[LLVM][Alignment] Introduce Alignment Type

Summary:
This is patch is part of a serie 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, jfb, jakehehrlich

Reviewed By: jfb

Subscribers: wuzish, jholewinski, arsenm, dschuff, nemanjai, jvesely, nhaehnle, javed.absar, sbc100, jgravelle-google, hiraditya, aheejin, kbarton, asb, rbar, johnrusso, simoncook, apazos, sabuasal, niosHD, jrtc27, MaskRay, zzheng, edward-jones, rogfer01, MartinMosbeck, brucehoult, the_o, dexonsmith, PkmX, jocewei, jsji, s.egerton, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D65514

llvm-svn: 367828
diff --git a/llvm/lib/CodeGen/GlobalISel/IRTranslator.cpp b/llvm/lib/CodeGen/GlobalISel/IRTranslator.cpp
index 8b89070..b032f7a 100644
--- a/llvm/lib/CodeGen/GlobalISel/IRTranslator.cpp
+++ b/llvm/lib/CodeGen/GlobalISel/IRTranslator.cpp
@@ -1623,13 +1623,14 @@
   TargetLowering::IntrinsicInfo Info;
   // TODO: Add a GlobalISel version of getTgtMemIntrinsic.
   if (TLI.getTgtMemIntrinsic(Info, CI, *MF, ID)) {
-    unsigned Align = Info.align;
-    if (Align == 0)
-      Align = DL->getABITypeAlignment(Info.memVT.getTypeForEVT(F->getContext()));
+    MaybeAlign Align = Info.align;
+    if (!Align)
+      Align = MaybeAlign(
+          DL->getABITypeAlignment(Info.memVT.getTypeForEVT(F->getContext())));
 
     uint64_t Size = Info.memVT.getStoreSize();
-    MIB.addMemOperand(MF->getMachineMemOperand(MachinePointerInfo(Info.ptrVal),
-                                               Info.flags, Size, Align));
+    MIB.addMemOperand(MF->getMachineMemOperand(
+        MachinePointerInfo(Info.ptrVal), Info.flags, Size, Align->value()));
   }
 
   return true;