Gentoolto: media-libs/dav1d doesn't build with graphite

[ElDavoo]

-O2 -fno-stack-protector -march=native -falign-functions=32 -O3 -fgraphite-identity -floop-nest-optimize -fdevirtualize-at-ltrans -fipa-pta -fno-semantic-interposition -flto=1 -fuse-linker-plugin -Wl,-O1 -Wl,--as-needed -Wl,-O1 -Wl,--as-needed -O2 -fno-stack-protector -march=native -falign-functions=32 -O3 -fgraphite-identity -floop-nest-optimize -fdevirtualize-at-ltrans -fipa-pta -fno-semantic-interposition -flto=1 -fuse-linker-plugin -pthread -Wl,--start-group -lm -Wl,--end-group
during GIMPLE pass: graphite
../dav1d-0.5.1/tests/checkasm/looprestoration.c: In function ‘check_sgr.isra.0’:
../dav1d-0.5.1/tests/checkasm/looprestoration.c:118:13: internal compiler error: Segmentation fault
  118 | static void check_sgr(Dav1dLoopRestorationDSPContext *const c) {
      |             ^

Disabling graphite fixes the issue and makes dav1d compile correctly.

[jiblime]

I have had no troubles compiling with bfd nor gold. Can you post the full build.log and your build env? GCC, binutils, etc

=================================================================
                        Package Settings
=================================================================

media-libs/dav1d-0.5.1::gentoo was built with the following:
USE="10bit 8bit asm" ABI_X86="(64) -32 (-x32)"
CFLAGS="-O3 -march=native -fgraphite-identity -floop-nest-optimize -fdevirtualize-at-ltrans -fno-plt -fipa-pta -fno-semantic-interposition -fno-math-errno -fno-trapping-math -flto=12 -malign-data=cacheline -pipe -fuse-ld=bfd -falign-functions=32 -Wl,-O1 -Wl,--as-needed"
CXXFLAGS="-O3 -march=native -fgraphite-identity -floop-nest-optimize -fdevirtualize-at-ltrans -fno-plt -fipa-pta -fno-semantic-interposition -fno-math-errno -fno-trapping-math -flto=12 -malign-data=cacheline -pipe -fuse-ld=bfd -falign-functions=32 -Wl,-O1 -Wl,--as-needed"
LDFLAGS="-Wl,-O1 -Wl,--as-needed -O3 -march=native -fgraphite-identity -floop-nest-optimize -fdevirtualize-at-ltrans -fno-plt -fipa-pta -fno-semantic-interposition -fno-math-errno -fno-trapping-math -flto=12 -malign-data=cacheline -pipe -fuse-ld=bfd -falign-functions=32"

There was a recent isl version bump. Have you rebuilt GCC after upgrading dev-libs/isl?

[elsandosgrande]

Seconded.

~~~ bash

Package Settings

media-libs/dav1d-0.5.1::gentoo was built with the following:
USE="10bit 8bit asm" ABI_X86="32 (64) -x32"
CFLAGS="-O3 -march=bdver4 -pipe -pthread -fira-hoist-pressure -fira-loop-pressure -fbranch-target-load-optimize -fweb -fgraphite-identity -floop-nest-optimize -fdevirtualize-at-ltrans -fipa-pta -fno-semantic-interposition -flto=2 -fuse-linker-plugin -fuse-ld=bfd -Wall -Wextra -Wl,-O1 -Wl,--as-needed -Wl,-O3"
CXXFLAGS="-O3 -march=bdver4 -pipe -pthread -fira-hoist-pressure -fira-loop-pressure -fbranch-target-load-optimize -fweb -fgraphite-identity -floop-nest-optimize -fdevirtualize-at-ltrans -fipa-pta -fno-semantic-interposition -flto=2 -fuse-linker-plugin -fuse-ld=bfd -Wall -Wextra -Wl,-O1 -Wl,--as-needed -Wl,-O3"
LDFLAGS="-O3 -march=bdver4 -pipe -pthread -fira-hoist-pressure -fira-loop-pressure -fbranch-target-load-optimize -fweb -fgraphite-identity -floop-nest-optimize -fdevirtualize-at-ltrans -fipa-pta -fno-semantic-interposition -flto=2 -fuse-linker-plugin -fuse-ld=bfd -Wall -Wextra -Wl,-O1 -Wl,--as-needed -Wl,-O3"
~~~

[ElDavoo]

Here you go. Will try recompiling gcc later.
build.log
info.txt
pqv.txt
env.txt

[elsandosgrande]

Hm... Which linker are you using?

[ElDavoo]

Recompiling gcc didn't solve the issue.
How do I know which linker I'm using? :)

[ElDavoo]

Was using gold but fails with bfd too.

[jiblime]

media-libs/dav1d-0.5.1::gentoo was built with the following:
USE="10bit 8bit asm" ABI_X86="(64) -32 (-x32)"
CFLAGS="-O2 -fno-stack-protector -fno-stack-check -fomit-frame-pointer -march=native -falign-functions=32 -O3 -fgraphite-identity -floop-nest-optimize -fdevirtualize-at-ltrans -fipa-pta -fno-semantic-interposition -flto=1 -fuse-linker-plugin -Wl,-O1 -Wl,--as-needed"
CXXFLAGS="-O2 -fno-stack-protector -fno-stack-check -fomit-frame-pointer -march=native -falign-functions=32 -O3 -fgraphite-identity -floop-nest-optimize -fdevirtualize-at-ltrans -fipa-pta -fno-semantic-interposition -flto=1 -fuse-linker-plugin -Wl,-O1 -Wl,--as-needed"
LDFLAGS="-Wl,-O1 -Wl,--as-needed -O2 -fno-stack-protector -fno-stack-check -fomit-frame-pointer -march=native -falign-functions=32 -O3 -fgraphite-identity -floop-nest-optimize -fdevirtualize-at-ltrans -fipa-pta -fno-semantic-interposition -flto=1 -fuse-linker-plugin"

I am still unable to reproduce your graphite issue. Maybe try rebuilding binutils for linking and glibc because it's linking libm (both with sane FLAGS).

To check, ld -v. GNU ld is ld.bfd, GNU gold is ld.gold. Use binutils-config --linker ld.bfd to switch between bfd or gold. -fuse-ld=* will override that, but maybe not all the time, for ex. the kernel.

[elsandosgrande]

@jiblime Since we're not talking about compiling the kernel, I think that -fuse-ld=[linker name goes here] is enough. It's certainly easier to tell from the flags which linker is being used if it is explicitly being declared in the flags.

@ElDavoo I second jiblime's advice.

[ElDavoo]

No luck with both linkers.
I'm sorry you can't reproduce it. This is getting more and more obscure.

[zhuyifei1999]

I can reproduce. I'm currently doing a world rebuild and see if that will fix it

[zhuyifei1999]

see if that will fix it

It didn't. Very similar build.log:
build.log

I'll note that during the world rebuild the currently installed version, =media-libs/dav1d-0.4.0, also failed to compile. It was installed on August 19 and I'm pretty sure I have graphite on at the time.

[jiblime]

@zhuyifei1999 , @ElDavoo , what processors are you building on?

[elsandosgrande]

@jiblime From their build logs:

~~~ bash

• Linux zhuyifei1999-ThinkPad-T480 5.3.7 #8 SMP Wed Oct 30 21:53:11 CDT 2019 x86_64 Intel(R) Core(TM) i5-8250U CPU @ 1.60GHz GenuineIntel GNU/Linux
• Linux lenuovo 5.3.11-gentoo #1 SMP PREEMPT Thu Nov 14 10:57:34 CET 2019 x86_64 Intel(R) Pentium(R) CPU N3520 @ 2.16GHz GenuineIntel GNU/Linux
  ~~~

@zhuyifei1999 * LDFLAGS='-Wl,-O1 -Wl,--as-needed -Wl,--hash-style=gnu -march=native -O3 -fgraphite-identity -floop-nest-optimize -fdevirtualize-at-ltrans -fipa-pta -fno-semantic-interposition -flto=7 -fuse-linker-plugin -falign-functions=32 -pipe -ggdb'

-ggdb

Why!?

[zhuyifei1999]

-ggdb

Why!?

I debug random stuffs a lot, when I get the time to. Heh. It rarely cause any issue except memory & disk usage during some compilation.

[ElDavoo]

so?

[elsandosgrande]

@jiblime

[wolfwood]

looks like no one has tested rebuilding gcc against isl-0.21 yet? I'll give it a shot after my current world rebuild finishes.

[pchome]

--- a/meson_options.txt
+++ b/meson_options.txt
@@ -22,7 +22,7 @@

 option('enable_tests',
     type: 'boolean',
-    value: true,
+    value: false,
     description: 'Build dav1d tests')

 option('logging',

[wolfwood]

downgrading to isl-0.21 fixes both this and the #450 GRAPHITE ICE. this is a gcc graphite regression.

[elsandosgrande]

Good thing that I didn't have to build Dav1d recently then. So... Who's gonna report this to GNU?

[wolfwood]

account creation on the GCC bugzilla is currently restricted, but I've requested an account. otherwise, I believe @InBetweenNames has filed gcc bugs before.

[elsandosgrande]

Fingers crossed!

[ElDavoo]

In the meantime I'd like to you inform you that dav1d 0.5.2 doesn't compile.

[wolfwood]

@ElDavoo until the gcc bug is fixed, media-libs/dav1d *FLAGS-="${GRAPHITE}" is necessary.

We could check in this work around and tag it with this bug ID, then remove it when the bug can be resolved.

[pchome]

@wolfwood
Do you really need those tests to be optimized? Or do you need those tests? Build them separately.

Or it's only usage for media-libs/dav1d for now ?
I don't know, because I built it out of curiosity, w/ emerge -1B ...

EDIT: Sorry, I'm tired, I'm asking stupid questions here and there tonight, so clarification:
I know it should be reported, but there was several strings right after the output. Like "report this to bugs.gentoo.org". There are people who maintain GCC-family bugs. So (I mean you should) try to report and apply gentoo-like solution fof this time.

[wolfwood]

@pchome I'm more interested in #450 but it seems that this is the same underlying issue in gcc

for this, sure throw tests under a use flag, off by default.

[jiblime]

dav1d-0.5.2:20191214-042057_nocolor.log
No issues here.

media-libs/dav1d-0.5.2

media-libs/dav1d-0.5.2::gentoo was built with the following:
USE="10bit 8bit asm" ABI_X86="(64) -32 (-x32)"
CFLAGS="-O3 -march=native -fgraphite-identity -floop-nest-optimize -fipa-pta -fdevirtualize-at-ltrans -fno-semantic-interposition -flto -flimit-function-alignment -minline-stringops-dynamically -pipe -fuse-linker-plugin -Wl,-O1 -Wl,--as-needed"
CXXFLAGS="-O3 -march=native -fgraphite-identity -floop-nest-optimize -fipa-pta -fdevirtualize-at-ltrans -fno-semantic-interposition -flto -flimit-function-alignment -minline-stringops-dynamically -pipe -fuse-linker-plugin -Wl,-O1 -Wl,--as-needed"
LDFLAGS="-Wl,-O1 -Wl,--as-needed -O3 -march=native -fgraphite-identity -floop-nest-optimize -fipa-pta -fdevirtualize-at-ltrans -fno-semantic-interposition -flto -flimit-function-alignment -minline-stringops-dynamically -pipe -fuse-linker-plugin"

sys-devel/gcc-9.2.0

Note: I explicitly declare -march=znver2 instead of native because there are some strange parts of GCC that doesn't use native as an arch. Example being gccjit. I also have custom patches but I don't think they are related. Mention me if you would like me to upload them, otherwise I'll forget

sys-devel/gcc-9.2.0-r2::local was built with the following:
USE="custom-cflags (cxx) fortran graphite lto (multilib) nls nptl objc openmp pch pgo sanitize ssp test (-altivec) -d -debug -doc (-fixed-point) -go (-hardened) -jit (-libssp) -objc++ -objc-gc -pie -systemtap -vanilla -vtv" ABI_X86="(64)"
CFLAGS="-O3 -march=znver2 -fgraphite-identity -floop-nest-optimize -fno-semantic-interposition -flimit-function-alignment --param=max-unroll-times=4 -fno-signed-zeros -fno-trapping-math -D__FAST_MATH__=1 -minline-stringops-dynamically -maccumulate-outgoing-args -pipe -fopt-info-vec-loop"
CXXFLAGS="-O3 -march=znver2 -fgraphite-identity -floop-nest-optimize -fno-semantic-interposition -flimit-function-alignment --param=max-unroll-times=4 -fno-signed-zeros -fno-trapping-math -D__FAST_MATH__=1 -minline-stringops-dynamically -maccumulate-outgoing-args -pipe -fopt-info-vec-loop"
FEATURES="assume-digests binpkg-docompress binpkg-dostrip binpkg-logs candy config-protect-if-modified distlocks fixlafiles ipc-sandbox keepwork merge-sync multilib-strict network-sandbox news parallel-fetch parallel-install pid-sandbox preserve-libs protect-owned sandbox sfperms split-elog split-log strict unknown-features-warn unmerge-logs unmerge-orphans userfetch userpriv usersandbox usersync xattr"

dev-libs/isl-0.22

dev-libs/isl-0.22::gentoo was built with the following:
USE="-static-libs" ABI_X86="32 (64) (-x32)"
CFLAGS="-O3 -march=native -fgraphite-identity -floop-nest-optimize -fdevirtualize-at-ltrans -fno-semantic-interposition -fno-math-errno -fno-trapping-math -flto -pipe -falign-functions=32 -fuse-linker-plugin -Wl,-O1 -Wl,--as-needed"
CXXFLAGS="-O3 -march=native -fgraphite-identity -floop-nest-optimize -fdevirtualize-at-ltrans -fno-semantic-interposition -fno-math-errno -fno-trapping-math -flto -pipe -falign-functions=32 -fuse-linker-plugin -Wl,-O1 -Wl,--as-needed"
FEATURES="assume-digests binpkg-docompress binpkg-dostrip binpkg-logs candy config-protect-if-modified distlocks ebuild-locks fixlafiles ipc-sandbox merge-sync multilib-strict network-sandbox news parallel-fetch parallel-install pid-sandbox preserve-libs protect-owned sandbox sfperms split-elog split-log strict unknown-features-warn unmerge-logs unmerge-orphans userfetch userpriv usersandbox usersync xattr"
LDFLAGS="-Wl,-O1 -Wl,--as-needed -O3 -march=native -fgraphite-identity -floop-nest-optimize -fdevirtualize-at-ltrans -fno-semantic-interposition -fno-math-errno -fno-trapping-math -flto -pipe -falign-functions=32 -fuse-linker-plugin"

dev-util/meson-0.52.0

dev-util/meson-0.52.0::gentoo was built with the following:
USE="-test" ABI_X86="(64)" PYTHON_TARGETS="python3_6 python3_7 -python3_5"
CFLAGS="-O3 -march=native -fgraphite-identity -floop-nest-optimize -fipa-pta -fdevirtualize-at-ltrans -fno-semantic-interposition -fno-math-errno -fno-trapping-math -flto -flimit-function-alignment -minline-stringops-dynamically -pipe -fuse-linker-plugin -Wl,-O1 -Wl,--as-needed -Wl,-z,now"
CXXFLAGS="-O3 -march=native -fgraphite-identity -floop-nest-optimize -fipa-pta -fdevirtualize-at-ltrans -fno-semantic-interposition -fno-math-errno -fno-trapping-math -flto -flimit-function-alignment -minline-stringops-dynamically -pipe -fuse-linker-plugin -Wl,-O1 -Wl,--as-needed -Wl,-z,now"
FEATURES="pid-sandbox fixlafiles binpkg-logs unmerge-orphans distlocks protect-owned candy usersandbox parallel-install sfperms network-sandbox split-log unknown-features-warn multilib-strict news binpkg-dostrip assume-digests userfetch ipc-sandbox sandbox binpkg-docompress unmerge-logs preserve-libs split-elog xattr usersync config-protect-if-modified strict parallel-fetch userpriv merge-sync"
LDFLAGS="-Wl,-O1 -Wl,--as-needed -Wl,-z,now -O3 -march=native -fgraphite-identity -floop-nest-optimize -fipa-pta -fdevirtualize-at-ltrans -fno-semantic-interposition -fno-math-errno -fno-trapping-math -flto -flimit-function-alignment -minline-stringops-dynamically -pipe -fuse-linker-plugin"

dev-util/ninja-1.9.0

dev-util/ninja-1.9.0::gentoo was built with the following:
USE="-doc -emacs -test -vim-syntax" ABI_X86="(64)"
CFLAGS="-O3 -march=native -fipa-pta -fdevirtualize-at-ltrans -fno-semantic-interposition -flto -flimit-function-alignment -pipe -fuse-linker-plugin -Wl,-O1 -Wl,--as-needed"
CXXFLAGS="-O3 -march=native -fipa-pta -fdevirtualize-at-ltrans -fno-semantic-interposition -flto -flimit-function-alignment -pipe -fuse-linker-plugin -Wl,-O1 -Wl,--as-needed"
LDFLAGS="-Wl,-O1 -Wl,--as-needed -O3 -march=native -fipa-pta -fdevirtualize-at-ltrans -fno-semantic-interposition -flto -flimit-function-alignment -pipe -fuse-linker-plugin"

dev-lang/nasm-2.14.02

dev-lang/nasm-2.14.02::gentoo was built with the following:
USE="-doc" ABI_X86="(64)"
CFLAGS="-march=native -pipe -Wl,-O1 -Wl,--as-needed -O2"
CXXFLAGS="-march=native -pipe -Wl,-O1 -Wl,--as-needed -O2"
FEATURES="assume-digests binpkg-docompress binpkg-dostrip binpkg-logs candy config-protect-if-modified distlocks ebuild-locks fixlafiles ipc-sandbox merge-sync multilib-strict network-sandbox news parallel-fetch parallel-install pid-sandbox preserve-libs protect-owned sandbox sfperms split-elog split-log strict unknown-features-warn unmerge-logs unmerge-orphans userfetch userpriv usersandbox usersync xattr"
LDFLAGS="-Wl,-O1 -Wl,--as-needed -march=native -pipe -O2"

[elsandosgrande]

So... 0.5.2 fails, but only for the 64-bit library. Building the 32-bit library does not cause this error.

~~~ bash

*

Package Settings

dev-libs/isl-0.22::gentoo was built with the following:
USE="-static-libs" ABI_X86="32 (64) -x32"
CFLAGS="-O3 -march=bdver4 -pipe -pthread -fira-hoist-pressure -fira-loop-pressure -fbranch-target-load-optimize -fweb -ftracer -fsched2-use-superblocks -fgraphite-identity -floop-nest-optimize -fdevirtualize-at-ltrans -fipa-pta -fno-semantic-interposition -flto=2 -fuse-linker-plugin -fuse-ld=bfd -Wall -Wextra -Wl,-O1 -Wl,--as-needed -Wl,-O3"
CXXFLAGS="-O3 -march=bdver4 -pipe -pthread -fira-hoist-pressure -fira-loop-pressure -fbranch-target-load-optimize -fweb -ftracer -fsched2-use-superblocks -fgraphite-identity -floop-nest-optimize -fdevirtualize-at-ltrans -fipa-pta -fno-semantic-interposition -flto=2 -fuse-linker-plugin -fuse-ld=bfd -Wall -Wextra -Wl,-O1 -Wl,--as-needed -Wl,-O3"
LDFLAGS="-O3 -march=bdver4 -pipe -pthread -fira-hoist-pressure -fira-loop-pressure -fbranch-target-load-optimize -fweb -ftracer -fsched2-use-superblocks -fgraphite-identity -floop-nest-optimize -fdevirtualize-at-ltrans -fipa-pta -fno-semantic-interposition -flto=2 -fuse-linker-plugin -fuse-ld=bfd -Wall -Wextra -Wl,-O1 -Wl,--as-needed -Wl,-O3"

dev-util/meson-0.52.0::gentoo was built with the following:
USE="-test" ABI_X86="(64)" PYTHON_TARGETS="python3_6 python3_7 -python3_5"
CFLAGS="-O3 -march=bdver4 -falign-functions=32 -falign-jumps=32:8:8 -falign-loops=32:25:8 -pipe -pthread -fira-hoist-pressure -fira-loop-pressure -fbranch-target-load-optimize -fweb -ftracer -fsched2-use-superblocks -fgraphite-identity -floop-nest-optimize -fdevirtualize-at-ltrans -fipa-pta -fno-semantic-interposition -fno-plt -flto=2 -fuse-linker-plugin -fuse-ld=bfd -fstack-protector-all -fstack-clash-protection -Wall -Wextra -Wl,-O1 -Wl,--as-needed -Wl,-O3 -Wl,-z,relro -Wl,-z,now"
CXXFLAGS="-O3 -march=bdver4 -falign-functions=32 -falign-jumps=32:8:8 -falign-loops=32:25:8 -pipe -pthread -fira-hoist-pressure -fira-loop-pressure -fbranch-target-load-optimize -fweb -ftracer -fsched2-use-superblocks -fgraphite-identity -floop-nest-optimize -fdevirtualize-at-ltrans -fipa-pta -fno-semantic-interposition -fno-plt -flto=2 -fuse-linker-plugin -fuse-ld=bfd -fstack-protector-all -fstack-clash-protection -Wall -Wextra -Wl,-O1 -Wl,--as-needed -Wl,-O3 -Wl,-z,relro -Wl,-z,now"
FEATURES="usersandbox sandbox ebuild-locks unmerge-logs merge-sync strict assume-digests usersync protect-owned ipc-sandbox unknown-features-warn distlocks pid-sandbox news network-sandbox userpriv binpkg-logs binpkg-docompress unmerge-orphans userfetch parallel-fetch multilib-strict binpkg-dostrip config-protect-if-modified preserve-libs sfperms xattr fixlafiles"

sys-devel/gcc-8.3.0-r3::gentoo was built with the following:
USE="(cxx) fortran graphite hardened (multilib) nls nptl openmp pch (pie) sanitize ssp systemtap vtv (-altivec) -debug -doc (-fixed-point) -go (-jit) (-libssp) -mpx -objc -objc++ -objc-gc -pgo -test -vanilla" ABI_X86="(64)"
CFLAGS="-march=bdver4 -pipe -fuse-ld=bfd -Wall -Wextra -Wl,-O1 -Wl,--as-needed -Wl,-O3 -O2"
CXXFLAGS="-march=bdver4 -pipe -fuse-ld=bfd -Wall -Wextra -Wl,-O1 -Wl,--as-needed -Wl,-O3 -O2"
FEATURES="userfetch protect-owned sfperms xattr network-sandbox strict binpkg-logs binpkg-dostrip usersync multilib-strict distlocks ebuild-locks news usersandbox fixlafiles assume-digests parallel-fetch binpkg-docompress ipc-sandbox config-protect-if-modified preserve-libs pid-sandbox unmerge-logs merge-sync unmerge-orphans unknown-features-warn userpriv sandbox"
LDFLAGS="-march=bdver4 -pipe -fuse-ld=bfd -Wall -Wextra -Wl,-O1 -Wl,--as-needed -Wl,-O3 -O2"

sys-devel/gcc-9.2.0-r2::gentoo was built with the following:
USE="(cxx) fortran go graphite hardened lto (multilib) nls nptl openmp pch (pie) sanitize ssp systemtap vtv (-altivec) -d -debug -doc (-fixed-point) (-jit) (-libssp) -objc -objc++ -objc-gc -pgo -test -vanilla" ABI_X86="(64)"
CFLAGS="-march=bdver4 -pipe -fuse-ld=bfd -Wall -Wextra -Wl,-O1 -Wl,--as-needed -Wl,-O3 -O2"
CXXFLAGS="-march=bdver4 -pipe -fuse-ld=bfd -Wall -Wextra -Wl,-O1 -Wl,--as-needed -Wl,-O3 -O2"
FEATURES="userfetch protect-owned sfperms xattr network-sandbox strict binpkg-logs binpkg-dostrip usersync multilib-strict distlocks ebuild-locks news usersandbox fixlafiles assume-digests parallel-fetch binpkg-docompress ipc-sandbox config-protect-if-modified preserve-libs pid-sandbox unmerge-logs merge-sync unmerge-orphans unknown-features-warn userpriv sandbox"
LDFLAGS="-march=bdver4 -pipe -fuse-ld=bfd -Wall -Wextra -Wl,-O1 -Wl,--as-needed -Wl,-O3 -O2"

dev-util/ninja-1.9.0::gentoo was built with the following:
USE="vim-syntax -doc -emacs -test" ABI_X86="(64)"
CFLAGS="-O3 -march=bdver4 -pipe -pthread -fopenmp -fira-hoist-pressure -fira-loop-pressure -fbranch-target-load-optimize -fgraphite-identity -floop-nest-optimize -fdevirtualize-at-ltrans -fipa-pta -fno-semantic-interposition -flto=3 -fuse-linker-plugin -fuse-ld=bfd -Wall -Wextra -Wno-error -Wl,-O1 -Wl,--as-needed -Wl,-O3"
CXXFLAGS="-O3 -march=bdver4 -pipe -pthread -fopenmp -fira-hoist-pressure -fira-loop-pressure -fbranch-target-load-optimize -fgraphite-identity -floop-nest-optimize -fdevirtualize-at-ltrans -fipa-pta -fno-semantic-interposition -flto=3 -fuse-linker-plugin -fuse-ld=bfd -Wall -Wextra -Wno-error -Wl,-O1 -Wl,--as-needed -Wl,-O3"
LDFLAGS="-O3 -march=bdver4 -pipe -pthread -fopenmp -fira-hoist-pressure -fira-loop-pressure -fbranch-target-load-optimize -fgraphite-identity -floop-nest-optimize -fdevirtualize-at-ltrans -fipa-pta -fno-semantic-interposition -flto=3 -fuse-linker-plugin -fuse-ld=bfd -Wall -Wextra -Wno-error -Wl,-O1 -Wl,--as-needed -Wl,-O3"

dev-lang/nasm-2.14.02::gentoo was built with the following:
USE="-doc" ABI_X86="(64)"
CFLAGS="-march=bdver4 -pipe -fuse-ld=bfd -Wall -Wextra -Wno-error -Wl,-O1 -Wl,--as-needed -Wl,-O3 -O2"
CXXFLAGS="-march=bdver4 -pipe -fuse-ld=bfd -Wall -Wextra -Wno-error -Wl,-O1 -Wl,--as-needed -Wl,-O3 -O2"
LDFLAGS="-march=bdver4 -pipe -fuse-ld=bfd -Wall -Wextra -Wno-error -Wl,-O1 -Wl,--as-needed -Wl,-O3 -O2"

*

Package Settings

media-libs/dav1d-0.5.2::gentoo was built with the following:
USE="10bit 8bit asm" ABI_X86="32 (64) -x32"
CFLAGS="-O3 -march=bdver4 -falign-functions=32 -falign-jumps=32:8:8 -falign-loops=32:25:8 -pipe -pthread -fira-hoist-pressure -fira-loop-pressure -fbranch-target-load-optimize -fweb -ftracer -fsched2-use-superblocks -fgraphite-identity -fdevirtualize-at-ltrans -fipa-pta -fno-semantic-interposition -fno-plt -flto=2 -fuse-linker-plugin -fuse-ld=bfd -fstack-protector-all -fstack-clash-protection -Wall -Wextra -Wl,-O1 -Wl,--as-needed -Wl,-O3 -Wl,-z,relro -Wl,-z,now"
CXXFLAGS="-O3 -march=bdver4 -falign-functions=32 -falign-jumps=32:8:8 -falign-loops=32:25:8 -pipe -pthread -fira-hoist-pressure -fira-loop-pressure -fbranch-target-load-optimize -fweb -ftracer -fsched2-use-superblocks -fgraphite-identity -fdevirtualize-at-ltrans -fipa-pta -fno-semantic-interposition -fno-plt -flto=2 -fuse-linker-plugin -fuse-ld=bfd -fstack-protector-all -fstack-clash-protection -Wall -Wextra -Wl,-O1 -Wl,--as-needed -Wl,-O3 -Wl,-z,relro -Wl,-z,now"
LDFLAGS="-O3 -march=bdver4 -falign-functions=32 -falign-jumps=32:8:8 -falign-loops=32:25:8 -pipe -pthread -fira-hoist-pressure -fira-loop-pressure -fbranch-target-load-optimize -fweb -ftracer -fsched2-use-superblocks -fgraphite-identity -fdevirtualize-at-ltrans -fipa-pta -fno-semantic-interposition -fno-plt -flto=2 -fuse-linker-plugin -fuse-ld=bfd -fstack-protector-all -fstack-clash-protection -Wall -Wextra -Wl,-O1 -Wl,--as-needed -Wl,-O3 -Wl,-z,relro -Wl,-z,now"

sandy@sandys-pavilion:~$ cat /etc/portage/package.cflags/dav1d.conf
media-libs/dav1d *FLAGS-="-floop-nest-optimize"

GRAPHITE="-fgraphite-identity -floop-nest-optimize"

~~~

@jiblime, it seems that the loops are out to get us. I will double-check after I rebuild @world for the holidays. Oh, also, ahemGitterahem.

Edit

I get the same result with Gold.

Edit two

Using my previous flags does not make a difference.

[wolfwood]

dav1d-0.5.2 also builds with gcc-8.3.0 successfully for me

[wolfwood]

reported to gentoo bugs as https://bugs.gentoo.org/702968
was on the fence as it might be an isl issue, but then I noticed dav1d and the scipy minimal testcase both compile successfully with gcc-8.3.0. I guess I'll see what the devs have to say.

[InBetweenNames]

Merged the test disabling patch -- will leave the issue open until this gets fixed properly upstream

[elsandosgrande]

Now... How might one actively avoid the patched package from this overlay for the purpose of actively checking on one's own system?

[pchome]

@elsandosgrande
Re-patch again w/ one more custom patch or use custom ebuild, where it should be something like

local emesonargs=(
...
-Denable_tests=true
...
)

This is how it might be fixed in gentoo, the patch was only for this overlay. For simplicity.

[wolfwood]

confirmed as an ISL regression. when 0.22.1 or 0.23 makes it into the tree, we'll be able to revert the flag filters for this and #450

EDIT: gentoo pulled a patch for this fix into 0.22-r1, which is curently available.