[llvm] [AMDGPU] Add wait states between different MFMAs sharing an accumulator (PR #218363)

[Shilei Tian via llvm-commits]

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@@ -3164,6 +3164,21 @@ int GCNHazardRecognizer::checkMAIHazards908(MachineInstr *MI) const {
   return WaitStatesNeeded;
 }
 
+/// \returns the non-mac, AGPR form of MFMA \p Opc.
+static unsigned getMFMANonMacAGPRFormOp(unsigned Opc) {
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shiltian wrote:

What does "NonMac" mean here?

https://github.com/llvm/llvm-project/pull/218363