[15] RFR (L): 8241436: C2: Factor out C2-specific code from MacroAssembler

[Vladimir Ivanov]

Thanks for the review, Vladimir.

> Did you build and test without C2: configure 
> --with-jvm-features=-compiler2 ?

I didn't perform extensive testing, but I verified that the build works 
and ran some smoke tests that the JVM isn't completely broken.

Best regards,
Vladimir Ivanov

> On 3/23/20 6:49 AM, Vladimir Ivanov wrote:
>> http://cr.openjdk.java.net/~vlivanov/8241436/webrev.00/
>> https://bugs.openjdk.java.net/browse/JDK-8241436
>>
>> (The patch is built on top of 8240248 [1].)
>>
>> MacroAssembler has C2-only declarations and the number is growing over 
>> time.
>>
>> C1 and template interpreter already subclass MacroAssembler for their 
>> own needs (C1_MacroAssembler and InterpreterMacroAssembler respectively).
>>
>> I propose to introduce C2_MacroAssembler, move C2-specific code there, 
>> and use it exclusively across C2 code base.
>>
>> I took the liberty and refactored aarch64, arm32, ppc64, s390x code 
>> along the way. I did a cross-build, but I ask maintaners to verify 
>> that it doesn't break anything.
>>
>> Testing: tier1-4, build (product+debug): 
>> linux-aarch64,linux-arm32,linux-ppc64le,linux-s390x,linux-x64,solaris-sparcv9 
>>
>>
>> Thanks!
>>
>> Best regards,
>> Vladimir Ivanov
>>
>> [1] 8240248: Extend superword reduction optimizations for x86
>>      http://cr.openjdk.java.net/~sviswanathan/8240248/webrev.02/