Implement subclassing Arrays.

src/mips/code-stubs-mips.cc

Index: src/mips/code-stubs-mips.cc
diff --git a/src/mips/code-stubs-mips.cc b/src/mips/code-stubs-mips.cc
index 309fcf8abee890cba19408228bfadf33956e4117..edb80ca0544cc471f32536dba1bc3708cd6037ae 100644
--- a/src/mips/code-stubs-mips.cc
+++ b/src/mips/code-stubs-mips.cc
@@ -4822,12 +4822,11 @@ void ArrayConstructorStub::GenerateDispatchToArrayStub(
 
 void ArrayConstructorStub::Generate(MacroAssembler* masm) {
   // ----------- S t a t e -------------
-  //  -- a0 : argc (only if argument_count() == ANY)
+  //  -- a0 : argc (only if argument_count() is ANY or MORE_THAN_ONE)
   //  -- a1 : constructor
   //  -- a2 : AllocationSite or undefined
   //  -- a3 : Original constructor
-  //  -- sp[0] : return address
-  //  -- sp[4] : last argument
+  //  -- sp[0] : last argument
   // -----------------------------------
 
   if (FLAG_debug_code) {
@@ -4865,8 +4864,28 @@ void ArrayConstructorStub::Generate(MacroAssembler* masm) {
   __ bind(&no_info);
   GenerateDispatchToArrayStub(masm, DISABLE_ALLOCATION_SITES);
 
+  // Subclassing.
   __ bind(&subclassing);
-  __ TailCallRuntime(Runtime::kThrowArrayNotSubclassableError, 0, 1);
+  __ Push(a1);
+  __ Push(a3);
+
+  // Adjust argc.
+  switch (argument_count()) {
+    case ANY:
+    case MORE_THAN_ONE:
+      __ li(at, Operand(2));
+      __ addu(a0, a0, at);
+      break;
+    case NONE:
+      __ li(a0, Operand(2));
+      break;
+    case ONE:
+      __ li(a0, Operand(3));
+      break;
+  }
+
+  __ JumpToExternalReference(
+      ExternalReference(Runtime::kArrayConstructorWithSubclassing, isolate()));
 }