diff --git a/clang/lib/CodeGen/CGCall.cpp b/clang/lib/CodeGen/CGCall.cpp
--- a/clang/lib/CodeGen/CGCall.cpp
+++ b/clang/lib/CodeGen/CGCall.cpp
@@ -2445,6 +2445,15 @@
       }
     }
 
+    if (const auto *PtrTy = ParamType->getAs<PointerType>()) {
+      QualType PTy = PtrTy->getPointeeType();
+      if (PTy->isObjectType()) {
+        llvm::Align Alignment =
+            getNaturalPointeeTypeAlignment(ParamType).getAsAlign();
+        Attrs.addAlignmentAttr(Alignment);
+      }
+    }
+
     switch (FI.getExtParameterInfo(ArgNo).getABI()) {
     case ParameterABI::Ordinary:
       break;