New subject: [Linaro-TCWG-CI] llvmorg-22-init-6821-ga103b9b207f6: 1 regression on aarch64

10 Sep 2025


      Thanks for the report. There is also an LLVM issue tracking this. I commented there: https://github.com/llvm/llvm-project/issues/157763#issuecomment-3273773003
The test is violating F2023 C15121 that is not properly enforced by flang semantics but that lowering now relies on.
Although we will likely improve LEN lowering which would have the side effect of working around the segfault in the specific case of 0727_0008, I think we will enforce C15121 in a manner that will reject it.
See The LLVM link for more details and suggestion on how to fix the test.
Jean Perier
-----Original Message-----
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Sent: Wednesday, September 10, 2025 6:12 AM
To: ohno.yasuyuki@fujitsu.com; itou.tetsuya@fujitsu.com; t-kawashima@fujitsu.com
Cc: maxim.kuvyrkov@linaro.org; Jean Perier jperier@nvidia.com
Subject: [Linaro-TCWG-CI] llvmorg-22-init-6821-ga103b9b207f6: 1 regression on aarch64
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Dear contributor,
Our automatic CI has detected problems related to your patch(es). Please find some details below.
In tcwg_flang_test/main-aarch64-O0-debug, after:
  | commit llvmorg-22-init-6821-ga103b9b207f6
  | Author: jeanPerier jperier@nvidia.com
  | Date:   Mon Sep 8 12:07:37 2025 +0200
  |
  |     [flang][lowering] fix vector subscripts in character elemental procedures (#156661)
  |
  |     Fixes https://github.com/llvm/llvm-project/issues/145151
  |
  |     Character elemental procedures require evaluating the result
  | ... 22 lines of the commit log omitted.
Produces 1 regression:
  |
  | regressions.sum:
  | Running test-suite:Fujitsu/Fortran/0727 ...
  | FAIL: test-suite :: Fujitsu/Fortran/0727/Fujitsu-Fortran-0727_0008.test
  | # "FAIL" means : the execution of the compiled binary failed / output of the binary differs from the expected one
Used configuration :
  * Toolchain : cmake -G Ninja  ../llvm/llvm "-DLLVM_ENABLE_PROJECTS=clang;lld;flang;clang-tools-extra"           "-DLLVM_ENABLE_RUNTIMES=openmp"         -DCMAKE_BUILD_TYPE=Release -DLLVM_ENABLE_ASSERTIONS=True        -DCMAKE_INSTALL_PREFIX=../llvm-install          "-DLLVM_TARGETS_TO_BUILD=AArch64" -DCLANG_DEFAULT_LINKER=lld
  * Testsuite : export LD_LIBRARY_PATH=$\WORKSPACE/llvm-install/lib/aarch64-unknown-linux-gnu${LD_LIBRARY_PATH:+:$\LD_LIBRARY_PATH}
 cmake -GNinja  -DCMAKE_C_COMPILER="$\WORKSPACE/llvm-install/bin2/clang"        -DCMAKE_CXX_COMPILER="$\WORKSPACE/llvm-install/bin2/clang++"    -DCMAKE_Fortran_COMPILER="$\WORKSPACE/llvm-install/bin2/flang-new"      -DCMAKE_BUILD_TYPE=Release      -DCMAKE_C_FLAGS= -DCMAKE_CXX_FLAGS= -DCMAKE_Fortran_FLAGS=      -DCMAKE_C_FLAGS_RELEASE="-O0 -g"        -DCMAKE_CXX_FLAGS_RELEASE="-O0 -g"      -DCMAKE_Fortran_FLAGS_RELEASE="-O0 -g"  -DTEST_SUITE_FORTRAN=ON         -DTEST_SUITE_SUBDIRS=Fujitsu            "$\WORKSPACE/test/test-suite"
We track this bug report under https://linaro.atlassian.net/browse/LLVM-2088. 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.
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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_flang_test--main-aarch64-O0-debug-build/1378/...
The full lists of regressions and improvements as well as configure and make commands are in
 * https://ci.linaro.org/job/tcwg_flang_test--main-aarch64-O0-debug-build/1378/...
The list of [ignored] baseline and flaky failures are in
 * https://ci.linaro.org/job/tcwg_flang_test--main-aarch64-O0-debug-build/1378/...
Fujitsu testsuite : https://github.com/fujitsu/compiler-test-suite/
Current build   : https://ci.linaro.org/job/tcwg_flang_test--main-aarch64-O0-debug-build/1378/...
Reference build : https://ci.linaro.org/job/tcwg_flang_test--main-aarch64-O0-debug-build/1377/...
Instruction to reproduce the build : https://gitlab.com/LinaroLtd/tcwg/ci/interesting-commits/-/raw/master/llvm/s...
Full commit : https://github.com/llvm/llvm-project/commit/a103b9b207f67e0afbaf41647a56a4cb...

RE: [Linaro-TCWG-CI] llvmorg-22-init-6821-ga103b9b207f6: 1 regression on aarch64