Reland r20974: Unify and simplify the FastCloneShallowArrayStub

src/arm/code-stubs-arm.cc

Index: src/arm/code-stubs-arm.cc
diff --git a/src/arm/code-stubs-arm.cc b/src/arm/code-stubs-arm.cc
index 910714c65a754156d21f5bdd1d3c1404e92f0644..afea875e9e9a4da5b5f290fc57ad46189466c481 100644
--- a/src/arm/code-stubs-arm.cc
+++ b/src/arm/code-stubs-arm.cc
@@ -58,6 +58,11 @@ void FastCloneShallowArrayStub::InitializeInterfaceDescriptor(
   static Register registers[] = { r3, r2, r1 };
   descriptor->register_param_count_ = 3;
   descriptor->register_params_ = registers;
+  static Representation representations[] = {
+    Representation::Tagged(),
+    Representation::Smi(),
+    Representation::Tagged() };
+  descriptor->register_param_representations_ = representations;
   descriptor->deoptimization_handler_ =
       Runtime::FunctionForId(
           Runtime::kHiddenCreateArrayLiteralStubBailout)->entry;
@@ -201,6 +206,11 @@ static void InitializeArrayConstructorDescriptor(
     descriptor->stack_parameter_count_ = r0;
     descriptor->register_param_count_ = 3;
     descriptor->register_params_ = registers_variable_args;
+    static Representation representations[] = {
+        Representation::Tagged(),
+        Representation::Tagged(),
+        Representation::Integer32() };
+    descriptor->register_param_representations_ = representations;
   }
 
   descriptor->hint_stack_parameter_count_ = constant_stack_parameter_count;
@@ -228,6 +238,10 @@ static void InitializeInternalArrayConstructorDescriptor(
     descriptor->stack_parameter_count_ = r0;
     descriptor->register_param_count_ = 2;
     descriptor->register_params_ = registers_variable_args;
+    static Representation representations[] = {
+        Representation::Tagged(),
+        Representation::Integer32() };
+    descriptor->register_param_representations_ = representations;
   }
 
   descriptor->hint_stack_parameter_count_ = constant_stack_parameter_count;