Comment # 8 on bug 1188327 from Mian Yousaf Kaukab

Please confirm that compiler inferring LDM instruction instead of LDR is
correct for ecc_swap_digits(). 

In armv7, LDR instruction can handle unaligned address whereas LDM instruction
can't handle them [1].

[1]:
https://developer.arm.com/documentation/ddi0406/c/Application-Level-Architecture/Application-Level-Memory-Model/Alignment-support/Unaligned-data-access