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

src/ppc/full-codegen-ppc.cc

 // Copyright 2014 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_PPC
 
 #include "src/code-factory.h"
 #include "src/code-stubs.h"
@@ skipping 3901 matching lines @@
   // If the object is not a value type, return the object.
   __ CompareObjectType(r3, r4, r4, JS_VALUE_TYPE);
   __ bne(&done);
   __ LoadP(r3, FieldMemOperand(r3, JSValue::kValueOffset));
 
   __ bind(&done);
   context()->Plug(r3);
 }
 
 
-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 = r3;
-  Register result = r3;
-  Register scratch0 = r4;
+  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);
-  __ CompareObjectType(object, scratch0, scratch0, JS_DATE_TYPE);
-  __ beq(&done);
-  __ bind(&not_date_object);
-  __ CallRuntime(Runtime::kThrowNotDateError, 0);
+  __ JumpIfSmi(r3, if_false);
+  __ CompareObjectType(r3, r4, r4, JS_DATE_TYPE);
+  PrepareForBailoutBeforeSplit(expr, true, if_true, if_false);
+  Split(eq, 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 1609 matching lines @@
     return ON_STACK_REPLACEMENT;
   }
 
   DCHECK(interrupt_address ==
          isolate->builtins()->OsrAfterStackCheck()->entry());
   return OSR_AFTER_STACK_CHECK;
 }
 }  // namespace internal
 }  // namespace v8
 #endif  // V8_TARGET_ARCH_PPC