5.7.7.44 Thumb2-align-loop Option
The -mthumb2-align-loop option performs loop alignment to avoid pipeline reload
penalties caused by branches to unaligned 32-bit instructions
when in the Thumb2 ISA mode. This optimization improves the
execution speed of unaligned loops. This is the default action
if no option is specified.
The -mno-thumb2-align-loop form of this option does no
perform any loop alignment.