Compiling OpenJDK8 with LLVM for mips64el

Hi all,

Thanks for Aleksandar Beserminji great job:

https://reviews.llvm.org/D50437

It is not easy to reproduce the LLVMBUG-38221[1] by building OpenJDK8, it needs some workaround

https://raw.githubusercontent.com/xiangzhai/jdk8u-dev/master/Workaround-compile-with-llvm.patch

LLVM toolchain[2] is just able to compile OpenJDK8 for mips64el now:

http://hg.loongnix.org/

1. https://bugs.llvm.org/show_bug.cgi?id=38221#c10

2. $ clang -v
Loongson clang version 8.0.0 (git@github.com:llvm-mirror/clang.git 56fc90882612ab774dae937ca8d997c59364f7f8) (git@github.com:llvm-mirror/llvm.git 3419b04cf0c0a57577865f0d17fefb205deed048) (based on LLVM 8.0.0svn)
Target: mips64el-redhat-linux
Thread model: posix
InstalledDir: /usr/bin
Found candidate GCC installation: /usr/bin/../lib/gcc/mips64el-redhat-linux/4.9.3
Found candidate GCC installation: /usr/lib/gcc/mips64el-redhat-linux/4.9.3
Selected GCC installation: /usr/bin/../lib/gcc/mips64el-redhat-linux/4.9.3
Candidate multilib: .;
Selected multilib: .;

Hi Leslie, Great to see that this combination works as well with just so little tweaking! However, since the mips64 port is not in upstream (in fact, it’s currently not even an OpenJDK project), I think this patch better goes to the mips-port list. /Magnus

Hi Magnus,

Thanks for your kind response!

Hi all,

Thanks for Aleksandar Beserminji great job:

https://reviews.llvm.org/D50437

It is not easy to reproduce the LLVMBUG-38221[1] by building OpenJDK8, it needs some workaround

https://raw.githubusercontent.com/xiangzhai/jdk8u-dev/master/Workaround-compile-with-llvm.patch

Hi Leslie,

Great to see that this combination works as well with just so little tweaking!

However, since the mips64 port is not in upstream (in fact, it's currently not even an OpenJDK project), I think this patch better goes to the mips-port list.

Sorry for my poor English! Because Aleksandar had implemented the missing instructions for LLVM Mips target. And he asked me how to build OpenJDK8 for testing https://bugs.llvm.org/show_bug.cgi?id=38221#c9

So I just tested for him, thanks for his great job again!