Undo unintentional llvm::MaybeAlign changes

Author: kubamracek

lib/IRGen/GenDecl.cpp

@@ -2015,7 +2015,7 @@ swift::irgen::createLinkerDirectiveVariable(IRGenModule &IGM, StringRef name) {
   ApplyIRLinkage({Linkage,
                   llvm::GlobalValue::VisibilityTypes::DefaultVisibility,
         llvm::GlobalValue::DLLStorageClassTypes::DefaultStorageClass}).to(var);
-  var->setAlignment(Alignment);
+  var->setAlignment(llvm::MaybeAlign(Alignment));
   disableAddressSanitizer(IGM, var);
   IGM.addUsedGlobal(var);
   return var;

lib/IRGen/GenKeyPath.cpp

@@ -1316,7 +1316,7 @@ void IRGenModule::emitSILProperty(SILProperty *prop) {
                                     fields.finishAndCreateFuture()));
       var->setConstant(true);
       var->setUnnamedAddr(llvm::GlobalValue::UnnamedAddr::Global);
-      var->setAlignment(4);
+      var->setAlignment(llvm::MaybeAlign(4));
 
       TheTrivialPropertyDescriptor = var;
     } else {

lib/IRGen/GenProto.cpp

@@ -2179,7 +2179,8 @@ void IRGenModule::emitSILWitnessTable(SILWitnessTable *wt) {
                                        initializer)
         : getAddrOfWitnessTable(conf, initializer));
     global->setConstant(isConstantWitnessTable(wt));
-    global->setAlignment(getWitnessTableAlignment().getValue());
+    global->setAlignment(
+        llvm::MaybeAlign(getWitnessTableAlignment().getValue()));
     tableSize = wtableBuilder.getTableSize();
   } else {
     initializer.abandon();