diff --git a/llvm/lib/Bitcode/Writer/BitcodeWriter.cpp b/llvm/lib/Bitcode/Writer/BitcodeWriter.cpp
--- a/llvm/lib/Bitcode/Writer/BitcodeWriter.cpp
+++ b/llvm/lib/Bitcode/Writer/BitcodeWriter.cpp
@@ -4855,7 +4855,7 @@
                                 const std::vector<uint8_t> &CmdArgs) {
   // Save llvm.compiler.used and remove it.
   SmallVector<Constant *, 2> UsedArray;
-  SmallPtrSet<GlobalValue *, 4> UsedGlobals;
+  SmallVector<GlobalValue *, 4> UsedGlobals;
   Type *UsedElementType = Type::getInt8Ty(M.getContext())->getPointerTo(0);
   GlobalVariable *Used = collectUsedGlobalVariables(M, UsedGlobals, true);
   for (auto *GV : UsedGlobals) {
diff --git a/llvm/lib/Transforms/IPO/LowerTypeTests.cpp b/llvm/lib/Transforms/IPO/LowerTypeTests.cpp
--- a/llvm/lib/Transforms/IPO/LowerTypeTests.cpp
+++ b/llvm/lib/Transforms/IPO/LowerTypeTests.cpp
@@ -336,7 +336,7 @@
 
 struct ScopedSaveAliaseesAndUsed {
   Module &M;
-  SmallPtrSet<GlobalValue *, 16> Used, CompilerUsed;
+  SmallVector<GlobalValue *, 4> Used, CompilerUsed;
   std::vector<std::pair<GlobalIndirectSymbol *, Function *>> FunctionAliases;
 
   ScopedSaveAliaseesAndUsed(Module &M) : M(M) {
@@ -367,9 +367,8 @@
   }
 
   ~ScopedSaveAliaseesAndUsed() {
-    appendToUsed(M, std::vector<GlobalValue *>(Used.begin(), Used.end()));
-    appendToCompilerUsed(M, std::vector<GlobalValue *>(CompilerUsed.begin(),
-                                                       CompilerUsed.end()));
+    appendToUsed(M, Used);
+    appendToCompilerUsed(M, CompilerUsed);
 
     for (auto P : FunctionAliases)
       P.first->setIndirectSymbol(