Switchable call scheduling.

runtime/vm/code_patcher_x64.cc

 // 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.
 
 #include "vm/globals.h"  // Needed here to get TARGET_ARCH_X64.
 #if defined(TARGET_ARCH_X64)
 
 #include "vm/assembler.h"
 #include "vm/code_patcher.h"
 #include "vm/cpu.h"
@@ skipping 189 matching lines @@
   SwitchableCall(uword return_address, const Code& code)
       : start_(return_address - kCallPatternSize),
         object_pool_(ObjectPool::Handle(code.GetObjectPool())) {
     ASSERT(IsValid());
   }
 
   static const int kCallPatternSize = 21;
 
   bool IsValid() const {
     static int16_t pattern[kCallPatternSize] = {
-      0x49, 0x8b, 0x9f, -1, -1, -1, -1,  // movq rbx, [PP + cache_offs]
       0x4d, 0x8b, 0xa7, -1, -1, -1, -1,  // movq r12, [PP + code_offs]
       0x49, 0x8b, 0x4c, 0x24, 0x0f,      // movq rcx, [r12 + entrypoint_off]
+      0x49, 0x8b, 0x9f, -1, -1, -1, -1,  // movq rbx, [PP + cache_offs]
       0xff, 0xd1,                        // call rcx
     };
     ASSERT(ARRAY_SIZE(pattern) == kCallPatternSize);
     return MatchesPattern(start_, pattern, kCallPatternSize);
   }
 
   intptr_t data_index() const {
-    return IndexFromPPLoad(start_ + 3);
+    return IndexFromPPLoad(start_ + 15);
   }
   intptr_t target_index() const {
-    return IndexFromPPLoad(start_ + 10);
+    return IndexFromPPLoad(start_ + 3);
   }
 
   RawObject* data() const {
     return object_pool_.ObjectAt(data_index());
   }
   RawCode* target() const {
     return reinterpret_cast<RawCode*>(object_pool_.ObjectAt(target_index()));
   }
 
   void SetData(const Object& data) const {
@@ skipping 120 matching lines @@
                                       NativeFunction* target) {
   ASSERT(code.ContainsInstructionAt(return_address));
   NativeCall call(return_address, code);
   *target = call.native_function();
   return call.target();
 }
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_X64