https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69460
--- Comment #6 from strntydog at gmail dot com --- I have built GCC 7.1.0 and have tested this optimization bug against that. It persists. Further, the new target cortx-m23 is affected by the bug, exactly the same as Cortex M0/M0+ and M1 The new cortex-m33 target behaves the same as the cortex-m3, in that it produces legal code for the cortex-m23/m0/m0+/m1 but it is much better optimised.
