[NVPTX] Silence a GCC warning found by the buildbots

The cast to NVPTXTargetLowering was missing a 'const', but let's
just access the right pointer through the subtarget anyway.

llvm-svn: 213793

diff --git a/llvm/lib/Target/NVPTX/NVPTXISelDAGToDAG.cpp b/llvm/lib/Target/NVPTX/NVPTXISelDAGToDAG.cpp
index aeda71f..05205fb 100644 (file)
--- a/llvm/lib/Target/NVPTX/NVPTXISelDAGToDAG.cpp
+++ b/llvm/lib/Target/NVPTX/NVPTXISelDAGToDAG.cpp
@@ -98,7 +98,7 @@ bool NVPTXDAGToDAGISel::useF32FTZ() const {
 }
 
 bool NVPTXDAGToDAGISel::allowFMA() const {
-  const NVPTXTargetLowering *TL = (NVPTXTargetLowering *)getTargetLowering();
+  const NVPTXTargetLowering *TL = Subtarget.getTargetLowering();
   return TL->allowFMA(*MF, OptLevel);
 }