Switchable call scheduling.

runtime/vm/flow_graph_compiler_x64.cc

 // 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.
 
 #include "vm/globals.h"  // Needed here to get TARGET_ARCH_X64.
 #if defined(TARGET_ARCH_X64)
 
 #include "vm/flow_graph_compiler.h"
 
 #include "vm/ast_printer.h"
@@ skipping 1342 matching lines @@
     intptr_t argument_count,
     intptr_t deopt_id,
     TokenPosition token_pos,
     LocationSummary* locs) {
   ASSERT(ic_data.NumArgsTested() == 1);
   const Code& initial_stub = Code::ZoneHandle(
       StubCode::ICCallThroughFunction_entry()->code());
 
   __ Comment("SwitchableCall");
   __ movq(RDI, Address(RSP, (argument_count - 1) * kWordSize));
-  __ LoadUniqueObject(RBX, ic_data);
   __ LoadUniqueObject(CODE_REG, initial_stub);
   __ movq(RCX, FieldAddress(CODE_REG, Code::checked_entry_point_offset()));
+  __ LoadUniqueObject(RBX, ic_data);
   __ call(RCX);
 
   AddCurrentDescriptor(RawPcDescriptors::kOther,
                        Thread::kNoDeoptId, token_pos);
   RecordSafepoint(locs);
   const intptr_t deopt_id_after = Thread::ToDeoptAfter(deopt_id);
   if (is_optimizing()) {
     AddDeoptIndexAtCall(deopt_id_after);
   } else {
     // Add deoptimization continuation point after the call and before the
@@ skipping 464 matching lines @@
   __ movups(reg, Address(RSP, 0));
   __ AddImmediate(RSP, Immediate(kFpuRegisterSize));
 }
 
 
 #undef __
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_X64