mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-11-01 16:33:37 +01:00
68 lines
2.6 KiB
C++
68 lines
2.6 KiB
C++
//==-- llvm/Target/TargetSubtarget.h - Target Information --------*- C++ -*-==//
|
|
//
|
|
// 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 subtarget options of a Target machine.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef LLVM_TARGET_TARGETSUBTARGET_H
|
|
#define LLVM_TARGET_TARGETSUBTARGET_H
|
|
|
|
#include "llvm/Target/TargetMachine.h"
|
|
|
|
namespace llvm {
|
|
|
|
class SDep;
|
|
class SUnit;
|
|
class TargetRegisterClass;
|
|
template <typename T> class SmallVectorImpl;
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
///
|
|
/// TargetSubtarget - Generic base class for all target subtargets. All
|
|
/// Target-specific options that control code generation and printing should
|
|
/// be exposed through a TargetSubtarget-derived class.
|
|
///
|
|
class TargetSubtarget {
|
|
TargetSubtarget(const TargetSubtarget&); // DO NOT IMPLEMENT
|
|
void operator=(const TargetSubtarget&); // DO NOT IMPLEMENT
|
|
protected: // Can only create subclasses...
|
|
TargetSubtarget();
|
|
public:
|
|
// AntiDepBreakMode - Type of anti-dependence breaking that should
|
|
// be performed before post-RA scheduling.
|
|
typedef enum { ANTIDEP_NONE, ANTIDEP_CRITICAL, ANTIDEP_ALL } AntiDepBreakMode;
|
|
typedef SmallVectorImpl<TargetRegisterClass*> RegClassVector;
|
|
|
|
virtual ~TargetSubtarget();
|
|
|
|
/// getSpecialAddressLatency - For targets where it is beneficial to
|
|
/// backschedule instructions that compute addresses, return a value
|
|
/// indicating the number of scheduling cycles of backscheduling that
|
|
/// should be attempted.
|
|
virtual unsigned getSpecialAddressLatency() const { return 0; }
|
|
|
|
// enablePostRAScheduler - If the target can benefit from post-regalloc
|
|
// scheduling and the specified optimization level meets the requirement
|
|
// return true to enable post-register-allocation scheduling. In
|
|
// CriticalPathRCs return any register classes that should only be broken
|
|
// if on the critical path.
|
|
virtual bool enablePostRAScheduler(CodeGenOpt::Level OptLevel,
|
|
AntiDepBreakMode& Mode,
|
|
RegClassVector& CriticalPathRCs) const;
|
|
// adjustSchedDependency - Perform target specific adjustments to
|
|
// the latency of a schedule dependency.
|
|
virtual void adjustSchedDependency(SUnit *def, SUnit *use,
|
|
SDep& dep) const { }
|
|
};
|
|
|
|
} // End llvm namespace
|
|
|
|
#endif
|