Compile and simulate first dart function on arm generated from ast.

runtime/vm/constants_x64.h

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #ifndef VM_CONSTANTS_X64_H_
 #define VM_CONSTANTS_X64_H_
 
 namespace dart {
 
 enum Register {
+  kFirstFreeCpuRegister = 0,
   RAX = 0,
   RCX = 1,
   RDX = 2,
   RBX = 3,
   RSP = 4,
   RBP = 5,
   RSI = 6,
   RDI = 7,
   R8  = 8,
   R9  = 9,
   R10 = 10,
   R11 = 11,
   R12 = 12,
   R13 = 13,
   R14 = 14,
   R15 = 15,
+  kLastFreeCpuRegister = 15,
   kNumberOfCpuRegisters = 16,
   kNoRegister = -1  // Signals an illegal register.
 };
 
 
 enum ByteRegister {
   AL = 0,
   CL = 1,
   DL = 2,
   BL = 3,
@@ skipping 39 matching lines @@
   REX_X      = 1 << 1,
   REX_R      = 1 << 2,
   REX_W      = 1 << 3,
   REX_PREFIX = 1 << 6
 };
 
 
 // Register aliases.
 const Register TMP = R11;  // Used as scratch register by the assembler.
 const Register CTX = R15;  // Caches current context in generated code.
-const Register SPREG = RSP;
-const Register FPREG = RBP;
+const Register PP = kNoRegister;  // No object pool pointer.
+const Register SPREG = RSP;  // Stack pointer register.
+const Register FPREG = RBP;  // Frame pointer register.
 
 // Exception object is passed in this register to the catch handlers when an
 // exception is thrown.
 const Register kExceptionObjectReg = RAX;
 
 // Stack trace object is passed in this register to the catch handlers when
 // an exception is thrown.
 const Register kStackTraceObjectReg = RDX;
 
 enum ScaleFactor {
@@ skipping 57 matching lines @@
 };
 
 
 // The largest multibyte nop we will emit.  This could go up to 15 if it
 // becomes important to us.
 const int MAX_NOP_SIZE = 8;
 
 }  // namespace dart
 
 #endif  // VM_CONSTANTS_X64_H_