Merge upstream RDNA4 layouts and validate native Windows K integration

kernels/common/hip_device_minimal.h

@@ -5,12 +5,19 @@
 // needed. Definitions below mirror public HIP qualifiers and LLVM AMDGPU
 // work-item/grid builtins. The normal Linux HIP include path is untouched.
 #define __device__ __attribute__((device))
+#define __host__ __attribute__((host))
 #define __global__ __attribute__((global))
 #define __shared__ __attribute__((shared))
+#define __constant__ __attribute__((constant))
 #define __forceinline__ __attribute__((always_inline)) inline
 #define __launch_bounds__(n) __attribute__((amdgpu_flat_work_group_size(1, n)))
 
 struct d4r_device_dim3 { unsigned x, y, z; };
+// Public HIP vector storage ABI used by M's packed global/LDS accesses.
+struct alignas(8) uint2 { unsigned x, y; };
+struct alignas(16) uint4 { unsigned x, y, z, w; };
+static_assert(sizeof(uint2) == 8 && alignof(uint2) == 8, "HIP uint2 ABI");
+static_assert(sizeof(uint4) == 16 && alignof(uint4) == 16, "HIP uint4 ABI");
 __device__ __forceinline__ d4r_device_dim3 d4r_thread_idx() {
     return {__builtin_amdgcn_workitem_id_x(), __builtin_amdgcn_workitem_id_y(),
         __builtin_amdgcn_workitem_id_z()};