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Guard the layout info object. 

llvm-svn: 73928
This commit is contained in:
Owen Anderson 2009-06-23 00:21:15 +00:00
parent 8bae300ade
commit e3c1aca0d9
1 changed files with 5 additions and 0 deletions
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5
llvm/lib/Target/TargetData.cpp
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@ -23,6 +23,7 @@
#include "llvm/Support/GetElementPtrTypeIterator.h"
#include "llvm/Support/MathExtras.h"
#include "llvm/Support/ManagedStatic.h"
#include "llvm/System/Mutex.h"
#include "llvm/ADT/DenseMap.h"
#include "llvm/ADT/StringExtras.h"
#include <algorithm>
@ -345,11 +346,13 @@ typedef DenseMap<LayoutKey, StructLayout*, DenseMapLayoutKeyInfo> LayoutInfoTy;
}
static ManagedStatic<LayoutInfoTy> LayoutInfo;
static ManagedStatic<sys::SmartMutex<true> > LayoutLock;
TargetData::~TargetData() {
if (!LayoutInfo.isConstructed())
return;
sys::SmartScopedLock<true> Lock(&*LayoutLock);
// Remove any layouts for this TD.
LayoutInfoTy &TheMap = *LayoutInfo;
for (LayoutInfoTy::iterator I = TheMap.begin(), E = TheMap.end(); I != E; ) {
@ -366,6 +369,7 @@ TargetData::~TargetData() {
const StructLayout *TargetData::getStructLayout(const StructType *Ty) const {
LayoutInfoTy &TheMap = *LayoutInfo;
sys::SmartScopedLock<true> Lock(&*LayoutLock);
StructLayout *&SL = TheMap[LayoutKey(this, Ty)];
if (SL) return SL;
@ -390,6 +394,7 @@ const StructLayout *TargetData::getStructLayout(const StructType *Ty) const {
void TargetData::InvalidateStructLayoutInfo(const StructType *Ty) const {
if (!LayoutInfo.isConstructed()) return; // No cache.
sys::SmartScopedLock<true> Lock(&*LayoutLock);
LayoutInfoTy::iterator I = LayoutInfo->find(LayoutKey(this, Ty));
if (I == LayoutInfo->end()) return;