[Turbofan]: Add integer multiplication with overflow to typed lowering.

src/compiler/js-graph.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/code-stubs.h"
 #include "src/compiler/js-graph.h"
 #include "src/compiler/node-properties.h"
 #include "src/compiler/typer.h"
 
 namespace v8 {
@@ skipping 74 matching lines @@
 
 Node* JSGraph::NullConstant() {
   return CACHED(kNullConstant, HeapConstant(factory()->null_value()));
 }
 
 
 Node* JSGraph::ZeroConstant() {
   return CACHED(kZeroConstant, NumberConstant(0.0));
 }
 
+Node* JSGraph::MinusZeroConstant() {
+  return CACHED(kMinusZeroConstant,

[Benedikt Meurer, 2016/07/14 11:41:35]

Remove this one.

+                HeapConstant(factory()->minus_zero_value()));
+}
 
 Node* JSGraph::OneConstant() {
   return CACHED(kOneConstant, NumberConstant(1.0));
 }
 
 
 Node* JSGraph::NaNConstant() {
   return CACHED(kNaNConstant,
                 NumberConstant(std::numeric_limits<double>::quiet_NaN()));
 }
@@ skipping 139 matching lines @@
   for (size_t i = 0; i < arraysize(cached_nodes_); i++) {
     if (Node* node = cached_nodes_[i]) {
       if (!node->IsDead()) nodes->push_back(node);
     }
   }
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8