[runtime] Kill the %NumberToIntegerMapMinusZero runtime entry.

src/arm64/code-stubs-arm64.cc

 // Copyright 2013 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_ARM64
 
 #include "src/code-stubs.h"
 #include "src/api-arguments.h"
 #include "src/bootstrapper.h"
 #include "src/codegen.h"
@@ skipping 1460 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 904 matching lines @@
   // If index is a heap number, try converting it to an integer.
   __ JumpIfNotHeapNumber(index_, index_not_number_);
   call_helper.BeforeCall(masm);
   if (embed_mode == PART_OF_IC_HANDLER) {
     __ Push(LoadWithVectorDescriptor::VectorRegister(),
             LoadWithVectorDescriptor::SlotRegister(), object_, index_);
   } else {
     // Save object_ on the stack and pass index_ as argument for runtime call.
     __ 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.
   __ Mov(index_, x0);
   if (embed_mode == PART_OF_IC_HANDLER) {
     __ Pop(object_, LoadWithVectorDescriptor::SlotRegister(),
            LoadWithVectorDescriptor::VectorRegister());
   } else {
     __ Pop(object_);
   }
   // Reload the instance type.
@@ skipping 665 matching lines @@
   __ TailCallRuntime(Runtime::kSubString);
 
   __ bind(&single_char);
   // x1: result_length
   // x10: input_string
   // x12: input_type
   // x15: from (untagged)
   __ SmiTag(from);
   StringCharAtGenerator generator(input_string, from, result_length, x0,
                                   &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 x0.
   Label not_smi;
@@ skipping 2732 matching lines @@
                            kStackUnwindSpace, NULL, spill_offset,
                            return_value_operand, NULL);
 }
 
 #undef __
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_ARM64