[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/clang/lib/CodeGen/CGBuiltin.cpp b/clang/lib/CodeGen/CGBuiltin.cpp
index f87a6d6..527e512 100644
--- a/clang/lib/CodeGen/CGBuiltin.cpp
+++ b/clang/lib/CodeGen/CGBuiltin.cpp
@@ -11193,7 +11193,7 @@
     // Unaligned nontemporal store of the scalar value.
     StoreInst *SI = Builder.CreateDefaultAlignedStore(Src, BC);
     SI->setMetadata(CGM.getModule().getMDKindID("nontemporal"), Node);
-    SI->setAlignment(1);
+    SI->setAlignment(llvm::Align::None());
     return SI;
   }
   // Rotate is a special case of funnel shift - 1st 2 args are the same.