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"
11 #include "llvm/MC/MCSection.h"
12 #include "llvm/MC/MCSymbol.h"
13 #include "llvm/MC/MCValue.h"
14 #include "llvm/ADT/SmallString.h"
15 #include "llvm/ADT/Twine.h"
18 MCContext::MCContext() {
21 MCContext::~MCContext() {
22 // NOTE: The sections are all allocated out of a bump pointer allocator,
23 // we don't need to free them here.
26 MCSymbol *MCContext::CreateSymbol(StringRef Name) {
27 assert(Name[0] != '\0' && "Normal symbols cannot be unnamed!");
29 // Create and bind the symbol, and ensure that names are unique.
30 MCSymbol *&Entry = Symbols[Name];
31 assert(!Entry && "Duplicate symbol definition!");
32 return Entry = new (*this) MCSymbol(Name, false);
35 MCSymbol *MCContext::GetOrCreateSymbol(StringRef Name) {
36 MCSymbol *&Entry = Symbols[Name];
37 if (Entry) return Entry;
39 return Entry = new (*this) MCSymbol(Name, false);
42 MCSymbol *MCContext::GetOrCreateSymbol(const Twine &Name) {
43 SmallString<128> NameSV;
44 Name.toVector(NameSV);
45 return GetOrCreateSymbol(NameSV.str());
49 MCSymbol *MCContext::CreateTemporarySymbol(StringRef Name) {
50 // If unnamed, just create a symbol.
52 new (*this) MCSymbol("", true);
54 // Otherwise create as usual.
55 MCSymbol *&Entry = Symbols[Name];
56 assert(!Entry && "Duplicate symbol definition!");
57 return Entry = new (*this) MCSymbol(Name, true);
60 MCSymbol *MCContext::LookupSymbol(StringRef Name) const {
61 return Symbols.lookup(Name);