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//===- GIMatchDagPredicate - Represent a predicate to check ---------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_UTILS_TABLEGEN_GIMATCHDAGPREDICATE_H
#define LLVM_UTILS_TABLEGEN_GIMATCHDAGPREDICATE_H
#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/StringRef.h"
#if !defined(NDEBUG) || defined(LLVM_ENABLE_DUMP)
#include "llvm/Support/raw_ostream.h"
#endif
namespace llvm {
class CodeExpansions;
class CodeGenInstruction;
class GIMatchDagOperandList;
class GIMatchDagContext;
class raw_ostream;
/// Represents a predicate on the match DAG. This records the details of the
/// predicate. The dependencies are stored in the GIMatchDag as edges.
///
/// Instances of this class objects are owned by the GIMatchDag and are not
/// shareable between instances of GIMatchDag.
class GIMatchDagPredicate {
public:
enum GIMatchDagPredicateKind {
GIMatchDagPredicateKind_Opcode,
GIMatchDagPredicateKind_OneOfOpcodes,
GIMatchDagPredicateKind_SameMO,
};
protected:
const GIMatchDagPredicateKind Kind;
/// The name of the predicate. For example:
/// (FOO $a:s32, $b, $c)
/// will cause 's32' to be assigned to this member for the $a predicate.
/// Similarly, the opcode predicate will cause 'FOO' to be assigned to this
/// member. Anonymous instructions will have a name assigned for debugging
/// purposes.
StringRef Name;
/// The operand list for this predicate. This object may be shared with
/// other predicates of a similar 'shape'.
const GIMatchDagOperandList &OperandInfo;
public:
GIMatchDagPredicate(GIMatchDagPredicateKind Kind, StringRef Name,
const GIMatchDagOperandList &OperandInfo)
: Kind(Kind), Name(Name), OperandInfo(OperandInfo) {}
virtual ~GIMatchDagPredicate() {}
GIMatchDagPredicateKind getKind() const { return Kind; }
StringRef getName() const { return Name; }
const GIMatchDagOperandList &getOperandInfo() const { return OperandInfo; }
// Generate C++ code to check this predicate. If a partitioner has already
// tested this predicate then this function won't be called. If this function
// is called, it must emit code and return true to indicate that it did so. If
// it ever returns false, then the caller will abort due to an untested
// predicate.
virtual bool generateCheckCode(raw_ostream &OS, StringRef Indent,
const CodeExpansions &Expansions) const {
return false;
}
virtual void print(raw_ostream &OS) const;
virtual void printDescription(raw_ostream &OS) const;
#if !defined(NDEBUG) || defined(LLVM_ENABLE_DUMP)
virtual LLVM_DUMP_METHOD void dump() const { print(errs()); }
#endif // if !defined(NDEBUG) || defined(LLVM_ENABLE_DUMP)
};
class GIMatchDagOpcodePredicate : public GIMatchDagPredicate {
const CodeGenInstruction &Instr;
public:
GIMatchDagOpcodePredicate(GIMatchDagContext &Ctx, StringRef Name,
const CodeGenInstruction &Instr);
static bool classof(const GIMatchDagPredicate *P) {
return P->getKind() == GIMatchDagPredicateKind_Opcode;
}
const CodeGenInstruction *getInstr() const { return &Instr; }
void printDescription(raw_ostream &OS) const override;
#if !defined(NDEBUG) || defined(LLVM_ENABLE_DUMP)
LLVM_DUMP_METHOD void dump() const override { print(errs()); }
#endif // if !defined(NDEBUG) || defined(LLVM_ENABLE_DUMP)
};
class GIMatchDagOneOfOpcodesPredicate : public GIMatchDagPredicate {
SmallVector<const CodeGenInstruction *, 4> Instrs;
public:
GIMatchDagOneOfOpcodesPredicate(GIMatchDagContext &Ctx, StringRef Name);
void addOpcode(const CodeGenInstruction *Instr) { Instrs.push_back(Instr); }
static bool classof(const GIMatchDagPredicate *P) {
return P->getKind() == GIMatchDagPredicateKind_OneOfOpcodes;
}
const SmallVectorImpl<const CodeGenInstruction *> &getInstrs() const {
return Instrs;
}
void printDescription(raw_ostream &OS) const override;
#if !defined(NDEBUG) || defined(LLVM_ENABLE_DUMP)
LLVM_DUMP_METHOD void dump() const override { print(errs()); }
#endif // if !defined(NDEBUG) || defined(LLVM_ENABLE_DUMP)
};
class GIMatchDagSameMOPredicate : public GIMatchDagPredicate {
public:
GIMatchDagSameMOPredicate(GIMatchDagContext &Ctx, StringRef Name);
static bool classof(const GIMatchDagPredicate *P) {
return P->getKind() == GIMatchDagPredicateKind_SameMO;
}
void printDescription(raw_ostream &OS) const override;
#if !defined(NDEBUG) || defined(LLVM_ENABLE_DUMP)
LLVM_DUMP_METHOD void dump() const override { print(errs()); }
#endif // if !defined(NDEBUG) || defined(LLVM_ENABLE_DUMP)
};
raw_ostream &operator<<(raw_ostream &OS, const GIMatchDagPredicate &N);
raw_ostream &operator<<(raw_ostream &OS, const GIMatchDagOpcodePredicate &N);
} // end namespace llvm
#endif // ifndef LLVM_UTILS_TABLEGEN_GIMATCHDAGPREDICATE_H
|
