================
@@ -638,6 +643,31 @@ SDValue BPFTargetLowering::LowerDYNAMIC_STACKALLOC(SDValue
Op,
return DAG.getMergeValues(Ops, SDLoc());
}
+SDValue BPFTargetLowering::LowerADDRSPACECAST(SDValue Op,
+ SelectionDAG &DAG) const {
+ auto *ACast = dyn_cast<AddrSpaceCastSDNode>(Op);
+ const SDValue &Ptr = ACast->getOperand(0);
+ unsigned SrcAS = ACast->getSrcAddressSpace();
+ unsigned DstAS = ACast->getDestAddressSpace();
+ SDLoc DL(Op);
+
+ if (SrcAS > 0 && DstAS > 0) {
+ SmallString<64> Msg;
+ raw_svector_ostream OS(Msg);
+ OS << "Can't cast address space " << SrcAS << " to " << DstAS
+ << ": either source or destination address space has to be zero";
+ fail(DL, DAG, Msg);
----------------
eddyz87 wrote:
Actually, I think this check is no longer necessary. It remains from a previous
version, where `cast_kern` and `cast_user` instructions were used, modeled as
an address space cast at IR level. There either source or destination address
space had to be zero. Sorry for confusion, I should have removed this when
switching MR to `addr_space_cast` instruction.
https://github.com/llvm/llvm-project/pull/84410
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