Dear contributor, Our automatic CI has detected problems related to your patch(es). Please find some details below. In arm-eabi cortex-m0 soft, after: | commit gcc-16-4739-g0919526efcb1 | Author: Robin Dapp | Date: Fri Oct 17 11:07:17 2025 +0200 | | niter: Use ranger to query ctz range. | | When niter runs after the copy-header pass it sometimes fails to | simplify assumptions in a ctz loop. | As the assumption is a simple nonzero test here we can have | ... 26 lines of the commit log omitted. Produces 3 regressions: | | regressions.sum: | Running gcc:gcc.dg/tree-ssa/tree-ssa.exp ... | FAIL: gcc.dg/tree-ssa/ctz-ch.c scan-tree-dump-times optimized "__builtin_ctz|\\.CTZ" 1 | Running libstdc++:libstdc++-dg/conformance.exp ... | FAIL: tr2/dynamic_bitset/pr92059.cc -std=gnu++17 (test for excess errors) | UNRESOLVED: tr2/dynamic_bitset/pr92059.cc -std=gnu++17 compilation failed to produce executable Used configuration : *CI config* tcwg_gnu_embed_check_gcc arm-eabi -mthumb -march=armv6s-m -mtune=cortex-m0 -mfloat-abi=soft -mfpu=auto *configure and test flags:* --target arm-eabi --disable-multilib --with-mode=thumb --with-cpu=cortex-m0 --with-float=soft --target_board=-mthumb/-march=armv6s-m/-mtune=cortex-m0/-mfloat-abi=soft/-mfpu=auto qemu_cpu=cortex-m0 We track this bug report under https://linaro.atlassian.net/browse/GNU-1739. Please let us know if you have a fix. If you have any questions regarding this report, please ask on linaro-toolchain@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_m0_soft_eabi-build/551/artifact/artifacts/00-sumfiles/ 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_m0_soft_eabi-build/551/artifact/artifacts/notify/ The list of [ignored] baseline and flaky failures are in * https://ci.linaro.org/job/tcwg_gnu_embed_check_gcc--master-thumb_m0_soft_eabi-build/551/artifact/artifacts/sumfiles/xfails.xfail Current build : https://ci.linaro.org/job/tcwg_gnu_embed_check_gcc--master-thumb_m0_soft_eabi-build/551/artifact/artifacts Reference build : https://ci.linaro.org/job/tcwg_gnu_embed_check_gcc--master-thumb_m0_soft_eabi-build/550/artifact/artifacts Instruction to reproduce the build : https://gitlab.com/LinaroLtd/tcwg/ci/interesting-commits/-/raw/master/gcc/sha1/0919526efcb156a17947a2fc68d7aaa487e273ae/tcwg_gnu_embed_check_gcc/master-thumb_m0_soft_eabi/reproduction_instructions.txt Full commit : See in git+ssh://linaroci@gcc.gnu.org/git/gcc.git