[date] Use explicit control flow to replace %_ThrowIfNotADate.

src/x87/full-codegen-x87.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/v8.h"
 
 #if V8_TARGET_ARCH_X87
 
 #include "src/code-factory.h"
 #include "src/code-stubs.h"
@@ skipping 3778 matching lines @@
   // If the object is not a value type, return the object.
   __ CmpObjectType(eax, JS_VALUE_TYPE, ebx);
   __ j(not_equal, &done, Label::kNear);
   __ mov(eax, FieldOperand(eax, JSValue::kValueOffset));
 
   __ bind(&done);
   context()->Plug(eax);
 }
 
 
-void FullCodeGenerator::EmitThrowIfNotADate(CallRuntime* expr) {
+void FullCodeGenerator::EmitIsDate(CallRuntime* expr) {
   ZoneList<Expression*>* args = expr->arguments();
   DCHECK_EQ(1, args->length());
 
-  VisitForAccumulatorValue(args->at(0));  // Load the object.
+  VisitForAccumulatorValue(args->at(0));
 
-  Label done, not_date_object;
-  Register object = eax;
-  Register result = eax;
-  Register scratch = ecx;
+  Label materialize_true, materialize_false;
+  Label* if_true = nullptr;
+  Label* if_false = nullptr;
+  Label* fall_through = nullptr;
+  context()->PrepareTest(&materialize_true, &materialize_false, &if_true,
+                         &if_false, &fall_through);
 
-  __ JumpIfSmi(object, &not_date_object, Label::kNear);
-  __ CmpObjectType(object, JS_DATE_TYPE, scratch);
-  __ j(equal, &done, Label::kNear);
-  __ bind(&not_date_object);
-  __ CallRuntime(Runtime::kThrowNotDateError, 0);
+  __ JumpIfSmi(eax, if_false);
+  __ CmpObjectType(eax, JS_DATE_TYPE, ebx);
+  PrepareForBailoutBeforeSplit(expr, true, if_true, if_false);
+  Split(equal, if_true, if_false, fall_through);
 
-  __ bind(&done);
-  context()->Plug(result);
+  context()->Plug(if_true, if_false);
 }
 
 
 void FullCodeGenerator::EmitDateField(CallRuntime* expr) {
   ZoneList<Expression*>* args = expr->arguments();
   DCHECK(args->length() == 2);
   DCHECK_NOT_NULL(args->at(1)->AsLiteral());
   Smi* index = Smi::cast(*(args->at(1)->AsLiteral()->value()));
 
   VisitForAccumulatorValue(args->at(0));  // Load the object.
@@ skipping 1644 matching lines @@
             Assembler::target_address_at(call_target_address,
                                          unoptimized_code));
   return OSR_AFTER_STACK_CHECK;
 }
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_X87