Add codegen support for NEON vst2 intrinsics with 128-bit vectors.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@83482 91177308-0d34-0410-b5e6-96231b3b80d8

3 files changed, 47 insertions, 7 deletions

diff --git a/lib/Target/ARM/ARMISelDAGToDAG.cpp b/lib/Target/ARM/ARMISelDAGToDAG.cpp
index a9b86f0..b26a172 100644
--- a/lib/Target/ARM/ARMISelDAGToDAG.cpp
+++ b/lib/Target/ARM/ARMISelDAGToDAG.cpp
@@ -1563,17 +1563,41 @@ SDNode *ARMDAGToDAGISel::Select(SDValue Op) {
       SDValue MemAddr, MemUpdate, MemOpc;
       if (!SelectAddrMode6(Op, N->getOperand(2), MemAddr, MemUpdate, MemOpc))
         return NULL;
-      switch (N->getOperand(3).getValueType().getSimpleVT().SimpleTy) {
+      VT = N->getOperand(3).getValueType();
+      if (VT.is64BitVector()) {
+        switch (VT.getSimpleVT().SimpleTy) {
+        default: llvm_unreachable("unhandled vst2 type");
+        case MVT::v8i8:  Opc = ARM::VST2d8; break;
+        case MVT::v4i16: Opc = ARM::VST2d16; break;
+        case MVT::v2f32:
+        case MVT::v2i32: Opc = ARM::VST2d32; break;
+        }
+        SDValue Chain = N->getOperand(0);
+        const SDValue Ops[] = { MemAddr, MemUpdate, MemOpc,
+                                N->getOperand(3), N->getOperand(4), Chain };
+        return CurDAG->getMachineNode(Opc, dl, MVT::Other, Ops, 6);
+      }
+      // Quad registers are stored as pairs of double registers.
+      EVT RegVT;
+      switch (VT.getSimpleVT().SimpleTy) {
       default: llvm_unreachable("unhandled vst2 type");
-      case MVT::v8i8:  Opc = ARM::VST2d8; break;
-      case MVT::v4i16: Opc = ARM::VST2d16; break;
-      case MVT::v2f32:
-      case MVT::v2i32: Opc = ARM::VST2d32; break;
+      case MVT::v16i8: Opc = ARM::VST2q8; RegVT = MVT::v8i8; break;
+      case MVT::v8i16: Opc = ARM::VST2q16; RegVT = MVT::v4i16; break;
+      case MVT::v4f32: Opc = ARM::VST2q32; RegVT = MVT::v2f32; break;
+      case MVT::v4i32: Opc = ARM::VST2q32; RegVT = MVT::v2i32; break;
       }
       SDValue Chain = N->getOperand(0);
+      SDValue D0 = CurDAG->getTargetExtractSubreg(ARM::DSUBREG_0, dl, RegVT,
+                                                  N->getOperand(3));
+      SDValue D1 = CurDAG->getTargetExtractSubreg(ARM::DSUBREG_1, dl, RegVT,
+                                                  N->getOperand(3));
+      SDValue D2 = CurDAG->getTargetExtractSubreg(ARM::DSUBREG_0, dl, RegVT,
+                                                  N->getOperand(4));
+      SDValue D3 = CurDAG->getTargetExtractSubreg(ARM::DSUBREG_1, dl, RegVT,
+                                                  N->getOperand(4));
       const SDValue Ops[] = { MemAddr, MemUpdate, MemOpc,
-                              N->getOperand(3), N->getOperand(4), Chain };
-      return CurDAG->getMachineNode(Opc, dl, MVT::Other, Ops, 6);
+                              D0, D1, D2, D3, Chain };
+      return CurDAG->getMachineNode(Opc, dl, MVT::Other, Ops, 8);
     }
 
     case Intrinsic::arm_neon_vst3: {
diff --git a/lib/Target/ARM/ARMInstrNEON.td b/lib/Target/ARM/ARMInstrNEON.td
index 75ff78a..59cbfc5 100644
--- a/lib/Target/ARM/ARMInstrNEON.td
+++ b/lib/Target/ARM/ARMInstrNEON.td
@@ -316,11 +316,20 @@ let mayStore = 1, hasExtraSrcRegAllocReq = 1 in {
 class VST2D<string OpcodeStr>
   : NLdSt<(outs), (ins addrmode6:$addr, DPR:$src1, DPR:$src2), IIC_VST,
           !strconcat(OpcodeStr, "\t\\{$src1,$src2\\}, $addr"), "", []>;
+class VST2Q<string OpcodeStr>
+  : NLdSt<(outs), (ins addrmode6:$addr, DPR:$src1, DPR:$src2, DPR:$src3,
+                   DPR:$src4), IIC_VST,
+          !strconcat(OpcodeStr, "\t\\{$src1,$src2,$src3,$src4\\}, $addr"),
+          "", []>;
 
 def  VST2d8   : VST2D<"vst2.8">;
 def  VST2d16  : VST2D<"vst2.16">;
 def  VST2d32  : VST2D<"vst2.32">;
 
+def  VST2q8   : VST2Q<"vst2.8">;
+def  VST2q16  : VST2Q<"vst2.16">;
+def  VST2q32  : VST2Q<"vst2.32">;
+
 //   VST3     : Vector Store (multiple 3-element structures)
 class VST3D<string OpcodeStr>
   : NLdSt<(outs), (ins addrmode6:$addr, DPR:$src1, DPR:$src2, DPR:$src3),
diff --git a/lib/Target/ARM/NEONPreAllocPass.cpp b/lib/Target/ARM/NEONPreAllocPass.cpp
index 1232f89..b121ac0 100644
--- a/lib/Target/ARM/NEONPreAllocPass.cpp
+++ b/lib/Target/ARM/NEONPreAllocPass.cpp
@@ -129,6 +129,13 @@ static bool isNEONMultiRegOp(int Opcode, unsigned &FirstOpnd, unsigned &NumRegs,
     NumRegs = 2;
     return true;
 
+  case ARM::VST2q8:
+  case ARM::VST2q16:
+  case ARM::VST2q32:
+    FirstOpnd = 3;
+    NumRegs = 4;
+    return true;
+
   case ARM::VST3d8:
   case ARM::VST3d16:
   case ARM::VST3d32: