LLVM 20.0.0git
Classes | Namespaces | Macros | Functions | Variables
ScheduleDAGInstrs.cpp File Reference
#include "llvm/CodeGen/ScheduleDAGInstrs.h"
#include "llvm/ADT/IntEqClasses.h"
#include "llvm/ADT/MapVector.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/SparseSet.h"
#include "llvm/ADT/iterator_range.h"
#include "llvm/Analysis/AliasAnalysis.h"
#include "llvm/Analysis/ValueTracking.h"
#include "llvm/CodeGen/LiveIntervals.h"
#include "llvm/CodeGen/LivePhysRegs.h"
#include "llvm/CodeGen/MachineBasicBlock.h"
#include "llvm/CodeGen/MachineFrameInfo.h"
#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/CodeGen/MachineInstr.h"
#include "llvm/CodeGen/MachineInstrBundle.h"
#include "llvm/CodeGen/MachineMemOperand.h"
#include "llvm/CodeGen/MachineOperand.h"
#include "llvm/CodeGen/MachineRegisterInfo.h"
#include "llvm/CodeGen/PseudoSourceValue.h"
#include "llvm/CodeGen/RegisterPressure.h"
#include "llvm/CodeGen/ScheduleDAG.h"
#include "llvm/CodeGen/ScheduleDFS.h"
#include "llvm/CodeGen/SlotIndexes.h"
#include "llvm/CodeGen/TargetRegisterInfo.h"
#include "llvm/CodeGen/TargetSubtargetInfo.h"
#include "llvm/Config/llvm-config.h"
#include "llvm/IR/Constants.h"
#include "llvm/IR/Function.h"
#include "llvm/IR/Type.h"
#include "llvm/IR/Value.h"
#include "llvm/MC/LaneBitmask.h"
#include "llvm/MC/MCRegisterInfo.h"
#include "llvm/Support/Casting.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/Compiler.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/Format.h"
#include "llvm/Support/raw_ostream.h"
#include <algorithm>
#include <cassert>
#include <iterator>
#include <utility>
#include <vector>

Go to the source code of this file.

Classes

class  llvm::ScheduleDAGInstrs::Value2SUsMap
 
class  llvm::SchedDFSImpl
 Internal state used to compute SchedDFSResult. More...
 

Namespaces

namespace  llvm
 This is an optimization pass for GlobalISel generic memory operations.
 

Macros

#define DEBUG_TYPE   "machine-scheduler"
 

Functions

static unsigned getReductionSize ()
 
static void dumpSUList (const ScheduleDAGInstrs::SUList &L)
 
static bool getUnderlyingObjectsForInstr (const MachineInstr *MI, const MachineFrameInfo &MFI, UnderlyingObjectsVector &Objects, const DataLayout &DL)
 If this machine instr has memory reference information and it can be tracked to a normal reference to a known object, return the Value for that object.
 
static bool isGlobalMemoryObject (MachineInstr *MI)
 Returns true if MI is an instruction we are unable to reason about (like a call or something with unmodeled side effects).
 
static void toggleKills (const MachineRegisterInfo &MRI, LiveRegUnits &LiveRegs, MachineInstr &MI, bool addToLiveRegs)
 
static bool hasDataSucc (const SUnit *SU)
 
raw_ostreamllvm::operator<< (raw_ostream &OS, const ILPValue &Val)
 

Variables

static cl::opt< boolEnableAASchedMI ("enable-aa-sched-mi", cl::Hidden, cl::desc("Enable use of AA during MI DAG construction"))
 
static cl::opt< boolUseTBAA ("use-tbaa-in-sched-mi", cl::Hidden, cl::init(true), cl::desc("Enable use of TBAA during MI DAG construction"))
 
static cl::opt< unsignedHugeRegion ("dag-maps-huge-region", cl::Hidden, cl::init(1000), cl::desc("The limit to use while constructing the DAG " "prior to scheduling, at which point a trade-off " "is made to avoid excessive compile time."))
 
static cl::opt< unsignedReductionSize ("dag-maps-reduction-size", cl::Hidden, cl::desc("A huge scheduling region will have maps reduced by this many " "nodes at a time. Defaults to HugeRegion / 2."))
 
static cl::opt< boolSchedPrintCycles ("sched-print-cycles", cl::Hidden, cl::init(false), cl::desc("Report top/bottom cycles when dumping SUnit instances"))
 

Macro Definition Documentation

◆ DEBUG_TYPE

#define DEBUG_TYPE   "machine-scheduler"

Definition at line 62 of file ScheduleDAGInstrs.cpp.

Function Documentation

◆ dumpSUList()

static void dumpSUList ( const ScheduleDAGInstrs::SUList L)
static

Definition at line 101 of file ScheduleDAGInstrs.cpp.

References llvm::dbgs().

Referenced by llvm::ScheduleDAGInstrs::Value2SUsMap::dump().

◆ getReductionSize()

static unsigned getReductionSize ( )
static

Definition at line 93 of file ScheduleDAGInstrs.cpp.

References HugeRegion, and ReductionSize.

Referenced by llvm::ScheduleDAGInstrs::buildSchedGraph().

◆ getUnderlyingObjectsForInstr()

static bool getUnderlyingObjectsForInstr ( const MachineInstr MI,
const MachineFrameInfo MFI,
UnderlyingObjectsVector Objects,
const DataLayout DL 
)
static

If this machine instr has memory reference information and it can be tracked to a normal reference to a known object, return the Value for that object.

This function returns false the memory location is unknown or may alias anything.

Definition at line 130 of file ScheduleDAGInstrs.cpp.

References assert(), llvm::SmallVectorImpl< T >::clear(), llvm::SmallVectorImpl< T >::emplace_back(), llvm::getUnderlyingObjectsForCodeGen(), llvm::MachineFrameInfo::hasTailCall(), llvm::isIdentifiedObject(), and MI.

Referenced by llvm::ScheduleDAGInstrs::buildSchedGraph().

◆ hasDataSucc()

static bool hasDataSucc ( const SUnit SU)
static

◆ isGlobalMemoryObject()

static bool isGlobalMemoryObject ( MachineInstr MI)
inlinestatic

Returns true if MI is an instruction we are unable to reason about (like a call or something with unmodeled side effects).

Definition at line 552 of file ScheduleDAGInstrs.cpp.

References MI.

Referenced by llvm::ScheduleDAGInstrs::buildSchedGraph().

◆ toggleKills()

static void toggleKills ( const MachineRegisterInfo MRI,
LiveRegUnits LiveRegs,
MachineInstr MI,
bool  addToLiveRegs 
)
static

Variable Documentation

◆ EnableAASchedMI

cl::opt< bool > EnableAASchedMI("enable-aa-sched-mi", cl::Hidden, cl::desc("Enable use of AA during MI DAG construction")) ( "enable-aa-sched-mi"  ,
cl::Hidden  ,
cl::desc("Enable use of AA during MI DAG construction")   
)
static

◆ HugeRegion

cl::opt< unsigned > HugeRegion("dag-maps-huge-region", cl::Hidden, cl::init(1000), cl::desc("The limit to use while constructing the DAG " "prior to scheduling, at which point a trade-off " "is made to avoid excessive compile time.")) ( "dag-maps-huge-region"  ,
cl::Hidden  ,
cl::init(1000)  ,
cl::desc("The limit to use while constructing the DAG " "prior to scheduling, at which point a trade-off " "is made to avoid excessive compile time.")   
)
static

◆ ReductionSize

cl::opt< unsigned > ReductionSize("dag-maps-reduction-size", cl::Hidden, cl::desc("A huge scheduling region will have maps reduced by this many " "nodes at a time. Defaults to HugeRegion / 2.")) ( "dag-maps-reduction-size"  ,
cl::Hidden  ,
cl::desc("A huge scheduling region will have maps reduced by this many " "nodes at a time. Defaults to HugeRegion / 2.")   
)
static

Referenced by getReductionSize().

◆ SchedPrintCycles

cl::opt< bool > SchedPrintCycles("sched-print-cycles", cl::Hidden, cl::init(false), cl::desc("Report top/bottom cycles when dumping SUnit instances")) ( "sched-print-cycles"  ,
cl::Hidden  ,
cl::init(false)  ,
cl::desc("Report top/bottom cycles when dumping SUnit instances")   
)
static

◆ UseTBAA

cl::opt< bool > UseTBAA("use-tbaa-in-sched-mi", cl::Hidden, cl::init(true), cl::desc("Enable use of TBAA during MI DAG construction")) ( "use-tbaa-in-sched-mi"  ,
cl::Hidden  ,
cl::init(true ,
cl::desc("Enable use of TBAA during MI DAG construction")   
)
static