After llvm commit 483db1c706864d0940206228dfe64bdcd17faa4e
Author: Muhammad Omair Javaid <omair.jav...@linaro.org>

    [LLDB] Remove xfail decorator TestInferiorAssert.py AArch64/Linux

the following benchmarks slowed down by more than 2%:
- 433.milc slowed down by 4% from 13309 to 13838 perf samples
  - 433.milc:[.] mult_su3_mat_vec slowed down by 17% from 2058 to 2409 perf 
samples

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.

For your convenience, we have uploaded tarballs with pre-processed source and 
assembly files at:
- First_bad save-temps: 
https://ci.linaro.org/job/tcwg_bmk_ci_llvm-bisect-tcwg_bmk_tx1-llvm-master-aarch64-spec2k6-O3/29/artifact/artifacts/build-483db1c706864d0940206228dfe64bdcd17faa4e/save-temps/
- Last_good save-temps: 
https://ci.linaro.org/job/tcwg_bmk_ci_llvm-bisect-tcwg_bmk_tx1-llvm-master-aarch64-spec2k6-O3/29/artifact/artifacts/build-d11ec6f67e45c630ab87bfb6010dcc93e89542fc/save-temps/
- Baseline save-temps: 
https://ci.linaro.org/job/tcwg_bmk_ci_llvm-bisect-tcwg_bmk_tx1-llvm-master-aarch64-spec2k6-O3/29/artifact/artifacts/build-baseline/save-temps/

Configuration:
- Benchmark: SPEC CPU2006
- Toolchain: Clang + Glibc + LLVM Linker
- Version: all components were built from their tip of trunk
- Target: aarch64-linux-gnu
- Compiler flags: -O3
- Hardware: NVidia TX1 4x Cortex-A57

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.

THIS IS THE END OF INTERESTING STUFF.  BELOW ARE LINKS TO BUILDS, REPRODUCTION 
INSTRUCTIONS, AND THE RAW COMMIT.

This commit has regressed these CI configurations:
 - tcwg_bmk_llvm_tx1/llvm-master-aarch64-spec2k6-O3

First_bad build: 
https://ci.linaro.org/job/tcwg_bmk_ci_llvm-bisect-tcwg_bmk_tx1-llvm-master-aarch64-spec2k6-O3/29/artifact/artifacts/build-483db1c706864d0940206228dfe64bdcd17faa4e/
Last_good build: 
https://ci.linaro.org/job/tcwg_bmk_ci_llvm-bisect-tcwg_bmk_tx1-llvm-master-aarch64-spec2k6-O3/29/artifact/artifacts/build-d11ec6f67e45c630ab87bfb6010dcc93e89542fc/
Baseline build: 
https://ci.linaro.org/job/tcwg_bmk_ci_llvm-bisect-tcwg_bmk_tx1-llvm-master-aarch64-spec2k6-O3/29/artifact/artifacts/build-baseline/
Even more details: 
https://ci.linaro.org/job/tcwg_bmk_ci_llvm-bisect-tcwg_bmk_tx1-llvm-master-aarch64-spec2k6-O3/29/artifact/artifacts/

Reproduce builds:
<cut>
mkdir investigate-llvm-483db1c706864d0940206228dfe64bdcd17faa4e
cd investigate-llvm-483db1c706864d0940206228dfe64bdcd17faa4e

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

# Fetch manifests and test.sh script
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-aarch64-spec2k6-O3/29/artifact/artifacts/manifests/build-baseline.sh
 --fail
curl -o artifacts/manifests/build-parameters.sh 
https://ci.linaro.org/job/tcwg_bmk_ci_llvm-bisect-tcwg_bmk_tx1-llvm-master-aarch64-spec2k6-O3/29/artifact/artifacts/manifests/build-parameters.sh
 --fail
curl -o artifacts/test.sh 
https://ci.linaro.org/job/tcwg_bmk_ci_llvm-bisect-tcwg_bmk_tx1-llvm-master-aarch64-spec2k6-O3/29/artifact/artifacts/test.sh
 --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 483db1c706864d0940206228dfe64bdcd17faa4e
../artifacts/test.sh

# Reproduce last_good build
git checkout --detach d11ec6f67e45c630ab87bfb6010dcc93e89542fc
../artifacts/test.sh

cd ..
</cut>

Full commit (up to 1000 lines):
<cut>
commit 483db1c706864d0940206228dfe64bdcd17faa4e
Author: Muhammad Omair Javaid <omair.jav...@linaro.org>
Date:   Mon Oct 11 14:34:41 2021 +0500

    [LLDB] Remove xfail decorator TestInferiorAssert.py AArch64/Linux
    
    TestInferiorAssert.py test_inferior_asserting_disassemble passes after
    upgrading LLDB AArch64/Linux buildbot to Ubuntu Focal.
---
 lldb/test/API/functionalities/inferior-assert/TestInferiorAssert.py | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git 
a/lldb/test/API/functionalities/inferior-assert/TestInferiorAssert.py 
b/lldb/test/API/functionalities/inferior-assert/TestInferiorAssert.py
index c533a1e29a12..5ac4eeb0514a 100644
--- a/lldb/test/API/functionalities/inferior-assert/TestInferiorAssert.py
+++ b/lldb/test/API/functionalities/inferior-assert/TestInferiorAssert.py
@@ -45,9 +45,7 @@ class AssertingInferiorTestCase(TestBase):
         bugnumber="llvm.org/pr21793: need to implement support for detecting 
assertion / abort on Windows")
     @expectedFailureAll(
         oslist=["linux"],
-        archs=[
-            "aarch64",
-            "arm"],
+        archs=["arm"],
         triple=no_match(".*-android"),
         bugnumber="llvm.org/pr25338")
     @expectedFailureAll(bugnumber="llvm.org/pr26592", triple='^mips')
</cut>
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