[runtime] Kill the %NumberToIntegerMapMinusZero runtime entry.

src/s390/code-stubs-s390.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.
 
 #if V8_TARGET_ARCH_S390
 
 #include "src/code-stubs.h"
 #include "src/api-arguments.h"
 #include "src/base/bits.h"
 #include "src/bootstrapper.h"
@@ skipping 1373 matching lines @@
   DCHECK(!scratch.is(LoadWithVectorDescriptor::VectorRegister()) &&
          result.is(LoadWithVectorDescriptor::SlotRegister()));
 
   // StringCharAtGenerator doesn't use the result register until it's passed
   // the different miss possibilities. If it did, we would have a conflict
   // when FLAG_vector_ics is true.
   StringCharAtGenerator char_at_generator(receiver, index, scratch, result,
                                           &miss,  // When not a string.
                                           &miss,  // When not a number.
                                           &miss,  // When index out of range.
-                                          STRING_INDEX_IS_ARRAY_INDEX,
                                           RECEIVER_IS_STRING);
   char_at_generator.GenerateFast(masm);
   __ Ret();
 
   StubRuntimeCallHelper call_helper;
   char_at_generator.GenerateSlow(masm, PART_OF_IC_HANDLER, call_helper);
 
   __ bind(&miss);
   PropertyAccessCompiler::TailCallBuiltin(
       masm, PropertyAccessCompiler::MissBuiltin(Code::KEYED_LOAD_IC));
@@ skipping 811 matching lines @@
   __ CheckMap(index_, result_, Heap::kHeapNumberMapRootIndex, index_not_number_,
               DONT_DO_SMI_CHECK);
   call_helper.BeforeCall(masm);
   if (embed_mode == PART_OF_IC_HANDLER) {
     __ Push(LoadWithVectorDescriptor::VectorRegister(),
             LoadWithVectorDescriptor::SlotRegister(), object_, index_);
   } else {
     // index_ is consumed by runtime conversion function.
     __ Push(object_, index_);
   }
-  if (index_flags_ == STRING_INDEX_IS_NUMBER) {
-    __ CallRuntime(Runtime::kNumberToIntegerMapMinusZero);
-  } else {
-    DCHECK(index_flags_ == STRING_INDEX_IS_ARRAY_INDEX);
-    // NumberToSmi discards numbers that are not exact integers.
-    __ CallRuntime(Runtime::kNumberToSmi);
-  }
+  __ CallRuntime(Runtime::kNumberToSmi);
   // Save the conversion result before the pop instructions below
   // have a chance to overwrite it.
   __ Move(index_, r2);
   if (embed_mode == PART_OF_IC_HANDLER) {
     __ Pop(LoadWithVectorDescriptor::VectorRegister(),
            LoadWithVectorDescriptor::SlotRegister(), object_);
   } else {
     __ pop(object_);
   }
   // Reload the instance type.
@@ skipping 310 matching lines @@
   __ bind(&runtime);
   __ TailCallRuntime(Runtime::kSubString);
 
   __ bind(&single_char);
   // r2: original string
   // r3: instance type
   // r4: length
   // r5: from index (untagged)
   __ SmiTag(r5, r5);
   StringCharAtGenerator generator(r2, r5, r4, r2, &runtime, &runtime, &runtime,
-                                  STRING_INDEX_IS_NUMBER, RECEIVER_IS_STRING);
+                                  RECEIVER_IS_STRING);
   generator.GenerateFast(masm);
   __ Drop(3);
   __ Ret();
   generator.SkipSlow(masm, &runtime);
 }
 
 void ToNumberStub::Generate(MacroAssembler* masm) {
   // The ToNumber stub takes one argument in r2.
   STATIC_ASSERT(kSmiTag == 0);
   __ TestIfSmi(r2);
@@ skipping 3033 matching lines @@
   CallApiFunctionAndReturn(masm, api_function_address, thunk_ref,
                            kStackUnwindSpace, NULL, return_value_operand, NULL);
 }
 
 #undef __
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_S390