Re: JIT compiling with LLVM v9.0

On Fri, Feb 2, 2018 at 5:11 PM, Thomas Munro
<thomas.munro@enterprisedb.com> wrote:
> Another small thing which might be environmental... llvmjit_types.bc
> is getting installed into ${prefix}/lib here, but you're looking for
> it in ${prefix}/lib/postgresql:

Is there something broken about my installation?  I see simple
arithmetic expressions apparently compiling and working but I can
easily find stuff that breaks... so far I think it's anything
involving string literals:

postgres=# set jit_above_cost = 0;
SET
postgres=# select quote_ident('x');
ERROR:  failed to resolve name MakeExpandedObjectReadOnlyInternal

Well actually just select 'hello world' does it.  I've attached a backtrace.

Tab completion is broken for me with jit_above_cost = 0 due to
tab-complete.c queries failing with various other errors including:

set <tab>:
ERROR:  failed to resolve name ExecEvalScalarArrayOp

update <tab>:
ERROR:  failed to resolve name quote_ident

show <tab>:
ERROR:  failed to resolve name slot_getsomeattrs

I wasn't sure from your status message how much of this is expected at
this stage...

This is built from:

commit 302b7a284d30fb0e00eb5f0163aa933d4d9bea10 (HEAD -> jit, andresfreund/jit)

... plus the extern "C" tweak I posted earlier to make my clang 4.0
compiler happy, built on a FreeBSD 11.1 box with:

./configure --prefix=/home/munro/install/ --enable-tap-tests
--enable-cassert --enable-debug --enable-depend --with-llvm CC="ccache
cc" CXX="ccache c++" CXXFLAGS="-std=c++11"
LLVM_CONFIG=/usr/local/llvm50/bin/llvm-config
--with-libraries="/usr/local/lib" --with-includes="/usr/local/include"

The clang that was used for bitcode was the system /usr/bin/clang,
version 4.0.  Is it a problem that I used that for compiling the
bitcode, but LLVM5 for JIT?  I actually tried
CLANG=/usr/local/llvm50/bin/clang but ran into weird failures I
haven't got to the bottom of at ThinLink time so I couldn't get as far
as a running system.

I installed llvm50 from a package.  I did need to make a tiny tweak by
hand: in src/Makefile.global, llvm-config --system-libs had said
-l/usr/lib/libexecinfo.so which wasn't linking and looks wrong to me
so I changed it to -lexecinfo, noted that it worked and reported a bug
upstream:  https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=225621

-- 
Thomas Munro
http://www.enterprisedb.com