llvm-6502/lib/MC/MCContext.cpp
Chris Lattner 9b97a73ded Rip out the 'is temporary' nonsense from the MCContext interface to
create symbols.  It is extremely error prone and a source of a lot
of the remaining integrated assembler bugs on x86-64.

This fixes rdar://7807601.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@99902 91177308-0d34-0410-b5e6-96231b3b80d8
2010-03-30 18:10:53 +00:00

58 lines
1.9 KiB
C++

//===- 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/MCAsmInfo.h"
#include "llvm/MC/MCSection.h"
#include "llvm/MC/MCSymbol.h"
#include "llvm/ADT/SmallString.h"
#include "llvm/ADT/Twine.h"
using namespace llvm;
MCContext::MCContext(const MCAsmInfo &mai) : MAI(mai), NextUniqueID(0) {
}
MCContext::~MCContext() {
// NOTE: The sections are all allocated out of a bump pointer allocator,
// we don't need to free them here.
}
MCSymbol *MCContext::GetOrCreateSymbol(StringRef Name) {
assert(!Name.empty() && "Normal symbols cannot be unnamed!");
// Determine whether this is an assembler temporary or normal label.
bool isTemporary = Name.startswith(MAI.getPrivateGlobalPrefix());
// Do the lookup and get the entire StringMapEntry. We want access to the
// key if we are creating the entry.
StringMapEntry<MCSymbol*> &Entry = Symbols.GetOrCreateValue(Name);
if (Entry.getValue()) return Entry.getValue();
// Ok, the entry doesn't already exist. Have the MCSymbol object itself refer
// to the copy of the string that is embedded in the StringMapEntry.
MCSymbol *Result = new (*this) MCSymbol(Entry.getKey(), isTemporary);
Entry.setValue(Result);
return Result;
}
MCSymbol *MCContext::GetOrCreateSymbol(const Twine &Name) {
SmallString<128> NameSV;
Name.toVector(NameSV);
return GetOrCreateSymbol(NameSV.str());
}
MCSymbol *MCContext::CreateTempSymbol() {
return GetOrCreateSymbol(Twine(MAI.getPrivateGlobalPrefix()) +
"tmp" + Twine(NextUniqueID++));
}
MCSymbol *MCContext::LookupSymbol(StringRef Name) const {
return Symbols.lookup(Name);
}