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Implement review feedback. Aliasees can be either GlobalValue's or

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bitcasts of them.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36537 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Anton Korobeynikov
2007-04-28 13:45:00 +00:00
parent 44b2c5098f
commit a80e1181b7
20 changed files with 231 additions and 113 deletions
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41
lib/Bytecode/Reader/Reader.cpp
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@@ -1923,12 +1923,10 @@ void BytecodeReader::ParseModuleGlobalInfo() {
// Read aliases...
unsigned VarType = read_vbr_uint();
while (VarType != Type::VoidTyID) { // List is terminated by Void
unsigned TypeSlotNo = VarType >> 2;
unsigned TypeSlotNo = VarType >> 3;
unsigned EncodedLinkage = VarType & 3;
unsigned AliaseeTypeSlotNo, AliaseeSlotNo;
AliaseeTypeSlotNo = read_vbr_uint();
AliaseeSlotNo = read_vbr_uint();
bool isConstantAliasee = (VarType >> 2) & 1;
unsigned AliaseeSlotNo = read_vbr_uint();
const Type *Ty = getType(TypeSlotNo);
if (!Ty)
@@ -1937,11 +1935,11 @@ void BytecodeReader::ParseModuleGlobalInfo() {
if (!isa<PointerType>(Ty))
error("Alias not a pointer type! Ty= " + Ty->getDescription());
Value* V = getValue(AliaseeTypeSlotNo, AliaseeSlotNo, false);
if (!V)
error("Invalid aliasee! TypeSlotNo=" + utostr(AliaseeTypeSlotNo) +
Value* V = getValue(TypeSlotNo, AliaseeSlotNo, false);
if (!V && !isConstantAliasee)
error("Invalid aliasee! TypeSlotNo=" + utostr(TypeSlotNo) +
" SlotNo=" + utostr(AliaseeSlotNo));
if (!isa<GlobalValue>(V))
if (!isConstantAliasee && !isa<GlobalValue>(V))
error("Aliasee is not global value! SlotNo=" + utostr(AliaseeSlotNo));
GlobalValue::LinkageTypes Linkage;
@@ -1960,8 +1958,14 @@ void BytecodeReader::ParseModuleGlobalInfo() {
}
GlobalAlias *GA = new GlobalAlias(Ty, Linkage, "",
dyn_cast<GlobalValue>(V), TheModule);
dyn_cast_or_null<Constant>(V),
TheModule);
insertValue(GA, TypeSlotNo, ModuleValues);
if (!V && isConstantAliasee)
Aliasees.push_back(std::make_pair(GA, AliaseeSlotNo));
if (Handler) Handler->handleGlobalAlias(Ty, Linkage,
TypeSlotNo, AliaseeSlotNo);
VarType = read_vbr_uint();
}
}
@@ -2068,6 +2072,23 @@ void BytecodeReader::ParseModule() {
error("Cannot find initializer value.");
}
// And aliasees
while (!Aliasees.empty()) {
GlobalAlias *GA = Aliasees.back().first;
unsigned Slot = Aliasees.back().second;
Aliasees.pop_back();
// Look up the aliasee value...
const llvm::PointerType* GAType = GA->getType();
unsigned TypeSlot = getTypeSlot(GAType);
if (Constant *CV = getConstantValue(TypeSlot, Slot)) {
if (GA->getAliasee())
error("Aliasee was *already* set?!");
GA->setAliasee(CV);
} else
error("Cannot find aliasee value.");
}
if (!ConstantFwdRefs.empty())
error("Use of undefined constants in a module");