TargetSubtargetInfo.h revision 87d21b92fc42f6b3bd8567a83fc5b5191c1205e5
1fb5792f416089d8d8d0c6ee62c1f41a55d2cf75dNate Begeman//==-- llvm/Target/TargetSubtarget.h - Target Information --------*- C++ -*-==// 2fb5792f416089d8d8d0c6ee62c1f41a55d2cf75dNate Begeman// 3fb5792f416089d8d8d0c6ee62c1f41a55d2cf75dNate Begeman// The LLVM Compiler Infrastructure 4fb5792f416089d8d8d0c6ee62c1f41a55d2cf75dNate Begeman// 57ed47a13356daed2a34cd2209a31f92552e3bdd8Chris Lattner// This file is distributed under the University of Illinois Open Source 67ed47a13356daed2a34cd2209a31f92552e3bdd8Chris Lattner// License. See LICENSE.TXT for details. 7fb5792f416089d8d8d0c6ee62c1f41a55d2cf75dNate Begeman// 8fb5792f416089d8d8d0c6ee62c1f41a55d2cf75dNate Begeman//===----------------------------------------------------------------------===// 9fb5792f416089d8d8d0c6ee62c1f41a55d2cf75dNate Begeman// 10fb5792f416089d8d8d0c6ee62c1f41a55d2cf75dNate Begeman// This file describes the subtarget options of a Target machine. 11fb5792f416089d8d8d0c6ee62c1f41a55d2cf75dNate Begeman// 12fb5792f416089d8d8d0c6ee62c1f41a55d2cf75dNate Begeman//===----------------------------------------------------------------------===// 13fb5792f416089d8d8d0c6ee62c1f41a55d2cf75dNate Begeman 14fb5792f416089d8d8d0c6ee62c1f41a55d2cf75dNate Begeman#ifndef LLVM_TARGET_TARGETSUBTARGET_H 15fb5792f416089d8d8d0c6ee62c1f41a55d2cf75dNate Begeman#define LLVM_TARGET_TARGETSUBTARGET_H 16fb5792f416089d8d8d0c6ee62c1f41a55d2cf75dNate Begeman 17fa16354e0370fe884830286923352268b036737dEvan Cheng#include "llvm/Target/TargetMachine.h" 18fa16354e0370fe884830286923352268b036737dEvan Cheng 19fb5792f416089d8d8d0c6ee62c1f41a55d2cf75dNate Begemannamespace llvm { 20fb5792f416089d8d8d0c6ee62c1f41a55d2cf75dNate Begeman 21710461688bba935f0ad5c75da7fec2ad0f225c00David Goodwinclass SDep; 22dc4bdcdef1c8dd1a28b82deb08df039e5c0ffc5aDavid Goodwinclass SUnit; 23c2e8a7e8d2ab156afaa8ab0d0317dd9ee3db7d30David Goodwinclass TargetRegisterClass; 24c2e8a7e8d2ab156afaa8ab0d0317dd9ee3db7d30David Goodwintemplate <typename T> class SmallVectorImpl; 25710461688bba935f0ad5c75da7fec2ad0f225c00David Goodwin 26fb5792f416089d8d8d0c6ee62c1f41a55d2cf75dNate Begeman//===----------------------------------------------------------------------===// 27fb5792f416089d8d8d0c6ee62c1f41a55d2cf75dNate Begeman/// 28fb5792f416089d8d8d0c6ee62c1f41a55d2cf75dNate Begeman/// TargetSubtarget - Generic base class for all target subtargets. All 29fb5792f416089d8d8d0c6ee62c1f41a55d2cf75dNate Begeman/// Target-specific options that control code generation and printing should 30fb5792f416089d8d8d0c6ee62c1f41a55d2cf75dNate Begeman/// be exposed through a TargetSubtarget-derived class. 31fb5792f416089d8d8d0c6ee62c1f41a55d2cf75dNate Begeman/// 32fb5792f416089d8d8d0c6ee62c1f41a55d2cf75dNate Begemanclass TargetSubtarget { 33fb5792f416089d8d8d0c6ee62c1f41a55d2cf75dNate Begeman TargetSubtarget(const TargetSubtarget&); // DO NOT IMPLEMENT 34fb5792f416089d8d8d0c6ee62c1f41a55d2cf75dNate Begeman void operator=(const TargetSubtarget&); // DO NOT IMPLEMENT 35fb5792f416089d8d8d0c6ee62c1f41a55d2cf75dNate Begemanprotected: // Can only create subclasses... 360e219eb9b8a2f6cb1128066584b06c6bd1b51238Nate Begeman TargetSubtarget(); 37fb5792f416089d8d8d0c6ee62c1f41a55d2cf75dNate Begemanpublic: 384c3715c2e5e17d7216a96ac2baf9720630f04408David Goodwin // AntiDepBreakMode - Type of anti-dependence breaking that should 394c3715c2e5e17d7216a96ac2baf9720630f04408David Goodwin // be performed before post-RA scheduling. 404c3715c2e5e17d7216a96ac2baf9720630f04408David Goodwin typedef enum { ANTIDEP_NONE, ANTIDEP_CRITICAL, ANTIDEP_ALL } AntiDepBreakMode; 4187d21b92fc42f6b3bd8567a83fc5b5191c1205e5David Goodwin typedef SmallVectorImpl<TargetRegisterClass*> RegClassVector; 424c3715c2e5e17d7216a96ac2baf9720630f04408David Goodwin 43fb5792f416089d8d8d0c6ee62c1f41a55d2cf75dNate Begeman virtual ~TargetSubtarget(); 448749b61178228ba1fb2668034d79da1b247173d7Dan Gohman 458749b61178228ba1fb2668034d79da1b247173d7Dan Gohman /// getSpecialAddressLatency - For targets where it is beneficial to 468749b61178228ba1fb2668034d79da1b247173d7Dan Gohman /// backschedule instructions that compute addresses, return a value 478749b61178228ba1fb2668034d79da1b247173d7Dan Gohman /// indicating the number of scheduling cycles of backscheduling that 488749b61178228ba1fb2668034d79da1b247173d7Dan Gohman /// should be attempted. 498749b61178228ba1fb2668034d79da1b247173d7Dan Gohman virtual unsigned getSpecialAddressLatency() const { return 0; } 50710461688bba935f0ad5c75da7fec2ad0f225c00David Goodwin 51fa16354e0370fe884830286923352268b036737dEvan Cheng // enablePostRAScheduler - If the target can benefit from post-regalloc 52fa16354e0370fe884830286923352268b036737dEvan Cheng // scheduling and the specified optimization level meets the requirement 5387d21b92fc42f6b3bd8567a83fc5b5191c1205e5David Goodwin // return true to enable post-register-allocation scheduling. In 5487d21b92fc42f6b3bd8567a83fc5b5191c1205e5David Goodwin // CriticalPathRCs return any register classes that should only be broken 5587d21b92fc42f6b3bd8567a83fc5b5191c1205e5David Goodwin // if on the critical path. 564c3715c2e5e17d7216a96ac2baf9720630f04408David Goodwin virtual bool enablePostRAScheduler(CodeGenOpt::Level OptLevel, 570855dee564f80160abf95497475306af38ab7f84David Goodwin AntiDepBreakMode& Mode, 5887d21b92fc42f6b3bd8567a83fc5b5191c1205e5David Goodwin RegClassVector& CriticalPathRCs) const; 59710461688bba935f0ad5c75da7fec2ad0f225c00David Goodwin // adjustSchedDependency - Perform target specific adjustments to 60710461688bba935f0ad5c75da7fec2ad0f225c00David Goodwin // the latency of a schedule dependency. 61dc4bdcdef1c8dd1a28b82deb08df039e5c0ffc5aDavid Goodwin virtual void adjustSchedDependency(SUnit *def, SUnit *use, 620dad89fa94536284d51f60868326294b725a0c61David Goodwin SDep& dep) const { } 63fb5792f416089d8d8d0c6ee62c1f41a55d2cf75dNate Begeman}; 64fb5792f416089d8d8d0c6ee62c1f41a55d2cf75dNate Begeman 65fb5792f416089d8d8d0c6ee62c1f41a55d2cf75dNate Begeman} // End llvm namespace 66fb5792f416089d8d8d0c6ee62c1f41a55d2cf75dNate Begeman 67fb5792f416089d8d8d0c6ee62c1f41a55d2cf75dNate Begeman#endif 68