[stubs] Introduce ToIntegerStub and unify the handling of %_ToInteger.

src/full-codegen/s390/full-codegen-s390.cc

 // Copyright 2015 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.
 
 #if V8_TARGET_ARCH_S390
 
 #include "src/ast/scopes.h"
 #include "src/code-factory.h"
 #include "src/code-stubs.h"
 #include "src/codegen.h"
@@ skipping 3022 matching lines @@
     __ SmiTag(index, index);
   }
 
   __ SmiUntag(value);
   __ SmiToShortArrayOffset(r1, index);
   __ StoreHalfWord(value, MemOperand(r1, string, SeqTwoByteString::kHeaderSize -
                                                      kHeapObjectTag));
   context()->Plug(string);
 }
 
-void FullCodeGenerator::EmitToInteger(CallRuntime* expr) {
-  ZoneList<Expression*>* args = expr->arguments();
-  DCHECK_EQ(1, args->length());
-
-  // Load the argument into r2 and convert it.
-  VisitForAccumulatorValue(args->at(0));
-
-  // Convert the object to an integer.
-  Label done_convert;
-  __ JumpIfSmi(r2, &done_convert);
-  __ Push(r2);
-  __ CallRuntime(Runtime::kToInteger);
-  __ bind(&done_convert);
-  context()->Plug(r2);
-}
-
 void FullCodeGenerator::EmitStringCharFromCode(CallRuntime* expr) {
   ZoneList<Expression*>* args = expr->arguments();
   DCHECK(args->length() == 1);
   VisitForAccumulatorValue(args->at(0));
 
   Label done;
   StringCharFromCodeGenerator generator(r2, r3);
   generator.GenerateFast(masm_);
   __ b(&done);
 
@@ skipping 918 matching lines @@
   DCHECK(kOSRBranchInstruction == br_instr);
 
   DCHECK(interrupt_address ==
          isolate->builtins()->OnStackReplacement()->entry());
   return ON_STACK_REPLACEMENT;
 }
 
 }  // namespace internal
 }  // namespace v8
 #endif  // V8_TARGET_ARCH_S390