The documentation for TARGET_SCHED_ADJUST_PRIORITY indicates that the 
hook can
reduce the priority of INSN to execute it later.  The hppa hook only 
reduces the priority
and it has been this way for years.  However, the assert in 
sel_target_adjust_priority()
prevents reduction of the priority.

The attached change revises the assert to allow the priority to be 
reduced to zero.

This fixes PR rtl-optimization/85458.

Tested on hppa-unknown-linux-gnu, hppa2.0w-hp-hpux11.11 and 
hppa64-hp-hpux11.11.

I must admit that this happens so infrequently that I have to wonder if 
the hook provides
any benefit on hppa.  It was supposed to keep addil instructions close 
to the following instruction
to reduce pressure on register %r1.

Okay?

Dave

-- 
John David Anglin  dave.anglin@bell.net