Add ISD::FROUND for libm round()

All libm floating-point rounding functions, except for round(), had their own
ISD nodes. Recent PowerPC cores have an instruction for round(), and so here I'm
adding ISD::FROUND so that round() can be custom lowered as well.

For the most part, this is straightforward. I've added an intrinsic
and a matching ISD node just like those for nearbyint() and friends. The
SelectionDAG pattern I've named frnd (because ISD::FP_ROUND has already claimed
fround).

This will be used by the PowerPC backend in a follow-up commit.

llvm-svn: 187926

1 files changed, 1 insertions, 0 deletions

diff --git a/llvm/lib/CodeGen/SelectionDAG/SelectionDAGDumper.cpp b/llvm/lib/CodeGen/SelectionDAG/SelectionDAGDumper.cpp
index d8ee221cb46..47bab32787b 100644
--- a/llvm/lib/CodeGen/SelectionDAG/SelectionDAGDumper.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/SelectionDAGDumper.cpp
@@ -142,6 +142,7 @@ std::string SDNode::getOperationName(const SelectionDAG *G) const {
   case ISD::FCEIL:                      return "fceil";
   case ISD::FRINT:                      return "frint";
   case ISD::FNEARBYINT:                 return "fnearbyint";
+  case ISD::FROUND:                     return "fround";
   case ISD::FEXP:                       return "fexp";
   case ISD::FEXP2:                      return "fexp2";
   case ISD::FLOG:                       return "flog";