[clang] [llvm] [Clang][OpenMP] Support expression semantics in target update fields with non-contiguous array sections (PR #176708)

[LLVM Continuous Integration via cfe-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `intel-sycl-gpu` running on `intel-sycl-gpu-01` while building `clang,offload` at step 6 "test-build-unified-tree-check-all".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/225/builds/3367

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

```
Step 6 (test-build-unified-tree-check-all) failure: 1200 seconds without output running [b'ninja', b'check-all'], attempting to kill
******************** TEST 'libomptarget :: spirv64-intel :: offloading/strided_update_variable_stride_misc.c' FAILED ********************
Exit Code: 1

Command Output (stdout):
--
# RUN: at line 1
/home/test-user/llvm-buildbot-worker/intel-sycl-gpu/build/./bin/clang -fopenmp    -I /home/test-user/llvm-buildbot-worker/intel-sycl-gpu/llvm-project/offload/test -I /home/test-user/llvm-buildbot-worker/intel-sycl-gpu/build/runtimes/runtimes-bins/openmp/runtime/src -L /home/test-user/llvm-buildbot-worker/intel-sycl-gpu/build/runtimes/runtimes-bins/offload -L /home/test-user/llvm-buildbot-worker/intel-sycl-gpu/build/./lib -L /home/test-user/llvm-buildbot-worker/intel-sycl-gpu/build/./lib -L /home/test-user/llvm-buildbot-worker/intel-sycl-gpu/build/runtimes/runtimes-bins/openmp/runtime/src  -Wl,-rpath,/home/test-user/llvm-buildbot-worker/intel-sycl-gpu/build/runtimes/runtimes-bins/offload -Wl,-rpath,/home/test-user/llvm-buildbot-worker/intel-sycl-gpu/build/runtimes/runtimes-bins/openmp/runtime/src -Wl,-rpath,/home/test-user/llvm-buildbot-worker/intel-sycl-gpu/build/./lib -Wl,-rpath,/home/test-user/llvm-buildbot-worker/intel-sycl-gpu/build/./lib  -fopenmp-targets=spirv64-intel /home/test-user/llvm-buildbot-worker/intel-sycl-gpu/llvm-project/offload/test/offloading/strided_update_variable_stride_misc.c -o /home/test-user/llvm-buildbot-worker/intel-sycl-gpu/build/runtimes/runtimes-bins/offload/test/spirv64-intel/offloading/Output/strided_update_variable_stride_misc.c.tmp && /home/test-user/llvm-buildbot-worker/intel-sycl-gpu/build/runtimes/runtimes-bins/offload/test/spirv64-intel/offloading/Output/strided_update_variable_stride_misc.c.tmp | /home/test-user/llvm-buildbot-worker/intel-sycl-gpu/build/./bin/FileCheck /home/test-user/llvm-buildbot-worker/intel-sycl-gpu/llvm-project/offload/test/offloading/strided_update_variable_stride_misc.c
# executed command: /home/test-user/llvm-buildbot-worker/intel-sycl-gpu/build/./bin/clang -fopenmp -I /home/test-user/llvm-buildbot-worker/intel-sycl-gpu/llvm-project/offload/test -I /home/test-user/llvm-buildbot-worker/intel-sycl-gpu/build/runtimes/runtimes-bins/openmp/runtime/src -L /home/test-user/llvm-buildbot-worker/intel-sycl-gpu/build/runtimes/runtimes-bins/offload -L /home/test-user/llvm-buildbot-worker/intel-sycl-gpu/build/./lib -L /home/test-user/llvm-buildbot-worker/intel-sycl-gpu/build/./lib -L /home/test-user/llvm-buildbot-worker/intel-sycl-gpu/build/runtimes/runtimes-bins/openmp/runtime/src -Wl,-rpath,/home/test-user/llvm-buildbot-worker/intel-sycl-gpu/build/runtimes/runtimes-bins/offload -Wl,-rpath,/home/test-user/llvm-buildbot-worker/intel-sycl-gpu/build/runtimes/runtimes-bins/openmp/runtime/src -Wl,-rpath,/home/test-user/llvm-buildbot-worker/intel-sycl-gpu/build/./lib -Wl,-rpath,/home/test-user/llvm-buildbot-worker/intel-sycl-gpu/build/./lib -fopenmp-targets=spirv64-intel /home/test-user/llvm-buildbot-worker/intel-sycl-gpu/llvm-project/offload/test/offloading/strided_update_variable_stride_misc.c -o /home/test-user/llvm-buildbot-worker/intel-sycl-gpu/build/runtimes/runtimes-bins/offload/test/spirv64-intel/offloading/Output/strided_update_variable_stride_misc.c.tmp
# executed command: /home/test-user/llvm-buildbot-worker/intel-sycl-gpu/build/runtimes/runtimes-bins/offload/test/spirv64-intel/offloading/Output/strided_update_variable_stride_misc.c.tmp
# executed command: /home/test-user/llvm-buildbot-worker/intel-sycl-gpu/build/./bin/FileCheck /home/test-user/llvm-buildbot-worker/intel-sycl-gpu/llvm-project/offload/test/offloading/strided_update_variable_stride_misc.c
# .---command stderr------------
# | /home/test-user/llvm-buildbot-worker/intel-sycl-gpu/llvm-project/offload/test/offloading/strided_update_variable_stride_misc.c:84:16: error: CHECK-NEXT: expected string not found in input
# | // CHECK-NEXT: 10.000000
# |                ^
# | <stdin>:18:9: note: scanning from here
# | 4.000000
# |         ^
# | <stdin>:19:1: note: possible intended match here
# | 5.000000
# | ^
# | 
# | Input file: <stdin>
# | Check file: /home/test-user/llvm-buildbot-worker/intel-sycl-gpu/llvm-project/offload/test/offloading/strided_update_variable_stride_misc.c
# | 
# | -dump-input=help explains the following input dump.
# | 
# | Input was:
# | <<<<<<
# |            .
# |            .
# |            .
# |           13: Test 2: Variable stride = 5 
# |           14: 0.000000 
# |           15: 1.000000 
# |           16: 2.000000 
# |           17: 3.000000 
# |           18: 4.000000 
# | next:84'0             X error: no match found
# |           19: 5.000000 
# | next:84'0     ~~~~~~~~~
# | next:84'1     ?         possible intended match
# |           20: 6.000000 
# | next:84'0     ~~~~~~~~~
# |           21: 7.000000 
# | next:84'0     ~~~~~~~~~
# |           22: 8.000000 
# | next:84'0     ~~~~~~~~~
# |           23: 9.000000 
# | next:84'0     ~~~~~~~~~
# | >>>>>>
...

```

</details>

https://github.com/llvm/llvm-project/pull/176708