[turbofan] Fix invalid access to Parameter index.

src/compiler/typer.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 "src/compiler/typer.h"
 
 #include "src/base/flags.h"
 #include "src/base/lazy-instance.h"
 #include "src/bootstrapper.h"
+#include "src/compiler/common-operator.h"
 #include "src/compiler/graph-reducer.h"
 #include "src/compiler/js-operator.h"
 #include "src/compiler/node.h"
 #include "src/compiler/node-properties.h"
 #include "src/compiler/simplified-operator.h"
 
 namespace v8 {
 namespace internal {
 namespace compiler {
 
@@ skipping 544 matching lines @@
 
 Bounds Typer::Visitor::TypeIfException(Node* node) {
   return Bounds::Unbounded(zone());
 }
 
 
 // Common operators.
 
 
 Bounds Typer::Visitor::TypeParameter(Node* node) {
-  int param = OpParameter<int>(node);
-  Type::FunctionType* function_type = typer_->function_type();
-  if (function_type != nullptr && param >= 0 &&
-      param < static_cast<int>(function_type->Arity())) {
-    return Bounds(Type::None(), function_type->Parameter(param));
+  if (Type::FunctionType* function_type = typer_->function_type()) {
+    int const index = ParameterIndexOf(node->op());
+    if (index >= 0 && index < function_type->Arity()) {
+      return Bounds(Type::None(), function_type->Parameter(index));
+    }
   }
   return Bounds::Unbounded(zone());
 }
 
 
 Bounds Typer::Visitor::TypeOsrValue(Node* node) {
   return Bounds::Unbounded(zone());
 }
 
 
@@ skipping 1781 matching lines @@
       TYPED_ARRAYS(TYPED_ARRAY_CASE)
 #undef TYPED_ARRAY_CASE
     }
   }
   return Type::Constant(value, zone());
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8