Simplify boolean expressions with true and false using clang-tidy

Patch by Richard (legalize@xmission.com)

Differential Revision: http://reviews.llvm.org/D8521

llvm-svn: 232961
diff --git a/llvm/lib/Target/NVPTX/NVPTXISelDAGToDAG.cpp b/llvm/lib/Target/NVPTX/NVPTXISelDAGToDAG.cpp
index 62ae664..52c5e1b 100644
--- a/llvm/lib/Target/NVPTX/NVPTXISelDAGToDAG.cpp
+++ b/llvm/lib/Target/NVPTX/NVPTXISelDAGToDAG.cpp
@@ -78,10 +78,7 @@
     return UsePrecSqrtF32;
   } else {
     // Otherwise, use sqrt.approx if fast math is enabled
-    if (TM.Options.UnsafeFPMath)
-      return false;
-    else
-      return true;
+    return !TM.Options.UnsafeFPMath;
   }
 }