//
//===----------------------------------------------------------------------===//
//
-// 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.
//
//===----------------------------------------------------------------------===//
-#define DEBUG_TYPE "subtarget-emitter"
-
#include "CodeGenSchedule.h"
#include "CodeGenTarget.h"
-#include "llvm/TableGen/Error.h"
+#include "llvm/ADT/STLExtras.h"
#include "llvm/Support/Debug.h"
+#include "llvm/Support/Regex.h"
+#include "llvm/TableGen/Error.h"
using namespace llvm;
+#define DEBUG_TYPE "subtarget-emitter"
+
#ifndef NDEBUG
static void dumpIdxVec(const IdxVec &V) {
for (unsigned i = 0, e = V.size(); i < e; ++i) {
}
#endif
+namespace {
+// (instrs a, b, ...) Evaluate and union all arguments. Identical to AddOp.
+struct InstrsOp : public SetTheory::Operator {
+ void apply(SetTheory &ST, DagInit *Expr, SetTheory::RecSet &Elts,
+ ArrayRef<SMLoc> Loc) override {
+ ST.evaluate(Expr->arg_begin(), Expr->arg_end(), Elts, Loc);
+ }
+};
+
+// (instregex "OpcPat",...) Find all instructions matching an opcode pattern.
+//
+// TODO: Since this is a prefix match, perform a binary search over the
+// instruction names using lower_bound. Note that the predefined instrs must be
+// scanned linearly first. However, this is only safe if the regex pattern has
+// no top-level bars. The DAG already has a list of patterns, so there's no
+// reason to use top-level bars, but we need a way to verify they don't exist
+// before implementing the optimization.
+struct InstRegexOp : public SetTheory::Operator {
+ const CodeGenTarget &Target;
+ InstRegexOp(const CodeGenTarget &t): Target(t) {}
+
+ void apply(SetTheory &ST, DagInit *Expr, SetTheory::RecSet &Elts,
+ ArrayRef<SMLoc> Loc) override {
+ SmallVector<Regex, 4> RegexList;
+ for (DagInit::const_arg_iterator
+ AI = Expr->arg_begin(), AE = Expr->arg_end(); AI != AE; ++AI) {
+ StringInit *SI = dyn_cast<StringInit>(*AI);
+ if (!SI)
+ PrintFatalError(Loc, "instregex requires pattern string: "
+ + Expr->getAsString());
+ std::string pat = SI->getValue();
+ // Implement a python-style prefix match.
+ if (pat[0] != '^') {
+ pat.insert(0, "^(");
+ pat.insert(pat.end(), ')');
+ }
+ RegexList.push_back(Regex(pat));
+ }
+ for (const CodeGenInstruction *Inst : Target.instructions()) {
+ for (auto &R : RegexList) {
+ if (R.match(Inst->TheDef->getName()))
+ Elts.insert(Inst->TheDef);
+ }
+ }
+ }
+};
+} // end anonymous namespace
+
/// CodeGenModels ctor interprets machine model records and populates maps.
CodeGenSchedModels::CodeGenSchedModels(RecordKeeper &RK,
const CodeGenTarget &TGT):
- Records(RK), Target(TGT), NumItineraryClasses(0) {
+ Records(RK), Target(TGT) {
+
+ Sets.addFieldExpander("InstRW", "Instrs");
+
+ // Allow Set evaluation to recognize the dags used in InstRW records:
+ // (instrs Op1, Op1...)
+ Sets.addOperator("instrs", llvm::make_unique<InstrsOp>());
+ Sets.addOperator("instregex", llvm::make_unique<InstRegexOp>(Target));
// Instantiate a CodeGenProcModel for each SchedMachineModel with the values
// that are explicitly referenced in tablegen records. Resources associated
collectSchedClasses();
// Find instruction itineraries for each processor. Sort and populate
- // CodeGenProcMode::ItinDefList. (Cycle-to-cycle itineraries). This requires
+ // CodeGenProcModel::ItinDefList. (Cycle-to-cycle itineraries). This requires
// all itinerary classes to be discovered.
collectProcItins();
// Infer new SchedClasses from SchedVariant.
inferSchedClasses();
- DEBUG(for (unsigned i = 0; i < SchedClasses.size(); ++i)
- SchedClasses[i].dump(this));
-
// Populate each CodeGenProcModel's WriteResDefs, ReadAdvanceDefs, and
// ProcResourceDefs.
collectProcResources();
// Use idx=0 for NoModel/NoItineraries.
Record *NoModelDef = Records.getDef("NoSchedModel");
Record *NoItinsDef = Records.getDef("NoItineraries");
- ProcModels.push_back(CodeGenProcModel(0, "NoSchedModel",
- NoModelDef, NoItinsDef));
+ ProcModels.emplace_back(0, "NoSchedModel", NoModelDef, NoItinsDef);
ProcModelMap[NoModelDef] = 0;
// For each processor, find a unique machine model.
std::string Name = ModelKey->getName();
if (ModelKey->isSubClassOf("SchedMachineModel")) {
Record *ItinsDef = ModelKey->getValueAsDef("Itineraries");
- ProcModels.push_back(
- CodeGenProcModel(ProcModels.size(), Name, ModelKey, ItinsDef));
+ ProcModels.emplace_back(ProcModels.size(), Name, ModelKey, ItinsDef);
}
else {
// An itinerary is defined without a machine model. Infer a new model.
if (!ModelKey->getValueAsListOfDefs("IID").empty())
Name = Name + "Model";
- ProcModels.push_back(
- CodeGenProcModel(ProcModels.size(), Name,
- ProcDef->getValueAsDef("SchedModel"), ModelKey));
+ ProcModels.emplace_back(ProcModels.size(), Name,
+ ProcDef->getValueAsDef("SchedModel"), ModelKey);
}
DEBUG(ProcModels.back().dump());
}
// Recursively find all reachable SchedReadWrite records.
static void scanSchedRW(Record *RWDef, RecVec &RWDefs,
SmallPtrSet<Record*, 16> &RWSet) {
- if (!RWSet.insert(RWDef))
+ if (!RWSet.insert(RWDef).second)
return;
RWDefs.push_back(RWDef);
// Reads don't current have sequence records, but it can be added later.
// Find all SchedReadWrites referenced by instruction defs.
RecVec SWDefs, SRDefs;
- for (CodeGenTarget::inst_iterator I = Target.inst_begin(),
- E = Target.inst_end(); I != E; ++I) {
- Record *SchedDef = (*I)->TheDef;
- if (!SchedDef->isSubClassOf("Sched"))
+ for (const CodeGenInstruction *Inst : Target.instructions()) {
+ Record *SchedDef = Inst->TheDef;
+ if (SchedDef->isValueUnset("SchedRW"))
continue;
RecVec RWs = SchedDef->getValueAsListOfDefs("SchedRW");
for (RecIter RWI = RWs.begin(), RWE = RWs.end(); RWI != RWE; ++RWI) {
}
}
}
+ // Find all ReadWrites referenced by SchedAlias. AliasDefs needs to be sorted
+ // for the loop below that initializes Alias vectors.
+ RecVec AliasDefs = Records.getAllDerivedDefinitions("SchedAlias");
+ std::sort(AliasDefs.begin(), AliasDefs.end(), LessRecord());
+ for (RecIter AI = AliasDefs.begin(), AE = AliasDefs.end(); AI != AE; ++AI) {
+ Record *MatchDef = (*AI)->getValueAsDef("MatchRW");
+ Record *AliasDef = (*AI)->getValueAsDef("AliasRW");
+ if (MatchDef->isSubClassOf("SchedWrite")) {
+ if (!AliasDef->isSubClassOf("SchedWrite"))
+ PrintFatalError((*AI)->getLoc(), "SchedWrite Alias must be SchedWrite");
+ scanSchedRW(AliasDef, SWDefs, RWSet);
+ }
+ else {
+ assert(MatchDef->isSubClassOf("SchedRead") && "Unknown SchedReadWrite");
+ if (!AliasDef->isSubClassOf("SchedRead"))
+ PrintFatalError((*AI)->getLoc(), "SchedRead Alias must be SchedRead");
+ scanSchedRW(AliasDef, SRDefs, RWSet);
+ }
+ }
// Sort and add the SchedReadWrites directly referenced by instructions or
// itinerary resources. Index reads and writes in separate domains.
std::sort(SWDefs.begin(), SWDefs.end(), LessRecord());
for (RecIter SWI = SWDefs.begin(), SWE = SWDefs.end(); SWI != SWE; ++SWI) {
assert(!getSchedRWIdx(*SWI, /*IsRead=*/false) && "duplicate SchedWrite");
- SchedWrites.push_back(CodeGenSchedRW(*SWI));
+ SchedWrites.emplace_back(SchedWrites.size(), *SWI);
}
std::sort(SRDefs.begin(), SRDefs.end(), LessRecord());
for (RecIter SRI = SRDefs.begin(), SRE = SRDefs.end(); SRI != SRE; ++SRI) {
assert(!getSchedRWIdx(*SRI, /*IsRead-*/true) && "duplicate SchedWrite");
- SchedReads.push_back(CodeGenSchedRW(*SRI));
+ SchedReads.emplace_back(SchedReads.size(), *SRI);
}
// Initialize WriteSequence vectors.
for (std::vector<CodeGenSchedRW>::iterator WI = SchedWrites.begin(),
findRWs(WI->TheDef->getValueAsListOfDefs("Writes"), WI->Sequence,
/*IsRead=*/false);
}
+ // Initialize Aliases vectors.
+ for (RecIter AI = AliasDefs.begin(), AE = AliasDefs.end(); AI != AE; ++AI) {
+ Record *AliasDef = (*AI)->getValueAsDef("AliasRW");
+ getSchedRW(AliasDef).IsAlias = true;
+ Record *MatchDef = (*AI)->getValueAsDef("MatchRW");
+ CodeGenSchedRW &RW = getSchedRW(MatchDef);
+ if (RW.IsAlias)
+ PrintFatalError((*AI)->getLoc(), "Cannot Alias an Alias");
+ RW.Aliases.push_back(*AI);
+ }
DEBUG(
for (unsigned WIdx = 0, WEnd = SchedWrites.size(); WIdx != WEnd; ++WIdx) {
dbgs() << WIdx << ": ";
return 0;
}
+bool CodeGenSchedModels::hasReadOfWrite(Record *WriteDef) const {
+ for (unsigned i = 0, e = SchedReads.size(); i < e; ++i) {
+ Record *ReadDef = SchedReads[i].TheDef;
+ if (!ReadDef || !ReadDef->isSubClassOf("ProcReadAdvance"))
+ continue;
+
+ RecVec ValidWrites = ReadDef->getValueAsListOfDefs("ValidWrites");
+ if (std::find(ValidWrites.begin(), ValidWrites.end(), WriteDef)
+ != ValidWrites.end()) {
+ return true;
+ }
+ }
+ return false;
+}
+
namespace llvm {
void splitSchedReadWrites(const RecVec &RWDefs,
RecVec &WriteDefs, RecVec &ReadDefs) {
}
}
+// Expand a SchedWrite as a sequence following any aliases that coincide with
+// the given processor model.
+void CodeGenSchedModels::expandRWSeqForProc(
+ unsigned RWIdx, IdxVec &RWSeq, bool IsRead,
+ const CodeGenProcModel &ProcModel) const {
+
+ const CodeGenSchedRW &SchedWrite = getSchedRW(RWIdx, IsRead);
+ Record *AliasDef = nullptr;
+ for (RecIter AI = SchedWrite.Aliases.begin(), AE = SchedWrite.Aliases.end();
+ AI != AE; ++AI) {
+ const CodeGenSchedRW &AliasRW = getSchedRW((*AI)->getValueAsDef("AliasRW"));
+ if ((*AI)->getValueInit("SchedModel")->isComplete()) {
+ Record *ModelDef = (*AI)->getValueAsDef("SchedModel");
+ if (&getProcModel(ModelDef) != &ProcModel)
+ continue;
+ }
+ if (AliasDef)
+ PrintFatalError(AliasRW.TheDef->getLoc(), "Multiple aliases "
+ "defined for processor " + ProcModel.ModelName +
+ " Ensure only one SchedAlias exists per RW.");
+ AliasDef = AliasRW.TheDef;
+ }
+ if (AliasDef) {
+ expandRWSeqForProc(getSchedRWIdx(AliasDef, IsRead),
+ RWSeq, IsRead,ProcModel);
+ return;
+ }
+ if (!SchedWrite.IsSequence) {
+ RWSeq.push_back(RWIdx);
+ return;
+ }
+ int Repeat =
+ SchedWrite.TheDef ? SchedWrite.TheDef->getValueAsInt("Repeat") : 1;
+ for (int i = 0; i < Repeat; ++i) {
+ for (IdxIter I = SchedWrite.Sequence.begin(), E = SchedWrite.Sequence.end();
+ I != E; ++I) {
+ expandRWSeqForProc(*I, RWSeq, IsRead, ProcModel);
+ }
+ }
+}
+
// Find the existing SchedWrite that models this sequence of writes.
unsigned CodeGenSchedModels::findRWForSequence(const IdxVec &Seq,
bool IsRead) {
if (Idx)
return Idx;
- CodeGenSchedRW SchedRW(Seq, genRWName(Seq, IsRead));
- if (IsRead) {
+ unsigned RWIdx = IsRead ? SchedReads.size() : SchedWrites.size();
+ CodeGenSchedRW SchedRW(RWIdx, IsRead, Seq, genRWName(Seq, IsRead));
+ if (IsRead)
SchedReads.push_back(SchedRW);
- return SchedReads.size() - 1;
- }
- SchedWrites.push_back(SchedRW);
- return SchedWrites.size() - 1;
+ else
+ SchedWrites.push_back(SchedRW);
+ return RWIdx;
}
/// Visit all the instruction definitions for this target to gather and
// NoItinerary is always the first class at Idx=0
SchedClasses.resize(1);
- SchedClasses.back().Name = "NoItinerary";
+ SchedClasses.back().Index = 0;
+ SchedClasses.back().Name = "NoInstrModel";
+ SchedClasses.back().ItinClassDef = Records.getDef("NoItinerary");
SchedClasses.back().ProcIndices.push_back(0);
- SchedClassIdxMap[SchedClasses.back().Name] = 0;
-
- // Gather and sort all itinerary classes used by instruction descriptions.
- RecVec ItinClassList;
- for (CodeGenTarget::inst_iterator I = Target.inst_begin(),
- E = Target.inst_end(); I != E; ++I) {
- Record *ItinDef = (*I)->TheDef->getValueAsDef("Itinerary");
- // Map a new SchedClass with no index.
- if (!SchedClassIdxMap.count(ItinDef->getName())) {
- SchedClassIdxMap[ItinDef->getName()] = 0;
- ItinClassList.push_back(ItinDef);
- }
- }
- // Assign each itinerary class unique number, skipping NoItinerary==0
- NumItineraryClasses = ItinClassList.size();
- std::sort(ItinClassList.begin(), ItinClassList.end(), LessRecord());
- for (unsigned i = 0, N = NumItineraryClasses; i < N; i++) {
- Record *ItinDef = ItinClassList[i];
- SchedClassIdxMap[ItinDef->getName()] = SchedClasses.size();
- SchedClasses.push_back(CodeGenSchedClass(ItinDef));
- }
- // Infer classes from SchedReadWrite resources listed for each
- // instruction definition that inherits from class Sched.
- for (CodeGenTarget::inst_iterator I = Target.inst_begin(),
- E = Target.inst_end(); I != E; ++I) {
- if (!(*I)->TheDef->isSubClassOf("Sched"))
- continue;
+
+ // Create a SchedClass for each unique combination of itinerary class and
+ // SchedRW list.
+ for (const CodeGenInstruction *Inst : Target.instructions()) {
+ Record *ItinDef = Inst->TheDef->getValueAsDef("Itinerary");
IdxVec Writes, Reads;
- findRWs((*I)->TheDef->getValueAsListOfDefs("SchedRW"), Writes, Reads);
+ if (!Inst->TheDef->isValueUnset("SchedRW"))
+ findRWs(Inst->TheDef->getValueAsListOfDefs("SchedRW"), Writes, Reads);
+
// ProcIdx == 0 indicates the class applies to all processors.
IdxVec ProcIndices(1, 0);
- addSchedClass(Writes, Reads, ProcIndices);
+
+ unsigned SCIdx = addSchedClass(ItinDef, Writes, Reads, ProcIndices);
+ InstrClassMap[Inst->TheDef] = SCIdx;
}
- // Create classes for InstReadWrite defs.
+ // Create classes for InstRW defs.
RecVec InstRWDefs = Records.getAllDerivedDefinitions("InstRW");
std::sort(InstRWDefs.begin(), InstRWDefs.end(), LessRecord());
for (RecIter OI = InstRWDefs.begin(), OE = InstRWDefs.end(); OI != OE; ++OI)
DEBUG(EnableDump = true);
if (!EnableDump)
return;
- for (CodeGenTarget::inst_iterator I = Target.inst_begin(),
- E = Target.inst_end(); I != E; ++I) {
- Record *SchedDef = (*I)->TheDef;
- std::string InstName = (*I)->TheDef->getName();
- if (SchedDef->isSubClassOf("Sched")) {
+
+ for (const CodeGenInstruction *Inst : Target.instructions()) {
+ std::string InstName = Inst->TheDef->getName();
+ unsigned SCIdx = InstrClassMap.lookup(Inst->TheDef);
+ if (!SCIdx) {
+ dbgs() << "No machine model for " << Inst->TheDef->getName() << '\n';
+ continue;
+ }
+ CodeGenSchedClass &SC = getSchedClass(SCIdx);
+ if (SC.ProcIndices[0] != 0)
+ PrintFatalError(Inst->TheDef->getLoc(), "Instruction's sched class "
+ "must not be subtarget specific.");
+
+ IdxVec ProcIndices;
+ if (SC.ItinClassDef->getName() != "NoItinerary") {
+ ProcIndices.push_back(0);
+ dbgs() << "Itinerary for " << InstName << ": "
+ << SC.ItinClassDef->getName() << '\n';
+ }
+ if (!SC.Writes.empty()) {
+ ProcIndices.push_back(0);
+ dbgs() << "SchedRW machine model for " << InstName;
+ for (IdxIter WI = SC.Writes.begin(), WE = SC.Writes.end(); WI != WE; ++WI)
+ dbgs() << " " << SchedWrites[*WI].Name;
+ for (IdxIter RI = SC.Reads.begin(), RE = SC.Reads.end(); RI != RE; ++RI)
+ dbgs() << " " << SchedReads[*RI].Name;
+ dbgs() << '\n';
+ }
+ const RecVec &RWDefs = SchedClasses[SCIdx].InstRWs;
+ for (RecIter RWI = RWDefs.begin(), RWE = RWDefs.end();
+ RWI != RWE; ++RWI) {
+ const CodeGenProcModel &ProcModel =
+ getProcModel((*RWI)->getValueAsDef("SchedModel"));
+ ProcIndices.push_back(ProcModel.Index);
+ dbgs() << "InstRW on " << ProcModel.ModelName << " for " << InstName;
IdxVec Writes;
IdxVec Reads;
- findRWs((*I)->TheDef->getValueAsListOfDefs("SchedRW"), Writes, Reads);
- dbgs() << "SchedRW machine model for " << InstName;
+ findRWs((*RWI)->getValueAsListOfDefs("OperandReadWrites"),
+ Writes, Reads);
for (IdxIter WI = Writes.begin(), WE = Writes.end(); WI != WE; ++WI)
dbgs() << " " << SchedWrites[*WI].Name;
for (IdxIter RI = Reads.begin(), RE = Reads.end(); RI != RE; ++RI)
dbgs() << " " << SchedReads[*RI].Name;
dbgs() << '\n';
}
- unsigned SCIdx = InstrClassMap.lookup((*I)->TheDef);
- if (SCIdx) {
- const RecVec &RWDefs = SchedClasses[SCIdx].InstRWs;
- for (RecIter RWI = RWDefs.begin(), RWE = RWDefs.end();
- RWI != RWE; ++RWI) {
- const CodeGenProcModel &ProcModel =
- getProcModel((*RWI)->getValueAsDef("SchedModel"));
- dbgs() << "InstrRW on " << ProcModel.ModelName << " for " << InstName;
- IdxVec Writes;
- IdxVec Reads;
- findRWs((*RWI)->getValueAsListOfDefs("OperandReadWrites"),
- Writes, Reads);
- for (IdxIter WI = Writes.begin(), WE = Writes.end(); WI != WE; ++WI)
- dbgs() << " " << SchedWrites[*WI].Name;
- for (IdxIter RI = Reads.begin(), RE = Reads.end(); RI != RE; ++RI)
- dbgs() << " " << SchedReads[*RI].Name;
- dbgs() << '\n';
- }
- continue;
- }
- if (!SchedDef->isSubClassOf("Sched")
- && (SchedDef->getValueAsDef("Itinerary")->getName() == "NoItinerary")) {
- dbgs() << "No machine model for " << (*I)->TheDef->getName() << '\n';
+ for (std::vector<CodeGenProcModel>::iterator PI = ProcModels.begin(),
+ PE = ProcModels.end(); PI != PE; ++PI) {
+ if (!std::count(ProcIndices.begin(), ProcIndices.end(), PI->Index))
+ dbgs() << "No machine model for " << Inst->TheDef->getName()
+ << " on processor " << PI->ModelName << '\n';
}
}
}
-unsigned CodeGenSchedModels::getSchedClassIdx(
- const RecVec &RWDefs) const {
-
- IdxVec Writes, Reads;
- findRWs(RWDefs, Writes, Reads);
- return findSchedClassIdx(Writes, Reads);
-}
-
/// Find an SchedClass that has been inferred from a per-operand list of
/// SchedWrites and SchedReads.
-unsigned CodeGenSchedModels::findSchedClassIdx(const IdxVec &Writes,
+unsigned CodeGenSchedModels::findSchedClassIdx(Record *ItinClassDef,
+ const IdxVec &Writes,
const IdxVec &Reads) const {
for (SchedClassIter I = schedClassBegin(), E = schedClassEnd(); I != E; ++I) {
- // Classes with InstRWs may have the same Writes/Reads as a class originally
- // produced by a SchedRW definition. We need to be able to recover the
- // original class index for processors that don't match any InstRWs.
- if (I->ItinClassDef || !I->InstRWs.empty())
- continue;
-
- if (I->Writes == Writes && I->Reads == Reads) {
+ if (I->ItinClassDef == ItinClassDef
+ && I->Writes == Writes && I->Reads == Reads) {
return I - schedClassBegin();
}
}
unsigned CodeGenSchedModels::getSchedClassIdx(
const CodeGenInstruction &Inst) const {
- unsigned SCIdx = InstrClassMap.lookup(Inst.TheDef);
- if (SCIdx)
- return SCIdx;
-
- // If this opcode isn't mapped by the subtarget fallback to the instruction
- // definition's SchedRW or ItinDef values.
- if (Inst.TheDef->isSubClassOf("Sched")) {
- RecVec RWs = Inst.TheDef->getValueAsListOfDefs("SchedRW");
- return getSchedClassIdx(RWs);
- }
- Record *ItinDef = Inst.TheDef->getValueAsDef("Itinerary");
- assert(SchedClassIdxMap.count(ItinDef->getName()) && "missing ItinClass");
- unsigned Idx = SchedClassIdxMap.lookup(ItinDef->getName());
- assert(Idx <= NumItineraryClasses && "bad ItinClass index");
- return Idx;
+ return InstrClassMap.lookup(Inst.TheDef);
}
std::string CodeGenSchedModels::createSchedClassName(
- const IdxVec &OperWrites, const IdxVec &OperReads) {
+ Record *ItinClassDef, const IdxVec &OperWrites, const IdxVec &OperReads) {
std::string Name;
+ if (ItinClassDef && ItinClassDef->getName() != "NoItinerary")
+ Name = ItinClassDef->getName();
for (IdxIter WI = OperWrites.begin(), WE = OperWrites.end(); WI != WE; ++WI) {
- if (WI != OperWrites.begin())
+ if (!Name.empty())
Name += '_';
Name += SchedWrites[*WI].Name;
}
return Name;
}
-/// Add an inferred sched class from a per-operand list of SchedWrites and
-/// SchedReads. ProcIndices contains the set of IDs of processors that may
-/// utilize this class.
-unsigned CodeGenSchedModels::addSchedClass(const IdxVec &OperWrites,
+/// Add an inferred sched class from an itinerary class and per-operand list of
+/// SchedWrites and SchedReads. ProcIndices contains the set of IDs of
+/// processors that may utilize this class.
+unsigned CodeGenSchedModels::addSchedClass(Record *ItinClassDef,
+ const IdxVec &OperWrites,
const IdxVec &OperReads,
const IdxVec &ProcIndices)
{
assert(!ProcIndices.empty() && "expect at least one ProcIdx");
- unsigned Idx = findSchedClassIdx(OperWrites, OperReads);
- if (Idx) {
+ unsigned Idx = findSchedClassIdx(ItinClassDef, OperWrites, OperReads);
+ if (Idx || SchedClasses[0].isKeyEqual(ItinClassDef, OperWrites, OperReads)) {
IdxVec PI;
std::set_union(SchedClasses[Idx].ProcIndices.begin(),
SchedClasses[Idx].ProcIndices.end(),
Idx = SchedClasses.size();
SchedClasses.resize(Idx+1);
CodeGenSchedClass &SC = SchedClasses.back();
- SC.Name = createSchedClassName(OperWrites, OperReads);
+ SC.Index = Idx;
+ SC.Name = createSchedClassName(ItinClassDef, OperWrites, OperReads);
+ SC.ItinClassDef = ItinClassDef;
SC.Writes = OperWrites;
SC.Reads = OperReads;
SC.ProcIndices = ProcIndices;
// determined from ItinDef or SchedRW.
SmallVector<std::pair<unsigned, SmallVector<Record *, 8> >, 4> ClassInstrs;
// Sort Instrs into sets.
- RecVec InstDefs = InstRWDef->getValueAsListOfDefs("Instrs");
- std::sort(InstDefs.begin(), InstDefs.end(), LessRecord());
- for (RecIter I = InstDefs.begin(), E = InstDefs.end(); I != E; ++I) {
- unsigned SCIdx = 0;
+ const RecVec *InstDefs = Sets.expand(InstRWDef);
+ if (InstDefs->empty())
+ PrintFatalError(InstRWDef->getLoc(), "No matching instruction opcodes");
+
+ for (RecIter I = InstDefs->begin(), E = InstDefs->end(); I != E; ++I) {
InstClassMapTy::const_iterator Pos = InstrClassMap.find(*I);
- if (Pos != InstrClassMap.end())
- SCIdx = Pos->second;
- else {
- // This instruction has not been mapped yet. Get the original class. All
- // instructions in the same InstrRW class must be from the same original
- // class because that is the fall-back class for other processors.
- Record *ItinDef = (*I)->getValueAsDef("Itinerary");
- SCIdx = SchedClassIdxMap.lookup(ItinDef->getName());
- if (!SCIdx && (*I)->isSubClassOf("Sched"))
- SCIdx = getSchedClassIdx((*I)->getValueAsListOfDefs("SchedRW"));
- }
+ if (Pos == InstrClassMap.end())
+ PrintFatalError((*I)->getLoc(), "No sched class for instruction.");
+ unsigned SCIdx = Pos->second;
unsigned CIdx = 0, CEnd = ClassInstrs.size();
for (; CIdx != CEnd; ++CIdx) {
if (ClassInstrs[CIdx].first == SCIdx)
ArrayRef<Record*> InstDefs = ClassInstrs[CIdx].second;
// If the all instrs in the current class are accounted for, then leave
// them mapped to their old class.
- if (SchedClasses[OldSCIdx].InstRWs.size() == InstDefs.size()) {
- assert(SchedClasses[OldSCIdx].ProcIndices[0] == 0 &&
- "expected a generic SchedClass");
- continue;
+ if (OldSCIdx) {
+ const RecVec &RWDefs = SchedClasses[OldSCIdx].InstRWs;
+ if (!RWDefs.empty()) {
+ const RecVec *OrigInstDefs = Sets.expand(RWDefs[0]);
+ unsigned OrigNumInstrs = 0;
+ for (RecIter I = OrigInstDefs->begin(), E = OrigInstDefs->end();
+ I != E; ++I) {
+ if (InstrClassMap[*I] == OldSCIdx)
+ ++OrigNumInstrs;
+ }
+ if (OrigNumInstrs == InstDefs.size()) {
+ assert(SchedClasses[OldSCIdx].ProcIndices[0] == 0 &&
+ "expected a generic SchedClass");
+ DEBUG(dbgs() << "InstRW: Reuse SC " << OldSCIdx << ":"
+ << SchedClasses[OldSCIdx].Name << " on "
+ << InstRWDef->getValueAsDef("SchedModel")->getName() << "\n");
+ SchedClasses[OldSCIdx].InstRWs.push_back(InstRWDef);
+ continue;
+ }
+ }
}
unsigned SCIdx = SchedClasses.size();
SchedClasses.resize(SCIdx+1);
CodeGenSchedClass &SC = SchedClasses.back();
+ SC.Index = SCIdx;
SC.Name = createSchedClassName(InstDefs);
+ DEBUG(dbgs() << "InstRW: New SC " << SCIdx << ":" << SC.Name << " on "
+ << InstRWDef->getValueAsDef("SchedModel")->getName() << "\n");
+
// Preserve ItinDef and Writes/Reads for processors without an InstRW entry.
SC.ItinClassDef = SchedClasses[OldSCIdx].ItinClassDef;
SC.Writes = SchedClasses[OldSCIdx].Writes;
SC.ProcIndices.push_back(0);
// Map each Instr to this new class.
// Note that InstDefs may be a smaller list than InstRWDef's "Instrs".
+ Record *RWModelDef = InstRWDef->getValueAsDef("SchedModel");
+ SmallSet<unsigned, 4> RemappedClassIDs;
for (ArrayRef<Record*>::const_iterator
II = InstDefs.begin(), IE = InstDefs.end(); II != IE; ++II) {
unsigned OldSCIdx = InstrClassMap[*II];
- if (OldSCIdx) {
- SC.InstRWs.insert(SC.InstRWs.end(),
- SchedClasses[OldSCIdx].InstRWs.begin(),
- SchedClasses[OldSCIdx].InstRWs.end());
+ if (OldSCIdx && RemappedClassIDs.insert(OldSCIdx).second) {
+ for (RecIter RI = SchedClasses[OldSCIdx].InstRWs.begin(),
+ RE = SchedClasses[OldSCIdx].InstRWs.end(); RI != RE; ++RI) {
+ if ((*RI)->getValueAsDef("SchedModel") == RWModelDef) {
+ PrintFatalError(InstRWDef->getLoc(), "Overlapping InstRW def " +
+ (*II)->getName() + " also matches " +
+ (*RI)->getValue("Instrs")->getValue()->getAsString());
+ }
+ assert(*RI != InstRWDef && "SchedClass has duplicate InstRW def");
+ SC.InstRWs.push_back(*RI);
+ }
}
InstrClassMap[*II] = SCIdx;
}
}
}
+// True if collectProcItins found anything.
+bool CodeGenSchedModels::hasItineraries() const {
+ for (CodeGenSchedModels::ProcIter PI = procModelBegin(), PE = procModelEnd();
+ PI != PE; ++PI) {
+ if (PI->hasItineraries())
+ return true;
+ }
+ return false;
+}
+
// Gather the processor itineraries.
void CodeGenSchedModels::collectProcItins() {
- for (std::vector<CodeGenProcModel>::iterator PI = ProcModels.begin(),
- PE = ProcModels.end(); PI != PE; ++PI) {
- CodeGenProcModel &ProcModel = *PI;
- RecVec ItinRecords = ProcModel.ItinsDef->getValueAsListOfDefs("IID");
- // Skip empty itinerary.
- if (ItinRecords.empty())
+ for (CodeGenProcModel &ProcModel : ProcModels) {
+ if (!ProcModel.hasItineraries())
continue;
- ProcModel.ItinDefList.resize(NumItineraryClasses+1);
+ RecVec ItinRecords = ProcModel.ItinsDef->getValueAsListOfDefs("IID");
+ assert(!ItinRecords.empty() && "ProcModel.hasItineraries is incorrect");
+
+ // Populate ItinDefList with Itinerary records.
+ ProcModel.ItinDefList.resize(NumInstrSchedClasses);
// Insert each itinerary data record in the correct position within
// the processor model's ItinDefList.
for (unsigned i = 0, N = ItinRecords.size(); i < N; i++) {
Record *ItinData = ItinRecords[i];
Record *ItinDef = ItinData->getValueAsDef("TheClass");
- if (!SchedClassIdxMap.count(ItinDef->getName())) {
+ bool FoundClass = false;
+ for (SchedClassIter SCI = schedClassBegin(), SCE = schedClassEnd();
+ SCI != SCE; ++SCI) {
+ // Multiple SchedClasses may share an itinerary. Update all of them.
+ if (SCI->ItinClassDef == ItinDef) {
+ ProcModel.ItinDefList[SCI->Index] = ItinData;
+ FoundClass = true;
+ }
+ }
+ if (!FoundClass) {
DEBUG(dbgs() << ProcModel.ItinsDef->getName()
- << " has unused itinerary class " << ItinDef->getName() << '\n');
- continue;
+ << " missing class for itinerary " << ItinDef->getName() << '\n');
}
- assert(SchedClassIdxMap.count(ItinDef->getName()) && "missing ItinClass");
- unsigned Idx = SchedClassIdxMap.lookup(ItinDef->getName());
- assert(Idx <= NumItineraryClasses && "bad ItinClass index");
- ProcModel.ItinDefList[Idx] = ItinData;
}
// Check for missing itinerary entries.
assert(!ProcModel.ItinDefList[0] && "NoItinerary class can't have rec");
std::sort(ItinRWDefs.begin(), ItinRWDefs.end(), LessRecord());
for (RecIter II = ItinRWDefs.begin(), IE = ItinRWDefs.end(); II != IE; ++II) {
if (!(*II)->getValueInit("SchedModel")->isComplete())
- throw TGError((*II)->getLoc(), "SchedModel is undefined");
+ PrintFatalError((*II)->getLoc(), "SchedModel is undefined");
Record *ModelDef = (*II)->getValueAsDef("SchedModel");
ProcModelMapTy::const_iterator I = ProcModelMap.find(ModelDef);
if (I == ProcModelMap.end()) {
- throw TGError((*II)->getLoc(), "Undefined SchedMachineModel "
+ PrintFatalError((*II)->getLoc(), "Undefined SchedMachineModel "
+ ModelDef->getName());
}
ProcModels[I->second].ItinRWDefs.push_back(*II);
/// Infer new classes from existing classes. In the process, this may create new
/// SchedWrites from sequences of existing SchedWrites.
void CodeGenSchedModels::inferSchedClasses() {
+ DEBUG(dbgs() << NumInstrSchedClasses << " instr sched classes.\n");
+
// Visit all existing classes and newly created classes.
for (unsigned Idx = 0; Idx != SchedClasses.size(); ++Idx) {
+ assert(SchedClasses[Idx].Index == Idx && "bad SCIdx");
+
if (SchedClasses[Idx].ItinClassDef)
inferFromItinClass(SchedClasses[Idx].ItinClassDef, Idx);
- else if (!SchedClasses[Idx].InstRWs.empty())
+ if (!SchedClasses[Idx].InstRWs.empty())
inferFromInstRWs(Idx);
- else {
+ if (!SchedClasses[Idx].Writes.empty()) {
inferFromRW(SchedClasses[Idx].Writes, SchedClasses[Idx].Reads,
Idx, SchedClasses[Idx].ProcIndices);
}
if (!std::count(Matched.begin(), Matched.end(), ItinClassDef))
continue;
if (HasMatch)
- throw TGError((*II)->getLoc(), "Duplicate itinerary class "
+ PrintFatalError((*II)->getLoc(), "Duplicate itinerary class "
+ ItinClassDef->getName()
+ " in ItinResources for " + PM.ModelName);
HasMatch = true;
/// Infer classes from per-processor InstReadWrite definitions.
void CodeGenSchedModels::inferFromInstRWs(unsigned SCIdx) {
- const RecVec &RWDefs = SchedClasses[SCIdx].InstRWs;
- for (RecIter RWI = RWDefs.begin(), RWE = RWDefs.end(); RWI != RWE; ++RWI) {
- RecVec Instrs = (*RWI)->getValueAsListOfDefs("Instrs");
- RecIter II = Instrs.begin(), IE = Instrs.end();
+ for (unsigned I = 0, E = SchedClasses[SCIdx].InstRWs.size(); I != E; ++I) {
+ assert(SchedClasses[SCIdx].InstRWs.size() == E && "InstrRWs was mutated!");
+ Record *Rec = SchedClasses[SCIdx].InstRWs[I];
+ const RecVec *InstDefs = Sets.expand(Rec);
+ RecIter II = InstDefs->begin(), IE = InstDefs->end();
for (; II != IE; ++II) {
if (InstrClassMap[*II] == SCIdx)
break;
if (II == IE)
continue;
IdxVec Writes, Reads;
- findRWs((*RWI)->getValueAsListOfDefs("OperandReadWrites"), Writes, Reads);
- unsigned PIdx = getProcModel((*RWI)->getValueAsDef("SchedModel")).Index;
+ findRWs(Rec->getValueAsListOfDefs("OperandReadWrites"), Writes, Reads);
+ unsigned PIdx = getProcModel(Rec->getValueAsDef("SchedModel")).Index;
IdxVec ProcIndices(1, PIdx);
- inferFromRW(Writes, Reads, SCIdx, ProcIndices);
+ inferFromRW(Writes, Reads, SCIdx, ProcIndices); // May mutate SchedClasses.
}
}
namespace {
+// Helper for substituteVariantOperand.
+struct TransVariant {
+ Record *VarOrSeqDef; // Variant or sequence.
+ unsigned RWIdx; // Index of this variant or sequence's matched type.
+ unsigned ProcIdx; // Processor model index or zero for any.
+ unsigned TransVecIdx; // Index into PredTransitions::TransVec.
+
+ TransVariant(Record *def, unsigned rwi, unsigned pi, unsigned ti):
+ VarOrSeqDef(def), RWIdx(rwi), ProcIdx(pi), TransVecIdx(ti) {}
+};
+
// Associate a predicate with the SchedReadWrite that it guards.
// RWIdx is the index of the read/write variant.
struct PredCheck {
SmallVector<PredCheck, 4> PredTerm;
SmallVector<SmallVector<unsigned,4>, 16> WriteSequences;
SmallVector<SmallVector<unsigned,4>, 16> ReadSequences;
+ SmallVector<unsigned, 4> ProcIndices;
};
// Encapsulate a set of partially constructed transitions.
private:
bool mutuallyExclusive(Record *PredDef, ArrayRef<PredCheck> Term);
- void pushVariant(unsigned SchedRW, Record *Variant, PredTransition &Trans,
- bool IsRead);
+ void getIntersectingVariants(
+ const CodeGenSchedRW &SchedRW, unsigned TransIdx,
+ std::vector<TransVariant> &IntersectingVariants);
+ void pushVariant(const TransVariant &VInfo, bool IsRead);
};
} // anonymous
return false;
}
-// Push the Reads/Writes selected by this variant onto the given PredTransition.
-void PredTransitions::pushVariant(unsigned RWIdx, Record *Variant,
- PredTransition &Trans, bool IsRead) {
- Trans.PredTerm.push_back(
- PredCheck(IsRead, RWIdx, Variant->getValueAsDef("Predicate")));
- RecVec SelectedDefs = Variant->getValueAsListOfDefs("Selected");
+static bool hasAliasedVariants(const CodeGenSchedRW &RW,
+ CodeGenSchedModels &SchedModels) {
+ if (RW.HasVariants)
+ return true;
+
+ for (RecIter I = RW.Aliases.begin(), E = RW.Aliases.end(); I != E; ++I) {
+ const CodeGenSchedRW &AliasRW =
+ SchedModels.getSchedRW((*I)->getValueAsDef("AliasRW"));
+ if (AliasRW.HasVariants)
+ return true;
+ if (AliasRW.IsSequence) {
+ IdxVec ExpandedRWs;
+ SchedModels.expandRWSequence(AliasRW.Index, ExpandedRWs, AliasRW.IsRead);
+ for (IdxIter SI = ExpandedRWs.begin(), SE = ExpandedRWs.end();
+ SI != SE; ++SI) {
+ if (hasAliasedVariants(SchedModels.getSchedRW(*SI, AliasRW.IsRead),
+ SchedModels)) {
+ return true;
+ }
+ }
+ }
+ }
+ return false;
+}
+
+static bool hasVariant(ArrayRef<PredTransition> Transitions,
+ CodeGenSchedModels &SchedModels) {
+ for (ArrayRef<PredTransition>::iterator
+ PTI = Transitions.begin(), PTE = Transitions.end();
+ PTI != PTE; ++PTI) {
+ for (SmallVectorImpl<SmallVector<unsigned,4> >::const_iterator
+ WSI = PTI->WriteSequences.begin(), WSE = PTI->WriteSequences.end();
+ WSI != WSE; ++WSI) {
+ for (SmallVectorImpl<unsigned>::const_iterator
+ WI = WSI->begin(), WE = WSI->end(); WI != WE; ++WI) {
+ if (hasAliasedVariants(SchedModels.getSchedWrite(*WI), SchedModels))
+ return true;
+ }
+ }
+ for (SmallVectorImpl<SmallVector<unsigned,4> >::const_iterator
+ RSI = PTI->ReadSequences.begin(), RSE = PTI->ReadSequences.end();
+ RSI != RSE; ++RSI) {
+ for (SmallVectorImpl<unsigned>::const_iterator
+ RI = RSI->begin(), RE = RSI->end(); RI != RE; ++RI) {
+ if (hasAliasedVariants(SchedModels.getSchedRead(*RI), SchedModels))
+ return true;
+ }
+ }
+ }
+ return false;
+}
+
+// Populate IntersectingVariants with any variants or aliased sequences of the
+// given SchedRW whose processor indices and predicates are not mutually
+// exclusive with the given transition.
+void PredTransitions::getIntersectingVariants(
+ const CodeGenSchedRW &SchedRW, unsigned TransIdx,
+ std::vector<TransVariant> &IntersectingVariants) {
+
+ bool GenericRW = false;
+
+ std::vector<TransVariant> Variants;
+ if (SchedRW.HasVariants) {
+ unsigned VarProcIdx = 0;
+ if (SchedRW.TheDef->getValueInit("SchedModel")->isComplete()) {
+ Record *ModelDef = SchedRW.TheDef->getValueAsDef("SchedModel");
+ VarProcIdx = SchedModels.getProcModel(ModelDef).Index;
+ }
+ // Push each variant. Assign TransVecIdx later.
+ const RecVec VarDefs = SchedRW.TheDef->getValueAsListOfDefs("Variants");
+ for (RecIter RI = VarDefs.begin(), RE = VarDefs.end(); RI != RE; ++RI)
+ Variants.push_back(TransVariant(*RI, SchedRW.Index, VarProcIdx, 0));
+ if (VarProcIdx == 0)
+ GenericRW = true;
+ }
+ for (RecIter AI = SchedRW.Aliases.begin(), AE = SchedRW.Aliases.end();
+ AI != AE; ++AI) {
+ // If either the SchedAlias itself or the SchedReadWrite that it aliases
+ // to is defined within a processor model, constrain all variants to
+ // that processor.
+ unsigned AliasProcIdx = 0;
+ if ((*AI)->getValueInit("SchedModel")->isComplete()) {
+ Record *ModelDef = (*AI)->getValueAsDef("SchedModel");
+ AliasProcIdx = SchedModels.getProcModel(ModelDef).Index;
+ }
+ const CodeGenSchedRW &AliasRW =
+ SchedModels.getSchedRW((*AI)->getValueAsDef("AliasRW"));
+
+ if (AliasRW.HasVariants) {
+ const RecVec VarDefs = AliasRW.TheDef->getValueAsListOfDefs("Variants");
+ for (RecIter RI = VarDefs.begin(), RE = VarDefs.end(); RI != RE; ++RI)
+ Variants.push_back(TransVariant(*RI, AliasRW.Index, AliasProcIdx, 0));
+ }
+ if (AliasRW.IsSequence) {
+ Variants.push_back(
+ TransVariant(AliasRW.TheDef, SchedRW.Index, AliasProcIdx, 0));
+ }
+ if (AliasProcIdx == 0)
+ GenericRW = true;
+ }
+ for (unsigned VIdx = 0, VEnd = Variants.size(); VIdx != VEnd; ++VIdx) {
+ TransVariant &Variant = Variants[VIdx];
+ // Don't expand variants if the processor models don't intersect.
+ // A zero processor index means any processor.
+ SmallVectorImpl<unsigned> &ProcIndices = TransVec[TransIdx].ProcIndices;
+ if (ProcIndices[0] && Variants[VIdx].ProcIdx) {
+ unsigned Cnt = std::count(ProcIndices.begin(), ProcIndices.end(),
+ Variant.ProcIdx);
+ if (!Cnt)
+ continue;
+ if (Cnt > 1) {
+ const CodeGenProcModel &PM =
+ *(SchedModels.procModelBegin() + Variant.ProcIdx);
+ PrintFatalError(Variant.VarOrSeqDef->getLoc(),
+ "Multiple variants defined for processor " +
+ PM.ModelName +
+ " Ensure only one SchedAlias exists per RW.");
+ }
+ }
+ if (Variant.VarOrSeqDef->isSubClassOf("SchedVar")) {
+ Record *PredDef = Variant.VarOrSeqDef->getValueAsDef("Predicate");
+ if (mutuallyExclusive(PredDef, TransVec[TransIdx].PredTerm))
+ continue;
+ }
+ if (IntersectingVariants.empty()) {
+ // The first variant builds on the existing transition.
+ Variant.TransVecIdx = TransIdx;
+ IntersectingVariants.push_back(Variant);
+ }
+ else {
+ // Push another copy of the current transition for more variants.
+ Variant.TransVecIdx = TransVec.size();
+ IntersectingVariants.push_back(Variant);
+ TransVec.push_back(TransVec[TransIdx]);
+ }
+ }
+ if (GenericRW && IntersectingVariants.empty()) {
+ PrintFatalError(SchedRW.TheDef->getLoc(), "No variant of this type has "
+ "a matching predicate on any processor");
+ }
+}
+
+// Push the Reads/Writes selected by this variant onto the PredTransition
+// specified by VInfo.
+void PredTransitions::
+pushVariant(const TransVariant &VInfo, bool IsRead) {
+
+ PredTransition &Trans = TransVec[VInfo.TransVecIdx];
+
+ // If this operand transition is reached through a processor-specific alias,
+ // then the whole transition is specific to this processor.
+ if (VInfo.ProcIdx != 0)
+ Trans.ProcIndices.assign(1, VInfo.ProcIdx);
+
IdxVec SelectedRWs;
- SchedModels.findRWs(SelectedDefs, SelectedRWs, IsRead);
+ if (VInfo.VarOrSeqDef->isSubClassOf("SchedVar")) {
+ Record *PredDef = VInfo.VarOrSeqDef->getValueAsDef("Predicate");
+ Trans.PredTerm.push_back(PredCheck(IsRead, VInfo.RWIdx,PredDef));
+ RecVec SelectedDefs = VInfo.VarOrSeqDef->getValueAsListOfDefs("Selected");
+ SchedModels.findRWs(SelectedDefs, SelectedRWs, IsRead);
+ }
+ else {
+ assert(VInfo.VarOrSeqDef->isSubClassOf("WriteSequence") &&
+ "variant must be a SchedVariant or aliased WriteSequence");
+ SelectedRWs.push_back(SchedModels.getSchedRWIdx(VInfo.VarOrSeqDef, IsRead));
+ }
- const CodeGenSchedRW &SchedRW = SchedModels.getSchedRW(RWIdx, IsRead);
+ const CodeGenSchedRW &SchedRW = SchedModels.getSchedRW(VInfo.RWIdx, IsRead);
SmallVectorImpl<SmallVector<unsigned,4> > &RWSequences = IsRead
? Trans.ReadSequences : Trans.WriteSequences;
unsigned OperIdx = RWSequences.size()-1;
// Make N-1 copies of this transition's last sequence.
for (unsigned i = 1, e = SelectedRWs.size(); i != e; ++i) {
+ // Create a temporary copy the vector could reallocate.
+ RWSequences.reserve(RWSequences.size() + 1);
RWSequences.push_back(RWSequences[OperIdx]);
}
// Push each of the N elements of the SelectedRWs onto a copy of the last
// RWSeq is a sequence of all Reads or all Writes for the next read or write
// operand. StartIdx is an index into TransVec where partial results
-// starts. RWSeq must be applied to all tranistions between StartIdx and the end
+// starts. RWSeq must be applied to all transitions between StartIdx and the end
// of TransVec.
void PredTransitions::substituteVariantOperand(
const SmallVectorImpl<unsigned> &RWSeq, bool IsRead, unsigned StartIdx) {
for (unsigned TransIdx = StartIdx, TransEnd = TransVec.size();
TransIdx != TransEnd; ++TransIdx) {
// In the common case, push RW onto the current operand's sequence.
- if (!SchedRW.HasVariants) {
+ if (!hasAliasedVariants(SchedRW, SchedModels)) {
if (IsRead)
TransVec[TransIdx].ReadSequences.back().push_back(*RWI);
else
continue;
}
// Distribute this partial PredTransition across intersecting variants.
- RecVec Variants = SchedRW.TheDef->getValueAsListOfDefs("Variants");
- std::vector<std::pair<Record*,unsigned> > IntersectingVariants;
- for (RecIter VI = Variants.begin(), VE = Variants.end(); VI != VE; ++VI) {
- Record *PredDef = (*VI)->getValueAsDef("Predicate");
- if (mutuallyExclusive(PredDef, TransVec[TransIdx].PredTerm))
- continue;
- if (IntersectingVariants.empty())
- // The first variant builds on the existing transition.
- IntersectingVariants.push_back(std::make_pair(*VI, TransIdx));
- else {
- // Push another copy of the current transition for more variants.
- IntersectingVariants.push_back(
- std::make_pair(*VI, TransVec.size()));
- TransVec.push_back(TransVec[TransIdx]);
- }
- }
+ // This will push a copies of TransVec[TransIdx] on the back of TransVec.
+ std::vector<TransVariant> IntersectingVariants;
+ getIntersectingVariants(SchedRW, TransIdx, IntersectingVariants);
// Now expand each variant on top of its copy of the transition.
- for (std::vector<std::pair<Record*, unsigned> >::const_iterator
+ for (std::vector<TransVariant>::const_iterator
IVI = IntersectingVariants.begin(),
IVE = IntersectingVariants.end();
- IVI != IVE; ++IVI)
- pushVariant(*RWI, IVI->first, TransVec[IVI->second], IsRead);
+ IVI != IVE; ++IVI) {
+ pushVariant(*IVI, IsRead);
+ }
}
}
}
unsigned StartIdx = TransVec.size();
TransVec.resize(TransVec.size() + 1);
TransVec.back().PredTerm = Trans.PredTerm;
+ TransVec.back().ProcIndices = Trans.ProcIndices;
// Visit each original write sequence.
for (SmallVectorImpl<SmallVector<unsigned,4> >::const_iterator
}
}
-static bool hasVariant(ArrayRef<PredTransition> Transitions,
- CodeGenSchedModels &SchedModels) {
- for (ArrayRef<PredTransition>::iterator
- PTI = Transitions.begin(), PTE = Transitions.end();
- PTI != PTE; ++PTI) {
- for (SmallVectorImpl<SmallVector<unsigned,4> >::const_iterator
- WSI = PTI->WriteSequences.begin(), WSE = PTI->WriteSequences.end();
- WSI != WSE; ++WSI) {
- for (SmallVectorImpl<unsigned>::const_iterator
- WI = WSI->begin(), WE = WSI->end(); WI != WE; ++WI) {
- if (SchedModels.getSchedWrite(*WI).HasVariants)
- return true;
- }
- }
- for (SmallVectorImpl<SmallVector<unsigned,4> >::const_iterator
- RSI = PTI->ReadSequences.begin(), RSE = PTI->ReadSequences.end();
- RSI != RSE; ++RSI) {
- for (SmallVectorImpl<unsigned>::const_iterator
- RI = RSI->begin(), RE = RSI->end(); RI != RE; ++RI) {
- if (SchedModels.getSchedRead(*RI).HasVariants)
- return true;
- }
- }
- }
- return false;
-}
-
// Create a new SchedClass for each variant found by inferFromRW. Pass
-// ProcIndices by copy to avoid referencing anything from SchedClasses.
static void inferFromTransitions(ArrayRef<PredTransition> LastTransitions,
- unsigned FromClassIdx, IdxVec ProcIndices,
+ unsigned FromClassIdx,
CodeGenSchedModels &SchedModels) {
// For each PredTransition, create a new CodeGenSchedTransition, which usually
// requires creating a new SchedClass.
for (SmallVectorImpl<SmallVector<unsigned,4> >::const_iterator
RSI = I->ReadSequences.begin(), RSE = I->ReadSequences.end();
RSI != RSE; ++RSI) {
- // Create a new write representing the expanded sequence.
+ // Create a new read representing the expanded sequence.
OperReadsVariant.push_back(
SchedModels.findOrInsertRW(*RSI, /*IsRead=*/true));
}
+ IdxVec ProcIndices(I->ProcIndices.begin(), I->ProcIndices.end());
CodeGenSchedTransition SCTrans;
SCTrans.ToClassIdx =
- SchedModels.addSchedClass(OperWritesVariant, OperReadsVariant,
- ProcIndices);
+ SchedModels.addSchedClass(/*ItinClassDef=*/nullptr, OperWritesVariant,
+ OperReadsVariant, ProcIndices);
SCTrans.ProcIndices = ProcIndices;
// The final PredTerm is unique set of predicates guarding the transition.
RecVec Preds;
}
}
-/// Find each variant write that OperWrites or OperaReads refers to and create a
-/// new SchedClass for each variant.
+// Create new SchedClasses for the given ReadWrite list. If any of the
+// ReadWrites refers to a SchedVariant, create a new SchedClass for each variant
+// of the ReadWrite list, following Aliases if necessary.
void CodeGenSchedModels::inferFromRW(const IdxVec &OperWrites,
const IdxVec &OperReads,
unsigned FromClassIdx,
const IdxVec &ProcIndices) {
- DEBUG(dbgs() << "INFERRW Writes: ");
+ DEBUG(dbgs() << "INFER RW proc("; dumpIdxVec(ProcIndices); dbgs() << ") ");
// Create a seed transition with an empty PredTerm and the expanded sequences
// of SchedWrites for the current SchedClass.
std::vector<PredTransition> LastTransitions;
LastTransitions.resize(1);
+ LastTransitions.back().ProcIndices.append(ProcIndices.begin(),
+ ProcIndices.end());
+
for (IdxIter I = OperWrites.begin(), E = OperWrites.end(); I != E; ++I) {
IdxVec WriteSeq;
expandRWSequence(*I, WriteSeq, /*IsRead=*/false);
// WARNING: We are about to mutate the SchedClasses vector. Do not refer to
// OperWrites, OperReads, or ProcIndices after calling inferFromTransitions.
- inferFromTransitions(LastTransitions, FromClassIdx, ProcIndices, *this);
+ inferFromTransitions(LastTransitions, FromClassIdx, *this);
+}
+
+// Check if any processor resource group contains all resource records in
+// SubUnits.
+bool CodeGenSchedModels::hasSuperGroup(RecVec &SubUnits, CodeGenProcModel &PM) {
+ for (unsigned i = 0, e = PM.ProcResourceDefs.size(); i < e; ++i) {
+ if (!PM.ProcResourceDefs[i]->isSubClassOf("ProcResGroup"))
+ continue;
+ RecVec SuperUnits =
+ PM.ProcResourceDefs[i]->getValueAsListOfDefs("Resources");
+ RecIter RI = SubUnits.begin(), RE = SubUnits.end();
+ for ( ; RI != RE; ++RI) {
+ if (std::find(SuperUnits.begin(), SuperUnits.end(), *RI)
+ == SuperUnits.end()) {
+ break;
+ }
+ }
+ if (RI == RE)
+ return true;
+ }
+ return false;
+}
+
+// Verify that overlapping groups have a common supergroup.
+void CodeGenSchedModels::verifyProcResourceGroups(CodeGenProcModel &PM) {
+ for (unsigned i = 0, e = PM.ProcResourceDefs.size(); i < e; ++i) {
+ if (!PM.ProcResourceDefs[i]->isSubClassOf("ProcResGroup"))
+ continue;
+ RecVec CheckUnits =
+ PM.ProcResourceDefs[i]->getValueAsListOfDefs("Resources");
+ for (unsigned j = i+1; j < e; ++j) {
+ if (!PM.ProcResourceDefs[j]->isSubClassOf("ProcResGroup"))
+ continue;
+ RecVec OtherUnits =
+ PM.ProcResourceDefs[j]->getValueAsListOfDefs("Resources");
+ if (std::find_first_of(CheckUnits.begin(), CheckUnits.end(),
+ OtherUnits.begin(), OtherUnits.end())
+ != CheckUnits.end()) {
+ // CheckUnits and OtherUnits overlap
+ OtherUnits.insert(OtherUnits.end(), CheckUnits.begin(),
+ CheckUnits.end());
+ if (!hasSuperGroup(OtherUnits, PM)) {
+ PrintFatalError((PM.ProcResourceDefs[i])->getLoc(),
+ "proc resource group overlaps with "
+ + PM.ProcResourceDefs[j]->getName()
+ + " but no supergroup contains both.");
+ }
+ }
+ }
+ }
}
// Collect and sort WriteRes, ReadAdvance, and ProcResources.
SCI != SCE; ++SCI) {
if (SCI->ItinClassDef)
collectItinProcResources(SCI->ItinClassDef);
- else
+ else {
+ // This class may have a default ReadWrite list which can be overriden by
+ // InstRW definitions.
+ if (!SCI->InstRWs.empty()) {
+ for (RecIter RWI = SCI->InstRWs.begin(), RWE = SCI->InstRWs.end();
+ RWI != RWE; ++RWI) {
+ Record *RWModelDef = (*RWI)->getValueAsDef("SchedModel");
+ IdxVec ProcIndices(1, getProcModel(RWModelDef).Index);
+ IdxVec Writes, Reads;
+ findRWs((*RWI)->getValueAsListOfDefs("OperandReadWrites"),
+ Writes, Reads);
+ collectRWResources(Writes, Reads, ProcIndices);
+ }
+ }
collectRWResources(SCI->Writes, SCI->Reads, SCI->ProcIndices);
+ }
}
// Add resources separately defined by each subtarget.
RecVec WRDefs = Records.getAllDerivedDefinitions("WriteRes");
Record *ModelDef = (*WRI)->getValueAsDef("SchedModel");
addWriteRes(*WRI, getProcModel(ModelDef).Index);
}
+ RecVec SWRDefs = Records.getAllDerivedDefinitions("SchedWriteRes");
+ for (RecIter WRI = SWRDefs.begin(), WRE = SWRDefs.end(); WRI != WRE; ++WRI) {
+ Record *ModelDef = (*WRI)->getValueAsDef("SchedModel");
+ addWriteRes(*WRI, getProcModel(ModelDef).Index);
+ }
RecVec RADefs = Records.getAllDerivedDefinitions("ReadAdvance");
for (RecIter RAI = RADefs.begin(), RAE = RADefs.end(); RAI != RAE; ++RAI) {
Record *ModelDef = (*RAI)->getValueAsDef("SchedModel");
addReadAdvance(*RAI, getProcModel(ModelDef).Index);
}
+ RecVec SRADefs = Records.getAllDerivedDefinitions("SchedReadAdvance");
+ for (RecIter RAI = SRADefs.begin(), RAE = SRADefs.end(); RAI != RAE; ++RAI) {
+ if ((*RAI)->getValueInit("SchedModel")->isComplete()) {
+ Record *ModelDef = (*RAI)->getValueAsDef("SchedModel");
+ addReadAdvance(*RAI, getProcModel(ModelDef).Index);
+ }
+ }
+ // Add ProcResGroups that are defined within this processor model, which may
+ // not be directly referenced but may directly specify a buffer size.
+ RecVec ProcResGroups = Records.getAllDerivedDefinitions("ProcResGroup");
+ for (RecIter RI = ProcResGroups.begin(), RE = ProcResGroups.end();
+ RI != RE; ++RI) {
+ if (!(*RI)->getValueInit("SchedModel")->isComplete())
+ continue;
+ CodeGenProcModel &PM = getProcModel((*RI)->getValueAsDef("SchedModel"));
+ RecIter I = std::find(PM.ProcResourceDefs.begin(),
+ PM.ProcResourceDefs.end(), *RI);
+ if (I == PM.ProcResourceDefs.end())
+ PM.ProcResourceDefs.push_back(*RI);
+ }
// Finalize each ProcModel by sorting the record arrays.
- for (unsigned PIdx = 0, PEnd = ProcModels.size(); PIdx != PEnd; ++PIdx) {
- CodeGenProcModel &PM = ProcModels[PIdx];
+ for (CodeGenProcModel &PM : ProcModels) {
std::sort(PM.WriteResDefs.begin(), PM.WriteResDefs.end(),
LessRecord());
std::sort(PM.ReadAdvanceDefs.begin(), PM.ReadAdvanceDefs.end(),
dbgs() << (*RI)->getName() << " ";
}
dbgs() << '\n');
+ verifyProcResourceGroups(PM);
}
}
if (!std::count(Matched.begin(), Matched.end(), ItinClassDef))
continue;
if (HasMatch)
- throw TGError((*II)->getLoc(), "Duplicate itinerary class "
- + ItinClassDef->getName()
- + " in ItinResources for " + PM.ModelName);
+ PrintFatalError((*II)->getLoc(), "Duplicate itinerary class "
+ + ItinClassDef->getName()
+ + " in ItinResources for " + PM.ModelName);
HasMatch = true;
IdxVec Writes, Reads;
findRWs((*II)->getValueAsListOfDefs("OperandReadWrites"), Writes, Reads);
}
}
-
-// Collect resources for a set of read/write types and processor indices.
-void CodeGenSchedModels::collectRWResources(const IdxVec &Writes,
- const IdxVec &Reads,
+void CodeGenSchedModels::collectRWResources(unsigned RWIdx, bool IsRead,
const IdxVec &ProcIndices) {
-
- for (IdxIter WI = Writes.begin(), WE = Writes.end(); WI != WE; ++WI) {
- const CodeGenSchedRW &SchedRW = getSchedRW(*WI, /*IsRead=*/false);
- if (SchedRW.TheDef && SchedRW.TheDef->isSubClassOf("SchedWriteRes")) {
+ const CodeGenSchedRW &SchedRW = getSchedRW(RWIdx, IsRead);
+ if (SchedRW.TheDef) {
+ if (!IsRead && SchedRW.TheDef->isSubClassOf("SchedWriteRes")) {
for (IdxIter PI = ProcIndices.begin(), PE = ProcIndices.end();
PI != PE; ++PI) {
addWriteRes(SchedRW.TheDef, *PI);
}
}
- }
- for (IdxIter RI = Reads.begin(), RE = Reads.end(); RI != RE; ++RI) {
- const CodeGenSchedRW &SchedRW = getSchedRW(*RI, /*IsRead=*/true);
- if (SchedRW.TheDef && SchedRW.TheDef->isSubClassOf("SchedReadAdvance")) {
+ else if (IsRead && SchedRW.TheDef->isSubClassOf("SchedReadAdvance")) {
for (IdxIter PI = ProcIndices.begin(), PE = ProcIndices.end();
PI != PE; ++PI) {
addReadAdvance(SchedRW.TheDef, *PI);
}
}
}
+ for (RecIter AI = SchedRW.Aliases.begin(), AE = SchedRW.Aliases.end();
+ AI != AE; ++AI) {
+ IdxVec AliasProcIndices;
+ if ((*AI)->getValueInit("SchedModel")->isComplete()) {
+ AliasProcIndices.push_back(
+ getProcModel((*AI)->getValueAsDef("SchedModel")).Index);
+ }
+ else
+ AliasProcIndices = ProcIndices;
+ const CodeGenSchedRW &AliasRW = getSchedRW((*AI)->getValueAsDef("AliasRW"));
+ assert(AliasRW.IsRead == IsRead && "cannot alias reads to writes");
+
+ IdxVec ExpandedRWs;
+ expandRWSequence(AliasRW.Index, ExpandedRWs, IsRead);
+ for (IdxIter SI = ExpandedRWs.begin(), SE = ExpandedRWs.end();
+ SI != SE; ++SI) {
+ collectRWResources(*SI, IsRead, AliasProcIndices);
+ }
+ }
+}
+
+// Collect resources for a set of read/write types and processor indices.
+void CodeGenSchedModels::collectRWResources(const IdxVec &Writes,
+ const IdxVec &Reads,
+ const IdxVec &ProcIndices) {
+
+ for (IdxIter WI = Writes.begin(), WE = Writes.end(); WI != WE; ++WI)
+ collectRWResources(*WI, /*IsRead=*/false, ProcIndices);
+
+ for (IdxIter RI = Reads.begin(), RE = Reads.end(); RI != RE; ++RI)
+ collectRWResources(*RI, /*IsRead=*/true, ProcIndices);
}
+
// Find the processor's resource units for this kind of resource.
Record *CodeGenSchedModels::findProcResUnits(Record *ProcResKind,
const CodeGenProcModel &PM) const {
if (ProcResKind->isSubClassOf("ProcResourceUnits"))
return ProcResKind;
- Record *ProcUnitDef = 0;
+ Record *ProcUnitDef = nullptr;
RecVec ProcResourceDefs =
Records.getAllDerivedDefinitions("ProcResourceUnits");
if ((*RI)->getValueAsDef("Kind") == ProcResKind
&& (*RI)->getValueAsDef("SchedModel") == PM.ModelDef) {
if (ProcUnitDef) {
- throw TGError((*RI)->getLoc(),
- "Multiple ProcessorResourceUnits associated with "
- + ProcResKind->getName());
+ PrintFatalError((*RI)->getLoc(),
+ "Multiple ProcessorResourceUnits associated with "
+ + ProcResKind->getName());
+ }
+ ProcUnitDef = *RI;
+ }
+ }
+ RecVec ProcResGroups = Records.getAllDerivedDefinitions("ProcResGroup");
+ for (RecIter RI = ProcResGroups.begin(), RE = ProcResGroups.end();
+ RI != RE; ++RI) {
+
+ if (*RI == ProcResKind
+ && (*RI)->getValueAsDef("SchedModel") == PM.ModelDef) {
+ if (ProcUnitDef) {
+ PrintFatalError((*RI)->getLoc(),
+ "Multiple ProcessorResourceUnits associated with "
+ + ProcResKind->getName());
}
ProcUnitDef = *RI;
}
}
if (!ProcUnitDef) {
- throw TGError(ProcResKind->getLoc(),
- "No ProcessorResources associated with "
- + ProcResKind->getName());
+ PrintFatalError(ProcResKind->getLoc(),
+ "No ProcessorResources associated with "
+ + ProcResKind->getName());
}
return ProcUnitDef;
}
return;
PM.ProcResourceDefs.push_back(ProcResUnits);
+ if (ProcResUnits->isSubClassOf("ProcResGroup"))
+ return;
+
if (!ProcResUnits->getValueInit("Super")->isComplete())
return;
// Add resources for a SchedWrite to this processor if they don't exist.
void CodeGenSchedModels::addWriteRes(Record *ProcWriteResDef, unsigned PIdx) {
+ assert(PIdx && "don't add resources to an invalid Processor model");
+
RecVec &WRDefs = ProcModels[PIdx].WriteResDefs;
RecIter WRI = std::find(WRDefs.begin(), WRDefs.end(), ProcWriteResDef);
if (WRI != WRDefs.end())
RecIter PRPos = std::find(ProcResourceDefs.begin(), ProcResourceDefs.end(),
PRDef);
if (PRPos == ProcResourceDefs.end())
- throw TGError(PRDef->getLoc(), "ProcResource def is not included in "
- "the ProcResources list for " + ModelName);
+ PrintFatalError(PRDef->getLoc(), "ProcResource def is not included in "
+ "the ProcResources list for " + ModelName);
// Idx=0 is reserved for invalid.
- return 1 + PRPos - ProcResourceDefs.begin();
+ return 1 + (PRPos - ProcResourceDefs.begin());
}
#ifndef NDEBUG
}
void CodeGenSchedClass::dump(const CodeGenSchedModels* SchedModels) const {
- dbgs() << "SCHEDCLASS " << Name << '\n'
+ dbgs() << "SCHEDCLASS " << Index << ":" << Name << '\n'
<< " Writes: ";
for (unsigned i = 0, N = Writes.size(); i < N; ++i) {
SchedModels->getSchedWrite(Writes[i]).dump();
}
}
dbgs() << "\n ProcIdx: "; dumpIdxVec(ProcIndices); dbgs() << '\n';
+ if (!Transitions.empty()) {
+ dbgs() << "\n Transitions for Proc ";
+ for (std::vector<CodeGenSchedTransition>::const_iterator
+ TI = Transitions.begin(), TE = Transitions.end(); TI != TE; ++TI) {
+ dumpIdxVec(TI->ProcIndices);
+ }
+ }
}
void PredTransitions::dump() const {
projects / oota-llvm.git / blobdiff