[llvm] [LoopFusion] Fix sink instructions (PR #147501)

[Michael Kruse via llvm-commits]

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@@ -1176,6 +1176,27 @@ struct LoopFuser {
     return true;
   }
 
+  // This function fixes sunk PHI nodes after fusion.
+  void fixPHINodes(SmallVector<Instruction *, 4> &SafeToSink,
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Meinersbur wrote:

> So, I should be removing `const` qualifier...

`const` refers to the qualifiers of `this`, which with `static` does not exist anymore, so indeed, the consequence would be to remove `const`.

I don't care that much, so I LGTM it already. Keep it non-static if you think it makes more sense.

https://github.com/llvm/llvm-project/pull/147501