[llvm] [AMDGPU][NPM] Preserve analyses in AMDGPURewriteAGPRCopyMFMA for NPM (PR #170130)

[Prasoon Mishra via llvm-commits]

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@@ -659,7 +660,11 @@ AMDGPURewriteAGPRCopyMFMAPass::run(MachineFunction &MF,
   if (!Impl.run(MF))
     return PreservedAnalyses::all();
   auto PA = getMachineFunctionPassPreservedAnalyses();
-  PA.preserveSet<CFGAnalyses>();
-  PA.preserve<LiveStacksAnalysis>();
+  PA.preserveSet<CFGAnalyses>()
+      .preserve<LiveStacksAnalysis>()
+      .preserve<VirtRegMapAnalysis>()
+      .preserve<SlotIndexesAnalysis>()
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PrasoonMishra wrote:

Thanks for pointing that out. I agree the current approach isn’t ideal, but given the limitations of the pass manager right now, I’ll leave it as is.

https://github.com/llvm/llvm-project/pull/170130