diff --git a/llvm/lib/Bitcode/Reader/BitcodeReader.cpp b/llvm/lib/Bitcode/Reader/BitcodeReader.cpp
index cb1a835..131151f 100644
--- a/llvm/lib/Bitcode/Reader/BitcodeReader.cpp
+++ b/llvm/lib/Bitcode/Reader/BitcodeReader.cpp
@@ -2048,15 +2048,15 @@
         } else if (isa<FPMathOperator>(I)) {
           FastMathFlags FMF;
           FMF.UnsafeAlgebra =
-            0 != (Record[OpNum] & (1 << bitc::FMF_UNSAFE_ALGEBRA));
+            0 != (Record[OpNum] & FPMathOperator::UnsafeAlgebra);
           FMF.NoNaNs =
-            0 != (Record[OpNum] & (1 << bitc::FMF_NO_NANS));
+            0 != (Record[OpNum] & FPMathOperator::NoNaNs);
           FMF.NoInfs =
-            0 != (Record[OpNum] & (1 << bitc::FMF_NO_INFS));
+            0 != (Record[OpNum] & FPMathOperator::NoInfs);
           FMF.NoSignedZeros =
-            0 != (Record[OpNum] & (1 << bitc::FMF_NO_SIGNED_ZEROS));
+            0 != (Record[OpNum] & FPMathOperator::NoSignedZeros);
           FMF.AllowReciprocal =
-            0 != (Record[OpNum] & (1 << bitc::FMF_ALLOW_RECIPROCAL));
+            0 != (Record[OpNum] & FPMathOperator::AllowReciprocal);
           if (FMF.any())
             I->setFastMathFlags(FMF);
         }