Constraint.cpp
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//===- Constraint.cpp - Constraint class ----------------------------------===//
//
// Part of the MLIR 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
//
//===----------------------------------------------------------------------===//
//
// Constraint wrapper to simplify using TableGen Record for constraints.
//
//===----------------------------------------------------------------------===//
#include "mlir/TableGen/Constraint.h"
#include "llvm/TableGen/Record.h"
using namespace mlir::tblgen;
Constraint::Constraint(const llvm::Record *record)
: def(record), kind(CK_Uncategorized) {
if (record->isSubClassOf("TypeConstraint")) {
kind = CK_Type;
} else if (record->isSubClassOf("AttrConstraint")) {
kind = CK_Attr;
} else if (record->isSubClassOf("RegionConstraint")) {
kind = CK_Region;
} else {
assert(record->isSubClassOf("Constraint"));
}
}
Constraint::Constraint(Kind kind, const llvm::Record *record)
: def(record), kind(kind) {}
Pred Constraint::getPredicate() const {
auto *val = def->getValue("predicate");
// If no predicate is specified, then return the null predicate (which
// corresponds to true).
if (!val)
return Pred();
const auto *pred = dyn_cast<llvm::DefInit>(val->getValue());
return Pred(pred);
}
std::string Constraint::getConditionTemplate() const {
return getPredicate().getCondition();
}
llvm::StringRef Constraint::getDescription() const {
auto doc = def->getValueAsString("description");
if (doc.empty())
return def->getName();
return doc;
}
AppliedConstraint::AppliedConstraint(Constraint &&constraint,
llvm::StringRef self,
std::vector<std::string> &&entities)
: constraint(constraint), self(self), entities(std::move(entities)) {}