//===----------------------------------------------------------------------===//
#include "llvm/Target/Mangler.h"
-#include "llvm/GlobalValue.h"
+#include "llvm/DerivedTypes.h"
+#include "llvm/Function.h"
+#include "llvm/Target/TargetData.h"
#include "llvm/MC/MCAsmInfo.h"
+#include "llvm/MC/MCContext.h"
+#include "llvm/Support/raw_ostream.h"
#include "llvm/ADT/SmallString.h"
#include "llvm/ADT/Twine.h"
using namespace llvm;
-static bool isAcceptableChar(char C) {
+static bool isAcceptableChar(char C, bool AllowPeriod, bool AllowUTF8) {
if ((C < 'a' || C > 'z') &&
(C < 'A' || C > 'Z') &&
(C < '0' || C > '9') &&
- C != '_' && C != '$' && C != '.' && C != '@')
+ C != '_' && C != '$' && C != '@' &&
+ !(AllowPeriod && C == '.') &&
+ !(AllowUTF8 && (C & 0x80)))
return false;
return true;
}
OutName.push_back('_');
}
-/// NameNeedsEscaping - Return true if the identifier \arg Str needs quotes
+/// NameNeedsEscaping - Return true if the identifier \p Str needs quotes
/// for this assembler.
static bool NameNeedsEscaping(StringRef Str, const MCAsmInfo &MAI) {
assert(!Str.empty() && "Cannot create an empty MCSymbol");
// If any of the characters in the string is an unacceptable character, force
// quotes.
+ bool AllowPeriod = MAI.doesAllowPeriodsInName();
+ bool AllowUTF8 = MAI.doesAllowUTF8();
for (unsigned i = 0, e = Str.size(); i != e; ++i)
- if (!isAcceptableChar(Str[i]))
+ if (!isAcceptableChar(Str[i], AllowPeriod, AllowUTF8))
return true;
return false;
}
/// appendMangledName - Add the specified string in mangled form if it uses
/// any unusual characters.
static void appendMangledName(SmallVectorImpl<char> &OutName, StringRef Str,
- const MCAsmInfo *MAI) {
+ const MCAsmInfo &MAI) {
// The first character is not allowed to be a number unless the target
// explicitly allows it.
- if ((MAI == 0 || !MAI->doesAllowNameToStartWithDigit()) &&
- Str[0] >= '0' && Str[0] <= '9') {
+ if (!MAI.doesAllowNameToStartWithDigit() && Str[0] >= '0' && Str[0] <= '9') {
MangleLetter(OutName, Str[0]);
Str = Str.substr(1);
}
-
+
+ bool AllowPeriod = MAI.doesAllowPeriodsInName();
+ bool AllowUTF8 = MAI.doesAllowUTF8();
for (unsigned i = 0, e = Str.size(); i != e; ++i) {
- if (!isAcceptableChar(Str[i]))
+ if (!isAcceptableChar(Str[i], AllowPeriod, AllowUTF8))
MangleLetter(OutName, Str[i]);
else
OutName.push_back(Str[i]);
StringRef Name = GVName.toStringRef(TmpData);
assert(!Name.empty() && "getNameWithPrefix requires non-empty name");
+ const MCAsmInfo &MAI = Context.getAsmInfo();
+
// If the global name is not led with \1, add the appropriate prefixes.
if (Name[0] == '\1') {
Name = Name.substr(1);
// On systems that do not allow quoted names, we need to mangle most
// strange characters.
if (!MAI.doesAllowQuotesInName())
- return appendMangledName(OutName, Name, &MAI);
+ return appendMangledName(OutName, Name, MAI);
// Okay, the system allows quoted strings. We can quote most anything, the
// only characters that need escaping are " and \n.
return appendMangledQuotedName(OutName, Name);
}
+/// 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 TargetData &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
ManglerPrefixTy PrefixTy = Mangler::Default;
if (GV->hasPrivateLinkage() || isImplicitlyPrivate)
PrefixTy = Mangler::Private;
- else if (GV->hasLinkerPrivateLinkage())
+ else if (GV->hasLinkerPrivateLinkage() || GV->hasLinkerPrivateWeakLinkage())
PrefixTy = Mangler::LinkerPrivate;
// If this global has a name, handle it simply.
- if (GV->hasName())
- return getNameWithPrefix(OutName, GV->getName(), PrefixTy);
+ if (GV->hasName()) {
+ getNameWithPrefix(OutName, GV->getName(), PrefixTy);
+ } 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++;
- // 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);
+ }
- // 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 (Context.getAsmInfo().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, TD);
+ }
+ }
}
-/// 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.
-std::string Mangler::getNameWithPrefix(const GlobalValue *GV,
- bool isImplicitlyPrivate) {
- SmallString<64> Buf;
- getNameWithPrefix(Buf, GV, isImplicitlyPrivate);
- return std::string(Buf.begin(), Buf.end());
+/// getSymbol - Return the MCSymbol for the specified global value. This
+/// symbol is the main label that is the address of the global.
+MCSymbol *Mangler::getSymbol(const GlobalValue *GV) {
+ SmallString<60> NameStr;
+ getNameWithPrefix(NameStr, GV, false);
+ return Context.GetOrCreateSymbol(NameStr.str());
}
+
+
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