Model vld2 / vst2 with reg_sequence.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103411 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/ARM/ARMISelDAGToDAG.cpp b/lib/Target/ARM/ARMISelDAGToDAG.cpp
index da962e1..abc02e2 100644
--- a/lib/Target/ARM/ARMISelDAGToDAG.cpp
+++ b/lib/Target/ARM/ARMISelDAGToDAG.cpp
@@ -172,9 +172,17 @@
char ConstraintCode,
std::vector<SDValue> &OutOps);
- /// PairDRegs - Insert a pair of double registers into an implicit def to
- /// form a quad register.
+ /// PairDRegs - Form a quad register from a pair of D registers.
+ ///
SDNode *PairDRegs(EVT VT, SDValue V0, SDValue V1);
+
+ /// PairDRegs - Form a quad register pair from a pair of Q registers.
+ ///
+ SDNode *PairQRegs(EVT VT, SDValue V0, SDValue V1);
+
+ /// QuadDRegs - Form a quad register pair from a quad of D registers.
+ ///
+ SDNode *QuadDRegs(EVT VT, SDValue V0, SDValue V1, SDValue V2, SDValue V3);
};
}
@@ -942,8 +950,8 @@
return NULL;
}
-/// PairDRegs - Insert a pair of double registers into an implicit def to
-/// form a quad register.
+/// PairDRegs - Form a quad register from a pair of D registers.
+///
SDNode *ARMDAGToDAGISel::PairDRegs(EVT VT, SDValue V0, SDValue V1) {
DebugLoc dl = V0.getNode()->getDebugLoc();
SDValue SubReg0 = CurDAG->getTargetConstant(ARM::DSUBREG_0, MVT::i32);
@@ -960,6 +968,29 @@
VT, SDValue(Pair, 0), V1, SubReg1);
}
+/// PairDRegs - Form a quad register pair from a pair of Q registers.
+///
+SDNode *ARMDAGToDAGISel::PairQRegs(EVT VT, SDValue V0, SDValue V1) {
+ DebugLoc dl = V0.getNode()->getDebugLoc();
+ SDValue SubReg0 = CurDAG->getTargetConstant(ARM::QSUBREG_0, MVT::i32);
+ SDValue SubReg1 = CurDAG->getTargetConstant(ARM::QSUBREG_1, MVT::i32);
+ const SDValue Ops[] = { V0, SubReg0, V1, SubReg1 };
+ return CurDAG->getMachineNode(TargetOpcode::REG_SEQUENCE, dl, VT, Ops, 4);
+}
+
+/// QuadDRegs - Form a octo register from a quad of D registers.
+///
+SDNode *ARMDAGToDAGISel::QuadDRegs(EVT VT, SDValue V0, SDValue V1,
+ SDValue V2, SDValue V3) {
+ DebugLoc dl = V0.getNode()->getDebugLoc();
+ SDValue SubReg0 = CurDAG->getTargetConstant(ARM::DSUBREG_0, MVT::i32);
+ SDValue SubReg1 = CurDAG->getTargetConstant(ARM::DSUBREG_1, MVT::i32);
+ SDValue SubReg2 = CurDAG->getTargetConstant(ARM::DSUBREG_2, MVT::i32);
+ SDValue SubReg3 = CurDAG->getTargetConstant(ARM::DSUBREG_3, MVT::i32);
+ const SDValue Ops[] = { V0, SubReg0, V1, SubReg1, V2, SubReg2, V3, SubReg3 };
+ return CurDAG->getMachineNode(TargetOpcode::REG_SEQUENCE, dl, VT, Ops, 8);
+}
+
/// GetNEONSubregVT - Given a type for a 128-bit NEON vector, return the type
/// for a 64-bit subregister of the vector.
static EVT GetNEONSubregVT(EVT VT) {
@@ -1028,9 +1059,24 @@
Chain = SDValue(VLd, 2 * NumVecs);
// Combine the even and odd subregs to produce the result.
- for (unsigned Vec = 0; Vec < NumVecs; ++Vec) {
- SDNode *Q = PairDRegs(VT, SDValue(VLd, 2*Vec), SDValue(VLd, 2*Vec+1));
- ReplaceUses(SDValue(N, Vec), SDValue(Q, 0));
+ if (llvm::ModelWithRegSequence()) {
+ if (NumVecs == 1) {
+ SDNode *Q = PairDRegs(VT, SDValue(VLd, 0), SDValue(VLd, 1));
+ ReplaceUses(SDValue(N, 0), SDValue(Q, 0));
+ } else {
+ SDValue QQ = SDValue(QuadDRegs(MVT::v4i64,
+ SDValue(VLd, 0), SDValue(VLd, 1),
+ SDValue(VLd, 2), SDValue(VLd, 3)), 0);
+ SDValue Q0 = CurDAG->getTargetExtractSubreg(ARM::QSUBREG_0, dl, VT, QQ);
+ SDValue Q1 = CurDAG->getTargetExtractSubreg(ARM::QSUBREG_1, dl, VT, QQ);
+ ReplaceUses(SDValue(N, 0), Q0);
+ ReplaceUses(SDValue(N, 1), Q1);
+ }
+ } else {
+ for (unsigned Vec = 0; Vec < NumVecs; ++Vec) {
+ SDNode *Q = PairDRegs(VT, SDValue(VLd, 2*Vec), SDValue(VLd, 2*Vec+1));
+ ReplaceUses(SDValue(N, Vec), SDValue(Q, 0));
+ }
}
} else {
// Otherwise, quad registers are loaded with two separate instructions,
@@ -1118,17 +1164,40 @@
// Quad registers are directly supported for VST1 and VST2,
// storing pairs of D regs.
unsigned Opc = QOpcodes0[OpcodeIndex];
- for (unsigned Vec = 0; Vec < NumVecs; ++Vec) {
+ if (llvm::ModelWithRegSequence() && NumVecs == 2) {
+ // First extract the quad D registers.
+ SDValue Q0 = N->getOperand(3);
+ SDValue Q1 = N->getOperand(4);
+
+ // Form a QQ register.
+ SDValue QQ = SDValue(PairQRegs(MVT::v4i64, Q0, Q1), 0);
+
+ // Now extract the D registers back out.
Ops.push_back(CurDAG->getTargetExtractSubreg(ARM::DSUBREG_0, dl, RegVT,
- N->getOperand(Vec+3)));
+ QQ));
Ops.push_back(CurDAG->getTargetExtractSubreg(ARM::DSUBREG_1, dl, RegVT,
- N->getOperand(Vec+3)));
+ QQ));
+ Ops.push_back(CurDAG->getTargetExtractSubreg(ARM::DSUBREG_2, dl, RegVT,
+ QQ));
+ Ops.push_back(CurDAG->getTargetExtractSubreg(ARM::DSUBREG_3, dl, RegVT,
+ QQ));
+ Ops.push_back(Pred);
+ Ops.push_back(Reg0); // predicate register
+ Ops.push_back(Chain);
+ return CurDAG->getMachineNode(Opc, dl, MVT::Other, Ops.data(), 5 + 4);
+ } else {
+ for (unsigned Vec = 0; Vec < NumVecs; ++Vec) {
+ Ops.push_back(CurDAG->getTargetExtractSubreg(ARM::DSUBREG_0, dl, RegVT,
+ N->getOperand(Vec+3)));
+ Ops.push_back(CurDAG->getTargetExtractSubreg(ARM::DSUBREG_1, dl, RegVT,
+ N->getOperand(Vec+3)));
+ }
+ Ops.push_back(Pred);
+ Ops.push_back(Reg0); // predicate register
+ Ops.push_back(Chain);
+ return CurDAG->getMachineNode(Opc, dl, MVT::Other, Ops.data(),
+ 5 + 2 * NumVecs);
}
- Ops.push_back(Pred);
- Ops.push_back(Reg0); // predicate register
- Ops.push_back(Chain);
- return CurDAG->getMachineNode(Opc, dl, MVT::Other, Ops.data(),
- 5 + 2 * NumVecs);
}
// Otherwise, quad registers are stored with two separate instructions,