[llvm] AMDGPU: fix isSafeToSink expecting exactly one predecessor (PR #89224)

[Jay Foad via llvm-commits]

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@@ -66,6 +66,19 @@ void GenericCycle<ContextT>::getExitBlocks(
   }
 }
 
+template <typename ContextT>
+void GenericCycle<ContextT>::getExitingBlocks(
+    SmallVectorImpl<BlockT *> &TmpStorage) const {
+  TmpStorage.clear();
+
+  for (BlockT *Block : blocks()) {
+    for (BlockT *Succ : successors(Block)) {
+      if (!contains(Succ))
+        TmpStorage.push_back(Block);
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jayfoad wrote:

`break` from the inner loop here.

https://github.com/llvm/llvm-project/pull/89224