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//===- MIParser.h - Machine Instructions Parser -----------------*- C++ -*-===//
//
// 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
//
//===----------------------------------------------------------------------===//
//
// This file declares the function that parses the machine instructions.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_CODEGEN_MIRPARSER_MIPARSER_H
#define LLVM_CODEGEN_MIRPARSER_MIPARSER_H
#include "llvm/ADT/DenseMap.h"
#include "llvm/ADT/StringMap.h"
#include "llvm/CodeGen/MachineMemOperand.h"
#include "llvm/CodeGen/Register.h"
#include "llvm/IR/TrackingMDRef.h"
#include "llvm/Support/Allocator.h"
#include "llvm/Support/SMLoc.h"
#include <map>
#include <utility>
namespace llvm {
class MachineBasicBlock;
class MachineFunction;
class MDNode;
class RegisterBank;
struct SlotMapping;
class SMDiagnostic;
class SourceMgr;
class StringRef;
class TargetRegisterClass;
class TargetSubtargetInfo;
struct VRegInfo {
enum uint8_t {
UNKNOWN, NORMAL, GENERIC, REGBANK
} Kind = UNKNOWN;
bool Explicit = false; ///< VReg was explicitly specified in the .mir file.
union {
const TargetRegisterClass *RC;
const RegisterBank *RegBank;
} D;
Register VReg;
Register PreferredReg;
};
using Name2RegClassMap = StringMap<const TargetRegisterClass *>;
using Name2RegBankMap = StringMap<const RegisterBank *>;
struct PerTargetMIParsingState {
private:
const TargetSubtargetInfo &Subtarget;
/// Maps from instruction names to op codes.
StringMap<unsigned> Names2InstrOpCodes;
/// Maps from register names to registers.
StringMap<Register> Names2Regs;
/// Maps from register mask names to register masks.
StringMap<const uint32_t *> Names2RegMasks;
/// Maps from subregister names to subregister indices.
StringMap<unsigned> Names2SubRegIndices;
/// Maps from target index names to target indices.
StringMap<int> Names2TargetIndices;
/// Maps from direct target flag names to the direct target flag values.
StringMap<unsigned> Names2DirectTargetFlags;
/// Maps from direct target flag names to the bitmask target flag values.
StringMap<unsigned> Names2BitmaskTargetFlags;
/// Maps from MMO target flag names to MMO target flag values.
StringMap<MachineMemOperand::Flags> Names2MMOTargetFlags;
/// Maps from register class names to register classes.
Name2RegClassMap Names2RegClasses;
/// Maps from register bank names to register banks.
Name2RegBankMap Names2RegBanks;
void initNames2InstrOpCodes();
void initNames2Regs();
void initNames2RegMasks();
void initNames2SubRegIndices();
void initNames2TargetIndices();
void initNames2DirectTargetFlags();
void initNames2BitmaskTargetFlags();
void initNames2MMOTargetFlags();
void initNames2RegClasses();
void initNames2RegBanks();
public:
/// Try to convert an instruction name to an opcode. Return true if the
/// instruction name is invalid.
bool parseInstrName(StringRef InstrName, unsigned &OpCode);
/// Try to convert a register name to a register number. Return true if the
/// register name is invalid.
bool getRegisterByName(StringRef RegName, Register &Reg);
/// Check if the given identifier is a name of a register mask.
///
/// Return null if the identifier isn't a register mask.
const uint32_t *getRegMask(StringRef Identifier);
/// Check if the given identifier is a name of a subregister index.
///
/// Return 0 if the name isn't a subregister index class.
unsigned getSubRegIndex(StringRef Name);
/// Try to convert a name of target index to the corresponding target index.
///
/// Return true if the name isn't a name of a target index.
bool getTargetIndex(StringRef Name, int &Index);
/// Try to convert a name of a direct target flag to the corresponding
/// target flag.
///
/// Return true if the name isn't a name of a direct flag.
bool getDirectTargetFlag(StringRef Name, unsigned &Flag);
/// Try to convert a name of a bitmask target flag to the corresponding
/// target flag.
///
/// Return true if the name isn't a name of a bitmask target flag.
bool getBitmaskTargetFlag(StringRef Name, unsigned &Flag);
/// Try to convert a name of a MachineMemOperand target flag to the
/// corresponding target flag.
///
/// Return true if the name isn't a name of a target MMO flag.
bool getMMOTargetFlag(StringRef Name, MachineMemOperand::Flags &Flag);
/// Check if the given identifier is a name of a register class.
///
/// Return null if the name isn't a register class.
const TargetRegisterClass *getRegClass(StringRef Name);
/// Check if the given identifier is a name of a register bank.
///
/// Return null if the name isn't a register bank.
const RegisterBank *getRegBank(StringRef Name);
PerTargetMIParsingState(const TargetSubtargetInfo &STI)
: Subtarget(STI) {
initNames2RegClasses();
initNames2RegBanks();
}
~PerTargetMIParsingState() = default;
void setTarget(const TargetSubtargetInfo &NewSubtarget);
};
struct PerFunctionMIParsingState {
BumpPtrAllocator Allocator;
MachineFunction &MF;
SourceMgr *SM;
const SlotMapping &IRSlots;
PerTargetMIParsingState &Target;
std::map<unsigned, TrackingMDNodeRef> MachineMetadataNodes;
std::map<unsigned, std::pair<TempMDTuple, SMLoc>> MachineForwardRefMDNodes;
DenseMap<unsigned, MachineBasicBlock *> MBBSlots;
DenseMap<Register, VRegInfo *> VRegInfos;
StringMap<VRegInfo *> VRegInfosNamed;
DenseMap<unsigned, int> FixedStackObjectSlots;
DenseMap<unsigned, int> StackObjectSlots;
DenseMap<unsigned, unsigned> ConstantPoolSlots;
DenseMap<unsigned, unsigned> JumpTableSlots;
/// Maps from slot numbers to function's unnamed values.
DenseMap<unsigned, const Value *> Slots2Values;
PerFunctionMIParsingState(MachineFunction &MF, SourceMgr &SM,
const SlotMapping &IRSlots,
PerTargetMIParsingState &Target);
VRegInfo &getVRegInfo(Register Num);
VRegInfo &getVRegInfoNamed(StringRef RegName);
const Value *getIRValue(unsigned Slot);
};
/// Parse the machine basic block definitions, and skip the machine
/// instructions.
///
/// This function runs the first parsing pass on the machine function's body.
/// It parses only the machine basic block definitions and creates the machine
/// basic blocks in the given machine function.
///
/// The machine instructions aren't parsed during the first pass because all
/// the machine basic blocks aren't defined yet - this makes it impossible to
/// resolve the machine basic block references.
///
/// Return true if an error occurred.
bool parseMachineBasicBlockDefinitions(PerFunctionMIParsingState &PFS,
StringRef Src, SMDiagnostic &Error);
/// Parse the machine instructions.
///
/// This function runs the second parsing pass on the machine function's body.
/// It skips the machine basic block definitions and parses only the machine
/// instructions and basic block attributes like liveins and successors.
///
/// The second parsing pass assumes that the first parsing pass already ran
/// on the given source string.
///
/// Return true if an error occurred.
bool parseMachineInstructions(PerFunctionMIParsingState &PFS, StringRef Src,
SMDiagnostic &Error);
bool parseMBBReference(PerFunctionMIParsingState &PFS,
MachineBasicBlock *&MBB, StringRef Src,
SMDiagnostic &Error);
bool parseRegisterReference(PerFunctionMIParsingState &PFS,
Register &Reg, StringRef Src,
SMDiagnostic &Error);
bool parseNamedRegisterReference(PerFunctionMIParsingState &PFS, Register &Reg,
StringRef Src, SMDiagnostic &Error);
bool parseVirtualRegisterReference(PerFunctionMIParsingState &PFS,
VRegInfo *&Info, StringRef Src,
SMDiagnostic &Error);
bool parseStackObjectReference(PerFunctionMIParsingState &PFS, int &FI,
StringRef Src, SMDiagnostic &Error);
bool parseMDNode(PerFunctionMIParsingState &PFS, MDNode *&Node, StringRef Src,
SMDiagnostic &Error);
bool parseMachineMetadata(PerFunctionMIParsingState &PFS, StringRef Src,
SMRange SourceRange, SMDiagnostic &Error);
} // end namespace llvm
#endif // LLVM_CODEGEN_MIRPARSER_MIPARSER_H
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