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

The pass preserved LiveStacksAnalysis but failed to preserve
LiveIntervalsAnalysis, LiveRegMatrixAnalysis, VirtRegMapAnalysis, and
SlotIndexesAnalysis under NPM. This caused these analyses to be
invalidated and recomputed, leading to incorrect behavior in subsequent
passes like VirtRegRewriter.

Fix by explicitly preserving all required analyses in the NPM version,
matching the legacy pass manager behavior.

---------

Co-authored-by: vikhegde <[email protected]>

Author: 2 people

llvm/lib/Target/AMDGPU/AMDGPURewriteAGPRCopyMFMA.cpp

@@ -32,6 +32,7 @@
 #include "llvm/CodeGen/LiveStacks.h"
 #include "llvm/CodeGen/MachineFrameInfo.h"
 #include "llvm/CodeGen/MachineFunctionPass.h"
+#include "llvm/CodeGen/SlotIndexes.h"
 #include "llvm/CodeGen/VirtRegMap.h"
 #include "llvm/InitializePasses.h"
 
@@ -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>()
+      .preserve<LiveIntervalsAnalysis>()
+      .preserve<LiveRegMatrixAnalysis>();
   return PA;
 }