[turbofan] Implement tail calls with differing stack parameter counts

src/compiler/js-operator.h

Index: src/compiler/js-operator.h
diff --git a/src/compiler/js-operator.h b/src/compiler/js-operator.h
index 26d7e6236548cd82a846e0d04e61b838a74e575c..f3f0ca6fdfbd1b0655c6fb99148506e9a0fa4a16 100644
--- a/src/compiler/js-operator.h
+++ b/src/compiler/js-operator.h
@@ -88,7 +88,7 @@ class CallFunctionParameters final {
 
   const uint32_t bit_field_;
   const VectorSlotPair feedback_;
-  bool tail_call_mode_;
+  TailCallMode tail_call_mode_;
 };
 
 size_t hash_value(CallFunctionParameters const&);
@@ -102,15 +102,17 @@ const CallFunctionParameters& CallFunctionParametersOf(const Operator* op);
 // parameter by JSCallRuntime operators.
 class CallRuntimeParameters final {
  public:
-  CallRuntimeParameters(Runtime::FunctionId id, size_t arity)
-      : id_(id), arity_(arity) {}
+  CallRuntimeParameters(Runtime::FunctionId id, size_t arity, TailCallMode mode)
+      : id_(id), arity_(arity), mode_(mode) {}
 
   Runtime::FunctionId id() const { return id_; }
   size_t arity() const { return arity_; }
+  TailCallMode mode() const { return mode_; }
 
  private:
   const Runtime::FunctionId id_;
   const size_t arity_;
+  const TailCallMode mode_;
 };
 
 bool operator==(CallRuntimeParameters const&, CallRuntimeParameters const&);
@@ -482,7 +484,8 @@ class JSOperatorBuilder final : public ZoneObject {
       size_t arity, CallFunctionFlags flags, LanguageMode language_mode,
       VectorSlotPair const& feedback = VectorSlotPair(),
       TailCallMode tail_call_mode = NO_TAIL_CALLS);
-  const Operator* CallRuntime(Runtime::FunctionId id, size_t arity);
+  const Operator* CallRuntime(Runtime::FunctionId id, size_t arity,
+                              TailCallMode mode = ALLOW_TAIL_CALLS);
 
   const Operator* CallConstruct(int arguments);