blob: 6a906f69ccc619a8f7dbe6db4a7c07548c7cc75d (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
|
#pragma once
#ifdef __GNUC__
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wunused-parameter"
#endif
//===-- llvm/MC/MCValue.h - MCValue class -----------------------*- 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 contains the declaration of the MCValue class.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_MC_MCVALUE_H
#define LLVM_MC_MCVALUE_H
#include "llvm/MC/MCExpr.h"
#include "llvm/Support/DataTypes.h"
#include <cassert>
namespace llvm {
class raw_ostream;
/// This represents an "assembler immediate".
///
/// In its most general form, this can hold ":Kind:(SymbolA - SymbolB +
/// imm64)". Not all targets supports relocations of this general form, but we
/// need to represent this anyway.
///
/// In general both SymbolA and SymbolB will also have a modifier
/// analogous to the top-level Kind. Current targets are not expected
/// to make use of both though. The choice comes down to whether
/// relocation modifiers apply to the closest symbol or the whole
/// expression.
///
/// Note that this class must remain a simple POD value class, because we need
/// it to live in unions etc.
class MCValue {
const MCSymbolRefExpr *SymA = nullptr, *SymB = nullptr;
int64_t Cst = 0;
uint32_t RefKind = 0;
public:
MCValue() = default;
int64_t getConstant() const { return Cst; }
const MCSymbolRefExpr *getSymA() const { return SymA; }
const MCSymbolRefExpr *getSymB() const { return SymB; }
uint32_t getRefKind() const { return RefKind; }
/// Is this an absolute (as opposed to relocatable) value.
bool isAbsolute() const { return !SymA && !SymB; }
/// Print the value to the stream \p OS.
void print(raw_ostream &OS) const;
/// Print the value to stderr.
void dump() const;
MCSymbolRefExpr::VariantKind getAccessVariant() const;
static MCValue get(const MCSymbolRefExpr *SymA,
const MCSymbolRefExpr *SymB = nullptr,
int64_t Val = 0, uint32_t RefKind = 0) {
MCValue R;
R.Cst = Val;
R.SymA = SymA;
R.SymB = SymB;
R.RefKind = RefKind;
return R;
}
static MCValue get(int64_t Val) {
MCValue R;
R.Cst = Val;
R.SymA = nullptr;
R.SymB = nullptr;
R.RefKind = 0;
return R;
}
};
} // end namespace llvm
#endif
#ifdef __GNUC__
#pragma GCC diagnostic pop
#endif
|
