llvm-6502/lib/MC/MCContext.cpp

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//===- lib/MC/MCContext.cpp - Machine Code Context ------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "llvm/MC/MCContext.h"
#include "llvm/MC/MCSection.h"
#include "llvm/MC/MCSymbol.h"
#include "llvm/MC/MCValue.h"
#include "llvm/ADT/SmallString.h"
#include "llvm/ADT/Twine.h"
using namespace llvm;
MCContext::MCContext() {
}
MCContext::~MCContext() {
// NOTE: The sections are all allocated out of a bump pointer allocator,
// we don't need to free them here.
}
MCSymbol *MCContext::CreateSymbol(StringRef Name) {
assert(Name[0] != '\0' && "Normal symbols cannot be unnamed!");
// Create and bind the symbol, and ensure that names are unique.
MCSymbol *&Entry = Symbols[Name];
assert(!Entry && "Duplicate symbol definition!");
return Entry = new (*this) MCSymbol(Name, false);
}
MCSymbol *MCContext::GetOrCreateSymbol(StringRef Name) {
MCSymbol *&Entry = Symbols[Name];
if (Entry) return Entry;
return Entry = new (*this) MCSymbol(Name, false);
}
MCSymbol *MCContext::GetOrCreateSymbol(const Twine &Name) {
SmallString<128> NameSV;
Name.toVector(NameSV);
return GetOrCreateSymbol(NameSV.str());
}
MCSymbol *MCContext::CreateTemporarySymbol(StringRef Name) {
// If unnamed, just create a symbol.
if (Name.empty())
new (*this) MCSymbol("", true);
// Otherwise create as usual.
MCSymbol *&Entry = Symbols[Name];
assert(!Entry && "Duplicate symbol definition!");
return Entry = new (*this) MCSymbol(Name, true);
}
MCSymbol *MCContext::LookupSymbol(StringRef Name) const {
return Symbols.lookup(Name);
}