Inline recognized List factory in the flow graph optimizer.

runtime/vm/intermediate_language_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/intermediate_language.h"
 
 #include "vm/dart_entry.h"
@@ skipping 1710 matching lines @@
   compiler->GenerateInstanceOf(token_pos(),
                                deopt_id(),
                                type(),
                                negate_result(),
                                locs());
   ASSERT(locs()->out().reg() == RAX);
 }
 
 
 LocationSummary* CreateArrayInstr::MakeLocationSummary(bool opt) const {
-  const intptr_t kNumInputs = 1;
+  const intptr_t kNumInputs = 2;
   const intptr_t kNumTemps = 0;
   LocationSummary* locs =
       new LocationSummary(kNumInputs, kNumTemps, LocationSummary::kCall);
   locs->set_in(0, Location::RegisterLocation(RBX));
+  locs->set_in(1, Location::RegisterLocation(R10));
   locs->set_out(Location::RegisterLocation(RAX));
   return locs;
 }
 
 
 void CreateArrayInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
   // Allocate the array.  R10 = length, RBX = element type.
   ASSERT(locs()->in(0).reg() == RBX);
-  __ LoadImmediate(R10, Immediate(Smi::RawValue(num_elements())), PP);
+  ASSERT(locs()->in(1).reg() == R10);
   compiler->GenerateCall(token_pos(),
                          &StubCode::AllocateArrayLabel(),
                          PcDescriptors::kOther,
                          locs());
   ASSERT(locs()->out().reg() == RAX);
 }
 
 
 LocationSummary*
 AllocateObjectWithBoundsCheckInstr::MakeLocationSummary(bool opt) const {
@@ skipping 3198 matching lines @@
                          PcDescriptors::kOther,
                          locs());
   __ Drop(2);  // Discard type arguments and receiver.
 }
 
 }  // namespace dart
 
 #undef __
 
 #endif  // defined TARGET_ARCH_X64