[clang] [llvm] [SCCP] Infer return attributes in SCCP as well (PR #106732)

[Yingwei Zheng via cfe-commits]

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@@ -354,6 +354,36 @@ bool SCCPSolver::removeNonFeasibleEdges(BasicBlock *BB, DomTreeUpdater &DTU,
   return true;
 }
 
+void SCCPSolver::inferReturnAttributes() const {
+  for (const auto &I : getTrackedRetVals()) {
+    Function *F = I.first;
+    const ValueLatticeElement &ReturnValue = I.second;
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dtcxzyw wrote:

```suggestion
  for (const auto &[F, ReturnValue] : getTrackedRetVals()) {
```

https://github.com/llvm/llvm-project/pull/106732