[llvm] [Support] Assert that DomTree nodes share parent (PR #101198)

[Nikita Popov via llvm-commits]

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@@ -526,6 +526,10 @@ bool llvm::isValidAssumeForContext(const Instruction *Inv,
     return AllowEphemerals || !isEphemeralValueOf(Inv, CxtI);
   }
 
+  // Inv and CxtI are in different functions.
+  if (Inv->getFunction() != CxtI->getFunction())
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nikic wrote:

We should check for this inside alignment-from-assumptions, not here.

https://github.com/llvm/llvm-project/pull/101198