Merge branch 'master' into systemz
[llvm/systemz.git] / lib / MC / MCContext.cpp
blob6c6019c76ffdf19099ae60f2f8782f0e60b77187
1 //===- lib/MC/MCContext.cpp - Machine Code Context ------------------------===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
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"
15 using namespace llvm;
17 MCContext::MCContext()
21 MCContext::~MCContext() {
24 MCSection *MCContext::GetSection(const char *Name) {
25 MCSection *&Entry = Sections[Name];
27 if (!Entry)
28 Entry = new (*this) MCSection(Name);
30 return Entry;
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.
52 if (Name[0] == '\0')
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())
77 return 0;
79 return &it->second;