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Commit 0c756c59 authored by Fangrui Song's avatar Fangrui Song Committed by Tobias Hieta
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[ARM] Fix abs overflow when encoding instructions like strb r1, [r0], #-0 

Tested by llvm/test/MC/ARM/basic-thumb2-instructions.s.
Caught by newer -fsanitize=signed-integer-overflow (D156821).

(cherry picked from commit d8900f66)
parent 3444abf2
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