diff -r 000000000000 -r 6474c204b198 js/src/jit/arm/BaselineRegisters-arm.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit/arm/BaselineRegisters-arm.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,60 @@
+/* -*- 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_arm_BaselineRegisters_arm_h
+#define jit_arm_BaselineRegisters_arm_h
+
+#ifdef JS_ION
+
+#include "jit/IonMacroAssembler.h"
+
+namespace js {
+namespace jit {
+
+// r15 = program-counter
+// r14 = link-register
+
+// r13 = stack-pointer
+// r11 = frame-pointer
+static MOZ_CONSTEXPR_VAR Register BaselineFrameReg = r11;
+static MOZ_CONSTEXPR_VAR Register BaselineStackReg = sp;
+
+// ValueOperands R0, R1, and R2.
+// R0 == JSReturnReg, and R2 uses registers not
+// preserved across calls.  R1 value should be
+// preserved across calls.
+static MOZ_CONSTEXPR_VAR ValueOperand R0(r3, r2);
+static MOZ_CONSTEXPR_VAR ValueOperand R1(r5, r4);
+static MOZ_CONSTEXPR_VAR ValueOperand R2(r1, r0);
+
+// BaselineTailCallReg and BaselineStubReg
+// These use registers that are not preserved across
+// calls.
+static MOZ_CONSTEXPR_VAR Register BaselineTailCallReg = r14;
+static MOZ_CONSTEXPR_VAR Register BaselineStubReg     = r9;
+
+static MOZ_CONSTEXPR_VAR Register ExtractTemp0        = InvalidReg;
+static MOZ_CONSTEXPR_VAR Register ExtractTemp1        = InvalidReg;
+
+// Register used internally by MacroAssemblerARM.
+static MOZ_CONSTEXPR_VAR Register BaselineSecondScratchReg = r6;
+
+// R7 - R9 are generally available for use within stubcode.
+
+// Note that BaselineTailCallReg is actually just the link
+// register.  In ARM code emission, we do not clobber BaselineTailCallReg
+// since we keep the return address for calls there.
+
+// FloatReg0 must be equal to ReturnFloatReg.
+static MOZ_CONSTEXPR_VAR FloatRegister FloatReg0      = d0;
+static MOZ_CONSTEXPR_VAR FloatRegister FloatReg1      = d1;
+
+} // namespace jit
+} // namespace js
+
+#endif // JS_ION
+
+#endif /* jit_arm_BaselineRegisters_arm_h */