Add vmov.f32 to materialize f32 immediate splats which cannot be handled by

integer variants. rdar://10437054

llvm-svn: 144608

1 files changed, 11 insertions, 0 deletions

diff --git a/llvm/lib/Target/ARM/ARMISelLowering.cpp b/llvm/lib/Target/ARM/ARMISelLowering.cpp
index b55ef700f5c..e35a570b5e4 100644
--- a/llvm/lib/Target/ARM/ARMISelLowering.cpp
+++ b/llvm/lib/Target/ARM/ARMISelLowering.cpp
@@ -912,6 +912,7 @@ const char *ARMTargetLowering::getTargetNodeName(unsigned Opcode) const {
   case ARMISD::VGETLANEs:     return "ARMISD::VGETLANEs";
   case ARMISD::VMOVIMM:       return "ARMISD::VMOVIMM";
   case ARMISD::VMVNIMM:       return "ARMISD::VMVNIMM";
+  case ARMISD::VMOVFPIMM:     return "ARMISD::VMOVFPIMM";
   case ARMISD::VDUP:          return "ARMISD::VDUP";
   case ARMISD::VDUPLANE:      return "ARMISD::VDUPLANE";
   case ARMISD::VEXT:          return "ARMISD::VEXT";
@@ -3986,6 +3987,16 @@ SDValue ARMTargetLowering::LowerBUILD_VECTOR(SDValue Op, SelectionDAG &DAG,
         SDValue Vmov = DAG.getNode(ARMISD::VMVNIMM, dl, VmovVT, Val);
         return DAG.getNode(ISD::BITCAST, dl, VT, Vmov);
       }
+
+      // Use vmov.f32 to materialize other v2f32 and v4f32 splats.
+      if (VT == MVT::v2f32 || VT == MVT::v4f32) {
+        ConstantFPSDNode *C = cast<ConstantFPSDNode>(Op.getOperand(0));
+        int ImmVal = ARM_AM::getFP32Imm(C->getValueAPF());
+        if (ImmVal != -1) {
+          SDValue Val = DAG.getTargetConstant(ImmVal, MVT::i32);
+          return DAG.getNode(ARMISD::VMOVFPIMM, dl, VT, Val);
+        }
+      }
     }
   }