Recognize leaf functions: skip stack check and populating the pc slot, store the pc slot lazily in …

runtime/vm/intermediate_language_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/intermediate_language.h"
 
 #include "lib/error.h"
@@ skipping 147 matching lines @@
   if (value().IsSmi()) {
     int64_t imm = reinterpret_cast<int64_t>(value().raw());
     __ movq(result, Immediate(imm));
   } else {
     __ LoadObject(result, value());
   }
 }
 
 
 LocationSummary* AssertAssignableComp::MakeLocationSummary() const {
-  LocationSummary* summary = new LocationSummary(3, 0);
+  const intptr_t kNumInputs = 3;
+  const intptr_t kNumTemps = 0;
+  LocationSummary* summary = new LocationSummary(kNumInputs,
+                                                 kNumTemps,
+                                                 LocationSummary::kCall);
   summary->set_in(0, Location::RegisterLocation(RAX));  // Value.
   summary->set_in(1, Location::RegisterLocation(RCX));  // Instantiator.
   summary->set_in(2, Location::RegisterLocation(RDX));  // Type arguments.
   summary->set_out(Location::RegisterLocation(RAX));
   return summary;
 }
 
 
 void AssertBooleanComp::EmitNativeCode(FlowGraphCompiler* compiler) {
   Register obj = locs()->in(0).reg();
@@ skipping 798 matching lines @@
 
 
 void LoadStaticFieldComp::EmitNativeCode(FlowGraphCompiler* compiler) {
   Register result = locs()->out().reg();
   __ LoadObject(result, field());
   __ movq(result, FieldAddress(result, Field::value_offset()));
 }
 
 
 LocationSummary* InstanceOfComp::MakeLocationSummary() const {
-  LocationSummary* summary = new LocationSummary(3, 0);
+  const intptr_t kNumInputs = 3;
+  const intptr_t kNumTemps = 0;
+  LocationSummary* summary = new LocationSummary(kNumInputs,
+                                                 kNumTemps,
+                                                 LocationSummary::kCall);
   summary->set_in(0, Location::RegisterLocation(RAX));
   summary->set_in(1, Location::RegisterLocation(RCX));
   summary->set_in(2, Location::RegisterLocation(RDX));
   summary->set_out(Location::RegisterLocation(RAX));
   return summary;
 }
 
 
 void InstanceOfComp::EmitNativeCode(FlowGraphCompiler* compiler) {
   ASSERT(locs()->in(0).reg() == RAX);  // Value.
@@ skipping 973 matching lines @@
                                  instance_call()->argument_names());
   }
   __ Bind(&done);
 }
 
 }  // namespace dart
 
 #undef __
 
 #endif  // defined TARGET_ARCH_X64