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70046438d0
There's an assert in LUI+SH*ADD+ADDI materialization that makes sure the lower 12 bits aren't zero since that case should have been handled as LUI+ADDI+SH*ADD. But nothing prevented the LUI+SH*ADD+ADDI checks from running after the earlier code handled it. The sequence would be the same length or longer so it wouldn't replace the earlier sequence, but the assert happened before that was checked. The vector holding the sequence also wasn't reset before the second check so that guaranteed the sequence would never be found to be shorter. This patch fixes this by only trying the second expansion when the earlier fails. Fixes PR54812. Reviewed By: benshi001 Differential Revision: https://reviews.llvm.org/D123406 |
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