTableSwitchV *newLTableSwitchV(MTableSwitch *ins);
+
+    bool visitGuardShape(MGuardShape *ins);
+    bool visitGuardObjectType(MGuardObjectType *ins);
+    bool visitPowHalf(MPowHalf *ins);
+    bool lowerForShift(LInstructionHelper<1, 2, 0> *ins, MDefinition *mir, MDefinition *lhs,
+                       MDefinition *rhs);
+    bool lowerForALU(LInstructionHelper<1, 1, 0> *ins, MDefinition *mir, MDefinition *input);
+    bool lowerForALU(LInstructionHelper<1, 2, 0> *ins, MDefinition *mir, MDefinition *lhs,
+                     MDefinition *rhs);
+    bool lowerForFPU(LInstructionHelper<1, 2, 0> *ins, MDefinition *mir, MDefinition *lhs,
+                     MDefinition *rhs);
+    bool lowerForBitAndAndBranch(LBitAndAndBranch *baab, MInstruction *mir,
+                                 MDefinition *lhs, MDefinition *rhs);
+    bool visitConstant(MConstant *ins);
+    bool visitAsmJSNeg(MAsmJSNeg *ins);
+    bool lowerMulI(MMul *mul, MDefinition *lhs, MDefinition *rhs);
+    bool lowerDivI(MDiv *div);
+    bool lowerModI(MMod *mod);
+    bool lowerUDiv(MDiv *div);
+    bool lowerUMod(MMod *mod);
+    bool lowerUrshD(MUrsh *mir);
+    bool lowerConstantDouble(double d, MInstruction *ins);
+    bool lowerConstantFloat32(float d, MInstruction *ins);
+    bool lowerTruncateDToInt32(MTruncateToInt32 *ins);
+    bool lowerTruncateFToInt32(MTruncateToInt32 *ins);
+    bool visitForkJoinGetSlice(MForkJoinGetSlice *ins);
+};
+
+} // namespace jit
+} // namespace js
+
+#endif /* jit_shared_Lowering_x86_shared_h */