6024e5c395
clang 20.0.0 (based on r547379) from build 12806354. Bug: http://b/379133546 Test: N/A Change-Id: I2eb8938af55d809de674be63cb30cf27e801862b Upstream-Commit: ad834e67b1105d15ef907f6255d4c96e8e733f57
126 lines
4.2 KiB
C++
126 lines
4.2 KiB
C++
//===- BitCodes.h - Enum values for the bitstream format --------*- 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 header defines bitstream enum values.
|
|
//
|
|
// The enum values defined in this file should be considered permanent. If
|
|
// new features are added, they should have values added at the end of the
|
|
// respective lists.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef LLVM_BITSTREAM_BITCODES_H
|
|
#define LLVM_BITSTREAM_BITCODES_H
|
|
|
|
#include "llvm/ADT/SmallVector.h"
|
|
#include "llvm/ADT/StringExtras.h"
|
|
#include "llvm/Bitstream/BitCodeEnums.h"
|
|
#include "llvm/Support/DataTypes.h"
|
|
#include "llvm/Support/ErrorHandling.h"
|
|
#include <cassert>
|
|
|
|
namespace llvm {
|
|
/// BitCodeAbbrevOp - This describes one or more operands in an abbreviation.
|
|
/// This is actually a union of two different things:
|
|
/// 1. It could be a literal integer value ("the operand is always 17").
|
|
/// 2. It could be an encoding specification ("this operand encoded like so").
|
|
///
|
|
class BitCodeAbbrevOp {
|
|
uint64_t Val; // A literal value or data for an encoding.
|
|
bool IsLiteral : 1; // Indicate whether this is a literal value or not.
|
|
unsigned Enc : 3; // The encoding to use.
|
|
public:
|
|
enum Encoding {
|
|
Fixed = 1, // A fixed width field, Val specifies number of bits.
|
|
VBR = 2, // A VBR field where Val specifies the width of each chunk.
|
|
Array = 3, // A sequence of fields, next field species elt encoding.
|
|
Char6 = 4, // A 6-bit fixed field which maps to [a-zA-Z0-9._].
|
|
Blob = 5 // 32-bit aligned array of 8-bit characters.
|
|
};
|
|
|
|
static bool isValidEncoding(uint64_t E) {
|
|
return E >= 1 && E <= 5;
|
|
}
|
|
|
|
explicit BitCodeAbbrevOp(uint64_t V) : Val(V), IsLiteral(true) {}
|
|
explicit BitCodeAbbrevOp(Encoding E, uint64_t Data = 0)
|
|
: Val(Data), IsLiteral(false), Enc(E) {}
|
|
|
|
bool isLiteral() const { return IsLiteral; }
|
|
bool isEncoding() const { return !IsLiteral; }
|
|
|
|
// Accessors for literals.
|
|
uint64_t getLiteralValue() const { assert(isLiteral()); return Val; }
|
|
|
|
// Accessors for encoding info.
|
|
Encoding getEncoding() const { assert(isEncoding()); return (Encoding)Enc; }
|
|
uint64_t getEncodingData() const {
|
|
assert(isEncoding() && hasEncodingData());
|
|
return Val;
|
|
}
|
|
|
|
bool hasEncodingData() const { return hasEncodingData(getEncoding()); }
|
|
static bool hasEncodingData(Encoding E) {
|
|
switch (E) {
|
|
case Fixed:
|
|
case VBR:
|
|
return true;
|
|
case Array:
|
|
case Char6:
|
|
case Blob:
|
|
return false;
|
|
}
|
|
report_fatal_error("Invalid encoding");
|
|
}
|
|
|
|
/// isChar6 - Return true if this character is legal in the Char6 encoding.
|
|
static bool isChar6(char C) { return isAlnum(C) || C == '.' || C == '_'; }
|
|
static unsigned EncodeChar6(char C) {
|
|
if (C >= 'a' && C <= 'z') return C-'a';
|
|
if (C >= 'A' && C <= 'Z') return C-'A'+26;
|
|
if (C >= '0' && C <= '9') return C-'0'+26+26;
|
|
if (C == '.') return 62;
|
|
if (C == '_') return 63;
|
|
llvm_unreachable("Not a value Char6 character!");
|
|
}
|
|
|
|
static char DecodeChar6(unsigned V) {
|
|
assert((V & ~63) == 0 && "Not a Char6 encoded character!");
|
|
return "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789._"
|
|
[V];
|
|
}
|
|
|
|
};
|
|
|
|
/// BitCodeAbbrev - This class represents an abbreviation record. An
|
|
/// abbreviation allows a complex record that has redundancy to be stored in a
|
|
/// specialized format instead of the fully-general, fully-vbr, format.
|
|
class BitCodeAbbrev {
|
|
SmallVector<BitCodeAbbrevOp, 32> OperandList;
|
|
|
|
public:
|
|
BitCodeAbbrev() = default;
|
|
|
|
explicit BitCodeAbbrev(std::initializer_list<BitCodeAbbrevOp> OperandList)
|
|
: OperandList(OperandList) {}
|
|
|
|
unsigned getNumOperandInfos() const {
|
|
return static_cast<unsigned>(OperandList.size());
|
|
}
|
|
const BitCodeAbbrevOp &getOperandInfo(unsigned N) const {
|
|
return OperandList[N];
|
|
}
|
|
|
|
void Add(const BitCodeAbbrevOp &OpInfo) {
|
|
OperandList.push_back(OpInfo);
|
|
}
|
|
};
|
|
} // namespace llvm
|
|
|
|
#endif
|