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//===- GlobalISelMatchTableExecutorEmitter.cpp ----------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "GlobalISelMatchTableExecutorEmitter.h"
#include "GlobalISelMatchTable.h"
using namespace llvm;
using namespace llvm::gi;
void GlobalISelMatchTableExecutorEmitter::emitSubtargetFeatureBitsetImpl(
raw_ostream &OS, ArrayRef<RuleMatcher> Rules) {
SubtargetFeatureInfo::emitSubtargetFeatureBitEnumeration(SubtargetFeatures,
OS, &HwModes);
// Separate subtarget features by how often they must be recomputed.
SubtargetFeatureInfoMap ModuleFeatures;
std::copy_if(SubtargetFeatures.begin(), SubtargetFeatures.end(),
std::inserter(ModuleFeatures, ModuleFeatures.end()),
[](const SubtargetFeatureInfoMap::value_type &X) {
return !X.second.mustRecomputePerFunction();
});
SubtargetFeatureInfoMap FunctionFeatures;
std::copy_if(SubtargetFeatures.begin(), SubtargetFeatures.end(),
std::inserter(FunctionFeatures, FunctionFeatures.end()),
[](const SubtargetFeatureInfoMap::value_type &X) {
return X.second.mustRecomputePerFunction();
});
SubtargetFeatureInfo::emitComputeAvailableFeatures(
getTarget().getName(), getClassName(), "computeAvailableModuleFeatures",
ModuleFeatures, OS, "", &HwModes);
OS << "void " << getClassName()
<< "::setupGeneratedPerFunctionState(MachineFunction &MF) {\n"
" AvailableFunctionFeatures = computeAvailableFunctionFeatures("
"(const "
<< getTarget().getName()
<< "Subtarget *)&MF.getSubtarget(), &MF);\n"
"}\n";
SubtargetFeatureInfo::emitComputeAvailableFeatures(
getTarget().getName(), getClassName(), "computeAvailableFunctionFeatures",
FunctionFeatures, OS, "const MachineFunction *MF");
// Emit a table containing the PredicateBitsets objects needed by the matcher
// and an enum for the matcher to reference them with.
std::vector<std::pair<std::vector<Record *>, int>> FeatureBitsets;
FeatureBitsets.reserve(Rules.size());
for (auto &Rule : Rules)
FeatureBitsets.emplace_back(Rule.getRequiredFeatures(),
Rule.getHwModeIdx());
llvm::sort(FeatureBitsets,
[&](const std::pair<std::vector<Record *>, int> &A,
const std::pair<std::vector<Record *>, int> &B) {
if (A.first.size() < B.first.size())
return true;
if (A.first.size() > B.first.size())
return false;
for (auto [First, Second] : zip(A.first, B.first)) {
if (First->getName() < Second->getName())
return true;
if (First->getName() > Second->getName())
return false;
}
return (A.second < B.second);
});
FeatureBitsets.erase(
std::unique(FeatureBitsets.begin(), FeatureBitsets.end()),
FeatureBitsets.end());
OS << "// Feature bitsets.\n"
<< "enum {\n"
<< " GIFBS_Invalid,\n";
for (const auto &FeatureBitset : FeatureBitsets) {
if (FeatureBitset.first.empty() && FeatureBitset.second < 0)
continue;
OS << " "
<< getNameForFeatureBitset(FeatureBitset.first, FeatureBitset.second)
<< ",\n";
}
OS << "};\n"
<< "constexpr static PredicateBitset FeatureBitsets[] {\n"
<< " {}, // GIFBS_Invalid\n";
for (const auto &FeatureBitset : FeatureBitsets) {
if (FeatureBitset.first.empty() && FeatureBitset.second < 0)
continue;
OS << " {";
for (const auto &Feature : FeatureBitset.first) {
const auto &I = SubtargetFeatures.find(Feature);
assert(I != SubtargetFeatures.end() && "Didn't import predicate?");
OS << I->second.getEnumBitName() << ", ";
}
// HwModeIdx
if (FeatureBitset.second >= 0) {
OS << "Feature_HwMode" << FeatureBitset.second << "Bit, ";
}
OS << "},\n";
}
OS << "};\n\n";
}
void GlobalISelMatchTableExecutorEmitter::emitComplexPredicates(
raw_ostream &OS, ArrayRef<Record *> ComplexOperandMatchers) {
// Emit complex predicate table and an enum to reference them with.
OS << "// ComplexPattern predicates.\n"
<< "enum {\n"
<< " GICP_Invalid,\n";
for (const auto &Record : ComplexOperandMatchers)
OS << " GICP_" << Record->getName() << ",\n";
OS << "};\n"
<< "// See constructor for table contents\n\n";
OS << getClassName() << "::ComplexMatcherMemFn\n"
<< getClassName() << "::ComplexPredicateFns[] = {\n"
<< " nullptr, // GICP_Invalid\n";
for (const auto &Record : ComplexOperandMatchers)
OS << " &" << getClassName()
<< "::" << Record->getValueAsString("MatcherFn") << ", // "
<< Record->getName() << "\n";
OS << "};\n\n";
}
void GlobalISelMatchTableExecutorEmitter::emitCustomOperandRenderers(
raw_ostream &OS, ArrayRef<StringRef> CustomOperandRenderers) {
OS << "// Custom renderers.\n"
<< "enum {\n"
<< " GICR_Invalid,\n";
for (const auto &Fn : CustomOperandRenderers)
OS << " GICR_" << Fn << ",\n";
OS << "};\n";
OS << getClassName() << "::CustomRendererFn\n"
<< getClassName() << "::CustomRenderers[] = {\n"
<< " nullptr, // GICR_Invalid\n";
for (const auto &Fn : CustomOperandRenderers)
OS << " &" << getClassName() << "::" << Fn << ",\n";
OS << "};\n\n";
}
void GlobalISelMatchTableExecutorEmitter::emitTypeObjects(
raw_ostream &OS, ArrayRef<LLTCodeGen> TypeObjects) {
OS << "// LLT Objects.\n"
<< "enum {\n";
for (const auto &TypeObject : TypeObjects) {
OS << " ";
TypeObject.emitCxxEnumValue(OS);
OS << ",\n";
}
OS << "};\n"
<< "const static size_t NumTypeObjects = " << TypeObjects.size() << ";\n"
<< "const static LLT TypeObjects[] = {\n";
for (const auto &TypeObject : TypeObjects) {
OS << " ";
TypeObject.emitCxxConstructorCall(OS);
OS << ",\n";
}
OS << "};\n\n";
}
void GlobalISelMatchTableExecutorEmitter::emitMatchTable(
raw_ostream &OS, const MatchTable &Table) {
emitEncodingMacrosDef(OS);
OS << "const uint8_t *" << getClassName() << "::getMatchTable() const {\n";
Table.emitDeclaration(OS);
OS << " return ";
Table.emitUse(OS);
OS << ";\n}\n";
emitEncodingMacrosUndef(OS);
OS << "\n";
}
void GlobalISelMatchTableExecutorEmitter::emitExecutorImpl(
raw_ostream &OS, const MatchTable &Table, ArrayRef<LLTCodeGen> TypeObjects,
ArrayRef<RuleMatcher> Rules, ArrayRef<Record *> ComplexOperandMatchers,
ArrayRef<StringRef> CustomOperandRenderers, StringRef IfDefName) {
OS << "#ifdef " << IfDefName << "\n";
emitTypeObjects(OS, TypeObjects);
emitSubtargetFeatureBitsetImpl(OS, Rules);
emitComplexPredicates(OS, ComplexOperandMatchers);
emitMIPredicateFns(OS);
emitI64ImmPredicateFns(OS);
emitAPFloatImmPredicateFns(OS);
emitAPIntImmPredicateFns(OS);
emitTestSimplePredicate(OS);
emitCustomOperandRenderers(OS, CustomOperandRenderers);
emitAdditionalImpl(OS);
emitRunCustomAction(OS);
emitMatchTable(OS, Table);
OS << "#endif // ifdef " << IfDefName << "\n\n";
}
void GlobalISelMatchTableExecutorEmitter::emitPredicateBitset(
raw_ostream &OS, StringRef IfDefName) {
unsigned Size = SubtargetFeatures.size() + HwModes.size();
OS << "#ifdef " << IfDefName << "\n"
<< "const unsigned MAX_SUBTARGET_PREDICATES = " << Size << ";\n"
<< "using PredicateBitset = "
"llvm::Bitset<MAX_SUBTARGET_PREDICATES>;\n"
<< "#endif // ifdef " << IfDefName << "\n\n";
}
void GlobalISelMatchTableExecutorEmitter::emitTemporariesDecl(
raw_ostream &OS, StringRef IfDefName) {
OS << "#ifdef " << IfDefName << "\n"
<< " mutable MatcherState State;\n"
<< " typedef "
"ComplexRendererFns("
<< getClassName() << "::*ComplexMatcherMemFn)(MachineOperand &) const;\n"
<< " typedef void(" << getClassName()
<< "::*CustomRendererFn)(MachineInstrBuilder &, const "
"MachineInstr &, int) "
"const;\n"
<< " const ExecInfoTy<PredicateBitset, ComplexMatcherMemFn, "
"CustomRendererFn> "
"ExecInfo;\n"
<< " static " << getClassName()
<< "::ComplexMatcherMemFn ComplexPredicateFns[];\n"
<< " static " << getClassName()
<< "::CustomRendererFn CustomRenderers[];\n"
<< " bool testImmPredicate_I64(unsigned PredicateID, int64_t Imm) const "
"override;\n"
<< " bool testImmPredicate_APInt(unsigned PredicateID, const APInt &Imm) "
"const override;\n"
<< " bool testImmPredicate_APFloat(unsigned PredicateID, const APFloat "
"&Imm) const override;\n"
<< " const uint8_t *getMatchTable() const override;\n"
<< " bool testMIPredicate_MI(unsigned PredicateID, const MachineInstr &MI"
", const MatcherState &State) "
"const override;\n"
<< " bool testSimplePredicate(unsigned PredicateID) const override;\n"
<< " void runCustomAction(unsigned FnID, const MatcherState &State, "
"NewMIVector &OutMIs) "
"const override;\n";
emitAdditionalTemporariesDecl(OS, " ");
OS << "#endif // ifdef " << IfDefName << "\n\n";
}
void GlobalISelMatchTableExecutorEmitter::emitTemporariesInit(
raw_ostream &OS, unsigned MaxTemporaries, StringRef IfDefName) {
OS << "#ifdef " << IfDefName << "\n"
<< ", State(" << MaxTemporaries << "),\n"
<< "ExecInfo(TypeObjects, NumTypeObjects, FeatureBitsets"
<< ", ComplexPredicateFns, CustomRenderers)\n"
<< "#endif // ifdef " << IfDefName << "\n\n";
emitAdditionalTemporariesInit(OS);
}
void GlobalISelMatchTableExecutorEmitter::emitPredicatesDecl(
raw_ostream &OS, StringRef IfDefName) {
OS << "#ifdef " << IfDefName << "\n"
<< "PredicateBitset AvailableModuleFeatures;\n"
<< "mutable PredicateBitset AvailableFunctionFeatures;\n"
<< "PredicateBitset getAvailableFeatures() const {\n"
<< " return AvailableModuleFeatures | AvailableFunctionFeatures;\n"
<< "}\n"
<< "PredicateBitset\n"
<< "computeAvailableModuleFeatures(const " << getTarget().getName()
<< "Subtarget *Subtarget) const;\n"
<< "PredicateBitset\n"
<< "computeAvailableFunctionFeatures(const " << getTarget().getName()
<< "Subtarget *Subtarget,\n"
<< " const MachineFunction *MF) const;\n"
<< "void setupGeneratedPerFunctionState(MachineFunction &MF) override;\n"
<< "#endif // ifdef " << IfDefName << "\n";
}
void GlobalISelMatchTableExecutorEmitter::emitPredicatesInit(
raw_ostream &OS, StringRef IfDefName) {
OS << "#ifdef " << IfDefName << "\n"
<< "AvailableModuleFeatures(computeAvailableModuleFeatures(&STI)),\n"
<< "AvailableFunctionFeatures()\n"
<< "#endif // ifdef " << IfDefName << "\n";
}
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