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For PR645:

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Implement new syntax for local and global symbols. Types and local
symbols use the % prefix. Global variables and functions use the @ prefix.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33523 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Reid Spencer 2007-01-26 08:02:52 +00:00
parent 0fc052c36f
commit 3702d265b8
1 changed files with 53 additions and 93 deletions
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142
lib/VMCore/AsmWriter.cpp
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@ -179,31 +179,47 @@ static SlotMachine *createSlotMachine(const Value *V) {
return 0;
}
// getLLVMName - Turn the specified string into an 'LLVM name', which is either
// prefixed with % (if the string only contains simple characters) or is
// surrounded with ""'s (if it has special chars in it).
static std::string getLLVMName(const std::string &Name,
bool prefixName = true) {
assert(!Name.empty() && "Cannot get empty name!");
// First character cannot start with a number...
if (Name[0] >= '0' && Name[0] <= '9')
return "\"" + Name + "\"";
/// NameNeedsQuotes - Return true if the specified llvm name should be wrapped
/// with ""'s.
static bool NameNeedsQuotes(const std::string &Name) {
if (Name[0] >= '0' && Name[0] <= '9') return true;
// Scan to see if we have any characters that are not on the "white list"
for (unsigned i = 0, e = Name.size(); i != e; ++i) {
char C = Name[i];
assert(C != '"' && "Illegal character in LLVM value name!");
if ((C < 'a' || C > 'z') && (C < 'A' || C > 'Z') && (C < '0' || C > '9') &&
C != '-' && C != '.' && C != '_')
return true;
}
return false;
}
enum PrefixType {
GlobalPrefix,
LabelPrefix,
LocalPrefix
};
/// getLLVMName - Turn the specified string into an 'LLVM name', which is either
/// prefixed with % (if the string only contains simple characters) or is
/// surrounded with ""'s (if it has special chars in it).
static std::string getLLVMName(const std::string &Name, PrefixType Prefix) {
assert(!Name.empty() && "Cannot get empty name!");
// First character cannot start with a number...
if (NameNeedsQuotes(Name)) {
if (Prefix == GlobalPrefix)
return "@\"" + Name + "\"";
return "\"" + Name + "\"";
}
// If we get here, then the identifier is legal to use as a "VarID".
if (prefixName)
return "%"+Name;
else
return Name;
switch (Prefix) {
default: assert(0 && "Bad prefix!");
case GlobalPrefix: return '@' + Name;
case LabelPrefix: return Name;
case LocalPrefix: return '%' + Name;
}
}
@ -224,7 +240,7 @@ static void fillTypeNameTable(const Module *M,
!cast<PointerType>(Ty)->getElementType()->isPrimitiveType() ||
!cast<PointerType>(Ty)->getElementType()->isInteger() ||
isa<OpaqueType>(cast<PointerType>(Ty)->getElementType()))
TypeNames.insert(std::make_pair(Ty, getLLVMName(TI->first)));
TypeNames.insert(std::make_pair(Ty, getLLVMName(TI->first, LocalPrefix)));
}
}
@ -587,7 +603,8 @@ static void WriteAsOperandInternal(std::ostream &Out, const Value *V,
SlotMachine *Machine) {
Out << ' ';
if (V->hasName())
Out << getLLVMName(V->getName());
Out << getLLVMName(V->getName(),
isa<GlobalValue>(V) ? GlobalPrefix : LocalPrefix);
else {
const Constant *CV = dyn_cast<Constant>(V);
if (CV && !isa<GlobalValue>(CV)) {
@ -602,26 +619,31 @@ static void WriteAsOperandInternal(std::ostream &Out, const Value *V,
PrintEscapedString(IA->getConstraintString(), Out);
Out << '"';
} else {
char Prefix = '%';
int Slot;
if (Machine) {
if (const GlobalValue *GV = dyn_cast<GlobalValue>(V))
if (const GlobalValue *GV = dyn_cast<GlobalValue>(V)) {
Slot = Machine->getGlobalSlot(GV);
else
Prefix = '@';
} else {
Slot = Machine->getLocalSlot(V);
}
} else {
Machine = createSlotMachine(V);
if (Machine) {
if (const GlobalValue *GV = dyn_cast<GlobalValue>(V))
if (const GlobalValue *GV = dyn_cast<GlobalValue>(V)) {
Slot = Machine->getGlobalSlot(GV);
else
Prefix = '@';
} else {
Slot = Machine->getLocalSlot(V);
}
} else {
Slot = -1;
}
delete Machine;
}
if (Slot != -1)
Out << '%' << Slot;
Out << Prefix << Slot;
else
Out << "<badref>";
}
@ -672,7 +694,6 @@ public:
inline void write(const Function *F) { printFunction(F); }
inline void write(const BasicBlock *BB) { printBasicBlock(BB); }
inline void write(const Instruction *I) { printInstruction(*I); }
inline void write(const Constant *CPV) { printConstant(CPV); }
inline void write(const Type *Ty) { printType(Ty); }
void writeOperand(const Value *Op, bool PrintType);
@ -682,8 +703,6 @@ public:
private:
void printModule(const Module *M);
void printTypeSymbolTable(const TypeSymbolTable &ST);
void printValueSymbolTable(const SymbolTable &ST);
void printConstant(const Constant *CPV);
void printGlobal(const GlobalVariable *GV);
void printFunction(const Function *F);
void printArgument(const Argument *FA, FunctionType::ParameterAttributes A);
@ -787,17 +806,6 @@ void AssemblyWriter::printModule(const Module *M) {
if (!M->getDataLayout().empty())
Out << "target datalayout = \"" << M->getDataLayout() << "\"\n";
switch (M->getEndianness()) {
case Module::LittleEndian: Out << "target endian = little\n"; break;
case Module::BigEndian: Out << "target endian = big\n"; break;
case Module::AnyEndianness: break;
}
switch (M->getPointerSize()) {
case Module::Pointer32: Out << "target pointersize = 32\n"; break;
case Module::Pointer64: Out << "target pointersize = 64\n"; break;
case Module::AnyPointerSize: break;
}
if (!M->getTargetTriple().empty())
Out << "target triple = \"" << M->getTargetTriple() << "\"\n";
@ -837,7 +845,6 @@ void AssemblyWriter::printModule(const Module *M) {
// Loop over the symbol table, emitting all named constants.
printTypeSymbolTable(M->getTypeSymbolTable());
printValueSymbolTable(M->getValueSymbolTable());
for (Module::const_global_iterator I = M->global_begin(), E = M->global_end();
I != E; ++I)
@ -851,7 +858,7 @@ void AssemblyWriter::printModule(const Module *M) {
}
void AssemblyWriter::printGlobal(const GlobalVariable *GV) {
if (GV->hasName()) Out << getLLVMName(GV->getName()) << " = ";
if (GV->hasName()) Out << getLLVMName(GV->getName(), GlobalPrefix) << " = ";
if (!GV->hasInitializer())
switch (GV->getLinkage()) {
@ -901,7 +908,7 @@ void AssemblyWriter::printTypeSymbolTable(const TypeSymbolTable &ST) {
// Print the types.
for (TypeSymbolTable::const_iterator TI = ST.begin(), TE = ST.end();
TI != TE; ++TI) {
Out << "\t" << getLLVMName(TI->first) << " = type ";
Out << "\t" << getLLVMName(TI->first, LocalPrefix) << " = type ";
// Make sure we print out at least one level of the type structure, so
// that we do not get %FILE = type %FILE
@ -910,52 +917,12 @@ void AssemblyWriter::printTypeSymbolTable(const TypeSymbolTable &ST) {
}
}
// printSymbolTable - Run through symbol table looking for constants
// and types. Emit their declarations.
void AssemblyWriter::printValueSymbolTable(const SymbolTable &ST) {
// Print the constants, in type plane order.
for (SymbolTable::plane_const_iterator PI = ST.plane_begin();
PI != ST.plane_end(); ++PI) {
SymbolTable::value_const_iterator VI = ST.value_begin(PI->first);
SymbolTable::value_const_iterator VE = ST.value_end(PI->first);
for (; VI != VE; ++VI) {
const Value* V = VI->second;
const Constant *CPV = dyn_cast<Constant>(V) ;
if (CPV && !isa<GlobalValue>(V)) {
printConstant(CPV);
}
}
}
}
/// printConstant - Print out a constant pool entry...
///
void AssemblyWriter::printConstant(const Constant *CPV) {
// Don't print out unnamed constants, they will be inlined
if (!CPV->hasName()) return;
// Print out name...
Out << "\t" << getLLVMName(CPV->getName()) << " =";
// Write the value out now.
writeOperand(CPV, true);
printInfoComment(*CPV);
Out << "\n";
}
/// printFunction - Print all aspects of a function.
///
void AssemblyWriter::printFunction(const Function *F) {
// Print out the return type and name...
Out << "\n";
// Ensure that no local symbols conflict with global symbols.
const_cast<Function*>(F)->renameLocalSymbols();
if (AnnotationWriter) AnnotationWriter->emitFunctionAnnot(F, Out);
if (F->isExternal())
@ -1000,9 +967,9 @@ void AssemblyWriter::printFunction(const Function *F) {
const FunctionType *FT = F->getFunctionType();
printType(F->getReturnType()) << ' ';
if (!F->getName().empty())
Out << getLLVMName(F->getName());
Out << getLLVMName(F->getName(), GlobalPrefix);
else
Out << "\"\"";
Out << "@\"\"";
Out << '(';
Machine.incorporateFunction(F);
@ -1058,14 +1025,14 @@ void AssemblyWriter::printArgument(const Argument *Arg,
// Output name, if available...
if (Arg->hasName())
Out << ' ' << getLLVMName(Arg->getName());
Out << ' ' << getLLVMName(Arg->getName(), LocalPrefix);
}
/// printBasicBlock - This member is called for each basic block in a method.
///
void AssemblyWriter::printBasicBlock(const BasicBlock *BB) {
if (BB->hasName()) { // Print out the label if it exists...
Out << "\n" << getLLVMName(BB->getName(), false) << ':';
Out << "\n" << getLLVMName(BB->getName(), LabelPrefix) << ':';
} else if (!BB->use_empty()) { // Don't print block # of no uses...
Out << "\n; <label>:";
int Slot = Machine.getLocalSlot(BB);
@ -1139,7 +1106,7 @@ void AssemblyWriter::printInstruction(const Instruction &I) {
// Print out name if it exists...
if (I.hasName())
Out << getLLVMName(I.getName()) << " = ";
Out << getLLVMName(I.getName(), LocalPrefix) << " = ";
// If this is a volatile load or store, print out the volatile marker.
if ((isa<LoadInst>(I) && cast<LoadInst>(I).isVolatile()) ||
@ -1533,17 +1500,10 @@ int SlotMachine::getLocalSlot(const Value *V) {
// Lookup the Value in the function and module maps.
ValueMap::const_iterator FVI = FI->second.map.find(V);
TypedPlanes::const_iterator MI = mMap.find(VTy);
// If the value doesn't exist in the function map, it is a <badref>
if (FVI == FI->second.map.end()) return -1;
// Return the slot number as the module's contribution to
// the type plane plus the index in the function's contribution
// to the type plane.
if (MI != mMap.end())
return MI->second.next_slot + FVI->second;
else
return FVI->second;
}