| //===-- TargetSubtargetInfo.cpp - General Target Information ---------------==// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // This file describes the general parts of a Subtarget. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "llvm/Support/CommandLine.h" |
| #include "llvm/Target/TargetSubtargetInfo.h" |
| #include "llvm/ADT/SmallVector.h" |
| using namespace llvm; |
| |
| //--------------------------------------------------------------------------- |
| // TargetSubtargetInfo Class |
| // |
| TargetSubtargetInfo::TargetSubtargetInfo() {} |
| |
| TargetSubtargetInfo::~TargetSubtargetInfo() {} |
| |
| // Temporary option to compare overall performance change when moving from the |
| // SD scheduler to the MachineScheduler pass pipeline. It should be removed |
| // before 3.4. The normal way to enable/disable the MachineScheduling pass |
| // itself is by using -enable-misched. For targets that already use MI sched |
| // (via MySubTarget::enableMachineScheduler()) -misched-bench=false negates the |
| // subtarget hook. |
| static cl::opt<bool> BenchMachineSched("misched-bench", cl::Hidden, |
| cl::desc("Migrate from the target's default SD scheduler to MI scheduler")); |
| |
| bool TargetSubtargetInfo::useMachineScheduler() const { |
| if (BenchMachineSched.getNumOccurrences()) |
| return BenchMachineSched; |
| return enableMachineScheduler(); |
| } |
| |
| bool TargetSubtargetInfo::enableMachineScheduler() const { |
| return false; |
| } |
| |
| bool TargetSubtargetInfo::enablePostRAScheduler( |
| CodeGenOpt::Level OptLevel, |
| AntiDepBreakMode& Mode, |
| RegClassVector& CriticalPathRCs) const { |
| Mode = ANTIDEP_NONE; |
| CriticalPathRCs.clear(); |
| return false; |
| } |
| |
| bool TargetSubtargetInfo::useAA() const { |
| return false; |
| } |