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() {
21 // NOTE: The sections are all allocated out of a bump pointer allocator,
22 // we don't need to free them here.
25 MCSymbol *MCContext::CreateSymbol(const StringRef &Name) {
26 assert(Name[0] != '\0' && "Normal symbols cannot be unnamed!");
28 // Create and bind the symbol, and ensure that names are unique.
29 MCSymbol *&Entry = Symbols[Name];
30 assert(!Entry && "Duplicate symbol definition!");
31 return Entry = new (*this) MCSymbol(Name, false);
34 MCSymbol *MCContext::GetOrCreateSymbol(const StringRef &Name) {
35 MCSymbol *&Entry = Symbols[Name];
36 if (Entry) return Entry;
38 return Entry = new (*this) MCSymbol(Name, false);
41 MCSymbol *MCContext::CreateTemporarySymbol(const StringRef &Name) {
42 // If unnamed, just create a symbol.
44 new (*this) MCSymbol("", true);
46 // Otherwise create as usual.
47 MCSymbol *&Entry = Symbols[Name];
48 assert(!Entry && "Duplicate symbol definition!");
49 return Entry = new (*this) MCSymbol(Name, true);
52 MCSymbol *MCContext::LookupSymbol(const StringRef &Name) const {
53 return Symbols.lookup(Name);