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Summary

  1. [AArch64] Fix legalization of i128 ctpop without neon (details)
Commit fb77d95022198edebde3e4cb2807eaeea2156d85 by nikita.ppv
[AArch64] Fix legalization of i128 ctpop without neon

If neon is disabled, LowerCTPOP will return SDValue() to indicate
that normal legalization should be used. However, ReplaceNodeResults
does not check for this and pushes the empty SDValue() onto the
result vector, which will subsequently result in a crash.

Differential Revision: https://reviews.llvm.org/D93825
The file was addedllvm/test/CodeGen/AArch64/ctpop-nonean.ll
The file was modifiedllvm/lib/Target/AArch64/AArch64ISelLowering.cpp