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Continue simplifying error handling, s/method/function

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@5714 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2003-03-06 17:15:19 +00:00
parent b6c46959fd
commit 2a7b6bab7a
2 changed files with 48 additions and 60 deletions
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100
lib/Bytecode/Reader/Reader.cpp
View File

@ -28,7 +28,7 @@ bool BytecodeParser::getTypeSlot(const Type *Ty, unsigned &Slot) {
if (Ty->isPrimitiveType()) {
Slot = Ty->getPrimitiveID();
} else {
// Check the method level types first...
// Check the function level types first...
TypeValuesListTy::iterator I = find(MethodTypeValues.begin(),
MethodTypeValues.end(), Ty);
if (I != MethodTypeValues.end()) {
@ -90,7 +90,7 @@ Value *BytecodeParser::getValue(const Type *Ty, unsigned oNum, bool Create) {
if (Num < ModuleTypeValues.size())
return (Value*)ModuleTypeValues[Num].get();
// Nope, is it a method level type?
// Nope, is it a function level type?
Num -= ModuleTypeValues.size();
if (Num < MethodTypeValues.size())
return (Value*)MethodTypeValues[Num].get();
@ -112,7 +112,7 @@ Value *BytecodeParser::getValue(const Type *Ty, unsigned oNum, bool Create) {
Value *d = 0;
switch (Ty->getPrimitiveID()) {
case Type::FunctionTyID:
std::cerr << "Creating method pholder! : " << type << ":" << oNum << " "
std::cerr << "Creating function pholder! : " << type << ":" << oNum << " "
<< Ty->getName() << "\n";
d = new FunctionPHolder(Ty, oNum);
if (insertValue(d, LateResolveModuleValues) == -1) return 0;
@ -274,18 +274,17 @@ void BytecodeParser::ResolveReferencesToValue(Value *NewV, unsigned Slot) {
GlobalRefs.erase(I); // Remove the map entry for it
}
bool BytecodeParser::ParseMethod(const uchar *&Buf, const uchar *EndBuf,
Module *C) {
bool BytecodeParser::ParseMethod(const uchar *&Buf, const uchar *EndBuf) {
// Clear out the local values table...
Values.clear();
if (FunctionSignatureList.empty()) {
Error = "Function found, but FunctionSignatureList empty!";
return true; // Unexpected method!
return true; // Unexpected function!
}
const PointerType *PMTy = FunctionSignatureList.back().first; // PtrMeth
const FunctionType *MTy = dyn_cast<FunctionType>(PMTy->getElementType());
if (MTy == 0) return true; // Not ptr to method!
if (MTy == 0) return true; // Not ptr to function!
unsigned isInternal;
if (read_vbr(Buf, EndBuf, isInternal)) return true;
@ -294,14 +293,14 @@ bool BytecodeParser::ParseMethod(const uchar *&Buf, const uchar *EndBuf,
FunctionSignatureList.pop_back();
Function *M = new Function(MTy, isInternal != 0);
BCR_TRACE(2, "METHOD TYPE: " << MTy << "\n");
BCR_TRACE(2, "FUNCTION TYPE: " << MTy << "\n");
const FunctionType::ParamTypes &Params = MTy->getParamTypes();
Function::aiterator AI = M->abegin();
for (FunctionType::ParamTypes::const_iterator It = Params.begin();
It != Params.end(); ++It, ++AI) {
if (insertValue(AI, Values) == -1) {
Error = "Error reading method arguments!\n";
Error = "Error reading function arguments!\n";
delete M; return true;
}
}
@ -358,7 +357,7 @@ bool BytecodeParser::ParseMethod(const uchar *&Buf, const uchar *EndBuf,
if (postResolveValues(LateResolveValues) ||
postResolveValues(LateResolveModuleValues)) {
Error = "Error resolving method values!";
Error = "Error resolving function values!";
delete M; return true; // Unresolvable references!
}
@ -370,15 +369,15 @@ bool BytecodeParser::ParseMethod(const uchar *&Buf, const uchar *EndBuf,
assert(!getTypeSlot(MTy, type) && "How can meth type not exist?");
getTypeSlot(PMTy, type);
C->getFunctionList().push_back(M);
TheModule->getFunctionList().push_back(M);
// Replace placeholder with the real method pointer...
// Replace placeholder with the real function pointer...
ModuleValues[type][MethSlot] = M;
// Clear out method level types...
// Clear out function level types...
MethodTypeValues.clear();
// If anyone is using the placeholder make them use the real method instead
// If anyone is using the placeholder make them use the real function instead
FunctionPHolder->replaceAllUsesWith(M);
// We don't need the placeholder anymore!
@ -389,8 +388,7 @@ bool BytecodeParser::ParseMethod(const uchar *&Buf, const uchar *EndBuf,
return false;
}
bool BytecodeParser::ParseModuleGlobalInfo(const uchar *&Buf, const uchar *End,
Module *Mod) {
bool BytecodeParser::ParseModuleGlobalInfo(const uchar *&Buf, const uchar *End){
if (!FunctionSignatureList.empty()) {
Error = "Two ModuleGlobalInfo packets found!";
return true; // Two ModuleGlobal blocks?
@ -430,7 +428,7 @@ bool BytecodeParser::ParseModuleGlobalInfo(const uchar *&Buf, const uchar *End,
int DestSlot = insertValue(GV, ModuleValues);
if (DestSlot == -1) return true;
Mod->getGlobalList().push_back(GV);
TheModule->getGlobalList().push_back(GV);
ResolveReferencesToValue(GV, (unsigned)DestSlot);
@ -440,7 +438,7 @@ bool BytecodeParser::ParseModuleGlobalInfo(const uchar *&Buf, const uchar *End,
if (read_vbr(Buf, End, VarType)) return true;
}
// Read the method signatures for all of the methods that are coming, and
// Read the function signatures for all of the functions that are coming, and
// create fillers in the Value tables.
unsigned FnSignature;
if (read_vbr(Buf, End, FnSignature)) return true;
@ -452,13 +450,13 @@ bool BytecodeParser::ParseModuleGlobalInfo(const uchar *&Buf, const uchar *End,
return true;
}
// We create methods by passing the underlying FunctionType to create...
// We create functions by passing the underlying FunctionType to create...
Ty = cast<PointerType>(Ty)->getElementType();
// When the ModuleGlobalInfo section is read, we load the type of each
// method and the 'ModuleValues' slot that it lands in. We then load a
// placeholder into its slot to reserve it. When the method is loaded, this
// placeholder is replaced.
// function and the 'ModuleValues' slot that it lands in. We then load a
// placeholder into its slot to reserve it. When the function is loaded,
// this placeholder is replaced.
// Insert the placeholder...
Value *Val = new FunctionPHolder(Ty, 0);
@ -471,7 +469,7 @@ bool BytecodeParser::ParseModuleGlobalInfo(const uchar *&Buf, const uchar *End,
unsigned SlotNo = ModuleValues[TypeSlot].size()-1;
// Keep track of this information in a linked list that is emptied as
// methods are loaded...
// functions are loaded...
//
FunctionSignatureList.push_back(
std::make_pair(cast<const PointerType>(Val->getType()), SlotNo));
@ -492,9 +490,7 @@ bool BytecodeParser::ParseModuleGlobalInfo(const uchar *&Buf, const uchar *End,
return false;
}
bool BytecodeParser::ParseModule(const uchar *Buf, const uchar *EndBuf,
Module *&Mod) {
bool BytecodeParser::ParseModule(const uchar *Buf, const uchar *EndBuf) {
unsigned Type, Size;
if (readBlock(Buf, EndBuf, Type, Size)) return true;
if (Type != BytecodeFormat::Module || Buf+Size != EndBuf) {
@ -510,40 +506,31 @@ bool BytecodeParser::ParseModule(const uchar *Buf, const uchar *EndBuf,
if (align32(Buf, EndBuf)) return true;
BCR_TRACE(1, "FirstDerivedTyID = " << FirstDerivedTyID << "\n");
TheModule = Mod = new Module();
while (Buf < EndBuf) {
const unsigned char *OldBuf = Buf;
if (readBlock(Buf, EndBuf, Type, Size)) { delete Mod; return true;}
if (readBlock(Buf, EndBuf, Type, Size)) return true;
switch (Type) {
case BytecodeFormat::ConstantPool:
BCR_TRACE(1, "BLOCK BytecodeFormat::ConstantPool: {\n");
if (ParseConstantPool(Buf, Buf+Size, ModuleValues, ModuleTypeValues)) {
delete Mod; return true;
}
if (ParseConstantPool(Buf, Buf+Size, ModuleValues, ModuleTypeValues))
return true;
break;
case BytecodeFormat::ModuleGlobalInfo:
BCR_TRACE(1, "BLOCK BytecodeFormat::ModuleGlobalInfo: {\n");
if (ParseModuleGlobalInfo(Buf, Buf+Size, Mod)) {
delete Mod; return true;
}
if (ParseModuleGlobalInfo(Buf, Buf+Size)) return true;
break;
case BytecodeFormat::Function: {
BCR_TRACE(1, "BLOCK BytecodeFormat::Function: {\n");
if (ParseMethod(Buf, Buf+Size, Mod)) {
delete Mod; return true; // Error parsing function
}
if (ParseMethod(Buf, Buf+Size)) return true; // Error parsing function
break;
}
case BytecodeFormat::SymbolTable:
BCR_TRACE(1, "BLOCK BytecodeFormat::SymbolTable: {\n");
if (ParseSymbolTable(Buf, Buf+Size, &Mod->getSymbolTable())) {
delete Mod; return true;
}
if (ParseSymbolTable(Buf, Buf+Size, &TheModule->getSymbolTable()))
return true;
break;
default:
@ -553,10 +540,10 @@ bool BytecodeParser::ParseModule(const uchar *Buf, const uchar *EndBuf,
break;
}
BCR_TRACE(1, "} end block\n");
if (align32(Buf, EndBuf)) { delete Mod; return true; }
if (align32(Buf, EndBuf)) return true;
}
if (!FunctionSignatureList.empty()) { // Expected more methods!
if (!FunctionSignatureList.empty()) { // Expected more functions!
Error = "Function expected, but bytecode stream at end!";
return true;
}
@ -565,19 +552,25 @@ bool BytecodeParser::ParseModule(const uchar *Buf, const uchar *EndBuf,
return false;
}
static inline Module *Error(std::string *ErrorStr, const char *Message) {
if (ErrorStr) *ErrorStr = Message;
return 0;
}
Module *BytecodeParser::ParseBytecode(const uchar *Buf, const uchar *EndBuf) {
LateResolveValues.clear();
unsigned Sig;
// Read and check signature...
if (read(Buf, EndBuf, Sig) ||
Sig != ('l' | ('l' << 8) | ('v' << 16) | 'm' << 24)) {
Error = "Invalid bytecode signature!";
return 0; // Invalid signature!
}
Sig != ('l' | ('l' << 8) | ('v' << 16) | 'm' << 24))
return ::Error(&Error, "Invalid bytecode signature!");
Module *Result;
if (ParseModule(Buf, EndBuf, Result)) return 0;
return Result;
TheModule = new Module();
if (ParseModule(Buf, EndBuf)) {
delete TheModule;
TheModule = 0;
}
return TheModule;
}
@ -602,11 +595,6 @@ public:
}
};
static inline Module *Error(std::string *ErrorStr, const char *Message) {
if (ErrorStr) *ErrorStr = Message;
return 0;
}
// Parse and return a class file...
//
Module *ParseBytecodeFile(const std::string &Filename, std::string *ErrorStr) {

6
lib/Bytecode/Reader/ReaderInternals.h
View File

@ -89,10 +89,10 @@ private: // All of this data is transient across calls to ParseBytecode
std::vector<std::pair<const PointerType *, unsigned> > FunctionSignatureList;
private:
bool ParseModule (const uchar * Buf, const uchar *End, Module *&);
bool ParseModuleGlobalInfo(const uchar *&Buf, const uchar *End, Module *);
bool ParseModule (const uchar * Buf, const uchar *End);
bool ParseModuleGlobalInfo(const uchar *&Buf, const uchar *End);
bool ParseSymbolTable (const uchar *&Buf, const uchar *End, SymbolTable *);
bool ParseMethod (const uchar *&Buf, const uchar *End, Module *);
bool ParseMethod (const uchar *&Buf, const uchar *End);
bool ParseBasicBlock (const uchar *&Buf, const uchar *End, BasicBlock *&);
bool ParseInstruction (const uchar *&Buf, const uchar *End, Instruction *&,
BasicBlock *BB /*HACK*/);