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Allow types that have been forwarded to to be freed.

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Tested: make check-lit && valgrind --dsymutil=yes --leak-check=full unittests/ExecutionEngine/JIT/Debug/JITTests


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@98447 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jeffrey Yasskin 2010-03-13 20:09:55 +00:00
parent 06e59e738c
commit eca52b609c
1 changed files with 11 additions and 4 deletions
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15
lib/VMCore/Type.cpp
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@ -87,6 +87,11 @@ void Type::destroy() const {
pImpl->OpaqueTypes.erase(opaque_this);
}
if (ForwardType && ForwardType->isAbstract()) {
ForwardType->dropRef();
ForwardType = NULL;
}
// For all the other type subclasses, there is either no contained types or
// just one (all Sequentials). For Sequentials, the PATypeHandle is not
// allocated past the type object, its included directly in the SequentialType
@ -254,10 +259,12 @@ const Type *Type::getForwardedTypeInternal() const {
// Yes, it is forwarded again. First thing, add the reference to the new
// forward type.
if (RealForwardedType->isAbstract())
cast<DerivedType>(RealForwardedType)->addRef();
RealForwardedType->addRef();
// Now drop the old reference. This could cause ForwardType to get deleted.
cast<DerivedType>(ForwardType)->dropRef();
// ForwardType must be abstract because only abstract types can have their own
// ForwardTypes.
ForwardType->dropRef();
// Return the updated type.
ForwardType = RealForwardedType;
@ -1142,8 +1149,8 @@ void DerivedType::unlockedRefineAbstractTypeTo(const Type *NewType) {
// Any PATypeHolders referring to this type will now automatically forward to
// the type we are resolved to.
ForwardType = NewType;
if (NewType->isAbstract())
cast<DerivedType>(NewType)->addRef();
if (ForwardType->isAbstract())
ForwardType->addRef();
// Add a self use of the current type so that we don't delete ourself until
// after the function exits.