Bug#905397: Unable to build Julia 0.7.0~rc2 due to illegal inttoptr

[Lumin]

Package: llvm-6.0-dev
Version: 1:6.0.1-2
Severity: important
X-Debbugs-CC: pkg-julia-devel at lists.alioth.debian.org

When trying to build Julia 0.7.0~rc2 on expeirmental, I encountered an
error from llvm, as shown in the bottom part of this email.

I haven't ingestigated into this problem but maybe debian's llvm needs this patch?
https://github.com/JuliaLang/julia/blob/master/deps/patches/llvm-D49832-SCEVPred.patch

Julia 0.7.0~rc2 is available here git at salsa.debian.org:julia-team/julia.git
in the "experimental" branch.

```
Statistics  ─────  0.335774 seconds
Stdlibs total  ── 66.031648 seconds
Sysimage built. Summary:
Total ───────  90.179929 seconds
Base: ───────  24.146837 seconds 26.7763%
Stdlibs: ────  66.031648 seconds 73.2221%
make[3]: Leaving directory '/home/lumin/packages/julia.pkg/julia'
make[3]: Entering directory '/home/lumin/packages/julia.pkg/julia'
 cd /home/lumin/packages/julia.pkg/julia/base && if ! /home/lumin/packages/julia.pkg/julia/usr/bin/julia -O3 -C "x86-64" --output-o /home/lumin/packages/julia.pkg/julia/usr/lib/x86_64-linux-gnu/julia/sys-o.a.tmp  --startup-file=no --warn-overwrite=yes --sysimage /home/lumin/packages/julia.pkg/julia/usr/lib/x86_64-linux-gnu/julia/sys.ji /home/lumin/packages/julia.pkg/julia/contrib/generate_precompile.jl /home/lumin/packages/julia.pkg/julia/usr/lib/x86_64-linux-gnu/julia/sys.ji; then echo '*** This error is usually fixed by running `make clean`. If the error persists, try `make cleanall`. ***'; false; fi
Generating precompile statements... 751 generated in  30.780778 seconds
Illegal inttoptr
	  %scevgep9 = ptrtoint i32 addrspace(13)* %scevgep to i64
Illegal inttoptr
	  %scevgep1011 = ptrtoint i32 addrspace(13)* %scevgep10 to i64

signal (6): Aborted
in expression starting at no file:0
gsignal at /lib/x86_64-linux-gnu/libc.so.6 (unknown line)
abort at /lib/x86_64-linux-gnu/libc.so.6 (unknown line)
runOnFunction at ./src/./src/llvm-gc-invariant-verifier.cpp:178
_ZN4llvm13FPPassManager13runOnFunctionERNS_8FunctionE at /usr/lib/x86_64-linux-gnu/libLLVM-6.0.so.1 (unknown line)
_ZN4llvm13FPPassManager11runOnModuleERNS_6ModuleE at /usr/lib/x86_64-linux-gnu/libLLVM-6.0.so.1 (unknown line)
_ZN4llvm6legacy15PassManagerImpl3runERNS_6ModuleE at /usr/lib/x86_64-linux-gnu/libLLVM-6.0.so.1 (unknown line)
operator() at ./src/./src/jitlayers.cpp:1182 [inlined]
jl_dump_native at ./src/./src/jitlayers.cpp:1191
jl_write_compiler_output at ./src/./src/precompile.c:84
jl_atexit_hook at ./src/./src/init.c:233
main at ./ui/./ui/repl.c:234
__libc_start_main at /lib/x86_64-linux-gnu/libc.so.6 (unknown line)
_start at /home/lumin/packages/julia.pkg/julia/usr/bin/julia (unknown line)
Allocations: 56990078 (Pool: 56980033; Big: 10045); GC: 124
Aborted
*** This error is usually fixed by running `make clean`. If the error persists, try `make cleanall`. ***
make[3]: *** [Makefile:216: /home/lumin/packages/julia.pkg/julia/usr/lib/x86_64-linux-gnu/julia/sys-o.a] Error 1
make[3]: Leaving directory '/home/lumin/packages/julia.pkg/julia'
make[2]: *** [Makefile:78: julia-sysimg-release] Error 2
make[2]: Leaving directory '/home/lumin/packages/julia.pkg/julia'
dh_auto_build: make -j4 "INSTALL=install --strip-program=true" prefix=/usr sysconfdir=/etc DESTDIR=debian/tmp/ LLVM_CONFIG=/usr/bin/llvm-config-6.0 LLVM_VER=6.0 MULTIARCH=x86_64-linux-gnu MULTIARCH_INSTALL=1 NO_GIT=1 "TAGGED_RELEASE_BANNER=Debian ⛬  julia/0.7.0~rc2-1" USE_BLAS64=0 USE_LLVM_SHLIB=1 USE_SYSTEM_BLAS=1 USE_SYSTEM_CURL=1 USE_SYSTEM_DSFMT=1 USE_SYSTEM_FFTW=1 USE_SYSTEM_GMP=1 USE_SYSTEM_LAPACK=1 USE_SYSTEM_LIBGIT2=1 USE_SYSTEM_LIBSSH2=1 USE_SYSTEM_LIBUNWIND=1 USE_SYSTEM_LIBUV=0 USE_SYSTEM_LLVM=1 USE_SYSTEM_MBEDTLS=1 USE_SYSTEM_MPFR=1 USE_SYSTEM_OPENSPECFUN=1 USE_SYSTEM_PATCHELF=1 USE_SYSTEM_PCRE=1 USE_SYSTEM_SUITESPARSE=1 USE_SYSTEM_UTF8PROC=1 VERBOSE=1 MARCH=x86-64 USE_SYSTEM_OPENLIBM=1 USE_SYSTEM_LIBM=0 LIBBLAS=-lopenblas LIBBLASNAME=libopenblas LIBLAPACK=-lopenblas LIBLAPACKNAME=libopenblas returned exit code 2
make[1]: *** [debian/rules:109: override_dh_auto_build] Error 2
make[1]: Leaving directory '/home/lumin/packages/julia.pkg/julia'
make: *** [debian/rules:106: build] Error 2
dpkg-buildpackage: error: debian/rules build subprocess returned exit status 2
debuild: fatal error at line 1152:
dpkg-buildpackage -rfakeroot -us -uc -ui -i -j4 failed
```