September 2025 ROCm/llvm-project monthly summary: Focused on delivering cross-execution-space consteval CUDA support. Implemented updates to SemaCUDA.cpp to treat consteval as __host__ __device__, enabling consteval function calls across host and device targets, and added a validation test consteval-func.cu. These changes reduce cross-space correctness gaps and improve CUDA interoperability within ROCm's LLVM integration. No major bugs fixed this month; the work centers on feature delivery and test coverage. Technologies demonstrated include C++, LLVM/Clang internals, CUDA, and cross-target semantics. Business impact: more portable and reliable host/device constexpr code paths, enabling smoother porting of CUDA-dependent templates and improved GPU compute reliability.