[turbofan] Add support for accessing Uint8ClampedArrays.

src/compiler/typed-optimization.h

Index: src/compiler/typed-optimization.h
diff --git a/src/compiler/typed-optimization.h b/src/compiler/typed-optimization.h
index 8a7093a77dbfc8b85b70fdbeeff6145623bc5a33..fb2db7249dd858634419b20050dd56b7f5b0d64b 100644
--- a/src/compiler/typed-optimization.h
+++ b/src/compiler/typed-optimization.h
@@ -47,6 +47,7 @@ class V8_EXPORT_PRIVATE TypedOptimization final
   Reduction ReduceCheckString(Node* node);
   Reduction ReduceLoadField(Node* node);
   Reduction ReduceNumberRoundop(Node* node);
+  Reduction ReduceNumberToUint8Clamped(Node* node);
   Reduction ReducePhi(Node* node);
   Reduction ReduceSelect(Node* node);