Compilation error on drivers/md/raid6int8.c on net-next-2.6

Compilation error on drivers/md/raid6int8.c on net-next-2.6

[Breno Leitao]

I just pulled net-next-2.6 and compiling it on a ppc machine I got the 
following error:


  CC [M]  drivers/md/raid6tables.o
  CC [M]  drivers/md/raid6int8.o
drivers/md/raid6int8.c: In function `raid6_int8_gen_syndrome':
drivers/md/raid6int8.c:185: error: unable to find a register to spill in 
class `FLOAT_REGS'
drivers/md/raid6int8.c:185: error: this is the insn:
(insn:HI 619 799 638 4 drivers/md/raid6int8.c:168 (set (mem:DI (plus:DI 
(reg/v/f:DI 122 [ p ])
                (reg/v:DI 66 ctr [orig:124 d ] [124])) [0 S8 A64])
        (reg/v:DI 129 [ wp0 ])) 320 {*movdi_internal64} (nil)
    (expr_list:REG_DEAD (reg/v:DI 129 [ wp0 ])
        (nil)))
drivers/md/raid6int8.c:185: confused by earlier errors, bailing out
make[2]: *** [drivers/md/raid6int8.o] Error 1
make[1]: *** [drivers/md] Error 2
make: *** [drivers] Error 2

Re: Compilation error on drivers/md/raid6int8.c on net-next-2.6

[Adrian Bunk]

On Wed, Jul 16, 2008 at 02:56:28PM -0300, Breno Leitao wrote:
> I just pulled net-next-2.6 and compiling it on a ppc machine I got the  
> following error:
>
>
>  CC [M]  drivers/md/raid6tables.o
>  CC [M]  drivers/md/raid6int8.o
> drivers/md/raid6int8.c: In function `raid6_int8_gen_syndrome':
> drivers/md/raid6int8.c:185: error: unable to find a register to spill in  
> class `FLOAT_REGS'
> drivers/md/raid6int8.c:185: error: this is the insn:
> (insn:HI 619 799 638 4 drivers/md/raid6int8.c:168 (set (mem:DI (plus:DI  
> (reg/v/f:DI 122 [ p ])
>                (reg/v:DI 66 ctr [orig:124 d ] [124])) [0 S8 A64])
>        (reg/v:DI 129 [ wp0 ])) 320 {*movdi_internal64} (nil)
>    (expr_list:REG_DEAD (reg/v:DI 129 [ wp0 ])
>        (nil)))
> drivers/md/raid6int8.c:185: confused by earlier errors, bailing out
> make[2]: *** [drivers/md/raid6int8.o] Error 1
> make[1]: *** [drivers/md] Error 2
> make: *** [drivers] Error 2

That's a gcc bug.

Which gcc version are you using?

cu
Adrian

-- 

       "Is there not promise of rain?" Ling Tan asked suddenly out
        of the darkness. There had been need of rain for many days.
       "Only a promise," Lao Er said.
                                       Pearl S. Buck - Dragon Seed

Re: Compilation error on drivers/md/raid6int8.c on net-next-2.6

[Breno Leitao]

Adrian Bunk wrote:
> On Wed, Jul 16, 2008 at 02:56:28PM -0300, Breno Leitao wrote:
>   
>> drivers/md/raid6int8.c: In function `raid6_int8_gen_syndrome':
>> drivers/md/raid6int8.c:185: error: unable to find a register to spill in  
>> class `FLOAT_REGS'
>> drivers/md/raid6int8.c:185: error: this is the insn:
>> (insn:HI 619 799 638 4 drivers/md/raid6int8.c:168 (set (mem:DI (plus:DI  
>> (reg/v/f:DI 122 [ p ])
>>                (reg/v:DI 66 ctr [orig:124 d ] [124])) [0 S8 A64])
>>        (reg/v:DI 129 [ wp0 ])) 320 {*movdi_internal64} (nil)
>>    (expr_list:REG_DEAD (reg/v:DI 129 [ wp0 ])
>>        (nil)))
>> drivers/md/raid6int8.c:185: confused by earlier errors, bailing out
>> make[2]: *** [drivers/md/raid6int8.o] Error 1
>> make[1]: *** [drivers/md] Error 2
>> make: *** [drivers] Error 2
>>     
>
> That's a gcc bug.
>
> Which gcc version are you using?
I was using a RHEL4 machine (gcc version  3.4.6).  I just upgraded  gcc 
to 4.1.2, and the "problem"  just disappeared.  :-)

Thanks
Breon