Fix barrier

Author: michel2323

README.md

@@ -147,7 +147,7 @@ translator](https://github.com/KhronosGroup/SPIRV-LLVM-Translator):
 
 ```julia
 julia> function kernel()
-         barrier()
+         barrier(0)
          return
        end
 

src/mapreduce.jl

@@ -16,7 +16,7 @@
     # perform a reduction
     d = 1
     while d < items
-        barrier()
+        barrier(0)
         index = 2 * d * (item-1) + 1
         @inbounds if index <= items
             other_val = if index + d <= items

src/oneAPIKernels.jl

@@ -161,7 +161,7 @@ end
 ## Synchronization and Printing
 
 @device_override @inline function KA.__synchronize()
-    barrier()
+    barrier(0)
 end
 
 @device_override @inline function KA.__print(args...)

test/device/intrinsics.jl

@@ -226,7 +226,7 @@ end
 
         s[t] = d[t]
         s2[t] = 2*d[t]
-        barrier()
+        barrier(0)
         d[t] = s[tr]
 
         return
@@ -252,7 +252,7 @@ end
 
             s[t] = d[t]
             s2[t] = d[t]
-            barrier()
+            barrier(0)
             d[t] = s[tr]
 
             return

test/execution.jl

@@ -569,18 +569,18 @@ end
 
         r[tx] = r_[tx]
 
-        barrier()
+        barrier(0)
 
         for j=1:n
             if tx == 1
                 r[j] = r[j] / 2f0
             end
-            barrier()
+            barrier(0)
 
             if tx > j && tx <= 4
                 r[tx] = r[tx] - 2f0*r[j]
             end
-            barrier()
+            barrier(0)
         end
 
         if bx == 1