================
@@ -1421,6 +1424,35 @@ void DAGTypeLegalizer::SplitVectorResult(SDNode *N,
unsigned ResNo) {
SetSplitVector(SDValue(N, ResNo), Lo, Hi);
}
+void DAGTypeLegalizer::SplitVecRes_ATOMIC_LOAD(AtomicSDNode *LD) {
+ SDLoc dl(LD);
+
+ EVT MemoryVT = LD->getMemoryVT();
+ unsigned NumElts = MemoryVT.getVectorMinNumElements();
+
+ EVT IntMemoryVT = EVT::getVectorVT(*DAG.getContext(), MVT::i16, NumElts);
+ EVT ElemVT =
+ EVT::getVectorVT(*DAG.getContext(), MemoryVT.getVectorElementType(), 1);
+
+ // Create a single atomic to load all the elements at once.
+ SDValue Atomic =
+ DAG.getAtomic(ISD::ATOMIC_LOAD, dl, IntMemoryVT, IntMemoryVT,
+ LD->getChain(), LD->getBasePtr(), LD->getMemOperand());
+
+ // Instead of splitting, put all the elements back into a vector.
+ SmallVector<SDValue, 4> Ops;
+ for (unsigned i = 0; i < NumElts; ++i) {
+ SDValue Elt = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::i16, Atomic,
+ DAG.getVectorIdxConstant(i, dl));
+ Elt = DAG.getBitcast(ElemVT, Elt);
+ Ops.push_back(Elt);
+ }
+ SDValue Concat = DAG.getNode(ISD::CONCAT_VECTORS, dl, MemoryVT, Ops);
+
+ ReplaceValueWith(SDValue(LD, 0), Concat);
----------------
jofrn wrote:
I'm talking about chain uses of Lo and Hi. The atomic_load lowering contains
this, which looks to be associating the values:
` Ch = DAG.getNode(ISD::TokenFactor, dl, MVT::Other, Lo.getValue(1),
Hi.getValue(1));`
However, Lo and Hi are uses from getLoad/getAtomicLoad, but getAtomicLoad does
not have the chain that TokenFactor wants.
https://github.com/llvm/llvm-project/pull/120640
_______________________________________________
llvm-branch-commits mailing list
llvm-branch-commits@lists.llvm.org
https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-branch-commits
