diff --git a/llvm/include/llvm/LTO/legacy/LTOCodeGenerator.h b/llvm/include/llvm/LTO/legacy/LTOCodeGenerator.h
index a817969abc5821..f76cc5fbed4993 100644
--- a/llvm/include/llvm/LTO/legacy/LTOCodeGenerator.h
+++ b/llvm/include/llvm/LTO/legacy/LTOCodeGenerator.h
@@ -93,7 +93,7 @@ struct LTOCodeGenerator {
   void setFileType(CodeGenFileType FT) { FileType = FT; }
 
   void setCpu(StringRef MCpu) { this->MCpu = std::string(MCpu); }
-  void setAttr(StringRef MAttr) { this->MAttr = std::string(MAttr); }
+  void setAttrs(std::vector<std::string> MAttrs) { this->MAttrs = MAttrs; }
   void setOptLevel(unsigned OptLevel);
 
   void setShouldInternalize(bool Value) { ShouldInternalize = Value; }
@@ -223,7 +223,7 @@ struct LTOCodeGenerator {
   std::vector<std::string> CodegenOptions;
   std::string FeatureStr;
   std::string MCpu;
-  std::string MAttr;
+  std::vector<std::string> MAttrs;
   std::string NativeObjectPath;
   TargetOptions Options;
   CodeGenOpt::Level CGOptLevel = CodeGenOpt::Default;
diff --git a/llvm/lib/LTO/LTOCodeGenerator.cpp b/llvm/lib/LTO/LTOCodeGenerator.cpp
index cb30db1932596c..bdde2baffb40d6 100644
--- a/llvm/lib/LTO/LTOCodeGenerator.cpp
+++ b/llvm/lib/LTO/LTOCodeGenerator.cpp
@@ -361,7 +361,7 @@ bool LTOCodeGenerator::determineTarget() {
 
   // Construct LTOModule, hand over ownership of module and target. Use MAttr as
   // the default set of features.
-  SubtargetFeatures Features(MAttr);
+  SubtargetFeatures Features(join(MAttrs, ""));
   Features.getDefaultSubtargetFeatures(Triple);
   FeatureStr = Features.getString();
   // Set a default CPU for Darwin triples.
diff --git a/llvm/tools/llvm-lto/llvm-lto.cpp b/llvm/tools/llvm-lto/llvm-lto.cpp
index ad6b78bc46a6b8..912a88dfbd549b 100644
--- a/llvm/tools/llvm-lto/llvm-lto.cpp
+++ b/llvm/tools/llvm-lto/llvm-lto.cpp
@@ -1011,12 +1011,7 @@ int main(int argc, char **argv) {
   CodeGen.setCpu(codegen::getMCPU().c_str());
 
   CodeGen.setOptLevel(OptLevel - '0');
-
-  auto MAttrs = codegen::getMAttrs();
-  if (!MAttrs.empty()) {
-    std::string attrs = join(MAttrs, ",");
-    CodeGen.setAttr(attrs);
-  }
+  CodeGen.setAttrs(codegen::getMAttrs());
 
   if (auto FT = codegen::getExplicitFileType())
     CodeGen.setFileType(FT.getValue());
diff --git a/llvm/tools/lto/lto.cpp b/llvm/tools/lto/lto.cpp
index 81f64df403ab9b..b48bc922bc4b0b 100644
--- a/llvm/tools/lto/lto.cpp
+++ b/llvm/tools/lto/lto.cpp
@@ -146,11 +146,7 @@ DEFINE_SIMPLE_CONVERSION_FUNCTIONS(LTOModule, lto_module_t)
 // Convert the subtarget features into a string to pass to LTOCodeGenerator.
 static void lto_add_attrs(lto_code_gen_t cg) {
   LTOCodeGenerator *CG = unwrap(cg);
-  auto MAttrs = codegen::getMAttrs();
-  if (!MAttrs.empty()) {
-    std::string attrs = join(MAttrs, ",");
-    CG->setAttr(attrs);
-  }
+  CG->setAttrs(codegen::getMAttrs());
 
   if (OptLevel < '0' || OptLevel > '3')
     report_fatal_error("Optimization level must be between 0 and 3");