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//===- MILexer.h - Lexer for machine instructions -------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file declares the function that lexes the machine instruction source
// string.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_LIB_CODEGEN_MIRPARSER_MILEXER_H
#define LLVM_LIB_CODEGEN_MIRPARSER_MILEXER_H
#include "llvm/ADT/APSInt.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/ADT/STLExtras.h"
#include <functional>
namespace llvm {
class Twine;
/// A token produced by the machine instruction lexer.
struct MIToken {
enum TokenKind {
// Markers
Eof,
Error,
// Tokens with no info.
comma,
equal,
underscore,
colon,
coloncolon,
exclaim,
lparen,
rparen,
plus,
minus,
// Keywords
kw_implicit,
kw_implicit_define,
kw_dead,
kw_killed,
kw_undef,
kw_early_clobber,
kw_debug_use,
kw_frame_setup,
kw_debug_location,
kw_cfi_offset,
kw_cfi_def_cfa_register,
kw_cfi_def_cfa_offset,
kw_cfi_def_cfa,
kw_blockaddress,
kw_target_index,
kw_half,
kw_float,
kw_double,
kw_x86_fp80,
kw_fp128,
kw_ppc_fp128,
kw_target_flags,
kw_volatile,
kw_non_temporal,
kw_invariant,
// Identifier tokens
Identifier,
IntegerType,
NamedRegister,
MachineBasicBlock,
StackObject,
FixedStackObject,
NamedGlobalValue,
GlobalValue,
ExternalSymbol,
// Other tokens
IntegerLiteral,
FloatingPointLiteral,
VirtualRegister,
ConstantPoolItem,
JumpTableIndex,
NamedIRBlock,
IRBlock,
NamedIRValue,
};
private:
TokenKind Kind;
unsigned StringOffset;
bool HasStringValue;
StringRef Range;
std::string StringValue;
APSInt IntVal;
public:
MIToken(TokenKind Kind, StringRef Range, unsigned StringOffset = 0)
: Kind(Kind), StringOffset(StringOffset), HasStringValue(false),
Range(Range) {}
MIToken(TokenKind Kind, StringRef Range, std::string StringValue,
unsigned StringOffset = 0)
: Kind(Kind), StringOffset(StringOffset), HasStringValue(true),
Range(Range), StringValue(std::move(StringValue)) {}
MIToken(TokenKind Kind, StringRef Range, const APSInt &IntVal,
unsigned StringOffset = 0)
: Kind(Kind), StringOffset(StringOffset), HasStringValue(false),
Range(Range), IntVal(IntVal) {}
TokenKind kind() const { return Kind; }
bool isError() const { return Kind == Error; }
bool isRegister() const {
return Kind == NamedRegister || Kind == underscore ||
Kind == VirtualRegister;
}
bool isRegisterFlag() const {
return Kind == kw_implicit || Kind == kw_implicit_define ||
Kind == kw_dead || Kind == kw_killed || Kind == kw_undef ||
Kind == kw_early_clobber || Kind == kw_debug_use;
}
bool isMemoryOperandFlag() const {
return Kind == kw_volatile || Kind == kw_non_temporal ||
Kind == kw_invariant;
}
bool is(TokenKind K) const { return Kind == K; }
bool isNot(TokenKind K) const { return Kind != K; }
StringRef::iterator location() const { return Range.begin(); }
/// Return the token's raw string value.
///
/// If the string value is quoted, this method returns that quoted string as
/// it is, without unescaping the string value.
StringRef rawStringValue() const { return Range.drop_front(StringOffset); }
/// Return the token's string value.
StringRef stringValue() const {
return HasStringValue ? StringRef(StringValue)
: Range.drop_front(StringOffset);
}
const APSInt &integerValue() const { return IntVal; }
bool hasIntegerValue() const {
return Kind == IntegerLiteral || Kind == MachineBasicBlock ||
Kind == StackObject || Kind == FixedStackObject ||
Kind == GlobalValue || Kind == VirtualRegister ||
Kind == ConstantPoolItem || Kind == JumpTableIndex ||
Kind == IRBlock;
}
};
/// Consume a single machine instruction token in the given source and return
/// the remaining source string.
StringRef lexMIToken(
StringRef Source, MIToken &Token,
function_ref<void(StringRef::iterator, const Twine &)> ErrorCallback);
} // end namespace llvm
#endif
|
