[llvm] [WebAssembly] Fold unsigned offset (PR #145829)

[via llvm-commits]

badumbatish wrote:

failing unrelated test in flang: 

```
2025-07-03T04:43:40.4429321Z FAIL: Flang :: Semantics/windows.f90 (3488 of 3566)
2025-07-03T04:43:40.4430217Z ******************** TEST 'Flang :: Semantics/windows.f90' FAILED ********************
2025-07-03T04:43:40.4430930Z Exit Code: 1
2025-07-03T04:43:40.4431147Z 
2025-07-03T04:43:40.4431330Z Command Output (stdout):
2025-07-03T04:43:40.4431769Z --
2025-07-03T04:43:40.4432093Z --- 
2025-07-03T04:43:40.4432439Z +++ 
2025-07-03T04:43:40.4432791Z @@ -0,0 +1,2 @@
2025-07-03T04:43:40.4433028Z 
2025-07-03T04:43:40.4433445Z expect at 6: User IDs do not exist on Windows. This function will always return 1
2025-07-03T04:43:40.4434404Z expect at 11: Group IDs do not exist on Windows. This function will always return 1
2025-07-03T04:43:40.4435041Z 
2025-07-03T04:43:40.4435176Z FAIL
2025-07-03T04:43:40.4435380Z 
2025-07-03T04:43:40.4435513Z --
2025-07-03T04:43:40.4435878Z Command Output (stderr):
2025-07-03T04:43:40.4436983Z --
2025-07-03T04:43:40.4437401Z RUN: at line 1 has no command after substitutions
2025-07-03T04:43:40.4440415Z "/usr/bin/python3" /home/gha/actions-runner/_work/llvm-project/llvm-project/flang/test/Semantics/test_errors.py /home/gha/actions-runner/_work/llvm-project/llvm-project/flang/test/Semantics/windows.f90 /home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/flang --target=aarch64-pc-windows-msvc -Werror # RUN: at line 2
2025-07-03T04:43:40.4444459Z + /usr/bin/python3 /home/gha/actions-runner/_work/llvm-project/llvm-project/flang/test/Semantics/test_errors.py /home/gha/actions-runner/_work/llvm-project/llvm-project/flang/test/Semantics/windows.f90 /home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/flang --target=aarch64-pc-windows-msvc -Werror
2025-07-03T04:43:40.4446518Z 
2025-07-03T04:43:40.4446644Z --
2025-07-03T04:43:40.4446827Z 
2025-07-03T04:43:40.4446948Z ********************
```

https://github.com/llvm/llvm-project/pull/145829