Fix a logic bug when copying fast-math flags.

[oota-llvm.git] / include / llvm / IR / Operator.h

diff --git a/include/llvm/IR/Operator.h b/include/llvm/IR/Operator.h
index 762f4a75c315948e3897df7c7ed751012f6101a2..c25937c97ab0b6599c104abf48810a075ded0391 100644 (file)
--- a/include/llvm/IR/Operator.h
+++ b/include/llvm/IR/Operator.h
@@ -257,11 +257,18 @@ private:
       (B * FastMathFlags::AllowReciprocal);
   }
 
-  /// Convenience function for setting all the fast-math flags
+  /// Convenience function for setting multiple fast-math flags.
+  /// FMF is a mask of the bits to set.
   void setFastMathFlags(FastMathFlags FMF) {
     SubclassOptionalData |= FMF.Flags;
   }
 
+  /// Convenience function for copying all fast-math flags.
+  /// All values in FMF are transferred to this operator.
+  void copyFastMathFlags(FastMathFlags FMF) {
+    SubclassOptionalData = FMF.Flags;
+  }
+
 public:
   /// Test whether this operation is permitted to be
   /// algebraically transformed, aka the 'A' fast-math property.