[PATCH] D136158: [AArch64] Adjust operand sequence for Add+Sub to combine more inline shift

[Nico Weber via Phabricator via llvm-commits]

thakis added a comment.

We also bisected hangs due to this (arm64 on all of android fuchsia ios mac). It looks like you have a bunch of reproducers already, but there's one more at https://bugs.chromium.org/p/chromium/issues/detail?id=1379286#c7 if you're interested (it's just a file from boringssl – we saw this hang on many files. I'd guess, but haven't checked, that doing a bootstrap build of clang on an arm64 box would also trigger this.)

Thanks for the revert!


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  https://reviews.llvm.org/D136158/new/

https://reviews.llvm.org/D136158