[Interpreter] Use FastNewSloppyArguments when possible.

src/objects.h

Index: src/objects.h
diff --git a/src/objects.h b/src/objects.h
index fece0b232d8328ec7e29133a20b6acee0cf280d5..932a96af7fba82c0d6f328279a04416ae3bdb62b 100644
--- a/src/objects.h
+++ b/src/objects.h
@@ -7270,6 +7270,8 @@ class SharedFunctionInfo: public HeapObject {
   static const int kStrictModeBit =
       kStrictModeFunction + kCompilerHintsSmiTagSize;
   static const int kNativeBit = kNative + kCompilerHintsSmiTagSize;
+  static const int kHasDuplicateParametersBit =
+      kHasDuplicateParametersBit + kCompilerHintsSmiTagSize;
 
   static const int kClassConstructorBits =
       FunctionKind::kClassConstructor
@@ -7280,6 +7282,8 @@ class SharedFunctionInfo: public HeapObject {
   // Allows to use byte-width instructions.
   static const int kStrictModeBitWithinByte = kStrictModeBit % kBitsPerByte;
   static const int kNativeBitWithinByte = kNativeBit % kBitsPerByte;
+  static const int kHasDuplicateParametersBitWithinByte =
+      kHasDuplicateParametersBit % kBitsPerByte;
 
   static const int kClassConstructorBitsWithinByte =
       FunctionKind::kClassConstructor << kCompilerHintsSmiTagSize;
@@ -7299,6 +7303,8 @@ class SharedFunctionInfo: public HeapObject {
   static const int kStrictModeByteOffset = BYTE_OFFSET(kStrictModeFunction);
   static const int kNativeByteOffset = BYTE_OFFSET(kNative);
   static const int kFunctionKindByteOffset = BYTE_OFFSET(kFunctionKind);
+  static const int kHasDuplicateParametersByteOffset =
+      BYTE_OFFSET(kHasDuplicateParameters);
 #undef BYTE_OFFSET
 
  private: