[turbofan] Some more cleanup on the intrinsics.

src/compiler/js-intrinsic-lowering.h

Index: src/compiler/js-intrinsic-lowering.h
diff --git a/src/compiler/js-intrinsic-lowering.h b/src/compiler/js-intrinsic-lowering.h
index eae169eddc10fbea1886b4230769536d1439c98e..5bcc526fdc2ca903727b331574943a254e8cab76 100644
--- a/src/compiler/js-intrinsic-lowering.h
+++ b/src/compiler/js-intrinsic-lowering.h
@@ -12,6 +12,7 @@ namespace v8 {
 namespace internal {
 
 // Forward declarations.
+class Callable;
 class TypeCache;
 
 
@@ -53,10 +54,14 @@ class JSIntrinsicLowering final : public AdvancedReducer {
   Reduction ReduceMathClz32(Node* node);
   Reduction ReduceMathFloor(Node* node);
   Reduction ReduceMathSqrt(Node* node);
-  Reduction ReduceStringGetLength(Node* node);
   Reduction ReduceValueOf(Node* node);
   Reduction ReduceFixedArrayGet(Node* node);
   Reduction ReduceFixedArraySet(Node* node);
+  Reduction ReduceRegExpConstructResult(Node* node);
+  Reduction ReduceRegExpExec(Node* node);
+  Reduction ReduceRegExpFlags(Node* node);
+  Reduction ReduceRegExpSource(Node* node);
+  Reduction ReduceSubString(Node* node);
   Reduction ReduceThrowNotDateError(Node* node);
   Reduction ReduceToInteger(Node* node);
   Reduction ReduceToLength(Node* node);
@@ -74,6 +79,8 @@ class JSIntrinsicLowering final : public AdvancedReducer {
   Reduction Change(Node* node, const Operator* op, Node* a, Node* b, Node* c,
                    Node* d);
   Reduction ChangeToUndefined(Node* node, Node* effect = nullptr);
+  Reduction Change(Node* node, Callable const& callable,
+                   int stack_parameter_count);
 
   Graph* graph() const;
   JSGraph* jsgraph() const { return jsgraph_; }