1 //===- lib/MC/MCContext.cpp - Machine Code Context ------------------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 #include "llvm/MC/MCContext.h"
12 #include "llvm/MC/MCSection.h"
13 #include "llvm/MC/MCSymbol.h"
14 #include "llvm/MC/MCValue.h"
17 MCContext::MCContext()
21 MCContext::~MCContext() {
24 MCSection
*MCContext::GetSection(const char *Name
) {
25 MCSection
*&Entry
= Sections
[Name
];
28 Entry
= new (*this) MCSection(Name
);
33 MCSymbol
*MCContext::CreateSymbol(const char *Name
) {
34 assert(Name
[0] != '\0' && "Normal symbols cannot be unnamed!");
36 // Create and bind the symbol, and ensure that names are unique.
37 MCSymbol
*&Entry
= Symbols
[Name
];
38 assert(!Entry
&& "Duplicate symbol definition!");
39 return Entry
= new (*this) MCSymbol(Name
, false);
42 MCSymbol
*MCContext::GetOrCreateSymbol(const char *Name
) {
43 MCSymbol
*&Entry
= Symbols
[Name
];
44 if (Entry
) return Entry
;
46 return Entry
= new (*this) MCSymbol(Name
, false);
50 MCSymbol
*MCContext::CreateTemporarySymbol(const char *Name
) {
51 // If unnamed, just create a symbol.
53 new (*this) MCSymbol("", true);
55 // Otherwise create as usual.
56 MCSymbol
*&Entry
= Symbols
[Name
];
57 assert(!Entry
&& "Duplicate symbol definition!");
58 return Entry
= new (*this) MCSymbol(Name
, true);
61 MCSymbol
*MCContext::LookupSymbol(const char *Name
) const {
62 return Symbols
.lookup(Name
);
65 void MCContext::ClearSymbolValue(MCSymbol
*Sym
) {
66 SymbolValues
.erase(Sym
);
69 void MCContext::SetSymbolValue(MCSymbol
*Sym
, const MCValue
&Value
) {
70 SymbolValues
[Sym
] = Value
;
73 const MCValue
*MCContext::GetSymbolValue(MCSymbol
*Sym
) const {
74 DenseMap
<MCSymbol
*, MCValue
>::iterator it
= SymbolValues
.find(Sym
);
76 if (it
== SymbolValues
.end())