+static SDValue getFLUSHW(SDValue Op, SelectionDAG &DAG) {
+ DebugLoc dl = Op.getDebugLoc();
+ SDValue Chain = DAG.getNode(SPISD::FLUSHW,
+ dl, MVT::Other, DAG.getEntryNode());
+ return Chain;
+}
+
+static SDValue LowerFRAMEADDR(SDValue Op, SelectionDAG &DAG) {
+ MachineFrameInfo *MFI = DAG.getMachineFunction().getFrameInfo();
+ MFI->setFrameAddressIsTaken(true);
+
+ EVT VT = Op.getValueType();
+ DebugLoc dl = Op.getDebugLoc();
+ unsigned FrameReg = SP::I6;
+
+ uint64_t depth = Op.getConstantOperandVal(0);
+
+ SDValue FrameAddr;
+ if (depth == 0)
+ FrameAddr = DAG.getCopyFromReg(DAG.getEntryNode(), dl, FrameReg, VT);
+ else {
+ // flush first to make sure the windowed registers' values are in stack
+ SDValue Chain = getFLUSHW(Op, DAG);
+ FrameAddr = DAG.getCopyFromReg(Chain, dl, FrameReg, VT);
+
+ for (uint64_t i = 0; i != depth; ++i) {
+ SDValue Ptr = DAG.getNode(ISD::ADD,
+ dl, MVT::i32,
+ FrameAddr, DAG.getIntPtrConstant(56));
+ FrameAddr = DAG.getLoad(MVT::i32, dl,
+ Chain,
+ Ptr,
+ MachinePointerInfo(), false, false, 0);
+ }
+ }
+ return FrameAddr;
+}
+
+static SDValue LowerRETURNADDR(SDValue Op, SelectionDAG &DAG) {
+ MachineFrameInfo *MFI = DAG.getMachineFunction().getFrameInfo();
+ MFI->setReturnAddressIsTaken(true);
+
+ EVT VT = Op.getValueType();
+ DebugLoc dl = Op.getDebugLoc();
+ unsigned RetReg = SP::I7;
+
+ uint64_t depth = Op.getConstantOperandVal(0);
+
+ SDValue RetAddr;
+ if (depth == 0)
+ RetAddr = DAG.getCopyFromReg(DAG.getEntryNode(), dl, RetReg, VT);
+ else {
+ // flush first to make sure the windowed registers' values are in stack
+ SDValue Chain = getFLUSHW(Op, DAG);
+ RetAddr = DAG.getCopyFromReg(Chain, dl, SP::I6, VT);
+
+ for (uint64_t i = 0; i != depth; ++i) {
+ SDValue Ptr = DAG.getNode(ISD::ADD,
+ dl, MVT::i32,
+ RetAddr,
+ DAG.getIntPtrConstant((i == depth-1)?60:56));
+ RetAddr = DAG.getLoad(MVT::i32, dl,
+ Chain,
+ Ptr,
+ MachinePointerInfo(), false, false, 0);
+ }
+ }
+ return RetAddr;
+}
+