[clang] [clang][LifetimeSafety] Short-circuit joins of identical immutable containers (PR #208908)

LLVM Continuous Integration via cfe-commits cfe-commits at lists.llvm.org
Sat Jul 11 08:43:04 PDT 2026 

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `openmp-offload-amdgpu-runtime-2` running on `rocm-worker-hw-02` while building `clang` at step 3 "annotate".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/10/builds/31662

<details>
<summary>Here is the relevant piece of the build log for the reference</summary>

```
Step 3 (annotate) failure: 'python ../llvm.src/offload/ci/openmp-offload-amdgpu-libc-runtime.py ...' (failure)
...
PASS: libomp :: tasking/nested_parallel_tasking.c (252 of 481)
PASS: libomp :: ompt/worksharing/for/guided_split.c (253 of 481)
PASS: libomp :: tasking/omp_task_priority.c (254 of 481)
PASS: libomp :: ompt/tasks/taskloop.c (255 of 481)
PASS: libomp :: tasking/omp_task_red_taskloop.c (256 of 481)
PASS: libomp :: tasking/omp_taskloop_taskwait.c (257 of 481)
PASS: libomp :: tasking/nested_task_creation.c (258 of 481)
PASS: libomp :: ompt/loadtool/tool_not_available.c (259 of 481)
PASS: libomp :: tasking/omp_task_priority2.c (260 of 481)
PASS: libomp :: tasking/omp_task_firstprivate.c (261 of 481)
FAIL: libarcher :: races/parallel-simple.c (262 of 481)
******************** TEST 'libarcher :: races/parallel-simple.c' FAILED ********************
Exit Code: 1

Command Output (stdout):
--
# RUN: at line 13
/home/botworker/builds/openmp-offload-amdgpu-runtime-2/build/llvm.build/./bin/clang -fopenmp  -gdwarf-4 -O1 -fsanitize=thread  -I /home/botworker/builds/openmp-offload-amdgpu-runtime-2/llvm.src/openmp/tools/archer/tests -I /home/botworker/builds/openmp-offload-amdgpu-runtime-2/build/llvm.build/runtimes/runtimes-bins/openmp/runtime/src -L /home/botworker/builds/openmp-offload-amdgpu-runtime-2/build/llvm.build/runtimes/runtimes-bins/openmp/runtime/src -Wl,-rpath,/home/botworker/builds/openmp-offload-amdgpu-runtime-2/build/llvm.build/runtimes/runtimes-bins/openmp/runtime/src   /home/botworker/builds/openmp-offload-amdgpu-runtime-2/llvm.src/openmp/tools/archer/tests/races/parallel-simple.c -o /home/botworker/builds/openmp-offload-amdgpu-runtime-2/build/llvm.build/runtimes/runtimes-bins/openmp/tools/archer/tests/races/Output/parallel-simple.c.tmp -latomic && env TSAN_OPTIONS='ignore_noninstrumented_modules=0:ignore_noninstrumented_modules=1' /home/botworker/builds/openmp-offload-amdgpu-runtime-2/llvm.src/openmp/tools/archer/tests/deflake.bash /home/botworker/builds/openmp-offload-amdgpu-runtime-2/build/llvm.build/runtimes/runtimes-bins/openmp/tools/archer/tests/races/Output/parallel-simple.c.tmp 2>&1 | tee /home/botworker/builds/openmp-offload-amdgpu-runtime-2/build/llvm.build/runtimes/runtimes-bins/openmp/tools/archer/tests/races/Output/parallel-simple.c.tmp.log | /home/botworker/builds/openmp-offload-amdgpu-runtime-2/build/llvm.build/./bin/FileCheck /home/botworker/builds/openmp-offload-amdgpu-runtime-2/llvm.src/openmp/tools/archer/tests/races/parallel-simple.c
# executed command: /home/botworker/builds/openmp-offload-amdgpu-runtime-2/build/llvm.build/./bin/clang -fopenmp -gdwarf-4 -O1 -fsanitize=thread -I /home/botworker/builds/openmp-offload-amdgpu-runtime-2/llvm.src/openmp/tools/archer/tests -I /home/botworker/builds/openmp-offload-amdgpu-runtime-2/build/llvm.build/runtimes/runtimes-bins/openmp/runtime/src -L /home/botworker/builds/openmp-offload-amdgpu-runtime-2/build/llvm.build/runtimes/runtimes-bins/openmp/runtime/src -Wl,-rpath,/home/botworker/builds/openmp-offload-amdgpu-runtime-2/build/llvm.build/runtimes/runtimes-bins/openmp/runtime/src /home/botworker/builds/openmp-offload-amdgpu-runtime-2/llvm.src/openmp/tools/archer/tests/races/parallel-simple.c -o /home/botworker/builds/openmp-offload-amdgpu-runtime-2/build/llvm.build/runtimes/runtimes-bins/openmp/tools/archer/tests/races/Output/parallel-simple.c.tmp -latomic
# note: command had no output on stdout or stderr
# executed command: env TSAN_OPTIONS=ignore_noninstrumented_modules=0:ignore_noninstrumented_modules=1 /home/botworker/builds/openmp-offload-amdgpu-runtime-2/llvm.src/openmp/tools/archer/tests/deflake.bash /home/botworker/builds/openmp-offload-amdgpu-runtime-2/build/llvm.build/runtimes/runtimes-bins/openmp/tools/archer/tests/races/Output/parallel-simple.c.tmp
# note: command had no output on stdout or stderr
# executed command: tee /home/botworker/builds/openmp-offload-amdgpu-runtime-2/build/llvm.build/runtimes/runtimes-bins/openmp/tools/archer/tests/races/Output/parallel-simple.c.tmp.log
# note: command had no output on stdout or stderr
# executed command: /home/botworker/builds/openmp-offload-amdgpu-runtime-2/build/llvm.build/./bin/FileCheck /home/botworker/builds/openmp-offload-amdgpu-runtime-2/llvm.src/openmp/tools/archer/tests/races/parallel-simple.c
# note: command had no output on stdout or stderr
# RUN: at line 14
/home/botworker/builds/openmp-offload-amdgpu-runtime-2/build/llvm.build/./bin/clang -fopenmp  -gdwarf-4 -O1 -fsanitize=thread  -I /home/botworker/builds/openmp-offload-amdgpu-runtime-2/llvm.src/openmp/tools/archer/tests -I /home/botworker/builds/openmp-offload-amdgpu-runtime-2/build/llvm.build/runtimes/runtimes-bins/openmp/runtime/src -L /home/botworker/builds/openmp-offload-amdgpu-runtime-2/build/llvm.build/runtimes/runtimes-bins/openmp/runtime/src -Wl,-rpath,/home/botworker/builds/openmp-offload-amdgpu-runtime-2/build/llvm.build/runtimes/runtimes-bins/openmp/runtime/src   /home/botworker/builds/openmp-offload-amdgpu-runtime-2/llvm.src/openmp/tools/archer/tests/races/parallel-simple.c -o /home/botworker/builds/openmp-offload-amdgpu-runtime-2/build/llvm.build/runtimes/runtimes-bins/openmp/tools/archer/tests/races/Output/parallel-simple.c.tmp -latomic && env ARCHER_OPTIONS="ignore_serial=1 report_data_leak=1" env TSAN_OPTIONS='ignore_noninstrumented_modules=0:ignore_noninstrumented_modules=1' /home/botworker/builds/openmp-offload-amdgpu-runtime-2/llvm.src/openmp/tools/archer/tests/deflake.bash /home/botworker/builds/openmp-offload-amdgpu-runtime-2/build/llvm.build/runtimes/runtimes-bins/openmp/tools/archer/tests/races/Output/parallel-simple.c.tmp 2>&1 | tee /home/botworker/builds/openmp-offload-amdgpu-runtime-2/build/llvm.build/runtimes/runtimes-bins/openmp/tools/archer/tests/races/Output/parallel-simple.c.tmp.log | /home/botworker/builds/openmp-offload-amdgpu-runtime-2/build/llvm.build/./bin/FileCheck /home/botworker/builds/openmp-offload-amdgpu-runtime-2/llvm.src/openmp/tools/archer/tests/races/parallel-simple.c
# executed command: /home/botworker/builds/openmp-offload-amdgpu-runtime-2/build/llvm.build/./bin/clang -fopenmp -gdwarf-4 -O1 -fsanitize=thread -I /home/botworker/builds/openmp-offload-amdgpu-runtime-2/llvm.src/openmp/tools/archer/tests -I /home/botworker/builds/openmp-offload-amdgpu-runtime-2/build/llvm.build/runtimes/runtimes-bins/openmp/runtime/src -L /home/botworker/builds/openmp-offload-amdgpu-runtime-2/build/llvm.build/runtimes/runtimes-bins/openmp/runtime/src -Wl,-rpath,/home/botworker/builds/openmp-offload-amdgpu-runtime-2/build/llvm.build/runtimes/runtimes-bins/openmp/runtime/src /home/botworker/builds/openmp-offload-amdgpu-runtime-2/llvm.src/openmp/tools/archer/tests/races/parallel-simple.c -o /home/botworker/builds/openmp-offload-amdgpu-runtime-2/build/llvm.build/runtimes/runtimes-bins/openmp/tools/archer/tests/races/Output/parallel-simple.c.tmp -latomic
# note: command had no output on stdout or stderr
# executed command: env 'ARCHER_OPTIONS=ignore_serial=1 report_data_leak=1' env TSAN_OPTIONS=ignore_noninstrumented_modules=0:ignore_noninstrumented_modules=1 /home/botworker/builds/openmp-offload-amdgpu-runtime-2/llvm.src/openmp/tools/archer/tests/deflake.bash /home/botworker/builds/openmp-offload-amdgpu-runtime-2/build/llvm.build/runtimes/runtimes-bins/openmp/tools/archer/tests/races/Output/parallel-simple.c.tmp
# note: command had no output on stdout or stderr
# executed command: tee /home/botworker/builds/openmp-offload-amdgpu-runtime-2/build/llvm.build/runtimes/runtimes-bins/openmp/tools/archer/tests/races/Output/parallel-simple.c.tmp.log
# note: command had no output on stdout or stderr
# executed command: /home/botworker/builds/openmp-offload-amdgpu-runtime-2/build/llvm.build/./bin/FileCheck /home/botworker/builds/openmp-offload-amdgpu-runtime-2/llvm.src/openmp/tools/archer/tests/races/parallel-simple.c
# .---command stderr------------
# | /home/botworker/builds/openmp-offload-amdgpu-runtime-2/llvm.src/openmp/tools/archer/tests/races/parallel-simple.c:36:11: error: CHECK: expected string not found in input
# | // CHECK: ThreadSanitizer: reported {{[1-7]}} warnings
# |           ^
# | <stdin>:23:5: note: scanning from here
# | DONE
# |     ^
# | <stdin>:24:1: note: possible intended match here
# | ThreadSanitizer: thread T4 finished with ignores enabled, created at:
# | ^
# | 
# | Input file: <stdin>
# | Check file: /home/botworker/builds/openmp-offload-amdgpu-runtime-2/llvm.src/openmp/tools/archer/tests/races/parallel-simple.c
# | 
Step 8 (run check-openmp) failure: run check-openmp (failure)
...
PASS: libomp :: tasking/nested_parallel_tasking.c (252 of 481)
PASS: libomp :: ompt/worksharing/for/guided_split.c (253 of 481)
PASS: libomp :: tasking/omp_task_priority.c (254 of 481)
PASS: libomp :: ompt/tasks/taskloop.c (255 of 481)
PASS: libomp :: tasking/omp_task_red_taskloop.c (256 of 481)
PASS: libomp :: tasking/omp_taskloop_taskwait.c (257 of 481)
PASS: libomp :: tasking/nested_task_creation.c (258 of 481)
PASS: libomp :: ompt/loadtool/tool_not_available.c (259 of 481)
PASS: libomp :: tasking/omp_task_priority2.c (260 of 481)
PASS: libomp :: tasking/omp_task_firstprivate.c (261 of 481)
FAIL: libarcher :: races/parallel-simple.c (262 of 481)
******************** TEST 'libarcher :: races/parallel-simple.c' FAILED ********************
Exit Code: 1

Command Output (stdout):
--
# RUN: at line 13
/home/botworker/builds/openmp-offload-amdgpu-runtime-2/build/llvm.build/./bin/clang -fopenmp  -gdwarf-4 -O1 -fsanitize=thread  -I /home/botworker/builds/openmp-offload-amdgpu-runtime-2/llvm.src/openmp/tools/archer/tests -I /home/botworker/builds/openmp-offload-amdgpu-runtime-2/build/llvm.build/runtimes/runtimes-bins/openmp/runtime/src -L /home/botworker/builds/openmp-offload-amdgpu-runtime-2/build/llvm.build/runtimes/runtimes-bins/openmp/runtime/src -Wl,-rpath,/home/botworker/builds/openmp-offload-amdgpu-runtime-2/build/llvm.build/runtimes/runtimes-bins/openmp/runtime/src   /home/botworker/builds/openmp-offload-amdgpu-runtime-2/llvm.src/openmp/tools/archer/tests/races/parallel-simple.c -o /home/botworker/builds/openmp-offload-amdgpu-runtime-2/build/llvm.build/runtimes/runtimes-bins/openmp/tools/archer/tests/races/Output/parallel-simple.c.tmp -latomic && env TSAN_OPTIONS='ignore_noninstrumented_modules=0:ignore_noninstrumented_modules=1' /home/botworker/builds/openmp-offload-amdgpu-runtime-2/llvm.src/openmp/tools/archer/tests/deflake.bash /home/botworker/builds/openmp-offload-amdgpu-runtime-2/build/llvm.build/runtimes/runtimes-bins/openmp/tools/archer/tests/races/Output/parallel-simple.c.tmp 2>&1 | tee /home/botworker/builds/openmp-offload-amdgpu-runtime-2/build/llvm.build/runtimes/runtimes-bins/openmp/tools/archer/tests/races/Output/parallel-simple.c.tmp.log | /home/botworker/builds/openmp-offload-amdgpu-runtime-2/build/llvm.build/./bin/FileCheck /home/botworker/builds/openmp-offload-amdgpu-runtime-2/llvm.src/openmp/tools/archer/tests/races/parallel-simple.c
# executed command: /home/botworker/builds/openmp-offload-amdgpu-runtime-2/build/llvm.build/./bin/clang -fopenmp -gdwarf-4 -O1 -fsanitize=thread -I /home/botworker/builds/openmp-offload-amdgpu-runtime-2/llvm.src/openmp/tools/archer/tests -I /home/botworker/builds/openmp-offload-amdgpu-runtime-2/build/llvm.build/runtimes/runtimes-bins/openmp/runtime/src -L /home/botworker/builds/openmp-offload-amdgpu-runtime-2/build/llvm.build/runtimes/runtimes-bins/openmp/runtime/src -Wl,-rpath,/home/botworker/builds/openmp-offload-amdgpu-runtime-2/build/llvm.build/runtimes/runtimes-bins/openmp/runtime/src /home/botworker/builds/openmp-offload-amdgpu-runtime-2/llvm.src/openmp/tools/archer/tests/races/parallel-simple.c -o /home/botworker/builds/openmp-offload-amdgpu-runtime-2/build/llvm.build/runtimes/runtimes-bins/openmp/tools/archer/tests/races/Output/parallel-simple.c.tmp -latomic
# note: command had no output on stdout or stderr
# executed command: env TSAN_OPTIONS=ignore_noninstrumented_modules=0:ignore_noninstrumented_modules=1 /home/botworker/builds/openmp-offload-amdgpu-runtime-2/llvm.src/openmp/tools/archer/tests/deflake.bash /home/botworker/builds/openmp-offload-amdgpu-runtime-2/build/llvm.build/runtimes/runtimes-bins/openmp/tools/archer/tests/races/Output/parallel-simple.c.tmp
# note: command had no output on stdout or stderr
# executed command: tee /home/botworker/builds/openmp-offload-amdgpu-runtime-2/build/llvm.build/runtimes/runtimes-bins/openmp/tools/archer/tests/races/Output/parallel-simple.c.tmp.log
# note: command had no output on stdout or stderr
# executed command: /home/botworker/builds/openmp-offload-amdgpu-runtime-2/build/llvm.build/./bin/FileCheck /home/botworker/builds/openmp-offload-amdgpu-runtime-2/llvm.src/openmp/tools/archer/tests/races/parallel-simple.c
# note: command had no output on stdout or stderr
# RUN: at line 14
/home/botworker/builds/openmp-offload-amdgpu-runtime-2/build/llvm.build/./bin/clang -fopenmp  -gdwarf-4 -O1 -fsanitize=thread  -I /home/botworker/builds/openmp-offload-amdgpu-runtime-2/llvm.src/openmp/tools/archer/tests -I /home/botworker/builds/openmp-offload-amdgpu-runtime-2/build/llvm.build/runtimes/runtimes-bins/openmp/runtime/src -L /home/botworker/builds/openmp-offload-amdgpu-runtime-2/build/llvm.build/runtimes/runtimes-bins/openmp/runtime/src -Wl,-rpath,/home/botworker/builds/openmp-offload-amdgpu-runtime-2/build/llvm.build/runtimes/runtimes-bins/openmp/runtime/src   /home/botworker/builds/openmp-offload-amdgpu-runtime-2/llvm.src/openmp/tools/archer/tests/races/parallel-simple.c -o /home/botworker/builds/openmp-offload-amdgpu-runtime-2/build/llvm.build/runtimes/runtimes-bins/openmp/tools/archer/tests/races/Output/parallel-simple.c.tmp -latomic && env ARCHER_OPTIONS="ignore_serial=1 report_data_leak=1" env TSAN_OPTIONS='ignore_noninstrumented_modules=0:ignore_noninstrumented_modules=1' /home/botworker/builds/openmp-offload-amdgpu-runtime-2/llvm.src/openmp/tools/archer/tests/deflake.bash /home/botworker/builds/openmp-offload-amdgpu-runtime-2/build/llvm.build/runtimes/runtimes-bins/openmp/tools/archer/tests/races/Output/parallel-simple.c.tmp 2>&1 | tee /home/botworker/builds/openmp-offload-amdgpu-runtime-2/build/llvm.build/runtimes/runtimes-bins/openmp/tools/archer/tests/races/Output/parallel-simple.c.tmp.log | /home/botworker/builds/openmp-offload-amdgpu-runtime-2/build/llvm.build/./bin/FileCheck /home/botworker/builds/openmp-offload-amdgpu-runtime-2/llvm.src/openmp/tools/archer/tests/races/parallel-simple.c
# executed command: /home/botworker/builds/openmp-offload-amdgpu-runtime-2/build/llvm.build/./bin/clang -fopenmp -gdwarf-4 -O1 -fsanitize=thread -I /home/botworker/builds/openmp-offload-amdgpu-runtime-2/llvm.src/openmp/tools/archer/tests -I /home/botworker/builds/openmp-offload-amdgpu-runtime-2/build/llvm.build/runtimes/runtimes-bins/openmp/runtime/src -L /home/botworker/builds/openmp-offload-amdgpu-runtime-2/build/llvm.build/runtimes/runtimes-bins/openmp/runtime/src -Wl,-rpath,/home/botworker/builds/openmp-offload-amdgpu-runtime-2/build/llvm.build/runtimes/runtimes-bins/openmp/runtime/src /home/botworker/builds/openmp-offload-amdgpu-runtime-2/llvm.src/openmp/tools/archer/tests/races/parallel-simple.c -o /home/botworker/builds/openmp-offload-amdgpu-runtime-2/build/llvm.build/runtimes/runtimes-bins/openmp/tools/archer/tests/races/Output/parallel-simple.c.tmp -latomic
# note: command had no output on stdout or stderr
# executed command: env 'ARCHER_OPTIONS=ignore_serial=1 report_data_leak=1' env TSAN_OPTIONS=ignore_noninstrumented_modules=0:ignore_noninstrumented_modules=1 /home/botworker/builds/openmp-offload-amdgpu-runtime-2/llvm.src/openmp/tools/archer/tests/deflake.bash /home/botworker/builds/openmp-offload-amdgpu-runtime-2/build/llvm.build/runtimes/runtimes-bins/openmp/tools/archer/tests/races/Output/parallel-simple.c.tmp
# note: command had no output on stdout or stderr
# executed command: tee /home/botworker/builds/openmp-offload-amdgpu-runtime-2/build/llvm.build/runtimes/runtimes-bins/openmp/tools/archer/tests/races/Output/parallel-simple.c.tmp.log
# note: command had no output on stdout or stderr
# executed command: /home/botworker/builds/openmp-offload-amdgpu-runtime-2/build/llvm.build/./bin/FileCheck /home/botworker/builds/openmp-offload-amdgpu-runtime-2/llvm.src/openmp/tools/archer/tests/races/parallel-simple.c
# .---command stderr------------
# | /home/botworker/builds/openmp-offload-amdgpu-runtime-2/llvm.src/openmp/tools/archer/tests/races/parallel-simple.c:36:11: error: CHECK: expected string not found in input
# | // CHECK: ThreadSanitizer: reported {{[1-7]}} warnings
# |           ^
# | <stdin>:23:5: note: scanning from here
# | DONE
# |     ^
# | <stdin>:24:1: note: possible intended match here
# | ThreadSanitizer: thread T4 finished with ignores enabled, created at:
# | ^
# | 
# | Input file: <stdin>
# | Check file: /home/botworker/builds/openmp-offload-amdgpu-runtime-2/llvm.src/openmp/tools/archer/tests/races/parallel-simple.c
# | 

```

</details>

https://github.com/llvm/llvm-project/pull/208908

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