[runtime] Kill the %NumberToIntegerMapMinusZero runtime entry.

src/x87/code-stubs-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.
 
 #if V8_TARGET_ARCH_X87
 
 #include "src/code-stubs.h"
 #include "src/api-arguments.h"
 #include "src/base/bits.h"
 #include "src/bootstrapper.h"
@@ skipping 351 matching lines @@
          result.is(LoadDescriptor::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(0);
 
   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 1437 matching lines @@
               masm->isolate()->factory()->heap_number_map(),
               index_not_number_,
               DONT_DO_SMI_CHECK);
   call_helper.BeforeCall(masm);
   if (embed_mode == PART_OF_IC_HANDLER) {
     __ push(LoadWithVectorDescriptor::VectorRegister());
     __ push(LoadDescriptor::SlotRegister());
   }
   __ push(object_);
   __ push(index_);  // Consumed by runtime conversion function.
-  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);
   if (!index_.is(eax)) {
     // Save the conversion result before the pop instructions below
     // have a chance to overwrite it.
     __ mov(index_, eax);
   }
   __ pop(object_);
   if (embed_mode == PART_OF_IC_HANDLER) {
     __ pop(LoadDescriptor::SlotRegister());
     __ pop(LoadWithVectorDescriptor::VectorRegister());
   }
@@ skipping 312 matching lines @@
   // Just jump to runtime to create the sub string.
   __ bind(&runtime);
   __ TailCallRuntime(Runtime::kSubString);
 
   __ bind(&single_char);
   // eax: string
   // ebx: instance type
   // ecx: sub string length (smi)
   // edx: from index (smi)
   StringCharAtGenerator generator(eax, edx, ecx, eax, &runtime, &runtime,
-                                  &runtime, STRING_INDEX_IS_NUMBER,
-                                  RECEIVER_IS_STRING);
+                                  &runtime, RECEIVER_IS_STRING);
   generator.GenerateFast(masm);
   __ ret(3 * kPointerSize);
   generator.SkipSlow(masm, &runtime);
 }
 
 
 void ToNumberStub::Generate(MacroAssembler* masm) {
   // The ToNumber stub takes one argument in eax.
   Label not_smi;
   __ JumpIfNotSmi(eax, &not_smi, Label::kNear);
@@ skipping 3212 matching lines @@
                            kStackUnwindSpace, nullptr, return_value_operand,
                            NULL);
 }
 
 #undef __
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_X87