[LegalizeDAG][X86] Add support for turning STRICT_FADD/SUB/MUL/DIV into libcalls. Use it for fp128 on x86-64.

This requires a minor hack for f32/f64 strict fadd/fsub to avoid
turning those into libcalls.

1 files changed, 4 insertions, 0 deletions

diff --git a/llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp b/llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
index ec099823c47..6602ffed020 100644
--- a/llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
@@ -4019,6 +4019,7 @@ void SelectionDAGLegalize::ConvertNodeToLibcall(SDNode *Node) {
                        RTLIB::LLRINT_PPCF128, Results);
     break;
   case ISD::FDIV:
+  case ISD::STRICT_FDIV:
     ExpandFPLibCall(Node, RTLIB::DIV_F32, RTLIB::DIV_F64,
                     RTLIB::DIV_F80, RTLIB::DIV_F128,
                     RTLIB::DIV_PPCF128, Results);
@@ -4036,11 +4037,13 @@ void SelectionDAGLegalize::ConvertNodeToLibcall(SDNode *Node) {
                     RTLIB::FMA_PPCF128, Results);
     break;
   case ISD::FADD:
+  case ISD::STRICT_FADD:
     ExpandFPLibCall(Node, RTLIB::ADD_F32, RTLIB::ADD_F64,
                     RTLIB::ADD_F80, RTLIB::ADD_F128,
                     RTLIB::ADD_PPCF128, Results);
     break;
   case ISD::FMUL:
+  case ISD::STRICT_FMUL:
     ExpandFPLibCall(Node, RTLIB::MUL_F32, RTLIB::MUL_F64,
                     RTLIB::MUL_F80, RTLIB::MUL_F128,
                     RTLIB::MUL_PPCF128, Results);
@@ -4058,6 +4061,7 @@ void SelectionDAGLegalize::ConvertNodeToLibcall(SDNode *Node) {
     break;
   }
   case ISD::FSUB:
+  case ISD::STRICT_FSUB:
     ExpandFPLibCall(Node, RTLIB::SUB_F32, RTLIB::SUB_F64,
                     RTLIB::SUB_F80, RTLIB::SUB_F128,
                     RTLIB::SUB_PPCF128, Results);