[llvm] [ReachingDefAnalysis] Extend the analysis to stack objects. (PR #118097)

[Craig Topper via llvm-commits]

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@@ -209,19 +235,62 @@ void ReachingDefAnalysis::processBasicBlock(
   leaveBasicBlock(MBB);
 }
 
+void ReachingDefAnalysis::printAllReachingDefs(MachineFunction &MF) {
+  dbgs() << "RDA results for " << MF.getName() << "\n";
+  int Num = 0;
+  DenseMap<MachineInstr *, int> InstToNumMap;
+  SmallPtrSet<MachineInstr *, 2> Defs;
+  for (MachineBasicBlock &MBB : MF) {
+    for (MachineInstr &MI : MBB) {
+      for (MachineOperand &MO : MI.operands()) {
+        Register Reg;
+        if (MO.isFI()) {
+          int FrameIndex = MO.getIndex();
+          Reg = Register::index2StackSlot(FrameIndex);
+        } else if (MO.isReg()) {
+          if (MO.isDef())
+            continue;
+          Reg = MO.getReg();
+          if (Reg == MCRegister::NoRegister)
+            continue;
+        } else {
+          continue;
+        }
+        Defs.clear();
+        getGlobalReachingDefs(&MI, Reg, Defs);
+        MO.print(dbgs(), TRI);
+        dbgs() << ":{ ";
+        for (MachineInstr *Def : Defs) {
+          dbgs() << InstToNumMap[Def] << " ";
+        }
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topperc wrote:

No curly braces around single line bodies

https://github.com/llvm/llvm-project/pull/118097