mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-09-01 04:29:57 +00:00
getSymbolWithGlobalValueBase use is to create a name of a new symbol based on the name of an existing GV. Assert that and then remove the last call to pass true to isImplicitlyPrivate. This gives the mangler API a 1:1 mapping from GV to names, which is what we need to drop the mangler dependency on the target (and use an extended datalayout instead). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@196472 91177308-0d34-0410-b5e6-96231b3b80d8
135 lines
4.9 KiB
C++
135 lines
4.9 KiB
C++
//===-- 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/MCAsmInfo.h"
|
|
#include "llvm/MC/MCContext.h"
|
|
#include "llvm/Target/TargetMachine.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");
|
|
|
|
const MCAsmInfo *MAI = TM->getMCAsmInfo();
|
|
|
|
// 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 = MAI->getPrivateGlobalPrefix();
|
|
OutName.append(Prefix, Prefix+strlen(Prefix));
|
|
} else if (PrefixTy == Mangler::LinkerPrivate) {
|
|
const char *Prefix = MAI->getLinkerPrivateGlobalPrefix();
|
|
OutName.append(Prefix, Prefix+strlen(Prefix));
|
|
}
|
|
|
|
|
|
char Prefix = MAI->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 (TM->getMCAsmInfo()->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, *TM->getDataLayout());
|
|
}
|
|
}
|
|
}
|