[llvm-dev] error: ordered comparison between pointer and zero ('address' (aka 'unsigned char *') and 'int')

[Leslie Zhai via llvm-dev]

Hi HotSpot and LLVM developers,

I am building OpenJDK8[1] with LLVM toolchain[2] for mips64el, it failed 
to build:


/home/loongson/jdk8-mips/hotspot/src/share/vm/opto/lcm.cpp:52:35: error: 
ordered comparison between pointer and zero ('address' (aka 'unsigned 
char *') and 'int')
   if (Universe::narrow_oop_base() > 0) { // Implies UseCompressedOops.
       ~~~~~~~~~~~~~~~~~~~~~~~~~~~ ^ ~


Just like compiling Linux kernel with LLVM for mips64el[3], the bug 
could be fixed both in Compiler side and HotSpot side, please give me 
some suggestion, thanks a lot! And my sincere thanks will go to Nick who 
helped me a lot!

1. http://hg.loongnix.org/
2. Loongson clang version 7.0.0 
(git at github.com:Loong-Language/loong-clang.git 
c36069cffc57a30a20782bf327a87bed4e48a6c2) 
(git at github.com:Loong-Language/loong-llvm.git 
59cb663e72874dda740aa2b18bf47ba65b32fe9b) (based on LLVM 7.0.0svn)
Target: mips64el-redhat-linux
Thread model: posix
InstalledDir: /opt/loong-llvm/bin
Found candidate GCC installation: /usr/lib/gcc/mips64el-redhat-linux/4.9.3
Selected GCC installation: /usr/lib/gcc/mips64el-redhat-linux/4.9.3
Candidate multilib: .;
Selected multilib: .;
3. http://lists.llvm.org/pipermail/llvm-dev/2018-July/124620.html

-- 
Regards,
Leslie Zhai