================
@@ -707,7 +723,40 @@ void WaitcntBrackets::updateByEvent(const SIInstrInfo *TII,
(TII->isDS(Inst) || TII->mayWriteLDSThroughDMA(Inst))) {
// MUBUF and FLAT LDS DMA operations need a wait on vmcnt before LDS
// written can be accessed. A load from LDS to VMEM does not need a wait.
- setRegScore(SQ_MAX_PGM_VGPRS + EXTRA_VGPR_LDS, T, CurrScore);
+ unsigned Slot = 0;
+ for (const auto *MemOp : Inst.memoperands()) {
+ if (!MemOp->isStore() ||
+ MemOp->getAddrSpace() != AMDGPUAS::LOCAL_ADDRESS)
+ continue;
+ // Comparing just AA info does not guarantee memoperands are equal
+ // in general, but this is so for LDS DMA in practice.
+ auto AAI = MemOp->getAAInfo();
+ // Alias scope information gives a way to definitely identify an
+ // original memory object and practically produced in the module LDS
+ // lowering pass. If there is no scope available we will not be able
+ // to disambiguate LDS aliasing as after the module lowering all LDS
+ // is squashed into a single big object. Do not attemt to use one of
----------------
rampitec wrote:
Done
https://github.com/llvm/llvm-project/pull/74537
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