//===----------------------------------------------------------------------===//
#include "llvm/Target/Mangler.h"
-#include "llvm/GlobalValue.h"
-#include "llvm/MC/MCAsmInfo.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;
-static bool isAcceptableChar(char C) {
- if ((C < 'a' || C > 'z') &&
- (C < 'A' || C > 'Z') &&
- (C < '0' || C > '9') &&
- C != '_' && C != '$' && C != '.' && C != '@')
- return false;
- return true;
-}
-
-static char HexDigit(int V) {
- return V < 10 ? V+'0' : V+'A'-10;
-}
-
-static void MangleLetter(SmallVectorImpl<char> &OutName, unsigned char C) {
- OutName.push_back('_');
- OutName.push_back(HexDigit(C >> 4));
- OutName.push_back(HexDigit(C & 15));
- OutName.push_back('_');
-}
-
-/// NameNeedsEscaping - Return true if the identifier \arg Str needs quotes
-/// for this assembler.
-static bool NameNeedsEscaping(StringRef Str, const MCAsmInfo &MAI) {
- assert(!Str.empty() && "Cannot create an empty MCSymbol");
-
- // If the first character is a number and the target does not allow this, we
- // need quotes.
- if (!MAI.doesAllowNameToStartWithDigit() && Str[0] >= '0' && Str[0] <= '9')
- return true;
-
- // If any of the characters in the string is an unacceptable character, force
- // quotes.
- for (unsigned i = 0, e = Str.size(); i != e; ++i)
- if (!isAcceptableChar(Str[i]))
- return true;
- return false;
-}
-
-/// appendMangledName - Add the specified string in mangled form if it uses
-/// any unusual characters.
-void Mangler::appendMangledName(SmallVectorImpl<char> &OutName, StringRef Str,
- 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') {
- MangleLetter(OutName, Str[0]);
- Str = Str.substr(1);
- }
-
- for (unsigned i = 0, e = Str.size(); i != e; ++i) {
- if (!isAcceptableChar(Str[i]))
- MangleLetter(OutName, Str[i]);
- else
- OutName.push_back(Str[i]);
- }
-}
-
-
-/// appendMangledQuotedName - On systems that support quoted symbols, we still
-/// have to escape some (obscure) characters like " and \n which would break the
-/// assembler's lexing.
-static void appendMangledQuotedName(SmallVectorImpl<char> &OutName,
- StringRef Str) {
- for (unsigned i = 0, e = Str.size(); i != e; ++i) {
- if (Str[i] == '"' || Str[i] == '\n')
- MangleLetter(OutName, Str[i]);
- else
- OutName.push_back(Str[i]);
- }
-}
-
-
/// getNameWithPrefix - Fill OutName with the name of the appropriate prefix
/// and the specified name as the global variable name. GVName must not be
/// empty.
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 = MAI.getPrivateGlobalPrefix();
+ const char *Prefix = DL->getPrivateGlobalPrefix();
OutName.append(Prefix, Prefix+strlen(Prefix));
} else if (PrefixTy == Mangler::LinkerPrivate) {
- const char *Prefix = MAI.getLinkerPrivateGlobalPrefix();
+ const char *Prefix = DL->getLinkerPrivateGlobalPrefix();
OutName.append(Prefix, Prefix+strlen(Prefix));
}
- const char *Prefix = MAI.getGlobalPrefix();
- if (Prefix[0] == 0)
- ; // Common noop, no prefix.
- else if (Prefix[1] == 0)
- OutName.push_back(Prefix[0]); // Common, one character prefix.
- else
- OutName.append(Prefix, Prefix+strlen(Prefix)); // Arbitrary length 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.
- if (!NameNeedsEscaping(Name, MAI) ||
- // If quotes are supported, they can be used unless the string contains
- // a quote or newline.
- (MAI.doesAllowQuotesInName() &&
- Name.find_first_of("\n\"") == StringRef::npos)) {
- OutName.append(Name.begin(), Name.end());
- return;
+ 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;
}
- // On systems that do not allow quoted names, we need to mangle most
- // strange characters.
- if (!MAI.doesAllowQuotesInName())
- 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.
- assert(Name.find_first_of("\n\"") != StringRef::npos);
- return appendMangledQuotedName(OutName, Name);
+ raw_svector_ostream(OutName) << '@' << ArgWords;
}
/// 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,
- bool isImplicitlyPrivate) {
+ const GlobalValue *GV) {
ManglerPrefixTy PrefixTy = Mangler::Default;
- if (GV->hasPrivateLinkage() || isImplicitlyPrivate)
+ if (GV->hasPrivateLinkage())
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);
-
- // 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++;
+ 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);
-}
+ // Must mangle the global into a unique ID.
+ getNameWithPrefix(OutName, "__unnamed_" + Twine(ID), PrefixTy);
+ }
-/// 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());
+ // 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);
+ }
+ }
}
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