Revert "VM: New calling convention for generated code."

runtime/vm/instructions_x64.h

 // Copyright (c) 2012, 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.
 // Classes that describe assembly patterns as used by inline caches.
 
 #ifndef VM_INSTRUCTIONS_X64_H_
 #define VM_INSTRUCTIONS_X64_H_
 
 #ifndef VM_INSTRUCTIONS_H_
 #error Do not include instructions_ia32.h directly; use instructions.h instead.
@@ skipping 47 matching lines @@
     }
     return true;
   }
 
   const uword start_;
 
   DISALLOW_COPY_AND_ASSIGN(InstructionPattern);
 };
 
 
+class JumpPattern : public InstructionPattern<JumpPattern> {
+ public:
+  JumpPattern(uword pc, const Code& code)
+      : InstructionPattern(pc),
+        object_pool_(ObjectPool::Handle(code.GetObjectPool())) {}
+
+  uword TargetAddress() const;
+  void SetTargetAddress(uword new_target) const;
+
+  static const int kLengthInBytes = 7;
+  static int pattern_length_in_bytes() { return kLengthInBytes; }
+  static const int* pattern() {
+    //  07: 41 ff a7 imm32  jmpq [reg + off]
+    static const int kJumpPattern[kLengthInBytes] =
+        {0x41, 0xFF, -1, -1, -1, -1, -1};
+    return kJumpPattern;
+  }
+ private:
+  const ObjectPool& object_pool_;
+
+  DISALLOW_COPY_AND_ASSIGN(JumpPattern);
+};
+
+
 // 5 byte call instruction.
 class ShortCallPattern : public InstructionPattern<ShortCallPattern> {
  public:
   explicit ShortCallPattern(uword pc) : InstructionPattern(pc) {}
 
   void SetTargetAddress(uword new_target) const;
 
   static int pattern_length_in_bytes() { return kLengthInBytes; }
   static const int* pattern() {
     static const int kCallPattern[kLengthInBytes] = {0xE8, -1, -1, -1, -1};
@@ skipping 55 matching lines @@
 
   static int pattern_length_in_bytes() { return kLengthInBytes; }
 
  private:
   static const int kLengthInBytes = 3;
 };
 
 }  // namespace dart
 
 #endif  // VM_INSTRUCTIONS_X64_H_