Merge pull request #263 from maleadt/tb/copy

Implement Base.copy for copying a module.

Author: maleadt

src/core/module.jl

@@ -24,7 +24,9 @@ end
 
 Module(name::String; ctx::Context) =
     Module(API.LLVMModuleCreateWithNameInContext(name, ctx))
+
 Module(mod::Module) = Module(API.LLVMCloneModule(mod))
+Base.copy(mod::Module) = Module(mod)
 
 dispose(mod::Module) = API.LLVMDisposeModule(mod)
 

test/core.jl

@@ -727,7 +727,7 @@ end
 
 Context() do ctx
 LLVM.Module("SomeModule"; ctx) do mod
-    clone = LLVM.Module(mod)
+    clone = copy(mod)
     @test mod != clone
     @test context(clone) == ctx
     dispose(clone)

test/execution.jl

@@ -137,7 +137,7 @@ Context() do ctx
     args = [GenericValue(LLVM.Int32Type(ctx), 1),
             GenericValue(LLVM.Int32Type(ctx), 2)]
 
-    let mod = LLVM.Module(mod)
+    let mod = copy(mod)
         fn = functions(mod)["SomeFunctionSum"]
         Interpreter(mod) do engine
             res = LLVM.run(engine, fn, args)