Oh, I see this is tracked in https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111544 .

-- Maxim Kuvyrkov https://www.linaro.org

On Sep 27, 2023, at 13:47, Maxim Kuvyrkov maxim.kuvyrkov@linaro.org wrote:

Hi Patrick,

Did you already get any bug reports for gcc-14-4111-g6e92a6a2a72 ?

In our benchmarking we see that 483.xalancbmk (from SPEC CPU2006) fails to build on 32-bit ARM. Let me know if you need any help in reproducing and troubleshooting this.

Thanks!

-- Maxim Kuvyrkov https://www.linaro.org

...

On Sep 27, 2023, at 11:05, ci_notify@linaro.org wrote:

Dear contributor, our automatic CI has detected problems related to your patch(es). Please find some details below. If you have any questions, please follow up on linaro-toolchain@lists.linaro.org mailing list, Libera's #linaro-tcwg channel, or ping your favourite Linaro toolchain developer on the usual project channel.

In CI config tcwg_bmk-code_speed-spec2k6/gnu-arm-master-O3 after:

| commit gcc-14-4111-g6e92a6a2a72 | Author: Patrick Palka ppalka@redhat.com | Date: Mon Sep 18 14:47:52 2023 -0400 | | c++: non-dependent assignment checking [PR63198, PR18474] | | This patch makes us recognize and check non-dependent simple assigments | ahead of time, like we already do for compound assignments. This means | the templated representation of such assignments will now usually have | an implicit INDIRECT_REF (due to the reference return type), which the | -Wparentheses code needs to handle. As a drive-by improvement, this | ... 51 lines of the commit log omitted.

the following benchmarks slowed down by more than 3%:

• 483.xalancbmk failed to build

Below reproducer instructions can be used to re-build both "first_bad" and "last_good" cross-toolchains used in this bisection. Naturally, the scripts will fail when triggerring benchmarking jobs if you don't have access to Linaro TCWG CI.

Configuration:

• Benchmark:
• Toolchain: GCC + Glibc + GNU Linker
• Version: all components were built from their tip of trunk
• Target: arm-linux-gnueabihf
• Compiler flags: O3
• Hardware: NVidia TK1 4x Cortex-A15

This benchmarking CI is work-in-progress, and we welcome feedback and suggestions at linaro-toolchain@lists.linaro.org . In our improvement plans is to add support for SPEC CPU2017 benchmarks and provide "perf report/annotate" data behind these reports.

-----------------8<--------------------------8<--------------------------8<-------------------------- The information below can be used to reproduce a debug environment:

Current build : https://ci.linaro.org/job/tcwg_bmk-code_speed-spec2k6--gnu-arm-master-O3-bui... Reference build : https://ci.linaro.org/job/tcwg_bmk-code_speed-spec2k6--gnu-arm-master-O3-bui...

Reproduce last good and first bad builds: https://git-us.linaro.org/toolchain/ci/interesting-commits.git/plain/gcc/sha...

Full commit : https://github.com/gcc-mirror/gcc/commit/6e92a6a2a72d3b7a5e1b29042d8a6a43fe1...

Latest bug report status : https://linaro.atlassian.net/browse/GNU-951

List of configurations that regressed due to this commit :

• tcwg_bmk-code_speed-spec2k6

** gnu-arm-master-O3 *** 483.xalancbmk failed to build *** https://git-us.linaro.org/toolchain/ci/interesting-commits.git/plain/gcc/sha... *** https://ci.linaro.org/job/tcwg_bmk-code_speed-spec2k6--gnu-arm-master-O3-bui...