[llvm] [MacroFusion] Restricts pairs to have SDep::Data dependency only (PR #203793)

[Pengcheng Wang via llvm-commits]

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@@ -204,8 +204,8 @@ bool MacroFusion::scheduleAdjacentImpl(ScheduleDAGInstrs &DAG, SUnit &AnchorSU)
 
   // Explorer for fusion candidates among the dependencies of the anchor instr.
   for (SDep &Dep : AnchorSU.Preds) {
-    // Ignore dependencies other than data or strong ordering.
-    if (Dep.isWeak() || isHazard(Dep))
+    // Ignore dependencies other than data
+    if (Dep.getKind() != SDep::Data)
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wangpc-pp wrote:

There are other places that have these checks, we should also change them.

https://github.com/llvm/llvm-project/pull/203793