[AliasAnalysis] Misc fixes for checking aliasing with scalable types.

[lldb.git] / llvm / lib / Analysis / MemoryBuiltins.cpp

diff --git a/llvm/lib/Analysis/MemoryBuiltins.cpp b/llvm/lib/Analysis/MemoryBuiltins.cpp
index 427e6fd..be0feeb 100644 (file)
--- a/llvm/lib/Analysis/MemoryBuiltins.cpp
+++ b/llvm/lib/Analysis/MemoryBuiltins.cpp
@@ -633,6 +633,10 @@ SizeOffsetType ObjectSizeOffsetVisitor::visitAllocaInst(AllocaInst &I) {
   if (!I.getAllocatedType()->isSized())
     return unknown();
 
+  if (I.getAllocatedType()->isVectorTy() &&
+      I.getAllocatedType()->getVectorIsScalable())
+    return unknown();
+
   APInt Size(IntTyBits, DL.getTypeAllocSize(I.getAllocatedType()));
   if (!I.isArrayAllocation())
     return std::make_pair(align(Size, I.getAlignment()), Zero);