https://gcc.gnu.org/bugzilla/show_bug.cgi?id=58623
--- Comment #7 from amker at gcc dot gnu.org --- Hi Evandro, There is specific PR for this issue. But as we know, fwprop often corrupts optimizations on address expression, for below example: add rb, r1, r2 ldr rx, [rb] add rb, rb, #4 It's transformed into below by fwprop: add rb, r1, r2 ldr rx, [r1, r2] add rb, rb, #4 This corrupts post-increment opportunity. Though in different form, it's actually same issue as in ldp/stp. I think https://gcc.gnu.org/bugzilla/show_bug.cgi?id=44883 describes the problem in some manner, and there might be other PR about it too.
