Actually test values as part of examples.

Author: maleadt

examples/sum.jl

@@ -1,5 +1,7 @@
 # https://pauladamsmith.com/blog/2015/01/how-to-get-started-with-llvm-c-api.html
 
+using Test
+
 using LLVM
 
 if length(ARGS) == 2
@@ -35,7 +37,7 @@ Interpreter(mod) do engine
             GenericValue(LLVM.Int32Type(), y)]
 
     res = LLVM.run(engine, sum, args)
-    println(convert(Int, res))
+    @test convert(Int, res) == x + y
 
     dispose.(args)
     dispose(res)

examples/sum_integrated.jl

@@ -1,5 +1,7 @@
 # same as `sum.jl`, but reusing the Julia compiler to compile and execute the IR
 
+using Test
+
 using LLVM
 using LLVM.Interop
 
@@ -25,6 +27,5 @@ end
 
 # make Julia compile and execute the function
 push!(function_attributes(sum), EnumAttribute("alwaysinline"))
-ptr = LLVM.ref(sum)
-call_sum(x, y) = Base.llvmcall(ptr, Int32, Tuple{Int32, Int32}, x, y)
-@show call_sum(x, y)
+@eval call_sum(x, y) = $(call_function(sum, Int32, Tuple{Int32, Int32}, :(x, y)))
+@test call_sum(x, y) == x + y