Graph/Update/dyn_cgf_accessor_spv.cpp and Graph/Explicit/regression_accessor_spv.cpp sporadic fail on Linux BMG

[sarnex]

Describe the bug

Graph/Update/dyn_cgf_accessor_spv.cpp is sporardically failing on Linux BMG.

It may be with the SPIR_V backend only (lit param --param spirv-backend=True but I'm disabling it in general to be safe.

 FAIL: SYCL :: Graph/Update/dyn_cgf_accessor_spv.cpp (653 of 2447)
  ******************** TEST 'SYCL :: Graph/Update/dyn_cgf_accessor_spv.cpp' FAILED ********************
  Exit Code: -6
  
  Command Output (stdout):
  --
  # RUN: at line 2
  env ONEAPI_DEVICE_SELECTOR=level_zero:gpu  /__w/llvm/llvm/build-e2e/Graph/Update/Output/dyn_cgf_accessor_spv.cpp.tmp.out /__w/llvm/llvm/llvm/sycl/test-e2e/Graph/Update/../Inputs/Kernels/dyn_cgf_accessor.spv
  # executed command: env ONEAPI_DEVICE_SELECTOR=level_zero:gpu /__w/llvm/llvm/build-e2e/Graph/Update/Output/dyn_cgf_accessor_spv.cpp.tmp.out /__w/llvm/llvm/llvm/sycl/test-e2e/Graph/Update/../Inputs/Kernels/dyn_cgf_accessor.spv
  # .---command stdout------------
  # | Unexpected value at index 0 for HostDataA: 0 (got) vs 42 (expected)
  # `-----------------------------
  # .---command stderr------------
  # | dyn_cgf_accessor_spv.cpp.tmp.out: /__w/llvm/llvm/llvm/sycl/test-e2e/Graph/Update/dyn_cgf_accessor_spv.cpp:78: int main(int, char **): Assertion `check_value(i, PatternA, HostDataA[i], "HostDataA")' failed.
  # | Stack dump without symbol names (ensure you have llvm-symbolizer in your PATH or set the environment var `LLVM_SYMBOLIZER_PATH` to point to it):
  # | 0  libsycl.so.9                     0x00007e29a2546aa2
  # | 1  libsycl.so.9                     0x00007e29a2544012
  # | 2  libc.so.6                        0x00007e29a1ccc330
  # | 3  libc.so.6                        0x00007e29a1d25b2c pthread_kill + 284
  # | 4  libc.so.6                        0x00007e29a1ccc27e gsignal + 30
  # | 5  libc.so.6                        0x00007e29a1caf8ff abort + 223
  # | 6  libc.so.6                        0x00007e29a1caf81b
  # | 7  libc.so.6                        0x00007e29a1cc2517
  # | 8  dyn_cgf_accessor_spv.cpp.tmp.out 0x000000000040592d
  # | 9  libc.so.6                        0x00007e29a1cb11ca
  # | 10 libc.so.6                        0x00007e29a1cb128b __libc_start_main + 139
  # | 11 dyn_cgf_accessor_spv.cpp.tmp.out 0x00000000004047d5
  # `-----------------------------
  # error: command failed with exit status: -6
  
  --
  
  ********************

https://github.com/intel/llvm/actions/runs/24410226672/job/71306699799

To reproduce

No response

Environment

• OS: [e.g Windows/Linux]
• Target device and vendor: [e.g. Intel GPU]
• DPC++ version: [e.g. commit hash or output of clang++ --version]
• Dependencies version: [e.g. the output of sycl-ls --verbose]

Additional context

No response

[sarnex]

Same for Graph/Explicit/regression_accessor_spv.cpp

https://github.com/intel/llvm/actions/runs/24520513076/job/71678589012

 FAIL: SYCL :: Graph/Explicit/regression_accessor_spv.cpp (576 of 2469)
  ******************** TEST 'SYCL :: Graph/Explicit/regression_accessor_spv.cpp' FAILED ********************
  Exit Code: -6
  
  Command Output (stdout):
  --
  # RUN: at line 2
  env ONEAPI_DEVICE_SELECTOR=level_zero:gpu  /__w/llvm/llvm/build-e2e/Graph/Explicit/Output/regression_accessor_spv.cpp.tmp.out /__w/llvm/llvm/llvm/sycl/test-e2e/Graph/Explicit/../Inputs/Kernels/update_with_indices_accessor.spv
  # executed command: env ONEAPI_DEVICE_SELECTOR=level_zero:gpu /__w/llvm/llvm/build-e2e/Graph/Explicit/Output/regression_accessor_spv.cpp.tmp.out /__w/llvm/llvm/llvm/sycl/test-e2e/Graph/Explicit/../Inputs/Kernels/update_with_indices_accessor.spv
  # .---command stderr------------
  # | regression_accessor_spv.cpp.tmp.out: /__w/llvm/llvm/llvm/sycl/test-e2e/Graph/Explicit/regression_accessor_spv.cpp:55: int main(int, char **): Assertion `HostDataA[i] == i' failed.
  # | Stack dump without symbol names (ensure you have llvm-symbolizer in your PATH or set the environment var `LLVM_SYMBOLIZER_PATH` to point to it):
  # | 0  libsycl.so.9                        0x000073d858148292
  # | 1  libsycl.so.9                        0x000073d858145802
  # | 2  libc.so.6                           0x000073d8578cc330
  # | 3  libc.so.6                           0x000073d857925b2c pthread_kill + 284
  # | 4  libc.so.6                           0x000073d8578cc27e gsignal + 30
  # | 5  libc.so.6                           0x000073d8578af8ff abort + 223
  # | 6  libc.so.6                           0x000073d8578af81b
  # | 7  libc.so.6                           0x000073d8578c2517
  # | 8  regression_accessor_spv.cpp.tmp.out 0x000000000040533e
  # | 9  libc.so.6                           0x000073d8578b11ca
  # | 10 libc.so.6                           0x000073d8578b128b __libc_start_main + 139
  # | 11 regression_accessor_spv.cpp.tmp.out 0x0000000000404785
  # `-----------------------------
  # error: command failed with exit status: -6
  
  --