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() {
20 MCContext::~MCContext() {
23 MCSection *MCContext::GetSection(const StringRef &Name) const {
24 StringMap<MCSection*>::const_iterator I = Sections.find(Name);
25 return I != Sections.end() ? I->second : 0;
28 MCSymbol *MCContext::CreateSymbol(const StringRef &Name) {
29 assert(Name[0] != '\0' && "Normal symbols cannot be unnamed!");
31 // Create and bind the symbol, and ensure that names are unique.
32 MCSymbol *&Entry = Symbols[Name];
33 assert(!Entry && "Duplicate symbol definition!");
34 return Entry = new (*this) MCSymbol(Name, false);
37 MCSymbol *MCContext::GetOrCreateSymbol(const StringRef &Name) {
38 MCSymbol *&Entry = Symbols[Name];
39 if (Entry) return Entry;
41 return Entry = new (*this) MCSymbol(Name, false);
45 MCSymbol *MCContext::CreateTemporarySymbol(const StringRef &Name) {
46 // If unnamed, just create a symbol.
48 new (*this) MCSymbol("", true);
50 // Otherwise create as usual.
51 MCSymbol *&Entry = Symbols[Name];
52 assert(!Entry && "Duplicate symbol definition!");
53 return Entry = new (*this) MCSymbol(Name, true);
56 MCSymbol *MCContext::LookupSymbol(const StringRef &Name) const {
57 return Symbols.lookup(Name);
60 void MCContext::ClearSymbolValue(MCSymbol *Sym) {
61 SymbolValues.erase(Sym);
64 void MCContext::SetSymbolValue(MCSymbol *Sym, const MCValue &Value) {
65 SymbolValues[Sym] = Value;
68 const MCValue *MCContext::GetSymbolValue(MCSymbol *Sym) const {
69 DenseMap<MCSymbol*, MCValue>::iterator it = SymbolValues.find(Sym);
71 if (it == SymbolValues.end())