[llvm] [SLP]Support revectorization of the previously vectorized scalars (PR #133091)

[Gaëtan Bossu via llvm-commits]

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@@ -4814,12 +4803,19 @@ class BoUpSLP {
         ProcessBundleMember(SD, nullptr);
       } else {
         ScheduleBundle &Bundle = *cast<ScheduleBundle>(Data);
-        for_each(Bundle.getBundle(), [](ScheduleData *SD) {
-          SD->setScheduled(/*Scheduled=*/true);
-        });
+        Bundle.setScheduled(/*Scheduled=*/true);
         LLVM_DEBUG(dbgs() << "SLP:   schedule " << Bundle << "\n");
-        for (ScheduleData *SD : Bundle.getBundle())
-          ProcessBundleMember(SD, &Bundle);
+        for (ScheduleData *SD : Bundle.getBundle()) {
+          if (ArrayRef<ScheduleBundle *> SDBundles =
+                  getScheduleBundles(SD->getInst());
+              !SDBundles.empty() &&
+              all_of(SDBundles, [&](const ScheduleBundle *SDBundle) {
+                return SDBundle->isScheduled();
+              })) {
+            SD->setScheduled(/*Scheduled=*/true);
+            ProcessBundleMember(SD, &Bundle);
+          }
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gbossu wrote:

Oh nvm, for some reason I was still checking the old diff, that does look a lot simpler now ;)

https://github.com/llvm/llvm-project/pull/133091