Reland of "[turbofan] Osr value typing + dynamic type checks on entry. (patchset #5 id:80001 of htt…

src/compiler/node-properties.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/common-operator.h"
 #include "src/compiler/graph.h"
 #include "src/compiler/js-operator.h"
 #include "src/compiler/linkage.h"
 #include "src/compiler/node-properties.h"
 #include "src/compiler/operator-properties.h"
@@ skipping 350 matching lines @@
         // very last context in the context chain anyway.
         node = NodeProperties::GetContextInput(node);
         break;
       }
       case IrOpcode::kHeapConstant: {
         // Extract the native context from the actual {context}.
         Handle<Context> context =
             Handle<Context>::cast(OpParameter<Handle<HeapObject>>(node));
         return handle(context->native_context());
       }
-      case IrOpcode::kOsrValue: {
-        int const index = OpParameter<int>(node);
+      case IrOpcode::kOsrGuard: {
+        Node* osr_value = node->InputAt(0);
+        DCHECK_EQ(IrOpcode::kOsrValue, osr_value->opcode());
+        int const index = OsrValueIndexOf(osr_value->op());
         if (index == Linkage::kOsrContextSpillSlotIndex) {
           return native_context;
         }
         return MaybeHandle<Context>();
       }
       case IrOpcode::kParameter: {
         Node* const start = NodeProperties::GetValueInput(node, 0);
         DCHECK_EQ(IrOpcode::kStart, start->opcode());
         int const index = ParameterIndexOf(node->op());
         // The context is always the last parameter to a JavaScript function,
@@ skipping 41 matching lines @@
 // static
 bool NodeProperties::IsInputRange(Edge edge, int first, int num) {
   if (num == 0) return false;
   int const index = edge.index();
   return first <= index && index < first + num;
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8