diff options
| -rw-r--r-- | lib/Analysis/BasicAliasAnalysis.cpp | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/lib/Analysis/BasicAliasAnalysis.cpp b/lib/Analysis/BasicAliasAnalysis.cpp index 381298b..be8fe07 100644 --- a/lib/Analysis/BasicAliasAnalysis.cpp +++ b/lib/Analysis/BasicAliasAnalysis.cpp @@ -245,8 +245,9 @@ BasicAliasAnalysis::getModRefInfo(CallSite CS, Value *P, unsigned Size) { if (!isa<Constant>(P)) { const Value *Object = getUnderlyingObject(P); // Allocations and byval arguments are "new" objects. - if (isa<AllocationInst>(Object) || - (isa<Argument>(Object) && cast<Argument>(Object)->hasByValAttr())) { + if (Object && + (isa<AllocationInst>(Object) || + (isa<Argument>(Object) && cast<Argument>(Object)->hasByValAttr()))) { // Okay, the pointer is to a stack allocated object. If we can prove that // the pointer never "escapes", then we know the call cannot clobber it, // because it simply can't get its address. |