Detect simple tail calls

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/node-properties.h"
 #include "src/compiler/operator-properties.h"
 
 namespace v8 {
@@ skipping 101 matching lines @@
 
 // static
 bool NodeProperties::IsControlEdge(Edge edge) {
   Node* const node = edge.from();
   return IsInputRange(edge, FirstControlIndex(node),
                       node->op()->ControlInputCount());
 }
 
 
 // static
+bool NodeProperties::IsExceptionalCall(Node* node) {
+  for (Node* const use : node->uses()) {
+    if (use->opcode() == IrOpcode::kIfException) return true;
+  }
+  return false;
+}
+
+
+// static
 void NodeProperties::ReplaceContextInput(Node* node, Node* context) {
   node->ReplaceInput(FirstContextIndex(node), context);
 }
 
 
 // static
 void NodeProperties::ReplaceControlInput(Node* node, Node* control) {
   node->ReplaceInput(FirstControlIndex(node), control);
 }
 
@@ skipping 138 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