[Alignment][Clang][NFC] Add CharUnits::getAsAlign

Summary:
This is a prerequisite to removing `llvm::GlobalObject::setAlignment(unsigned)`.
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

Subscribers: jholewinski, cfe-commits

Tags: #clang

Differential Revision: https://reviews.llvm.org/D68274

llvm-svn: 373592
diff --git a/clang/lib/CodeGen/CodeGenFunction.h b/clang/lib/CodeGen/CodeGenFunction.h
index c3060d1..02007ab 100644
--- a/clang/lib/CodeGen/CodeGenFunction.h
+++ b/clang/lib/CodeGen/CodeGenFunction.h
@@ -1034,7 +1034,7 @@
     assert(isInConditionalBranch());
     llvm::BasicBlock *block = OutermostConditional->getStartingBlock();
     auto store = new llvm::StoreInst(value, addr.getPointer(), &block->back());
-    store->setAlignment(addr.getAlignment().getQuantity());
+    store->setAlignment(addr.getAlignment().getAsAlign());
   }
 
   /// An RAII object to record that we're evaluating a statement