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[ARM] Deliberately prevent inline asm in low overhead loops. NFC

Authored by dmgreen on Nov 11 2020, 6:51 AM.



This was already something that was handled by one of the "else" branches in maybeLoweredToCall, so this patch is an NFC but makes it explicit and adds a test. We may in the future want to support this under certain situations but for the moment just don't try and create low overhead loops with inline asm in them.

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dmgreen created this revision.Nov 11 2020, 6:51 AM
dmgreen requested review of this revision.Nov 11 2020, 6:51 AM
samparker accepted this revision.Nov 11 2020, 6:53 AM

Explicit sounds good.

This revision is now accepted and ready to land.Nov 11 2020, 6:53 AM