SWDEV-490198: _sync() will be enabled by default in 6.4

Change-Id: Id029424a9c0f6b144a7aa0e96fe8acc4a138ec51


[ROCm/clr commit: 556390f9c7]

projects/clr/CHANGELOG.md

@@ -28,6 +28,11 @@ Full documentation for HIP is available at [rocm.docs.amd.com](https://rocm.docs
 ### Resolved issues
 
 
+- The `_sync()` version of crosslane builtins such as `shfl_sync()`,
+  `__all_sync()` and `__any_sync()`, continue to be hidden behind the
+  preprocessor macro `HIP_ENABLE_WARP_SYNC_BUILTINS`, and will be enabled
+  unconditionally in the next ROCm release.
+
 ## HIP 6.2.41134 for ROCm 6.2.1
 
 ### Resolved issues

projects/clr/hipamd/include/hip/amd_detail/amd_warp_sync_functions.h

@@ -25,10 +25,8 @@ THE SOFTWARE.
 // Warp sync builtins (with explicit mask argument) introduced in ROCm 6.2 as a
 // preview to allow end-users to adapt to the new interface involving 64-bit
 // masks. These are disabled by default, and can be enabled by setting the macro
-// below. The builtins will be enabled unconditionally in ROCm 6.3.
-//
-// This arrangement also applies to the __activemask() builtin defined in
-// amd_warp_functions.h.
+// "HIP_ENABLE_WARP_SYNC_BUILTINS". This arrangement also applies to the
+// __activemask() builtin defined in amd_warp_functions.h.
 #ifdef HIP_ENABLE_WARP_SYNC_BUILTINS
 
 #if !defined(__HIPCC_RTC__)