RFR: 8327283: RISC-V: Minimal build failed after JDK-8319716 [v4]

[Gui Cao]

> Hi, please review this patch that fix the minimal build failed for riscv.
> 
> Error log for minimal build:
> 
> Creating support/modules_libs/java.base/minimal/libjvm.so from 591 file(s)
> ^@/home/zifeihan/jdk/src/hotspot/cpu/riscv/stubGenerator_riscv.cpp: In member function ‘u_char* StubGenerator::Sha2Generator::generate_sha2_implCompress(Assembler::SEW, bool)’:
> /home/zifeihan/jdk/src/hotspot/cpu/riscv/stubGenerator_riscv.cpp:3938:41: error: ‘MaxVectorSize’ was not declared in this scope; did you mean ‘MaxNewSize’?
>  3938 |       if (vset_sew == Assembler::e64 && MaxVectorSize == 16) { // SHA512 and VLEN = 128
>       |                                         ^~~~~~~~~~~~~
>       |                                         MaxNewSize
> gmake[3]: *** [lib/CompileJvm.gmk:165: /home/zifeihan/jdk/build/linux-riscv64-minimal-fastdebug/hotspot/variant-minimal/libjvm/objs/stubGenerator_riscv.o] Error 1
> gmake[3]: *** Waiting for unfinished jobs....
> ^@gmake[2]: *** [make/Main.gmk:253: hotspot-minimal-libs] Error 2
> gmake[2]: *** Waiting for unfinished jobs....
> ^@
> ERROR: Build failed for target 'images' in configuration 'linux-riscv64-minimal-fastdebug' (exit code 2)
> 
> === Output from failing command(s) repeated here ===
> * For target hotspot_variant-minimal_libjvm_objs_stubGenerator_riscv.o:
> /home/zifeihan/jdk/src/hotspot/cpu/riscv/stubGenerator_riscv.cpp: In member function ‘u_char* StubGenerator::Sha2Generator::generate_sha2_implCompress(Assembler::SEW, bool)’:
> /home/zifeihan/jdk/src/hotspot/cpu/riscv/stubGenerator_riscv.cpp:3938:41: error: ‘MaxVectorSize’ was not declared in this scope; did you mean ‘MaxNewSize’?
>  3938 |       if (vset_sew == Assembler::e64 && MaxVectorSize == 16) { // SHA512 and VLEN = 128
>       |                                         ^~~~~~~~~~~~~
>       |                                         MaxNewSize
> 
> * All command lines available in /home/zifeihan/jdk/build/linux-riscv64-minimal-fastdebug/make-support/failure-logs.
> === End of repeated output ===
> 
> No indication of failed target found.
> HELP: Try searching the build log for '] Error'.
> HELP: Run 'make doctor' to diagnose build problems.
> 
> make[1]: *** [/home/zifeihan/jdk/make/Init.gmk:323: main] Error 2
> make: *** [/home/zifeihan/jdk/make/Init.gmk:189: images] Error 2
> 
> 
> The root cause is that MaxVectorSize is only defined under COMPILER2 , We should use VM_Version::_initial_vector_length instead of MaxVectorSize.  
> 
> Testing:
> 
> - [x] linux-riscv minimal fastdebug native build

Gui Cao has updated the pull request incrementally with two additional commits since the last revision:

 - Move the sha256/512 part together with code for md5, chacha20 and sha1 and add put them into a single #if COMPILER2_OR_JVMCI block
 - Revert use VM_Version::_initial_vector_length instead of MaxVectorSize

-------------

Changes:
  - all: https://git.openjdk.org/jdk/pull/18114/files
  - new: https://git.openjdk.org/jdk/pull/18114/files/0c7a6780..a2199a46

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=18114&range=03
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=18114&range=02-03

  Stats: 685 lines in 1 file changed: 317 ins; 334 del; 34 mod
  Patch: https://git.openjdk.org/jdk/pull/18114.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/18114/head:pull/18114

PR: https://git.openjdk.org/jdk/pull/18114