Successfully identified regression in *gcc* in CI configuration tcwg_bmk_llvm_apm/llvm-master-aarch64-spec2k6-Oz. So far, this commit has regressed CI configurations: - tcwg_bmk_llvm_apm/llvm-master-aarch64-spec2k6-Oz

Culprit: <cut> commit fd26ce83981c6b50519805500272ab26b4e4c4b0 Author: Jeff Law jlaw@localhost.localdomain Date: Sun Aug 8 11:20:41 2021 -0400

Fix c6x test compromised by recent improvements to bswap & rotates

gcc/testsuite * gcc.target/tic6x/rotdi16-scan.c: Pull rotate into its own function. </cut>

Results regressed to (for first_bad == fd26ce83981c6b50519805500272ab26b4e4c4b0) # reset_artifacts: -10 # build_abe binutils: -9 # build_abe stage1 -- --set gcc_override_configure=--disable-libsanitizer: -8 # build_abe linux: -7 # build_abe glibc: -6 # build_abe stage2 -- --set gcc_override_configure=--disable-libsanitizer: -5 # build_llvm true: -3 # true: 0 # benchmark -- -Oz artifacts/build-fd26ce83981c6b50519805500272ab26b4e4c4b0/results_id: 1 # 482.sphinx3,[.] OUTLINED_FUNCTION_4 regressed by 117

from (for last_good == e9b639c4b532212ca92b2261f820768993770daa) # reset_artifacts: -10 # build_abe binutils: -9 # build_abe stage1 -- --set gcc_override_configure=--disable-libsanitizer: -8 # build_abe linux: -7 # build_abe glibc: -6 # build_abe stage2 -- --set gcc_override_configure=--disable-libsanitizer: -5 # build_llvm true: -3 # true: 0 # benchmark -- -Oz artifacts/build-e9b639c4b532212ca92b2261f820768993770daa/results_id: 1

Artifacts of last_good build: https://ci.linaro.org/job/tcwg_bmk_ci_llvm-bisect-tcwg_bmk_apm-llvm-master-a... Results ID of last_good: apm_64/tcwg_bmk_llvm_apm/bisect-llvm-master-aarch64-spec2k6-Oz/3651 Artifacts of first_bad build: https://ci.linaro.org/job/tcwg_bmk_ci_llvm-bisect-tcwg_bmk_apm-llvm-master-a... Results ID of first_bad: apm_64/tcwg_bmk_llvm_apm/bisect-llvm-master-aarch64-spec2k6-Oz/3643 Build top page/logs: https://ci.linaro.org/job/tcwg_bmk_ci_llvm-bisect-tcwg_bmk_apm-llvm-master-a...

Configuration details:

Reproduce builds: <cut> mkdir investigate-gcc-fd26ce83981c6b50519805500272ab26b4e4c4b0 cd investigate-gcc-fd26ce83981c6b50519805500272ab26b4e4c4b0

git clone https://git.linaro.org/toolchain/jenkins-scripts

mkdir -p artifacts/manifests curl -o artifacts/manifests/build-baseline.sh https://ci.linaro.org/job/tcwg_bmk_ci_llvm-bisect-tcwg_bmk_apm-llvm-master-a... --fail curl -o artifacts/manifests/build-parameters.sh https://ci.linaro.org/job/tcwg_bmk_ci_llvm-bisect-tcwg_bmk_apm-llvm-master-a... --fail curl -o artifacts/test.sh https://ci.linaro.org/job/tcwg_bmk_ci_llvm-bisect-tcwg_bmk_apm-llvm-master-a... --fail chmod +x artifacts/test.sh

# Reproduce the baseline build (build all pre-requisites) ./jenkins-scripts/tcwg_bmk-build.sh @@ artifacts/manifests/build-baseline.sh

# Save baseline build state (which is then restored in artifacts/test.sh) mkdir -p ./bisect rsync -a --del --delete-excluded --exclude /bisect/ --exclude /artifacts/ --exclude /gcc/ ./ ./bisect/baseline/

cd gcc

# Reproduce first_bad build git checkout --detach fd26ce83981c6b50519805500272ab26b4e4c4b0 ../artifacts/test.sh

# Reproduce last_good build git checkout --detach e9b639c4b532212ca92b2261f820768993770daa ../artifacts/test.sh

cd .. </cut>

History of pending regressions and results: https://git.linaro.org/toolchain/ci/base-artifacts.git/log/?h=linaro-local/c...

Artifacts: https://ci.linaro.org/job/tcwg_bmk_ci_llvm-bisect-tcwg_bmk_apm-llvm-master-a... Build log: https://ci.linaro.org/job/tcwg_bmk_ci_llvm-bisect-tcwg_bmk_apm-llvm-master-a...

Full commit (up to 1000 lines): <cut> commit fd26ce83981c6b50519805500272ab26b4e4c4b0 Author: Jeff Law jlaw@localhost.localdomain Date: Sun Aug 8 11:20:41 2021 -0400

Fix c6x test compromised by recent improvements to bswap & rotates

gcc/testsuite * gcc.target/tic6x/rotdi16-scan.c: Pull rotate into its own function. --- gcc/testsuite/gcc.target/tic6x/rotdi16-scan.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/gcc/testsuite/gcc.target/tic6x/rotdi16-scan.c b/gcc/testsuite/gcc.target/tic6x/rotdi16-scan.c index 4d7816c1537..550418324e6 100644 --- a/gcc/testsuite/gcc.target/tic6x/rotdi16-scan.c +++ b/gcc/testsuite/gcc.target/tic6x/rotdi16-scan.c @@ -7,10 +7,14 @@

unsigned long long z = 0x012389ab4567cdefull;

+unsigned long long __attribute__ ((noinline,noclone,noipa)) bar () +{ + return (z << 48) | (z >> 16); +} + int main () { - unsigned long long z2 = (z << 48) | (z >> 16); - if (z2 != 0xcdef012389ab4567ull) + if (bar() != 0xcdef012389ab4567ull) abort (); exit (0); } </cut>