Hello,

As explained in the audit trail, the problem was that in the selective 
scheduler I assumed that SUBREG_REG will always be a REG, which seems to be 
not the case.  This is not quite in line with what documentation says, if I 
read it correctly, but it seems to be used in a number of backends, so the 
below patch just gives up substitution also when SUBREG_REG is not a 
register.  Bootstrapped and tested on ia64, and verified that the test is 
fixed on x86_64.

I think that this qualifies as obvious, so unless Vlad or other people have 
any comments, I'll commit it tomorrow.

Yours, Andrey

2010-08-18  Andrey Belevantsev  <abel@ispras.ru>

	PR rtl-optimization/44691

	* sel-sched.c (count_occurrences_1): Also punt when SUBREG_REG
	is not a register.