Don't use @index(Global)

Author: christiangnrd

examples/histogram.jl

@@ -14,10 +14,11 @@ end
 
 # This a 1D histogram kernel where the histogramming happens on shmem
 @kernel unsafe_indices=true function histogram_kernel!(histogram_output, input)
-    tid = @index(Global, Linear)
+    gid = @index(Group, Linear)
     lid = @index(Local, Linear)
 
     @uniform gs = prod(@groupsize())
+    tid = (gid - 1) * gs + lid
     @uniform N = length(histogram_output)
 
     shared_histogram = @localmem eltype(input) (gs)