Remove the optimized construct stub.

src/mips/stub-cache-mips.cc

Index: src/mips/stub-cache-mips.cc
diff --git a/src/mips/stub-cache-mips.cc b/src/mips/stub-cache-mips.cc
index a19b964327ed18c4de06e6e018ed55e1da0a5fb8..63fde9711809391bbec08a077e44074f7ab9433f 100644
--- a/src/mips/stub-cache-mips.cc
+++ b/src/mips/stub-cache-mips.cc
@@ -3143,157 +3143,6 @@ Handle<Code> KeyedStoreStubCompiler::CompileStorePolymorphic(
 }
 
 
-Handle<Code> ConstructStubCompiler::CompileConstructStub(
-    Handle<JSFunction> function) {
-  // a0    : argc
-  // a1    : constructor
-  // ra    : return address
-  // [sp]  : last argument
-  Label generic_stub_call;
-
-  // Use t7 for holding undefined which is used in several places below.
-  __ LoadRoot(t7, Heap::kUndefinedValueRootIndex);
-
-#ifdef ENABLE_DEBUGGER_SUPPORT
-  // Check to see whether there are any break points in the function code. If
-  // there are jump to the generic constructor stub which calls the actual
-  // code for the function thereby hitting the break points.
-  __ lw(t5, FieldMemOperand(a1, JSFunction::kSharedFunctionInfoOffset));
-  __ lw(a2, FieldMemOperand(t5, SharedFunctionInfo::kDebugInfoOffset));
-  __ Branch(&generic_stub_call, ne, a2, Operand(t7));
-#endif
-
-  // Load the initial map and verify that it is in fact a map.
-  // a1: constructor function
-  // t7: undefined
-  __ lw(a2, FieldMemOperand(a1, JSFunction::kPrototypeOrInitialMapOffset));
-  __ JumpIfSmi(a2, &generic_stub_call);
-  __ GetObjectType(a2, a3, t0);
-  __ Branch(&generic_stub_call, ne, t0, Operand(MAP_TYPE));
-
-#ifdef DEBUG
-  // Cannot construct functions this way.
-  // a0: argc
-  // a1: constructor function
-  // a2: initial map
-  // t7: undefined
-  __ lbu(a3, FieldMemOperand(a2, Map::kInstanceTypeOffset));
-  __ Check(ne, "Function constructed by construct stub.",
-           a3, Operand(JS_FUNCTION_TYPE));
-#endif
-
-  // Now allocate the JSObject in new space.
-  // a0: argc
-  // a1: constructor function
-  // a2: initial map
-  // t7: undefined
-  ASSERT(function->has_initial_map());
-  __ lbu(a3, FieldMemOperand(a2, Map::kInstanceSizeOffset));
-#ifdef DEBUG
-  int instance_size = function->initial_map()->instance_size();
-  __ Check(eq, "Instance size of initial map changed.",
-           a3, Operand(instance_size >> kPointerSizeLog2));
-#endif
-  __ Allocate(a3, t4, t5, t6, &generic_stub_call, SIZE_IN_WORDS);
-
-  // Allocated the JSObject, now initialize the fields. Map is set to initial
-  // map and properties and elements are set to empty fixed array.
-  // a0: argc
-  // a1: constructor function
-  // a2: initial map
-  // a3: object size (in words)
-  // t4: JSObject (not tagged)
-  // t7: undefined
-  __ LoadRoot(t6, Heap::kEmptyFixedArrayRootIndex);
-  __ mov(t5, t4);
-  __ sw(a2, MemOperand(t5, JSObject::kMapOffset));
-  __ sw(t6, MemOperand(t5, JSObject::kPropertiesOffset));
-  __ sw(t6, MemOperand(t5, JSObject::kElementsOffset));
-  __ Addu(t5, t5, Operand(3 * kPointerSize));
-  ASSERT_EQ(0 * kPointerSize, JSObject::kMapOffset);
-  ASSERT_EQ(1 * kPointerSize, JSObject::kPropertiesOffset);
-  ASSERT_EQ(2 * kPointerSize, JSObject::kElementsOffset);
-
-
-  // Calculate the location of the first argument. The stack contains only the
-  // argc arguments.
-  __ sll(a1, a0, kPointerSizeLog2);
-  __ Addu(a1, a1, sp);
-
-  // Fill all the in-object properties with undefined.
-  // a0: argc
-  // a1: first argument
-  // a3: object size (in words)
-  // t4: JSObject (not tagged)
-  // t5: First in-object property of JSObject (not tagged)
-  // t7: undefined
-  // Fill the initialized properties with a constant value or a passed argument
-  // depending on the this.x = ...; assignment in the function.
-  Handle<SharedFunctionInfo> shared(function->shared());
-  for (int i = 0; i < shared->this_property_assignments_count(); i++) {
-    if (shared->IsThisPropertyAssignmentArgument(i)) {
-      Label not_passed, next;
-      // Check if the argument assigned to the property is actually passed.
-      int arg_number = shared->GetThisPropertyAssignmentArgument(i);
-      __ Branch(&not_passed, less_equal, a0, Operand(arg_number));
-      // Argument passed - find it on the stack.
-      __ lw(a2, MemOperand(a1, (arg_number + 1) * -kPointerSize));
-      __ sw(a2, MemOperand(t5));
-      __ Addu(t5, t5, kPointerSize);
-      __ jmp(&next);
-      __ bind(&not_passed);
-      // Set the property to undefined.
-      __ sw(t7, MemOperand(t5));
-      __ Addu(t5, t5, Operand(kPointerSize));
-      __ bind(&next);
-    } else {
-      // Set the property to the constant value.
-      Handle<Object> constant(
-          shared->GetThisPropertyAssignmentConstant(i), isolate());
-      __ li(a2, Operand(constant));
-      __ sw(a2, MemOperand(t5));
-      __ Addu(t5, t5, kPointerSize);
-    }
-  }
-
-  // Fill the unused in-object property fields with undefined.
-  for (int i = shared->this_property_assignments_count();
-       i < function->initial_map()->inobject_properties();
-       i++) {
-      __ sw(t7, MemOperand(t5));
-      __ Addu(t5, t5, kPointerSize);
-  }
-
-  // a0: argc
-  // t4: JSObject (not tagged)
-  // Move argc to a1 and the JSObject to return to v0 and tag it.
-  __ mov(a1, a0);
-  __ mov(v0, t4);
-  __ Or(v0, v0, Operand(kHeapObjectTag));
-
-  // v0: JSObject
-  // a1: argc
-  // Remove caller arguments and receiver from the stack and return.
-  __ sll(t0, a1, kPointerSizeLog2);
-  __ Addu(sp, sp, t0);
-  __ Addu(sp, sp, Operand(kPointerSize));
-  Counters* counters = isolate()->counters();
-  __ IncrementCounter(counters->constructed_objects(), 1, a1, a2);
-  __ IncrementCounter(counters->constructed_objects_stub(), 1, a1, a2);
-  __ Ret();
-
-  // Jump to the generic stub in case the specialized code cannot handle the
-  // construction.
-  __ bind(&generic_stub_call);
-  Handle<Code> generic_construct_stub =
-      isolate()->builtins()->JSConstructStubGeneric();
-  __ Jump(generic_construct_stub, RelocInfo::CODE_TARGET);
-
-  // Return the generated code.
-  return GetCode();
-}
-
-
 #undef __
 #define __ ACCESS_MASM(masm)