--- a/libclc/amdgcn/lib/mem_fence/fence.cl	Mon May 25 11:55:54 2020 +0900
+++ b/libclc/amdgcn/lib/mem_fence/fence.cl	Tue Jun 08 06:07:14 2021 +0900
@@ -17,24 +17,21 @@
 _CLC_DEF void __clc_amdgcn_s_waitcnt(unsigned)  __asm("llvm.amdgcn.s.waitcnt");
 #endif
 
-_CLC_DEF void mem_fence(cl_mem_fence_flags flags)
-{
-	if (flags & CLK_GLOBAL_MEM_FENCE) {
-		// scalar loads are counted with LGKM but we don't know whether
-		// the compiler turned any loads to scalar
-		__waitcnt(0);
-	} else if (flags & CLK_LOCAL_MEM_FENCE)
-		__waitcnt(0xff); // LGKM is [12:8]
+_CLC_DEF _CLC_OVERLOAD void mem_fence(cl_mem_fence_flags flags) {
+  if (flags & CLK_GLOBAL_MEM_FENCE) {
+    // scalar loads are counted with LGKM but we don't know whether
+    // the compiler turned any loads to scalar
+    __waitcnt(0);
+  } else if (flags & CLK_LOCAL_MEM_FENCE)
+    __waitcnt(0xff); // LGKM is [12:8]
 }
 #undef __waitcnt
 
 // We don't have separate mechanism for read and write fences
-_CLC_DEF void read_mem_fence(cl_mem_fence_flags flags)
-{
-	mem_fence(flags);
+_CLC_DEF _CLC_OVERLOAD void read_mem_fence(cl_mem_fence_flags flags) {
+  mem_fence(flags);
 }
 
-_CLC_DEF void write_mem_fence(cl_mem_fence_flags flags)
-{
-	mem_fence(flags);
+_CLC_DEF _CLC_OVERLOAD void write_mem_fence(cl_mem_fence_flags flags) {
+  mem_fence(flags);
 }