[builtins] Migrate DatePrototype_GetField to TurboFan builtin.

src/builtins/mips/builtins-mips.cc

Index: src/builtins/mips/builtins-mips.cc
diff --git a/src/builtins/mips/builtins-mips.cc b/src/builtins/mips/builtins-mips.cc
index f86bc13f146055d7a166bcdb30904031dc9262ca..5318a852d70376c7127a00f2f3229bd378f537d5 100644
--- a/src/builtins/mips/builtins-mips.cc
+++ b/src/builtins/mips/builtins-mips.cc
@@ -1853,71 +1853,6 @@ void Builtins::Generate_InterpreterOnStackReplacement(MacroAssembler* masm) {
 }
 
 // static
-void Builtins::Generate_DatePrototype_GetField(MacroAssembler* masm,
-                                               int field_index) {
-  // ----------- S t a t e -------------
-  //  -- a0    : number of arguments
-  //  -- a1    : function
-  //  -- cp    : context
-  //  -- sp[0] : receiver
-  // -----------------------------------
-
-  // 1. Pop receiver into a0 and check that it's actually a JSDate object.
-  Label receiver_not_date;
-  {
-    __ Pop(a0);
-    __ JumpIfSmi(a0, &receiver_not_date);
-    __ GetObjectType(a0, t0, t0);
-    __ Branch(&receiver_not_date, ne, t0, Operand(JS_DATE_TYPE));
-  }
-
-  // 2. Load the specified date field, falling back to the runtime as necessary.
-  if (field_index == JSDate::kDateValue) {
-    __ Ret(USE_DELAY_SLOT);
-    __ lw(v0, FieldMemOperand(a0, JSDate::kValueOffset));  // In delay slot.
-  } else {
-    if (field_index < JSDate::kFirstUncachedField) {
-      Label stamp_mismatch;
-      __ li(a1, Operand(ExternalReference::date_cache_stamp(masm->isolate())));
-      __ lw(a1, MemOperand(a1));
-      __ lw(t0, FieldMemOperand(a0, JSDate::kCacheStampOffset));
-      __ Branch(&stamp_mismatch, ne, t0, Operand(a1));
-      __ Ret(USE_DELAY_SLOT);
-      __ lw(v0, FieldMemOperand(
-                    a0, JSDate::kValueOffset +
-                            field_index * kPointerSize));  // In delay slot.
-      __ bind(&stamp_mismatch);
-    }
-    FrameScope scope(masm, StackFrame::INTERNAL);
-    __ PrepareCallCFunction(2, t0);
-    __ li(a1, Operand(Smi::FromInt(field_index)));
-    __ CallCFunction(
-        ExternalReference::get_date_field_function(masm->isolate()), 2);
-  }
-  __ Ret();
-
-  // 3. Raise a TypeError if the receiver is not a date.
-  __ bind(&receiver_not_date);
-  {
-    FrameScope scope(masm, StackFrame::MANUAL);
-    __ Push(a0);
-    __ Move(a0, Smi::FromInt(0));
-    __ EnterBuiltinFrame(cp, a1, a0);
-    __ CallRuntime(Runtime::kThrowNotDateError);
-
-    // It's far from obvious, but this final trailing instruction after the call
-    // is required for StackFrame::LookupCode to work correctly. To illustrate
-    // why: if call were the final instruction in the code object, then the pc
-    // (== return address) would point beyond the code object when the stack is
-    // traversed. When we then try to look up the code object through
-    // StackFrame::LookupCode, we actually return the next code object that
-    // happens to be on the same page in memory.
-    // TODO(jgruber): A proper fix for this would be nice.
-    __ nop();
-  }
-}
-
-// static
 void Builtins::Generate_FunctionPrototypeApply(MacroAssembler* masm) {
   // ----------- S t a t e -------------
   //  -- a0    : argc