Revert of [WIP][turbofan] Instruction scheduler for Turbofan.

src/compiler/arm/instruction-scheduler-arm.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.
-
-#include "src/compiler/instruction-scheduler.h"
-
-namespace v8 {
-namespace internal {
-namespace compiler {
-
-bool InstructionScheduler::SchedulerSupported() { return true; }
-
-
-int InstructionScheduler::GetTargetInstructionFlags(
-    const Instruction* instr) const {
-  switch (instr->arch_opcode()) {
-    case kArmAdd:
-    case kArmAnd:
-    case kArmBic:
-    case kArmClz:
-    case kArmCmp:
-    case kArmCmn:
-    case kArmTst:
-    case kArmTeq:
-    case kArmOrr:
-    case kArmEor:
-    case kArmSub:
-    case kArmRsb:
-    case kArmMul:
-    case kArmMla:
-    case kArmMls:
-    case kArmSmmul:
-    case kArmSmmla:
-    case kArmUmull:
-    case kArmSdiv:
-    case kArmUdiv:
-    case kArmMov:
-    case kArmMvn:
-    case kArmBfc:
-    case kArmUbfx:
-    case kArmSxtb:
-    case kArmSxth:
-    case kArmSxtab:
-    case kArmSxtah:
-    case kArmUxtb:
-    case kArmUxth:
-    case kArmUxtab:
-    case kArmUxtah:
-    case kArmVcmpF32:
-    case kArmVaddF32:
-    case kArmVsubF32:
-    case kArmVmulF32:
-    case kArmVmlaF32:
-    case kArmVmlsF32:
-    case kArmVdivF32:
-    case kArmVabsF32:
-    case kArmVnegF32:
-    case kArmVsqrtF32:
-    case kArmVcmpF64:
-    case kArmVaddF64:
-    case kArmVsubF64:
-    case kArmVmulF64:
-    case kArmVmlaF64:
-    case kArmVmlsF64:
-    case kArmVdivF64:
-    case kArmVmodF64:
-    case kArmVabsF64:
-    case kArmVnegF64:
-    case kArmVsqrtF64:
-    case kArmVrintmF32:
-    case kArmVrintmF64:
-    case kArmVrintpF32:
-    case kArmVrintpF64:
-    case kArmVrintzF32:
-    case kArmVrintzF64:
-    case kArmVrintaF64:
-    case kArmVrintnF32:
-    case kArmVrintnF64:
-    case kArmVcvtF32F64:
-    case kArmVcvtF64F32:
-    case kArmVcvtF64S32:
-    case kArmVcvtF64U32:
-    case kArmVcvtS32F64:
-    case kArmVcvtU32F64:
-    case kArmVmovLowU32F64:
-    case kArmVmovLowF64U32:
-    case kArmVmovHighU32F64:
-    case kArmVmovHighF64U32:
-    case kArmVmovF64U32U32:
-      return kNoOpcodeFlags;
-
-    case kArmVldrF32:
-    case kArmVldrF64:
-    case kArmLdrb:
-    case kArmLdrsb:
-    case kArmLdrh:
-    case kArmLdrsh:
-    case kArmLdr:
-      return kIsLoadOperation;
-
-    case kArmVstrF32:
-    case kArmVstrF64:
-    case kArmStrb:
-    case kArmStrh:
-    case kArmStr:
-    case kArmPush:
-    case kArmPoke:
-      return kHasSideEffect;
-
-#define CASE(Name) case k##Name:
-    COMMON_ARCH_OPCODE_LIST(CASE)
-#undef CASE
-      // Already covered in architecture independent code.
-      UNREACHABLE();
-  }
-}
-
-
-int InstructionScheduler::GetInstructionLatency(const Instruction* instr) {
-  // TODO(all): Add instruction cost modeling.
-  return 1;
-}
-
-}  // namespace compiler
-}  // namespace internal
-}  // namespace v8