[turbofan] Add DebugBreak machine operator and support

src/compiler/code-assembler.cc

 // Copyright 2015 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/compiler/code-assembler.h"
 
 #include <ostream>
 
 #include "src/code-factory.h"
 #include "src/compiler/graph.h"
@@ skipping 514 matching lines @@
 }
 
 void CodeAssembler::Branch(Node* condition, CodeAssembler::Label* true_label,
                            CodeAssembler::Label* false_label) {
   true_label->MergeVariables();
   false_label->MergeVariables();
   return raw_assembler_->Branch(condition, true_label->label_,
                                 false_label->label_);
 }
 
+void CodeAssembler::DebugBreak() { raw_assembler_->DebugBreak(); }

[Michael Starzinger, 2016/05/19 08:53:23]

nit: Likewise.

[danno, 2016/05/19 09:05:04]

Done.

+
 void CodeAssembler::Switch(Node* index, Label* default_label,
                            int32_t* case_values, Label** case_labels,
                            size_t case_count) {
   RawMachineLabel** labels =
       new (zone()->New(sizeof(RawMachineLabel*) * case_count))
           RawMachineLabel*[case_count];
   for (size_t i = 0; i < case_count; ++i) {
     labels[i] = case_labels[i]->label_;
     case_labels[i]->MergeVariables();
     default_label->MergeVariables();
@@ skipping 154 matching lines @@
       }
     }
   }
 
   bound_ = true;
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8