//
//===----------------------------------------------------------------------===//
//
-// This file defines structures to encapsulate the machine model as decribed in
+// This file defines structures to encapsulate the machine model as described in
// the target description.
//
//===----------------------------------------------------------------------===//
-#ifndef CODEGEN_SCHEDULE_H
-#define CODEGEN_SCHEDULE_H
+#ifndef LLVM_UTILS_TABLEGEN_CODEGENSCHEDULE_H
+#define LLVM_UTILS_TABLEGEN_CODEGENSCHEDULE_H
-#include "llvm/TableGen/Record.h"
-#include "llvm/Support/ErrorHandling.h"
#include "llvm/ADT/DenseMap.h"
#include "llvm/ADT/StringMap.h"
+#include "llvm/Support/ErrorHandling.h"
+#include "llvm/TableGen/Record.h"
+#include "llvm/TableGen/SetTheory.h"
namespace llvm {
/// IsVariadic controls whether the variants are expanded into multiple operands
/// or a sequence of writes on one operand.
struct CodeGenSchedRW {
+ unsigned Index;
std::string Name;
Record *TheDef;
+ bool IsRead;
+ bool IsAlias;
bool HasVariants;
bool IsVariadic;
bool IsSequence;
IdxVec Sequence;
+ RecVec Aliases;
- CodeGenSchedRW(): TheDef(0), HasVariants(false), IsVariadic(false),
- IsSequence(false) {}
- CodeGenSchedRW(Record *Def): TheDef(Def), IsVariadic(false) {
+ CodeGenSchedRW()
+ : Index(0), TheDef(nullptr), IsRead(false), IsAlias(false),
+ HasVariants(false), IsVariadic(false), IsSequence(false) {}
+ CodeGenSchedRW(unsigned Idx, Record *Def)
+ : Index(Idx), TheDef(Def), IsAlias(false), IsVariadic(false) {
Name = Def->getName();
+ IsRead = Def->isSubClassOf("SchedRead");
HasVariants = Def->isSubClassOf("SchedVariant");
if (HasVariants)
IsVariadic = Def->getValueAsBit("Variadic");
IsSequence = Def->isSubClassOf("WriteSequence");
}
- CodeGenSchedRW(const IdxVec &Seq, const std::string &Name):
- Name(Name), TheDef(0), HasVariants(false), IsVariadic(false),
- IsSequence(true), Sequence(Seq) {
+ CodeGenSchedRW(unsigned Idx, bool Read, ArrayRef<unsigned> Seq,
+ const std::string &Name)
+ : Index(Idx), Name(Name), TheDef(nullptr), IsRead(Read), IsAlias(false),
+ HasVariants(false), IsVariadic(false), IsSequence(true), Sequence(Seq) {
assert(Sequence.size() > 1 && "implied sequence needs >1 RWs");
}
assert((!IsVariadic || HasVariants) && "Variadic write needs variants");
assert((!IsSequence || !HasVariants) && "Sequence can't have variant");
assert((!IsSequence || !Sequence.empty()) && "Sequence should be nonempty");
+ assert((!IsAlias || Aliases.empty()) && "Alias cannot have aliases");
return TheDef || !Sequence.empty();
}
#endif
};
+/// Represent a transition between SchedClasses induced by SchedVariant.
+struct CodeGenSchedTransition {
+ unsigned ToClassIdx;
+ IdxVec ProcIndices;
+ RecVec PredTerm;
+};
+
/// Scheduling class.
///
/// Each instruction description will be mapped to a scheduling class. There are
/// itinerary class. Each inherits the processor index from the ItinRW record
/// that mapped the itinerary class to the variant Writes or Reads.
struct CodeGenSchedClass {
+ unsigned Index;
std::string Name;
Record *ItinClassDef;
// Sorted list of ProcIdx, where ProcIdx==0 implies any processor.
IdxVec ProcIndices;
- // InstReadWrite records associated with this class. Any Instrs that the
- // definitions refer to that are not mapped to this class should be ignored.
+ std::vector<CodeGenSchedTransition> Transitions;
+
+ // InstRW records associated with this class. These records may refer to an
+ // Instruction no longer mapped to this class by InstrClassMap. These
+ // Instructions should be ignored by this class because they have been split
+ // off to join another inferred class.
RecVec InstRWs;
- CodeGenSchedClass(): ItinClassDef(0) {}
- CodeGenSchedClass(Record *rec): ItinClassDef(rec) {
- Name = rec->getName();
- ProcIndices.push_back(0);
+ CodeGenSchedClass(): Index(0), ItinClassDef(nullptr) {}
+
+ bool isKeyEqual(Record *IC, ArrayRef<unsigned> W, ArrayRef<unsigned> R) {
+ return ItinClassDef == IC && makeArrayRef(Writes) == W &&
+ makeArrayRef(Reads) == R;
}
+ // Is this class generated from a variants if existing classes? Instructions
+ // are never mapped directly to inferred scheduling classes.
+ bool isInferred() const { return !ItinClassDef; }
+
#ifndef NDEBUG
void dump(const CodeGenSchedModels *SchedModels) const;
#endif
// ModelName is a unique name used to name an instantiation of MCSchedModel.
//
// ModelDef is NULL for inferred Models. This happens when a processor defines
-// an itinerary but no machine model. If the processer defines neither a machine
+// an itinerary but no machine model. If the processor defines neither a machine
// model nor itinerary, then ModelDef remains pointing to NoModel. NoModel has
// the special "NoModel" field set to true.
//
// This list is empty if no ItinRW refers to this Processor.
RecVec ItinRWDefs;
+ // All read/write resources associated with this processor.
+ RecVec WriteResDefs;
+ RecVec ReadAdvanceDefs;
+
+ // Per-operand machine model resources associated with this processor.
+ RecVec ProcResourceDefs;
+ RecVec ProcResGroupDefs;
+
CodeGenProcModel(unsigned Idx, const std::string &Name, Record *MDef,
Record *IDef) :
Index(Idx), ModelName(Name), ModelDef(MDef), ItinsDef(IDef) {}
+ bool hasItineraries() const {
+ return !ItinsDef->getValueAsListOfDefs("IID").empty();
+ }
+
+ bool hasInstrSchedModel() const {
+ return !WriteResDefs.empty() || !ItinRWDefs.empty();
+ }
+
+ unsigned getProcResourceIdx(Record *PRDef) const;
+
#ifndef NDEBUG
void dump() const;
#endif
RecordKeeper &Records;
const CodeGenTarget &Target;
+ // Map dag expressions to Instruction lists.
+ SetTheory Sets;
+
// List of unique processor models.
std::vector<CodeGenProcModel> ProcModels;
// List of unique SchedClasses.
std::vector<CodeGenSchedClass> SchedClasses;
- // Map SchedClass name to itinerary index.
- // These are either explicit itinerary classes or classes implied by
- // instruction definitions with SchedReadWrite lists.
- StringMap<unsigned> SchedClassIdxMap;
-
- // SchedClass indices 1 up to and including NumItineraryClasses identify
- // itinerary classes that are explicitly used for this target's instruction
- // definitions. NoItinerary always has index 0 regardless of whether it is
- // explicitly referenced.
- //
- // Any implied SchedClass has an index greater than NumItineraryClasses.
- unsigned NumItineraryClasses;
-
// Any inferred SchedClass has an index greater than NumInstrSchedClassses.
unsigned NumInstrSchedClasses;
- // Map Instruction to SchedClass index. Only for Instructions mentioned in
- // OpReadWrites.
+ // Map each instruction to its unique SchedClass index considering the
+ // combination of it's itinerary class, SchedRW list, and InstRW records.
typedef DenseMap<Record*, unsigned> InstClassMapTy;
InstClassMapTy InstrClassMap;
public:
CodeGenSchedModels(RecordKeeper& RK, const CodeGenTarget &TGT);
+ // iterator access to the scheduling classes.
+ typedef std::vector<CodeGenSchedClass>::iterator class_iterator;
+ typedef std::vector<CodeGenSchedClass>::const_iterator const_class_iterator;
+ class_iterator classes_begin() { return SchedClasses.begin(); }
+ const_class_iterator classes_begin() const { return SchedClasses.begin(); }
+ class_iterator classes_end() { return SchedClasses.end(); }
+ const_class_iterator classes_end() const { return SchedClasses.end(); }
+ iterator_range<class_iterator> classes() {
+ return make_range(classes_begin(), classes_end());
+ }
+ iterator_range<const_class_iterator> classes() const {
+ return make_range(classes_begin(), classes_end());
+ }
+ iterator_range<class_iterator> explicit_classes() {
+ return make_range(classes_begin(), classes_begin() + NumInstrSchedClasses);
+ }
+ iterator_range<const_class_iterator> explicit_classes() const {
+ return make_range(classes_begin(), classes_begin() + NumInstrSchedClasses);
+ }
+
Record *getModelOrItinDef(Record *ProcDef) const {
Record *ModelDef = ProcDef->getValueAsDef("SchedModel");
Record *ItinsDef = ProcDef->getValueAsDef("ProcItin");
return ProcModels[I->second];
}
- const CodeGenProcModel &getProcModel(Record *ModelDef) const {
+ CodeGenProcModel &getProcModel(Record *ModelDef) {
ProcModelMapTy::const_iterator I = ProcModelMap.find(ModelDef);
assert(I != ProcModelMap.end() && "missing machine model");
return ProcModels[I->second];
}
+ const CodeGenProcModel &getProcModel(Record *ModelDef) const {
+ return const_cast<CodeGenSchedModels*>(this)->getProcModel(ModelDef);
+ }
// Iterate over the unique processor models.
typedef std::vector<CodeGenProcModel>::const_iterator ProcIter;
ProcIter procModelBegin() const { return ProcModels.begin(); }
ProcIter procModelEnd() const { return ProcModels.end(); }
+ // Return true if any processors have itineraries.
+ bool hasItineraries() const;
+
// Get a SchedWrite from its index.
const CodeGenSchedRW &getSchedWrite(unsigned Idx) const {
assert(Idx < SchedWrites.size() && "bad SchedWrite index");
const CodeGenSchedRW &getSchedRW(unsigned Idx, bool IsRead) const {
return IsRead ? getSchedRead(Idx) : getSchedWrite(Idx);
}
+ CodeGenSchedRW &getSchedRW(Record *Def) {
+ bool IsRead = Def->isSubClassOf("SchedRead");
+ unsigned Idx = getSchedRWIdx(Def, IsRead);
+ return const_cast<CodeGenSchedRW&>(
+ IsRead ? getSchedRead(Idx) : getSchedWrite(Idx));
+ }
+ const CodeGenSchedRW &getSchedRW(Record*Def) const {
+ return const_cast<CodeGenSchedModels&>(*this).getSchedRW(Def);
+ }
unsigned getSchedRWIdx(Record *Def, bool IsRead, unsigned After = 0) const;
- // Check if any instructions are assigned to an explicit itinerary class other
- // than NoItinerary.
- bool hasItineraryClasses() const { return NumItineraryClasses > 0; }
-
- // Return the number of itinerary classes in use by this target's instruction
- // descriptions, not including "NoItinerary".
- unsigned numItineraryClasses() const {
- return NumItineraryClasses;
- }
+ // Return true if the given write record is referenced by a ReadAdvance.
+ bool hasReadOfWrite(Record *WriteDef) const;
// Get a SchedClass from its index.
CodeGenSchedClass &getSchedClass(unsigned Idx) {
return SchedClasses[Idx];
}
- // Get an itinerary class's index. Value indices are '0' for NoItinerary up to
- // and including numItineraryClasses().
- unsigned getItinClassIdx(Record *ItinDef) const {
- assert(SchedClassIdxMap.count(ItinDef->getName()) && "missing ItinClass");
- unsigned Idx = SchedClassIdxMap.lookup(ItinDef->getName());
- assert(Idx <= NumItineraryClasses && "bad ItinClass index");
- return Idx;
- }
-
// Get the SchedClass index for an instruction. Instructions with no
// itinerary, no SchedReadWrites, and no InstrReadWrites references return 0
// for NoItinerary.
unsigned getSchedClassIdx(const CodeGenInstruction &Inst) const;
- unsigned getSchedClassIdx(const RecVec &RWDefs) const;
-
- unsigned getSchedClassIdxForItin(const Record *ItinDef) {
- return SchedClassIdxMap[ItinDef->getName()];
- }
-
typedef std::vector<CodeGenSchedClass>::const_iterator SchedClassIter;
SchedClassIter schedClassBegin() const { return SchedClasses.begin(); }
SchedClassIter schedClassEnd() const { return SchedClasses.end(); }
+ unsigned numInstrSchedClasses() const { return NumInstrSchedClasses; }
+
void findRWs(const RecVec &RWDefs, IdxVec &Writes, IdxVec &Reads) const;
void findRWs(const RecVec &RWDefs, IdxVec &RWs, bool IsRead) const;
+ void expandRWSequence(unsigned RWIdx, IdxVec &RWSeq, bool IsRead) const;
+ void expandRWSeqForProc(unsigned RWIdx, IdxVec &RWSeq, bool IsRead,
+ const CodeGenProcModel &ProcModel) const;
- unsigned addSchedClass(const IdxVec &OperWrites, const IdxVec &OperReads,
- const IdxVec &ProcIndices);
+ unsigned addSchedClass(Record *ItinDef, ArrayRef<unsigned> OperWrites,
+ ArrayRef<unsigned> OperReads,
+ ArrayRef<unsigned> ProcIndices);
unsigned findOrInsertRW(ArrayRef<unsigned> Seq, bool IsRead);
- unsigned findSchedClassIdx(const IdxVec &Writes, const IdxVec &Reads) const;
+ unsigned findSchedClassIdx(Record *ItinClassDef, ArrayRef<unsigned> Writes,
+ ArrayRef<unsigned> Reads) const;
+
+ Record *findProcResUnits(Record *ProcResKind,
+ const CodeGenProcModel &PM) const;
private:
void collectProcModels();
void collectSchedRW();
- std::string genRWName(const IdxVec& Seq, bool IsRead);
- unsigned findRWForSequence(const IdxVec &Seq, bool IsRead);
+ std::string genRWName(ArrayRef<unsigned> Seq, bool IsRead);
+ unsigned findRWForSequence(ArrayRef<unsigned> Seq, bool IsRead);
void collectSchedClasses();
- std::string createSchedClassName(const IdxVec &OperWrites,
- const IdxVec &OperReads);
+ std::string createSchedClassName(Record *ItinClassDef,
+ ArrayRef<unsigned> OperWrites,
+ ArrayRef<unsigned> OperReads);
std::string createSchedClassName(const RecVec &InstDefs);
void createInstRWClass(Record *InstRWDef);
void collectProcItins();
void collectProcItinRW();
+
+ void inferSchedClasses();
+
+ void inferFromRW(ArrayRef<unsigned> OperWrites, ArrayRef<unsigned> OperReads,
+ unsigned FromClassIdx, ArrayRef<unsigned> ProcIndices);
+ void inferFromItinClass(Record *ItinClassDef, unsigned FromClassIdx);
+ void inferFromInstRWs(unsigned SCIdx);
+
+ bool hasSuperGroup(RecVec &SubUnits, CodeGenProcModel &PM);
+ void verifyProcResourceGroups(CodeGenProcModel &PM);
+
+ void collectProcResources();
+
+ void collectItinProcResources(Record *ItinClassDef);
+
+ void collectRWResources(unsigned RWIdx, bool IsRead,
+ ArrayRef<unsigned> ProcIndices);
+
+ void collectRWResources(ArrayRef<unsigned> Writes, ArrayRef<unsigned> Reads,
+ ArrayRef<unsigned> ProcIndices);
+
+ void addProcResource(Record *ProcResourceKind, CodeGenProcModel &PM);
+
+ void addWriteRes(Record *ProcWriteResDef, unsigned PIdx);
+
+ void addReadAdvance(Record *ProcReadAdvanceDef, unsigned PIdx);
};
} // namespace llvm
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