#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) {
+static void getNameWithPrefixx(raw_ostream &OS, const Twine &GVName,
+ Mangler::ManglerPrefixTy PrefixTy,
+ const DataLayout &DL, char Prefix) {
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.
+ // No need to do anything special if the global has the special "do not
+ // mangle" flag in the name.
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);
+ OS << Name.substr(1);
+ return;
}
+ if (PrefixTy == Mangler::Private)
+ OS << DL.getPrivateGlobalPrefix();
+ else if (PrefixTy == Mangler::LinkerPrivate)
+ OS << DL.getLinkerPrivateGlobalPrefix();
+
+ if (Prefix != '\0')
+ OS << Prefix;
+
// If this is a simple string that doesn't need escaping, just append it.
- OutName.append(Name.begin(), Name.end());
+ OS << Name;
+}
+
+void Mangler::getNameWithPrefix(raw_ostream &OS, const Twine &GVName,
+ ManglerPrefixTy PrefixTy) const {
+ char Prefix = DL->getGlobalPrefix();
+ return getNameWithPrefixx(OS, GVName, PrefixTy, *DL, Prefix);
+}
+
+void Mangler::getNameWithPrefix(SmallVectorImpl<char> &OutName,
+ const Twine &GVName,
+ ManglerPrefixTy PrefixTy) const {
+ raw_svector_ostream OS(OutName);
+ return getNameWithPrefix(OS, GVName, PrefixTy);
+}
+
+static bool hasByteCountSuffix(CallingConv::ID CC) {
+ switch (CC) {
+ case CallingConv::X86_FastCall:
+ case CallingConv::X86_StdCall:
+ case CallingConv::X86_VectorCall:
+ return true;
+ default:
+ return false;
+ }
}
-/// 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) {
+/// Microsoft fastcall and stdcall functions require a suffix on their name
+/// indicating the number of words of arguments they take.
+static void addByteCountSuffix(raw_ostream &OS, 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())
+ // 'Dereference' type in case of byval or inalloca parameter attribute.
+ if (AI->hasByValOrInAllocaAttr())
Ty = cast<PointerType>(Ty)->getElementType();
- // Size should be aligned to DWORD boundary
- ArgWords += ((TD.getTypeAllocSize(Ty) + 3)/4)*4;
+ // Size should be aligned to pointer size.
+ unsigned PtrSize = TD.getPointerSize();
+ ArgWords += RoundUpToAlignment(TD.getTypeAllocSize(Ty), PtrSize);
}
-
- raw_svector_ostream(OutName) << '@' << ArgWords;
-}
+ OS << '@' << 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) {
+void Mangler::getNameWithPrefix(raw_ostream &OS, const GlobalValue *GV,
+ bool CannotUsePrivateLabel) const {
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 {
+ if (GV->hasPrivateLinkage()) {
+ if (CannotUsePrivateLabel)
+ PrefixTy = Mangler::LinkerPrivate;
+ else
+ PrefixTy = Mangler::Private;
+ }
+
+ if (!GV->hasName()) {
// 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 (ID == 0)
+ ID = NextAnonGlobalID++;
+
// Must mangle the global into a unique ID.
- getNameWithPrefix(OutName, "__unnamed_" + Twine(ID), PrefixTy);
+ getNameWithPrefix(OS, "__unnamed_" + Twine(ID), PrefixTy);
+ return;
}
- // 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);
- }
+ StringRef Name = GV->getName();
+ char Prefix = DL->getGlobalPrefix();
+
+ // Mangle functions with Microsoft calling conventions specially. Only do
+ // this mangling for x86_64 vectorcall and 32-bit x86.
+ const Function *MSFunc = dyn_cast<Function>(GV);
+ if (Name.startswith("\01"))
+ MSFunc = nullptr; // Don't mangle when \01 is present.
+ CallingConv::ID CC =
+ MSFunc ? MSFunc->getCallingConv() : (unsigned)CallingConv::C;
+ if (!DL->hasMicrosoftFastStdCallMangling() &&
+ CC != CallingConv::X86_VectorCall)
+ MSFunc = nullptr;
+ if (MSFunc) {
+ if (CC == CallingConv::X86_FastCall)
+ Prefix = '@'; // fastcall functions have an @ prefix instead of _.
+ else if (CC == CallingConv::X86_VectorCall)
+ Prefix = '\0'; // vectorcall functions have no prefix.
}
+
+ getNameWithPrefixx(OS, Name, PrefixTy, *DL, Prefix);
+
+ if (!MSFunc)
+ return;
+
+ // If we are supposed to add a microsoft-style suffix for stdcall, fastcall,
+ // or vectorcall, add it. These functions have a suffix of @N where N is the
+ // cumulative byte size of all of the parameters to the function in decimal.
+ if (CC == CallingConv::X86_VectorCall)
+ OS << '@'; // vectorcall functions use a double @ suffix.
+ FunctionType *FT = MSFunc->getFunctionType();
+ if (hasByteCountSuffix(CC) &&
+ // "Pure" variadic functions do not receive @0 suffix.
+ (!FT->isVarArg() || FT->getNumParams() == 0 ||
+ (FT->getNumParams() == 1 && MSFunc->hasStructRetAttr())))
+ addByteCountSuffix(OS, MSFunc, *DL);
+}
+
+void Mangler::getNameWithPrefix(SmallVectorImpl<char> &OutName,
+ const GlobalValue *GV,
+ bool CannotUsePrivateLabel) const {
+ raw_svector_ostream OS(OutName);
+ getNameWithPrefix(OS, GV, CannotUsePrivateLabel);
}
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