+++ /dev/null
-//===-- Mangler.cpp - Self-contained c/asm llvm name mangler --------------===//
-//
-// The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-//
-// Unified name mangler for assembly backends.
-//
-//===----------------------------------------------------------------------===//
-
-#include "llvm/Target/Mangler.h"
-#include "llvm/ADT/SmallString.h"
-#include "llvm/ADT/Twine.h"
-#include "llvm/IR/DataLayout.h"
-#include "llvm/IR/DerivedTypes.h"
-#include "llvm/IR/Function.h"
-#include "llvm/MC/MCContext.h"
-#include "llvm/Support/raw_ostream.h"
-using namespace llvm;
-
-/// getNameWithPrefix - Fill OutName with the name of the appropriate prefix
-/// and the specified name as the global variable name. GVName must not be
-/// empty.
-void Mangler::getNameWithPrefix(SmallVectorImpl<char> &OutName,
- const Twine &GVName, ManglerPrefixTy PrefixTy) {
- SmallString<256> TmpData;
- StringRef Name = GVName.toStringRef(TmpData);
- assert(!Name.empty() && "getNameWithPrefix requires non-empty name");
-
- // If the global name is not led with \1, add the appropriate prefixes.
- if (Name[0] == '\1') {
- Name = Name.substr(1);
- } else {
- if (PrefixTy == Mangler::Private) {
- const char *Prefix = DL->getPrivateGlobalPrefix();
- OutName.append(Prefix, Prefix+strlen(Prefix));
- } else if (PrefixTy == Mangler::LinkerPrivate) {
- const char *Prefix = DL->getLinkerPrivateGlobalPrefix();
- OutName.append(Prefix, Prefix+strlen(Prefix));
- }
-
- char Prefix = DL->getGlobalPrefix();
- if (Prefix != '\0')
- OutName.push_back(Prefix);
- }
-
- // If this is a simple string that doesn't need escaping, just append it.
- OutName.append(Name.begin(), Name.end());
-}
-
-/// AddFastCallStdCallSuffix - Microsoft fastcall and stdcall functions require
-/// a suffix on their name indicating the number of words of arguments they
-/// take.
-static void AddFastCallStdCallSuffix(SmallVectorImpl<char> &OutName,
- const Function *F, const DataLayout &TD) {
- // Calculate arguments size total.
- unsigned ArgWords = 0;
- for (Function::const_arg_iterator AI = F->arg_begin(), AE = F->arg_end();
- AI != AE; ++AI) {
- Type *Ty = AI->getType();
- // 'Dereference' type in case of byval parameter attribute
- if (AI->hasByValAttr())
- Ty = cast<PointerType>(Ty)->getElementType();
- // Size should be aligned to DWORD boundary
- ArgWords += ((TD.getTypeAllocSize(Ty) + 3)/4)*4;
- }
-
- raw_svector_ostream(OutName) << '@' << ArgWords;
-}
-
-
-/// getNameWithPrefix - Fill OutName with the name of the appropriate prefix
-/// and the specified global variable's name. If the global variable doesn't
-/// have a name, this fills in a unique name for the global.
-void Mangler::getNameWithPrefix(SmallVectorImpl<char> &OutName,
- const GlobalValue *GV) {
- ManglerPrefixTy PrefixTy = Mangler::Default;
- if (GV->hasPrivateLinkage())
- PrefixTy = Mangler::Private;
- else if (GV->hasLinkerPrivateLinkage() || GV->hasLinkerPrivateWeakLinkage())
- PrefixTy = Mangler::LinkerPrivate;
-
- // If this global has a name, handle it simply.
- if (GV->hasName()) {
- StringRef Name = GV->getName();
- getNameWithPrefix(OutName, Name, PrefixTy);
- // No need to do anything else if the global has the special "do not mangle"
- // flag in the name.
- if (Name[0] == 1)
- return;
- } else {
- // Get the ID for the global, assigning a new one if we haven't got one
- // already.
- unsigned &ID = AnonGlobalIDs[GV];
- if (ID == 0) ID = NextAnonGlobalID++;
-
- // Must mangle the global into a unique ID.
- getNameWithPrefix(OutName, "__unnamed_" + Twine(ID), PrefixTy);
- }
-
- // If we are supposed to add a microsoft-style suffix for stdcall/fastcall,
- // add it.
- if (DL->hasMicrosoftFastStdCallMangling()) {
- if (const Function *F = dyn_cast<Function>(GV)) {
- CallingConv::ID CC = F->getCallingConv();
-
- // fastcall functions need to start with @.
- // FIXME: This logic seems unlikely to be right.
- if (CC == CallingConv::X86_FastCall) {
- if (OutName[0] == '_')
- OutName[0] = '@';
- else
- OutName.insert(OutName.begin(), '@');
- }
-
- // fastcall and stdcall functions usually need @42 at the end to specify
- // the argument info.
- FunctionType *FT = F->getFunctionType();
- if ((CC == CallingConv::X86_FastCall || CC == CallingConv::X86_StdCall) &&
- // "Pure" variadic functions do not receive @0 suffix.
- (!FT->isVarArg() || FT->getNumParams() == 0 ||
- (FT->getNumParams() == 1 && F->hasStructRetAttr())))
- AddFastCallStdCallSuffix(OutName, F, *DL);
- }
- }
-}