[turbofan] Better and more sane support for tail calls

src/compiler/js-intrinsic-lowering.cc

Index: src/compiler/js-intrinsic-lowering.cc
diff --git a/src/compiler/js-intrinsic-lowering.cc b/src/compiler/js-intrinsic-lowering.cc
index e377ba2b122a3b88ae77f6fda13a79fb890549c7..0779dd780ba3b230a52cefa9d95cbe71ab7e720d 100644
--- a/src/compiler/js-intrinsic-lowering.cc
+++ b/src/compiler/js-intrinsic-lowering.cc
@@ -114,6 +114,8 @@ Reduction JSIntrinsicLowering::Reduce(Node* node) {
       return ReduceThrowNotDateError(node);
     case Runtime::kInlineCall:
       return ReduceCall(node);
+    case Runtime::kInlineTailCall:
+      return ReduceTailCall(node);
     default:
       break;
   }
@@ -652,6 +654,16 @@ Reduction JSIntrinsicLowering::ReduceCall(Node* node) {
   NodeProperties::ChangeOp(
       node, javascript()->CallFunction(arity, STRICT, VectorSlotPair(),
                                        ConvertReceiverMode::kAny,
+                                       TailCallMode::kDisallow));
+  return Changed(node);
+}
+
+
+Reduction JSIntrinsicLowering::ReduceTailCall(Node* node) {
+  size_t const arity = CallRuntimeParametersOf(node->op()).arity();
+  NodeProperties::ChangeOp(
+      node, javascript()->CallFunction(arity, STRICT, VectorSlotPair(),
+                                       ConvertReceiverMode::kAny,
                                        TailCallMode::kAllow));
   return Changed(node);
 }