Successfully identified regression in *llvm* in CI configuration tcwg_bmk_llvm_tx1/llvm-master-aarch64-spec2k6-O3. So far, this commit has regressed CI configurations: - tcwg_bmk_llvm_tx1/llvm-master-aarch64-spec2k6-O3

Culprit: <cut> commit 0fb299072c5b26396ab84002445570f296be44b3 Author: Jez Ng jezng@fb.com Date: Sun Jul 11 21:34:31 2021 -0400

[lld-macho][nfc] Fix YAML input in compact-unwind-sym-relocs.s

* Adjust strsize so llvm-objdump doesn't complain about it extending past the end of file * Remove symbol that was referencing a deleted section * Adjust n_sect of the remaining `_main` symbol to point at the right section </cut>

Results regressed to (for first_bad == 0fb299072c5b26396ab84002445570f296be44b3) # 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 -- -O3 artifacts/build-0fb299072c5b26396ab84002445570f296be44b3/results_id: 1 # 433.milc,milc_base.default regressed by 105 # 433.milc,[.] mult_su3_mat_vec regressed by 132

from (for last_good == a7b7b5dfe5a931a76cbe8410e5a9f55beea73c8e) # 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 -- -O3 artifacts/build-a7b7b5dfe5a931a76cbe8410e5a9f55beea73c8e/results_id: 1

Artifacts of last_good build: https://ci.linaro.org/job/tcwg_bmk_ci_llvm-bisect-tcwg_bmk_tx1-llvm-master-a... Results ID of last_good: tx1_64/tcwg_bmk_llvm_tx1/bisect-llvm-master-aarch64-spec2k6-O3/2801 Artifacts of first_bad build: https://ci.linaro.org/job/tcwg_bmk_ci_llvm-bisect-tcwg_bmk_tx1-llvm-master-a... Results ID of first_bad: tx1_64/tcwg_bmk_llvm_tx1/bisect-llvm-master-aarch64-spec2k6-O3/2794 Build top page/logs: https://ci.linaro.org/job/tcwg_bmk_ci_llvm-bisect-tcwg_bmk_tx1-llvm-master-a...

Configuration details:

Reproduce builds: <cut> mkdir investigate-llvm-0fb299072c5b26396ab84002445570f296be44b3 cd investigate-llvm-0fb299072c5b26396ab84002445570f296be44b3

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_tx1-llvm-master-a... --fail curl -o artifacts/manifests/build-parameters.sh https://ci.linaro.org/job/tcwg_bmk_ci_llvm-bisect-tcwg_bmk_tx1-llvm-master-a... --fail curl -o artifacts/test.sh https://ci.linaro.org/job/tcwg_bmk_ci_llvm-bisect-tcwg_bmk_tx1-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 /llvm/ ./ ./bisect/baseline/

cd llvm

# Reproduce first_bad build git checkout --detach 0fb299072c5b26396ab84002445570f296be44b3 ../artifacts/test.sh

# Reproduce last_good build git checkout --detach a7b7b5dfe5a931a76cbe8410e5a9f55beea73c8e ../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_tx1-llvm-master-a... Build log: https://ci.linaro.org/job/tcwg_bmk_ci_llvm-bisect-tcwg_bmk_tx1-llvm-master-a...

Full commit (up to 1000 lines): <cut> commit 0fb299072c5b26396ab84002445570f296be44b3 Author: Jez Ng jezng@fb.com Date: Sun Jul 11 21:34:31 2021 -0400

[lld-macho][nfc] Fix YAML input in compact-unwind-sym-relocs.s

* Adjust strsize so llvm-objdump doesn't complain about it extending past the end of file * Remove symbol that was referencing a deleted section * Adjust n_sect of the remaining `_main` symbol to point at the right section --- lld/test/MachO/compact-unwind-sym-relocs.s | 11 +++-------- 1 file changed, 3 insertions(+), 8 deletions(-)

diff --git a/lld/test/MachO/compact-unwind-sym-relocs.s b/lld/test/MachO/compact-unwind-sym-relocs.s index e87c3330841a..ff0896fd0daf 100644 --- a/lld/test/MachO/compact-unwind-sym-relocs.s +++ b/lld/test/MachO/compact-unwind-sym-relocs.s @@ -76,7 +76,7 @@ LoadCommands: content: '0000000000000000010000000000020200000000000000000000000000000000' relocations: - address: 0x00000000 - symbolnum: 1 + symbolnum: 0 pcrel: false length: 3 extern: true @@ -86,16 +86,11 @@ LoadCommands: - cmd: LC_SYMTAB cmdsize: 24 symoff: 520 - nsyms: 2 + nsyms: 1 stroff: 552 - strsize: 24 + strsize: 8 LinkEditData: NameList: - - n_strx: 8 - n_type: 0x0E - n_sect: 2 - n_desc: 0 - n_value: 8 - n_strx: 2 n_type: 0x0F n_sect: 1 </cut>