diff --git a/clang/lib/CodeGen/BackendUtil.cpp b/clang/lib/CodeGen/BackendUtil.cpp
index 3280417..1311af9 100644
--- a/clang/lib/CodeGen/BackendUtil.cpp
+++ b/clang/lib/CodeGen/BackendUtil.cpp
@@ -60,6 +60,7 @@
 #include "llvm/Transforms/Scalar.h"
 #include "llvm/Transforms/Scalar/GVN.h"
 #include "llvm/Transforms/Utils.h"
+#include "llvm/Transforms/Utils/CanonicalizeAliases.h"
 #include "llvm/Transforms/Utils/NameAnonGlobals.h"
 #include "llvm/Transforms/Utils/SymbolRewriter.h"
 #include <memory>
@@ -996,9 +997,11 @@
       if (LangOpts.Sanitize.has(SanitizerKind::LocalBounds))
         MPM.addPass(createModuleToFunctionPassAdaptor(BoundsCheckingPass()));
 
-      // Lastly, add a semantically necessary pass for LTO.
-      if (IsLTO || IsThinLTO)
+      // Lastly, add semantically necessary passes for LTO.
+      if (IsLTO || IsThinLTO) {
+        MPM.addPass(CanonicalizeAliasesPass());
         MPM.addPass(NameAnonGlobalPass());
+      }
     } else {
       // Map our optimization levels into one of the distinct levels used to
       // configure the pipeline.
@@ -1019,10 +1022,12 @@
       if (IsThinLTO) {
         MPM = PB.buildThinLTOPreLinkDefaultPipeline(
             Level, CodeGenOpts.DebugPassManager);
+        MPM.addPass(CanonicalizeAliasesPass());
         MPM.addPass(NameAnonGlobalPass());
       } else if (IsLTO) {
         MPM = PB.buildLTOPreLinkDefaultPipeline(Level,
                                                 CodeGenOpts.DebugPassManager);
+        MPM.addPass(CanonicalizeAliasesPass());
         MPM.addPass(NameAnonGlobalPass());
       } else {
         MPM = PB.buildPerModuleDefaultPipeline(Level,