[ping] RFR(M): 8160245: C1: Clean up platform #defines in c1_LIR.hpp.

[Coleen Phillimore]

Why is there a third register parameter to 
generate_stack_overflow_check() that is unused on all the platforms?

I would almost rather have one version with no arguments overloaded with 
one with two, than three default parameters.  It seems dangerous.

thanks,
Coleen

On 7/5/16 6:47 PM, Vladimir Kozlov wrote:
> CC to runtime too since it has changes in Interpreter and affects our 
> closed code.
>
> Hi Goetz,
>
> Please, set "Fix Version".
>
> And if it is JDK 9 you need FC Extension Request since you converted 
> it to Enhancement:
>
> http://mail.openjdk.java.net/pipermail/jdk9-dev/2016-June/004443.html
>
> Someone from Oracle have to sponsor it and do related closed code 
> changes and testing.
>
> Thanks,
> Vladimir
>
> On 7/5/16 3:47 AM, Lindenmaier, Goetz wrote:
>> Hi,
>>
>> could someone please have a look at this issue? I recap the description
>> below, and I also updated the webrev which would no more apply to
>> hs-comp:
>>
>> c1_LIR.hpp defines a row of functions guarded by platform
>> defines. This is bad style and hinders new platform ports.
>> (I'm working on S390 aka Z :))
>>
>> This change removes the majority of these defines. It introduces
>> common headers, and moves implementations to c1_LIR_<cpu>.cpp files.
>>
>> It guards single_softfp() and double_softfp() by __SOFTFP__.
>> This is not used in any openJdk platform. I can not test this
>> on the closed platforms ARM32 and PPC32.
>>
>> It removes the guard around the LIR_Address constructor. There
>> is no point in guarding this code, verify() assures by
>> assertions that it can not be misused. I also introduce a new
>> constructor that leaves out the scale argument and introduce
>> some usages on X86.
>>
>> This change also moves verify() to the new platform files. In the
>> header, LIR_ADDRESS_PD_VERIFY was used to guard usage
>> of pd_verify(). Neither of these are used in openJdk. If this define
>> is used in the closed ports pd_verify() must be renamed to verify().
>>
>> The code that was previously guarded by ARM, ARM32 or PPC32 is
>> moved to a properly guarded section in c1_LIR.cpp. Actually,
>> it should be moved to according new files c1_LIR_<cpu>.cpp in
>> the closed ports. But this way the change should basically
>> work for the closed ports.
>>
>> I added fnoreg on x86 to note down the code similarly on all
>> platforms.
>>
>> I cleaned up a flag with a limited range on PPC_32.
>>
>> generate_stack_overflow_check() in templateInterpreterGenerator.hpp
>> is defined with different parameters for the platforms. I added default
>> parameters noreg so that the signature is the same for all platforms.
>>
>> Please review this change. I please need a sponsor.
>> https://bugs.openjdk.java.net/browse/JDK-8160245
>> http://cr.openjdk.java.net/~goetz/wr16/8160245-simplifyC1/webrev.02/
>>
>> I built and tested this on linuxx86_64, solaris_sparc and
>> the ppc platforms.
>>
>> Best regards,
>>   Goetz.
>>
>>