[llvm] [polly] [SCEVExp] Use Builder.CreateBinOp in InsertBinOp. (PR #154148)

[Florian Hahn via llvm-commits]

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@@ -648,6 +650,18 @@ void IslNodeBuilder::createForParallel(__isl_take isl_ast_node *For) {
   }
   IDToValue[IteratorID] = IV;
 
+  // Also update OutsideLoopIterations to use values from the subfunction.
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fhahn wrote:

@Meinersbur It looks like Polly is expanding SCEVs from one function and moving/inserting them in another function, which can cause issues when we simplify to a value from the original function, which cannot be used in the different function.

This is an attempt to fix up after the fact, not sure if there's a better way to do this.

https://github.com/llvm/llvm-project/pull/154148