[libclc] libclc: Add uintptr_t overloads of atomic_fetch_add and sub (PR #185263)

[Wenju He via cfe-commits]

================
@@ -17,3 +17,37 @@
 
 #define __CLC_BODY <atomic_def.inc>
 #include <clc/math/gentype.inc>
+
+#if defined(__opencl_c_atomic_order_seq_cst) &&                                \
+    defined(__opencl_c_atomic_scope_device)
+
+_CLC_OVERLOAD _CLC_DEF uintptr_t
+atomic_fetch_add(volatile __local atomic_uintptr_t *p, ptrdiff_t v) {
+  return __opencl_atomic_fetch_add(p, v, memory_order_seq_cst,
+                                   memory_scope_device);
+}
+
+_CLC_OVERLOAD _CLC_DEF uintptr_t
+atomic_fetch_add(volatile __global atomic_uintptr_t *p, ptrdiff_t v) {
+  return __opencl_atomic_fetch_add(p, v, memory_order_seq_cst,
+                                   memory_scope_device);
+}
+
+_CLC_OVERLOAD _CLC_DEF uintptr_t
+atomic_fetch_add(volatile __private atomic_uintptr_t *p, ptrdiff_t v) {
----------------
wenju-he wrote:

there is no private address space atomic builtin in spec?

https://github.com/llvm/llvm-project/pull/185263