linaro-toolchain January 2026

linaro-toolchain@lists.linaro.org

2 participants
2 discussions

Re: [Linaro-TCWG-CI] gcc-16-5975-gfae0c626250: 1 regression on master-thumb_m23_soft_eabi

by Andrew Pinski

On Wed, Jan 21, 2026 at 5:50 AM <ci_notify(a)linaro.org> wrote: > > Dear contributor, > > Our automatic CI has detected problems related to your patch(es). Please find some details below. > > In arm-eabi cortex-m23 soft, after: > | commit gcc-16-5975-gfae0c626250 > | Author: Andrew Pinski <andrew.pinski(a)oss.qualcomm.com> > | Date: Sat Dec 6 01:11:29 2025 -0800 > | > | final_cleanup: Call make_forwarders_with_degenerate_phis [PR46555] > | > | This fixes a regression introduced with r16-5258-g1d8e2d51e5c5cb. > | With GCC 12+, we would not merge forwarders (with phis, vops included), > | this meant that after the last cddce, degenerate phis would stay not > | ... 22 lines of the commit log omitted. > > Produces 1 regression: > | > | regressions.sum: > | Running gcc:gcc.dg/tree-ssa/tree-ssa.exp ... > | FAIL: gcc.dg/tree-ssa/pr46555.c scan-rtl-dump pro_and_epilogue "Performing shrink-wrapping" > > Used configuration : > *CI config* tcwg_gnu_embed_check_gcc arm-eabi -mthumb -march=armv8-m.base -mtune=cortex-m23 -mfloat-abi=soft -mfpu=auto > *configure and test flags:* --target arm-eabi --disable-multilib --with-mode=thumb --with-cpu=cortex-m23 --with-float=soft --target_board=-mthumb/-march=armv8-m.base/-mtune=cortex-m23/-mfloat-abi=soft/-mfpu=auto qemu_cpu=cortex-m33 > > We track this bug report under https://linaro.atlassian.net/browse/GNU-1819. Please let us know if you have a fix. Filed https://gcc.gnu.org/bugzilla/show_bug.cgi?id=123751 and fixed in r16-6969-g41878c161c480. Thanks, Andrew > > If you have any questions regarding this report, please ask on linaro-toolchain(a)lists.linaro.org mailing list. > > -----------------8<--------------------------8<--------------------------8<-------------------------- > > The information below contains the details of the failures, and the ways to reproduce a debug environment: > > You can find the failure logs in *.log.1.xz files in > * https://ci.linaro.org/job/tcwg_gnu_embed_check_gcc--master-thumb_m23_soft_e… > The full lists of regressions and improvements as well as configure and make commands are in > * https://ci.linaro.org/job/tcwg_gnu_embed_check_gcc--master-thumb_m23_soft_e… > The list of [ignored] baseline and flaky failures are in > * https://ci.linaro.org/job/tcwg_gnu_embed_check_gcc--master-thumb_m23_soft_e… > > Current build : https://ci.linaro.org/job/tcwg_gnu_embed_check_gcc--master-thumb_m23_soft_e… > Reference build : https://ci.linaro.org/job/tcwg_gnu_embed_check_gcc--master-thumb_m23_soft_e… > > Instruction to reproduce the build : https://gitlab.com/LinaroLtd/tcwg/ci/interesting-commits/-/raw/master/gcc/s… > > Full commit : See in git+ssh://linaroci@gcc.gnu.org/git/gcc.git

5 days, 5 hours

Re: [Linaro-TCWG-CI] gcc-16-6301-gb3c167b61fd7: 4 regressions on arm

by Tomasz Kaminski

Hi, This should be resolved by following commit that I have just pushed: commit 5513935f48e50e97c854b746e758842c846a7740 Author: Tomasz Kamiński <tkaminsk(a)redhat.com> Date: Wed Jan 7 17:24:55 2026 +0100 libstdc++: Use tree-dump-gimple in variant constant init tests. Use of scan-assembler-dem for matching against debug symbols, turned out to not be portable, as they representation in assembly output differs between platforms: arm use 60 columns limit, emitting multiple rows, and some platforms may encode them using base64. We use tree-dump-gimple instead, that outputs a constructor name portably, allowing us to simply match for invocation of constructor for given type, as each variable has different type. To use scan-tree-dump(-not) we load scantree.exp file and it's dependency scandump.exp from gcc/testsuite/lib. libstdc++-v3/ChangeLog: * testsuite/20_util/variant/constinit.cc: Use scan-tree-dump for matching of constructor. * testsuite/20_util/variant/constinit_compat.cc: Likewise. * testsuite/lib/libstdc++.exp: Load scantree.exp and scandump.exp. Regards, Tomasz On Thu, Dec 25, 2025 at 8:42 AM <ci_notify(a)linaro.org> wrote: > Dear contributor, > > Our automatic CI has detected problems related to your patch(es). Please > find some details below. > > In master-arm, after: > | commit gcc-16-6301-gb3c167b61fd7 > | Author: Tomasz Kamiński <tkaminsk(a)redhat.com> > | Date: Thu Dec 11 10:43:44 2025 +0100 > | > | libstdc++: Use union to store non-trivially destructible types in > C++17 mode [PR112591] > | > | This patch disables use of specialization _Uninitialized<_Type, > false> for > | non-trivially destructible types by default in C++17, and > fallbacks to > | the primary template, that stores the type in union directly. > This makes the > | ... 39 lines of the commit log omitted. > > Produces 4 regressions: > | > | regressions.sum: > | Running libstdc++:libstdc++-dg/conformance.exp ... > | FAIL: 20_util/variant/constinit.cc -std=gnu++20 scan-assembler-dem > (std::in_place_index_t<1ul?>, double&&) > | FAIL: 20_util/variant/constinit.cc -std=gnu++20 scan-assembler-dem > (std::in_place_index_t<1ul?>, int&&) > | FAIL: 20_util/variant/constinit_compat.cc -std=gnu++20 > scan-assembler-dem (std::in_place_index_t<1ul?>, double&&) > | FAIL: 20_util/variant/constinit_compat.cc -std=gnu++20 > scan-assembler-dem (std::in_place_index_t<1ul?>, int&&) > > Used configuration : > *CI config* tcwg_gnu_cross_check_gcc master-arm > *configure and test flags:* --target arm-linux-gnueabihf > > We track this bug report under > https://linaro.atlassian.net/browse/GNU-1793. Please let us know if you > have a fix. > > If you have any questions regarding this report, please ask on > linaro-toolchain(a)lists.linaro.org mailing list. > > > -----------------8<--------------------------8<--------------------------8<-------------------------- > > The information below contains the details of the failures, and the ways > to reproduce a debug environment: > > You can find the failure logs in *.log.1.xz files in > * > https://ci.linaro.org/job/tcwg_gnu_cross_check_gcc--master-arm-build/2498/a… > The full lists of regressions and improvements as well as configure and > make commands are in > * > https://ci.linaro.org/job/tcwg_gnu_cross_check_gcc--master-arm-build/2498/a… > The list of [ignored] baseline and flaky failures are in > * > https://ci.linaro.org/job/tcwg_gnu_cross_check_gcc--master-arm-build/2498/a… > > Current build : > https://ci.linaro.org/job/tcwg_gnu_cross_check_gcc--master-arm-build/2498/a… > Reference build : > https://ci.linaro.org/job/tcwg_gnu_cross_check_gcc--master-arm-build/2497/a… > > Instruction to reproduce the build : > https://gitlab.com/LinaroLtd/tcwg/ci/interesting-commits/-/raw/master/gcc/s… > > Full commit : See in git+ssh://linaroci@gcc.gnu.org/git/gcc.git

2 weeks, 5 days

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linaro-toolchain January 2026