Test appropriate backend in examples

Author: christiangnrd

examples/memcopy.jl

@@ -16,8 +16,8 @@ function mycopy!(A, B)
     return
 end
 
-A = KernelAbstractions.zeros(backend, Float64, 128, 128)
-B = KernelAbstractions.ones(backend, Float64, 128, 128)
+A = KernelAbstractions.zeros(backend, f_type, 128, 128)
+B = KernelAbstractions.ones(backend, f_type, 128, 128)
 mycopy!(A, B)
 KernelAbstractions.synchronize(backend)
 @test A == B

examples/memcopy_static.jl

@@ -16,8 +16,8 @@ function mycopy_static!(A, B)
     return
 end
 
-A = KernelAbstractions.zeros(backend, Float64, 128, 128)
-B = KernelAbstractions.ones(backend, Float64, 128, 128)
+A = KernelAbstractions.zeros(backend, f_type, 128, 128)
+B = KernelAbstractions.ones(backend, f_type, 128, 128)
 mycopy_static!(A, B)
 KernelAbstractions.synchronize(backend)
 @test A == B

examples/performant_matmul.jl

@@ -4,7 +4,7 @@ using Test
 using Random
 include(joinpath(dirname(pathof(KernelAbstractions)), "../examples/utils.jl")) # Load backend
 
-const TILE_DIM = 32
+const TILE_DIM = 16
 
 @kernel function coalesced_matmul_kernel!(
         output, @Const(input1), @Const(input2), N, R, M,

examples/utils.jl

@@ -1,4 +1,5 @@
 # EXCLUDE FROM TESTING
+if !(@isdefined backend)
 if Base.find_package("CUDA") !== nothing
     using CUDA
     using CUDA.CUDAKernels
@@ -7,3 +8,8 @@ if Base.find_package("CUDA") !== nothing
 else
     const backend = CPU()
 end
+end
+
+@show backend, backend_str
+
+const f_type = KernelAbstractions.supports_float64(backend) ? Float64 : Float32

test/examples.jl

@@ -9,7 +9,7 @@ function find_sources(path::String, sources = String[])
     return sources
 end
 
-function examples_testsuite(backend_str)
+function examples_testsuite(backend, backend_str)
     @testset "examples" begin
         examples_dir = joinpath(@__DIR__, "..", "examples")
         examples = find_sources(examples_dir)
@@ -21,6 +21,7 @@ function examples_testsuite(backend_str)
         @testset "$(basename(example))" for example in examples
             @eval module $(gensym())
             backend_str = $backend_str
+            const backend = ($backend)()
             include($example)
             end
             @test true

test/testsuite.jl

@@ -89,7 +89,7 @@ function testsuite(backend, backend_str, backend_mod, AT, DAT; skip_tests = Set{
     end
 
     @conditional_testset "Examples" skip_tests begin
-        examples_testsuite(backend_str)
+        examples_testsuite(backend, backend_str)
     end
 
     return