[turbofan] Initial support for constructor call inlining.

src/compiler/opcodes.h

Index: src/compiler/opcodes.h
diff --git a/src/compiler/opcodes.h b/src/compiler/opcodes.h
index d94c60d468d4ee2646a60f98d106e81e12d1195a..b943c22aa82ef36c010a513c95704fc580edf5a1 100644
--- a/src/compiler/opcodes.h
+++ b/src/compiler/opcodes.h
@@ -372,6 +372,11 @@ class IrOpcode {
     return kIfTrue <= value && value <= kIfDefault;
   }
 
+  // Returns true if opcode can be inlined.
+  static bool IsInlineeOpcode(Value value) {
+    return value == kJSCallConstruct || value == kJSCallFunction;
+  }
+
   // Returns true if opcode for comparison operator.
   static bool IsComparisonOpcode(Value value) {
     return (kJSEqual <= value && value <= kJSGreaterThanOrEqual) ||