1 files changed, 2 insertions, 5 deletions
diff --git a/llvm/lib/Transforms/Instrumentation/AddressSanitizer.cpp b/llvm/lib/Transforms/Instrumentation/AddressSanitizer.cpp
index 2646334..cb6ca72 100644
--- a/llvm/lib/Transforms/Instrumentation/AddressSanitizer.cpp
+++ b/llvm/lib/Transforms/Instrumentation/AddressSanitizer.cpp
@@ -1494,11 +1494,8 @@ void AddressSanitizer::getInterestingMemoryOperands(
       if (ignoreAccess(I, BasePtr))
         return;
       Type *Ty = IsWrite ? CI->getArgOperand(0)->getType() : CI->getType();
-      MaybeAlign Alignment = Align(1);
-      // Otherwise no alignment guarantees. We probably got Undef.
-      if (auto *Op = dyn_cast<ConstantInt>(CI->getOperand(1 + OpOffset)))
-        Alignment = Op->getMaybeAlignValue();
-      Value *Mask = CI->getOperand(2 + OpOffset);
+      MaybeAlign Alignment = CI->getParamAlign(0);
+      Value *Mask = CI->getOperand(1 + OpOffset);
       Interesting.emplace_back(I, OpOffset, IsWrite, Ty, Alignment, Mask);
       break;
     }