[Bug target/64460] ARM ICE on valid code

["joel at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64460

--- Comment #6 from Joel Sherrill <joel at gcc dot gnu.org> ---
(In reply to ktkachov from comment #5)
> (In reply to Joel Sherrill from comment #4)
> > (In reply to ktkachov from comment #3)
> > > I have a fix in the works. The bug is down to the "shift" attribute value in
> > > one of the patterns, although only xscale_sched_adjust_cost uses that
> > > attribute.
> > 
> > Awesome! I was about to start another attempt at a git bisect but it sounds
> > like you don't need it. Let me know if it is worth running.
> 
> Thanks, but no need. I think I've got the root cause and I got a fix that
> fixes the testcase, I just need to put it through testing.
> 
> A testsuite-appropriate reduced testcase would be nice I guess, although
> I'll kick off a reducer soon.

FWIW the head now builds for arm-rtems again but the bug is still present
with 15b6c83e88101ec7e2efedc114a7940cfbffa479.

FWIW there are a few warnings building the ARM:

../../../../../../gcc/libgcc/config/arm/fp16.c:97:1: warning: no previous
prototype for '__gnu_h2f_internal' [-Wmissing-prototypes]
../../../../../../gcc/libgcc/config/arm/fp16.c:122:1: warning: no previous
prototype for '__gnu_f2h_ieee' [-Wmissing-prototypes]
../../../../../../gcc/libgcc/config/arm/fp16.c:128:1: warning: no previous
prototype for '__gnu_h2f_ieee' [-Wmissing-prototypes]
../../../../../../gcc/libgcc/config/arm/fp16.c:134:1: warning: no previous
prototype for '__gnu_f2h_alternative' [-Wmissing-prototypes]
../../../../../../gcc/libgcc/config/arm/fp16.c:140:1: warning: no previous
prototype for '__gnu_h2f_alternative' [-Wmissing-prototypes]
../../../../../../gcc/libgcc/unwind-arm-common.inc:245:29: warning: cast
discards 'const' qualifier from pointer target type [-Wcast-qual]
../../../../../../gcc/libgcc/emutls.c:159:13: warning: implicit declaration of
function 'calloc' [-Wimplicit-function-declaration]
../../../../../../gcc/libgcc/emutls.c:159:13: warning: incompatible implicit
declaration of built-in function 'calloc'
../../../../../../gcc/libgcc/emutls.c:171:13: warning: implicit declaration of
function 'realloc' [-Wimplicit-function-declaration]
../../../../../../gcc/libgcc/emutls.c:171:13: warning: incompatible implicit
declaration of built-in function 'realloc'