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fix infinite recursion if a global's initializer references the global

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51617 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Nick Kledzik 2008-05-27 22:07:08 +00:00
parent 1b9e1672fb
commit 9178a65263
1 changed files with 7 additions and 2 deletions
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9
tools/lto2/LTOModule.cpp
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@ -161,7 +161,7 @@ void LTOModule::addDefinedDataSymbol(GlobalValue* v, Mangler &mangler)
addDefinedSymbol(v, mangler, false); addDefinedSymbol(v, mangler, false);
// add external symbols referenced by this data. // add external symbols referenced by this data.
for (unsigned count = 0, total = v->getNumOperands();\ for (unsigned count = 0, total = v->getNumOperands();
count != total; ++count) { count != total; ++count) {
findExternalRefs(v->getOperand(count), mangler); findExternalRefs(v->getOperand(count), mangler);
} }
@ -234,8 +234,13 @@ void LTOModule::findExternalRefs(Value* value, Mangler &mangler) {
if (GlobalValue* gv = dyn_cast<GlobalValue>(value)) { if (GlobalValue* gv = dyn_cast<GlobalValue>(value)) {
if ( !gv->hasExternalLinkage() ) if ( !gv->hasExternalLinkage() )
addPotentialUndefinedSymbol(gv, mangler); addPotentialUndefinedSymbol(gv, mangler);
// If this is a variable definition, do not recursively process
// initializer. It might contain a reference to this variable
// and cause an infinite loop. The initializer will be
// processed in addDefinedDataSymbol().
return;
} }
// GlobalValue, even with InternalLinkage type, may have operands with // GlobalValue, even with InternalLinkage type, may have operands with
// ExternalLinkage type. Do not ignore these operands. // ExternalLinkage type. Do not ignore these operands.
if (Constant* c = dyn_cast<Constant>(value)) { if (Constant* c = dyn_cast<Constant>(value)) {