[PATCH] D121277: [MachineSink] Check block prologue does not clobber uses

[Ruiling, Song via Phabricator via llvm-commits]

ruiling accepted this revision.
ruiling added a comment.

To the best of my knowledge, this should work. But please wait one or two days in case others have more comment. Please also update commit message before push.



================
Comment at: llvm/lib/CodeGen/MachineSink.cpp:1332
+            return true;
+        }
+      }
----------------
```
auto *DefOp = PI->findRegisterDefOperand(...);
if (DefOp && !DefOp->isDead())
  return true;
```


Repository:
  rG LLVM Github Monorepo

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https://reviews.llvm.org/D121277