[Bug target/82150] Produces a branch prefetch which causes a hang

[david.welch at netronome dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82150

--- Comment #9 from david.welch at netronome dot com ---
Basically gcc is generating a sequence where data starts to execute in the
pipe.  I cant imagine that is a good idea to let the processor execute data
when you can avoid it

instead of a pop {...pc} ; some data  a pop { ... lr} ; bx lr creates a data
hazard, the bx doesnt execute until the register change has resolved.  Other
cores might not execute the words after a pop in the pipeline if pc is one of
the popped values but this core does.  Patching this instruction sequence after
the execution has started is just a kludge.