================
@@ -11482,6 +11482,30 @@ SDValue PPCTargetLowering::LowerINTRINSIC_VOID(SDValue
Op,
return DAG.getStore(DAG.getEntryNode(), DL, Op.getOperand(ArgStart + 2),
Op.getOperand(ArgStart + 1), MachinePointerInfo());
}
+ case Intrinsic::ppc_amo_stwat:
+ case Intrinsic::ppc_amo_stdat: {
+ SDLoc dl(Op);
+ SDValue Chain = Op.getOperand(0);
+ SDValue Ptr = Op.getOperand(ArgStart + 1);
+ SDValue Val = Op.getOperand(ArgStart + 2);
+ SDValue FC = Op.getOperand(ArgStart + 3);
+
+ bool IsStwat =
+ Op.getConstantOperandVal(ArgStart) == Intrinsic::ppc_amo_stwat;
+ if (isa<ConstantSDNode>(Val)) {
+ MVT VT = IsStwat ? MVT::i32 : MVT::i64;
+ MachineFunction &MF = DAG.getMachineFunction();
+ MachineRegisterInfo &MRI = MF.getRegInfo();
+ Register ValReg = MRI.createVirtualRegister(getRegClassFor(VT));
+
+ // Materialize constant Val using CopyToReg/CopyFromReg.
+ SDValue CopyChain = DAG.getCopyToReg(Chain, dl, ValReg, Val);
+ Val = DAG.getCopyFromReg(CopyChain, dl, ValReg, VT);
+ }
----------------
RolandF77 wrote:
I haven't ever seen code like this. Constants are usually handled without extra
code. Is this because of using a machine node?
https://github.com/llvm/llvm-project/pull/170933
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