diff --git a/src/llvm-project/llvm/lib/IR/InlineAsm.cpp b/src/llvm-project/llvm/lib/IR/InlineAsm.cpp
index fd732f9..ee30b92 100644
--- a/src/llvm-project/llvm/lib/IR/InlineAsm.cpp
+++ b/src/llvm-project/llvm/lib/IR/InlineAsm.cpp
@@ -136,14 +136,14 @@
       // Find the end of the register name.
       StringRef::iterator ConstraintEnd = std::find(I+1, E, '}');
       if (ConstraintEnd == E) return true;  // "{foo"
-      pCodes->push_back(StringRef(I, ConstraintEnd+1 - I));
+      pCodes->push_back(std::string(StringRef(I, ConstraintEnd + 1 - I)));
       I = ConstraintEnd+1;
     } else if (isdigit(static_cast<unsigned char>(*I))) { // Matching Constraint
       // Maximal munch numbers.
       StringRef::iterator NumStart = I;
       while (I != E && isdigit(static_cast<unsigned char>(*I)))
         ++I;
-      pCodes->push_back(StringRef(NumStart, I - NumStart));
+      pCodes->push_back(std::string(StringRef(NumStart, I - NumStart)));
       unsigned N = atoi(pCodes->back().c_str());
       // Check that this is a valid matching constraint!
       if (N >= ConstraintsSoFar.size() || ConstraintsSoFar[N].Type != isOutput||
@@ -179,7 +179,7 @@
     } else if (*I == '^') {
       // Multi-letter constraint
       // FIXME: For now assuming these are 2-character constraints.
-      pCodes->push_back(StringRef(I+1, 2));
+      pCodes->push_back(std::string(StringRef(I + 1, 2)));
       I += 3;
     } else if (*I == '@') {
       // Multi-letter constraint
@@ -189,11 +189,11 @@
       int N = C - '0';
       assert(N > 0 && "Found a zero letter constraint!");
       ++I;
-      pCodes->push_back(StringRef(I, N));
+      pCodes->push_back(std::string(StringRef(I, N)));
       I += N;
     } else {
       // Single letter constraint.
-      pCodes->push_back(StringRef(I, 1));
+      pCodes->push_back(std::string(StringRef(I, 1)));
       ++I;
     }
   }