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StringValue hello = new StringValue("Hello world!\n");

IRBuilder ir = new IRBuilder("top");
GlobalVariable variable = ir.constant(null, hello, null, false, null);
FunctionType ft = new FunctionType(IntType.INT_32,
		IntType.INT_8.pointerTo());
GlobalVariable puts = ir.functionDecl("puts", ft);
ir.beginFunction("main", new FunctionType(VoidType.INSTANCE), null, null);
ir.call(puts, Collections.singletonList(variable), null);
ir.endFunction(null);

System.out.println(ir.build());