Make start node a value input to parameter nodes.

test/cctest/compiler/test-representation-change.cc

 // Copyright 2014 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 <limits>
 
 #include "src/v8.h"
 #include "test/cctest/cctest.h"
 #include "test/cctest/compiler/graph-builder-tester.h"
 
 #include "src/compiler/node-matchers.h"
 #include "src/compiler/representation-change.h"
 #include "src/compiler/typer.h"
 
 using namespace v8::internal;
 using namespace v8::internal::compiler;
 
 namespace v8 {  // for friendiness.
 namespace internal {
 namespace compiler {
 
 class RepresentationChangerTester : public HandleAndZoneScope,
                                     public GraphAndBuilders {
  public:
-  RepresentationChangerTester()
+  explicit RepresentationChangerTester(int num_parameters = 0)
       : GraphAndBuilders(main_zone()),
         typer_(main_zone()),
         jsgraph_(main_graph_, &main_common_, &typer_),
         changer_(&jsgraph_, &main_simplified_, &main_machine_, main_isolate()) {
+    Node* s = graph()->NewNode(common()->Start(num_parameters));
+    graph()->SetStart(s);
   }
 
   Typer typer_;
   JSGraph jsgraph_;
   RepresentationChanger changer_;
 
   Isolate* isolate() { return main_isolate(); }
   Graph* graph() { return main_graph_; }
   CommonOperatorBuilder* common() { return &main_common_; }
   JSGraph* jsgraph() { return &jsgraph_; }
@@ skipping 13 matching lines @@
   }
 
   void CheckNumberConstant(Node* n, double expected) {
     ValueMatcher<double> m(n);
     CHECK_EQ(IrOpcode::kNumberConstant, n->opcode());
     CHECK(m.HasValue());
     CHECK_EQ(expected, m.Value());
   }
 
   Node* Parameter(int index = 0) {
-    return graph()->NewNode(common()->Parameter(index));
+    return graph()->NewNode(common()->Parameter(index), graph()->start());
   }
 
   void CheckTypeError(RepTypeUnion from, RepTypeUnion to) {
     changer()->testing_type_errors_ = true;
     changer()->type_error_ = false;
     Node* n = Parameter(0);
     Node* c = changer()->GetRepresentationFor(n, from, to);
     CHECK_EQ(n, c);
     CHECK(changer()->type_error_);
   }
@@ skipping 198 matching lines @@
   // rW64
   // tIrW64
   // tUrW64
   // rF64
   // tIrF64
   // tUrF64
   // tArF64
   // rT
   // tArT
 }