2011-07-08 19:36:35 +02:00
|
|
|
//===- PseudoLoweringEmitter.h - PseudoLowering Generator -------*- C++ -*-===//
|
|
|
|
//
|
|
|
|
// The LLVM Compiler Infrastructure
|
|
|
|
//
|
|
|
|
// This file is distributed under the University of Illinois Open Source
|
|
|
|
// License. See LICENSE.TXT for details.
|
|
|
|
//
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
|
|
|
|
#ifndef PSEUDOLOWERINGEMITTER_H
|
|
|
|
#define PSEUDOLOWERINGEMITTER_H
|
|
|
|
|
|
|
|
#include "CodeGenInstruction.h"
|
|
|
|
#include "CodeGenTarget.h"
|
2011-10-01 18:41:13 +02:00
|
|
|
#include "llvm/TableGen/TableGenBackend.h"
|
2011-07-08 19:36:35 +02:00
|
|
|
#include "llvm/ADT/IndexedMap.h"
|
|
|
|
#include "llvm/ADT/SmallVector.h"
|
|
|
|
|
|
|
|
namespace llvm {
|
|
|
|
|
|
|
|
class PseudoLoweringEmitter : public TableGenBackend {
|
|
|
|
struct OpData {
|
|
|
|
enum MapKind { Operand, Imm, Reg };
|
|
|
|
MapKind Kind;
|
|
|
|
union {
|
|
|
|
unsigned Operand; // Operand number mapped to.
|
|
|
|
uint64_t Imm; // Integer immedate value.
|
|
|
|
Record *Reg; // Physical register.
|
|
|
|
} Data;
|
|
|
|
};
|
|
|
|
struct PseudoExpansion {
|
|
|
|
CodeGenInstruction Source; // The source pseudo instruction definition.
|
|
|
|
CodeGenInstruction Dest; // The destination instruction to lower to.
|
|
|
|
IndexedMap<OpData> OperandMap;
|
|
|
|
|
|
|
|
PseudoExpansion(CodeGenInstruction &s, CodeGenInstruction &d,
|
|
|
|
IndexedMap<OpData> &m) :
|
|
|
|
Source(s), Dest(d), OperandMap(m) {}
|
|
|
|
};
|
|
|
|
|
|
|
|
RecordKeeper &Records;
|
|
|
|
|
|
|
|
// It's overkill to have an instance of the full CodeGenTarget object,
|
|
|
|
// but it loads everything on demand, not in the constructor, so it's
|
|
|
|
// lightweight in performance, so it works out OK.
|
|
|
|
CodeGenTarget Target;
|
|
|
|
|
|
|
|
SmallVector<PseudoExpansion, 64> Expansions;
|
|
|
|
|
2011-07-30 00:43:06 +02:00
|
|
|
unsigned addDagOperandMapping(Record *Rec, DagInit *Dag,
|
2011-07-08 19:36:35 +02:00
|
|
|
CodeGenInstruction &Insn,
|
|
|
|
IndexedMap<OpData> &OperandMap,
|
|
|
|
unsigned BaseIdx);
|
|
|
|
void evaluateExpansion(Record *Pseudo);
|
|
|
|
void emitLoweringEmitter(raw_ostream &o);
|
|
|
|
public:
|
|
|
|
PseudoLoweringEmitter(RecordKeeper &R) : Records(R), Target(R) {}
|
|
|
|
|
|
|
|
/// run - Output the pseudo-lowerings.
|
|
|
|
void run(raw_ostream &o);
|
|
|
|
};
|
|
|
|
|
|
|
|
} // end llvm namespace
|
|
|
|
|
|
|
|
#endif
|