[Alignment][NFC] Remove StoreInst::setAlignment(unsigned)

Summary:
This is patch is part of a series to introduce an Alignment type.
See this thread for context: http://lists.llvm.org/pipermail/llvm-dev/2019-July/133851.html
See this patch for the introduction of the type: https://reviews.llvm.org/D64790

Reviewers: courbet, bollu, jdoerfert

Subscribers: hiraditya, asbirlea, cfe-commits, llvm-commits

Tags: #clang, #llvm

Differential Revision: https://reviews.llvm.org/D68268

llvm-svn: 373595
diff --git a/llvm/lib/CodeGen/AtomicExpandPass.cpp b/llvm/lib/CodeGen/AtomicExpandPass.cpp
index cc3379f..27b298d 100644
--- a/llvm/lib/CodeGen/AtomicExpandPass.cpp
+++ b/llvm/lib/CodeGen/AtomicExpandPass.cpp
@@ -469,7 +469,7 @@
   Value *NewAddr = Builder.CreateBitCast(Addr, PT);
 
   StoreInst *NewSI = Builder.CreateStore(NewVal, NewAddr);
-  NewSI->setAlignment(SI->getAlignment());
+  NewSI->setAlignment(MaybeAlign(SI->getAlignment()));
   NewSI->setVolatile(SI->isVolatile());
   NewSI->setAtomic(SI->getOrdering(), SI->getSyncScopeID());
   LLVM_DEBUG(dbgs() << "Replaced " << *SI << " with " << *NewSI << "\n");