[PATCH] Fix PR 44691

[Andrey Belevantsev]

On 19.08.2010 17:28, H.J. Lu wrote:
> 2010/8/18 Andrey Belevantsev<abel@ispras.ru>:
>> 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.
>>
>
> Shouldn't we add the testcase?
The test is fortran.dg/pr42294.f which is actually mentioned in the bug 
report.  Sorry for not saying this explicitly in the mail.

Andrey