R600/SI: Allow using f32 rcp / rsq when denormals not handled.

These are precise enough to use for OpenCL unless denormals
are handled.

llvm-svn: 213107
diff --git a/llvm/lib/Target/R600/SIISelLowering.h b/llvm/lib/Target/R600/SIISelLowering.h
index aa09d2c..9e9a0b0 100644
--- a/llvm/lib/Target/R600/SIISelLowering.h
+++ b/llvm/lib/Target/R600/SIISelLowering.h
@@ -27,6 +27,7 @@
                                SelectionDAG &DAG) const;
   SDValue LowerLOAD(SDValue Op, SelectionDAG &DAG) const;
   SDValue LowerSELECT(SDValue Op, SelectionDAG &DAG) const;
+  SDValue LowerFastFDIV(SDValue Op, SelectionDAG &DAG) const;
   SDValue LowerFDIV32(SDValue Op, SelectionDAG &DAG) const;
   SDValue LowerFDIV64(SDValue Op, SelectionDAG &DAG) const;
   SDValue LowerFDIV(SDValue Op, SelectionDAG &DAG) const;