[PATCH] D131521: [SDAG] avoid generating libcall in function with nobuiltin

[Sanjay Patel via Phabricator via llvm-commits]

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This is a potentially better alternative to D131452 <https://reviews.llvm.org/D131452> that also appears to avoid the infinite loop bug from:
https://github.com/llvm/llvm-project/issues/56403

This is again a minimal fix to minimize merging pain for the release. But if this makes sense, then we'd want to guard all of the RTLIB generation (and other libcalls?) with 'nobuiltin'?


https://reviews.llvm.org/D131521

Files:
  llvm/lib/CodeGen/SelectionDAG/LegalizeIntegerTypes.cpp
  llvm/test/CodeGen/AArch64/umulo-128-legalisation-lowering.ll

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