Revert of [ignition/turbo] Perform liveness analysis on the bytecodes

src/compiler/bytecode-liveness-map.cc

-// Copyright 2016 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/compiler/bytecode-liveness-map.h"
-
-namespace v8 {
-namespace internal {
-namespace compiler {
-
-Liveness::Liveness(int size, Zone* zone)
-    : in(new (zone) BitVector(size, zone)),
-      out(new (zone) BitVector(size, zone)) {}
-
-BytecodeLivenessMap::BytecodeLivenessMap(int bytecode_size, Zone* zone)
-    : liveness_map_(base::bits::RoundUpToPowerOfTwo32(bytecode_size / 4 + 1),
-                    base::KeyEqualityMatcher<int>(),
-                    ZoneAllocationPolicy(zone)) {}
-
-uint32_t OffsetHash(int offset) { return offset; }
-
-Liveness& BytecodeLivenessMap::InitializeLiveness(int offset, int size,
-                                                  Zone* zone) {
-  return liveness_map_
-      .LookupOrInsert(offset, OffsetHash(offset),
-                      [&]() { return Liveness(size, zone); },
-                      ZoneAllocationPolicy(zone))
-      ->value;
-}
-
-Liveness& BytecodeLivenessMap::GetLiveness(int offset) {
-  return liveness_map_.Lookup(offset, OffsetHash(offset))->value;
-}
-
-const Liveness& BytecodeLivenessMap::GetLiveness(int offset) const {
-  return liveness_map_.Lookup(offset, OffsetHash(offset))->value;
-}
-
-}  // namespace compiler
-}  // namespace internal
-}  // namespace v8