Have the bitcode reader/writer just use FPMathOperator's fast math enum directly

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169710 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Bitcode/Writer/BitcodeWriter.cpp b/lib/Bitcode/Writer/BitcodeWriter.cpp
index d616eda..f2fe0ae 100644
--- a/lib/Bitcode/Writer/BitcodeWriter.cpp
+++ b/lib/Bitcode/Writer/BitcodeWriter.cpp
@@ -552,15 +552,15 @@
   } else if (const FPMathOperator *FPMO =
              dyn_cast<const FPMathOperator>(V)) {
     if (FPMO->hasUnsafeAlgebra())
-      Flags |= 1 << bitc::FMF_UNSAFE_ALGEBRA;
+      Flags |= FPMathOperator::UnsafeAlgebra;
     if (FPMO->hasNoNaNs())
-      Flags |= 1 << bitc::FMF_NO_NANS;
+      Flags |= FPMathOperator::NoNaNs;
     if (FPMO->hasNoInfs())
-      Flags |= 1 << bitc::FMF_NO_INFS;
+      Flags |= FPMathOperator::NoInfs;
     if (FPMO->hasNoSignedZeros())
-      Flags |= 1 << bitc::FMF_NO_SIGNED_ZEROS;
+      Flags |= FPMathOperator::NoSignedZeros;
     if (FPMO->hasAllowReciprocal())
-      Flags |= 1 << bitc::FMF_ALLOW_RECIPROCAL;
+      Flags |= FPMathOperator::AllowReciprocal;
   }
 
   return Flags;