================
@@ -1968,6 +1968,44 @@ GCNTTIImpl::instCombineIntrinsic(InstCombiner &IC,
IntrinsicInst &II) const {
Result = scalbn(Result, Scale, RoundingMode::NearestTiesToEven);
return IC.replaceInstUsesWith(II, ConstantFP::get(Src->getType(), Result));
}
+ case Intrinsic::amdgcn_sdot2:
+ case Intrinsic::amdgcn_udot2:
+ case Intrinsic::amdgcn_sdot4:
+ case Intrinsic::amdgcn_udot4:
+ case Intrinsic::amdgcn_sdot8:
+ case Intrinsic::amdgcn_udot8: {
+ if (!match(II.getArgOperand(3), m_Zero()) || !II.hasOneUse())
+ break;
+
+ const APInt *Acc;
+ if (!match(II.getArgOperand(2), m_APInt(Acc)))
+ break;
+
+ auto *AccumUser = dyn_cast<BinaryOperator>(II.user_back());
+ if (!AccumUser)
----------------
harrisonGPU wrote:
This is already guarded by II.hasOneUse() above, so user_back() cannot be
called when there are no users. I added a no use test called `sdot4_no_use`
https://github.com/llvm/llvm-project/pull/225002
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