llvm9

[q66]

This adds llvm9, strips down llvm8 to a minimum (and updates it to 8.0.1), and bumps a bunch of other packages that should be bumped.

Platform testing:

• x86_64 [need help]
• x86_64-musl [need help]
• i686 [need help]
• ppc64le
• ppc64le-musl
• ppc64
• ppc64-musl
• ppc
• ppc-musl
• aarch64
• aarch64-musl
• armv7l [need help]
• armv6l [need help]
• armv7l-musl [need help]

To bump + test:

• llvm
• libcxxabi
• libcxx
• llvm-libunwind
• libGL
• beignet [need help, x86 only]
• libclc-git
• juCi++
• kdevelop
• rtags
• bcc
• ccls
• clazy
• include-what-you-use
• shiboken2
• codelite
• gnome-builder
• bpftrace
• qtcreator
• qt5 [to be bumped by 5.13.1 update]

rebuild but not bump (no target llvm/clang dependency):

• ardour
• afl [need help, x86 only]
• blender
• firefox
• firefox-esr
• icecat
• thunderbird
• chromium [need help, won't build here]
• godot
• ispc [need help, x86 only]
• yosys
• rdedup
• pijul

Rust will need to be bumped but we'll do that as a part of the upcoming Rust update to avoid building twice.

[q66]

This will need a few more iterations before it at least builds properly on my machine, so wait with testing until I've done so...

[q66]

Also switching llvm to py3 while at it.

[q66]

py3 transition done, llvm is now buildable... i think testing can begin

[q66]

Added patches fixing llvm-libunwind on 32-bit ppc and a subtle libcxx fix on ppc* in general, added a gcc9 miscompilation backport patch for clang

[leahneukirchen]

Tested llvm* build on x86_64, works!

beignet: /usr/bin/ld: CMakeFiles/gbeinterp.dir/gbe_bin_interpreter.cpp.o:(.data.rel+0x0):
undefined reference to `llvm::DisableABIBreakingChecks'

[leahneukirchen]

afl: clang-9: error: unknown argument: '-fstack-clash-protection'

Patching that out:

echo 0 | ../afl-showmap -m none -q -o .test-instr0 ./test-instr
echo 1 | ../afl-showmap -m none -q -o .test-instr1 ./test-instr

Oops, the instrumentation does not seem to be behaving correctly!

Please ping <lcamtuf@google.com> to troubleshoot the issue.

[leahneukirchen]

ispc works.

[q66]

I suspect afl has been broken all along then since -fstack-clash-protection is not a thing in clang8 either, AFAIK it's a hardening flag we add ourselves. Beignet will probably need patching.

[leahneukirchen]

AFL bump and fix: https://0x0.st/ztdv.diff

[leahneukirchen]

Arch uses a Git snapshot for beignet and a llvm8 patch.

[q66]

Added afl update into the batch...

[q66]

Looks like the Arch llvm8 patch should be the one for beignet; can you try dropping it into the tree and building with it?

[leahneukirchen]

Yes, but it doesnt work on 1.3.2 release I think.

[q66]

It should, I looked at their git and it seems there was only a handful of commits since then.

[leahneukirchen]

/builddir/Beignet-1.3.2-Source/backend/src/llvm/llvm_sampler_fix.cpp: In member 
function 'bool gbe::SamplerFix::visitCallInst(llvm::CallInst*)':
/builddir/Beignet-1.3.2-Source/backend/src/llvm/llvm_sampler_fix.cpp:85:53: erro
r: cannot convert 'llvm::FunctionCallee' to 'llvm::Value*' in initialization

[q66]

As I see it,

Value* samplerCvt = M->getOrInsertFunction("__gen_ocl_sampler_to_int", i32Ty, I->getOperand(0)->getType());

will need changing to

Value* samplerCvt = M->getOrInsertFunction("__gen_ocl_sampler_to_int", i32Ty, I->getOperand(0)->getType()).getCallee();

in two places in that file when compiling for llvm9.

[leahneukirchen]

FreeBSD has a complete patchset, but I have other things to do right now: https://bz-attachments.freebsd.org/attachment.cgi?id=206326

[leahneukirchen]

Chromium built on x86_64.

[q66]

Rebased, and dropped qt5 rebuild as it'll be done by the 5.13.1 update: #14701 - beignet still broken for some reason

[q66]

Beignet fixed. I think this makes all the packages

[q66]

This is ready to land