1 files changed, 2 insertions, 1 deletions
diff --git a/llvm/lib/Support/APInt.cpp b/llvm/lib/Support/APInt.cpp
index ba2b2c1..b19de75 100644
--- a/llvm/lib/Support/APInt.cpp
+++ b/llvm/lib/Support/APInt.cpp
@@ -25,6 +25,7 @@
 #include "llvm/Support/MathExtras.h"
 #include "llvm/Support/raw_ostream.h"
 #include <cmath>
+#include <optional>
 
 using namespace llvm;
 
@@ -2770,7 +2771,7 @@ APInt llvm::APIntOps::RoundingSDiv(const APInt &A, const APInt &B,
   llvm_unreachable("Unknown APInt::Rounding enum");
 }
 
-Optional<APInt>
+std::optional<APInt>
 llvm::APIntOps::SolveQuadraticEquationWrap(APInt A, APInt B, APInt C,
                                            unsigned RangeWidth) {
   unsigned CoeffWidth = A.getBitWidth();