[llvm-branch-commits] [llvm] [AMDGPU][InstCombine] Fold zero dot operands to accumulator (PR #225003)

[Matt Arsenault via llvm-branch-commits]

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@@ -1974,6 +1974,10 @@ GCNTTIImpl::instCombineIntrinsic(InstCombiner &IC, IntrinsicInst &II) const {
   case Intrinsic::amdgcn_udot4:
   case Intrinsic::amdgcn_sdot8:
   case Intrinsic::amdgcn_udot8: {
+    if (match(II.getArgOperand(0), m_Zero()) ||
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arsenm wrote:

If it doesn't work the canonicalize to RHS should be done separately 

https://github.com/llvm/llvm-project/pull/225003