remocing heuristic

src/GPUArrays.jl

@@ -16,7 +16,6 @@ using Reexport
 @reexport using GPUArraysCore
 
 ## executed on-device
-include("device/execution.jl")
 include("device/abstractarray.jl")
 
 using KernelAbstractions

src/host/broadcast.jl

@@ -117,28 +117,14 @@ function Base.map!(f, dest::AnyGPUArray, xs::AbstractArray...)
     end
 
     # grid-stride kernel
-    @kernel function map_kernel(dest, bc, nelem, common_length)
-
-        j = 0
-        J = @index(Global, Linear)
-        for i in 1:nelem
-            j += 1
-            if j <= common_length
-
-                J_c = CartesianIndices(axes(bc))[(J-1)*nelem + j]
-                @inbounds dest[J_c] = bc[J_c]
-            end
-        end
+    @kernel function map_kernel(dest, bc)
+        j = @index(Global, Linear)
+        @inbounds dest[j] = bc[j]
     end
-    elements = common_length
-    elements_per_thread = typemax(Int)
+
     kernel = map_kernel(get_backend(dest))
-    heuristic = launch_heuristic(get_backend(dest), kernel, dest, bc, 1,
-                                 common_length; elements, elements_per_thread)
-    config = launch_configuration(get_backend(dest), heuristic;
-                                  elements, elements_per_thread)
-    kernel(dest, bc, config.elements_per_thread,
-           common_length; ndrange = config.threads)
+    config = KernelAbstractions.launch_config(kernel, common_length, nothing)
+    kernel(dest, bc; ndrange = config[1], workgroupsize = config[2])
 
     if eltype(dest) <: BrokenBroadcast
         throw(ArgumentError("Map operation resulting in $(eltype(eltype(dest))) is not GPU compatible"))