Exemplo n.º 1
0
        public void Pdg_InfiniteLoop()
        {
            ProcedureBuilder m = new ProcedureBuilder();
            m.Label("Infinity");
            m.BranchIf(m.Eq(m.LoadW(m.Word16(0x1234)), 0), "hop");
            m.SideEffect(m.Fn("foo"));
            m.Label("hop");
            m.BranchIf(m.Eq(m.LoadW(m.Word16(0x5123)), 1), "Infinity");
            m.SideEffect(m.Fn("bar"));
            m.Jump("Infinity");
            m.Return();

            FindPostDominators(m);
            string sExp = 
                "hop (4): idom ProcedureBuilder_exit (6)" + nl +
                "Infinity (2): idom hop (4)" + nl +
                "l1 (3): idom hop (4)" + nl +
                "l2 (5): idom ProcedureBuilder_exit (6)" + nl +
                "ProcedureBuilder_entry (1): idom Infinity (2)" + nl +
                "ProcedureBuilder_exit (6): idom " + nl;
            Assert.AreEqual(sExp, sw.ToString());
        }
Exemplo n.º 2
0
        public void Pdg_LoopWithIfElse()
        {
            var m = new ProcedureBuilder();
            var c = m.Declare(PrimitiveType.Word32, "c");
            var f = m.Declare(PrimitiveType.Bool, "f");
            m.Label("loopHead");
            m.BranchIf(m.Eq(c, 0), "done");
            m.BranchIf(f, "then");
            m.Label("else");
            m.SideEffect(m.Fn("CallElse"));
            m.Jump("loopHead");
            m.Label("then");
            m.SideEffect(m.Fn("CallThen"));
            m.Jump("loopHead");
            m.Label("done");
            m.Return();

            FindPostDominators(m);

            string sExp =
                "done (6): idom ProcedureBuilder_exit (7)" + nl +
                "else (4): idom loopHead (2)" + nl +
                "l1 (3): idom loopHead (2)" + nl +
                "loopHead (2): idom done (6)" + nl +
                "ProcedureBuilder_entry (1): idom loopHead (2)" + nl +
                "ProcedureBuilder_exit (7): idom " + nl +
                "then (5): idom loopHead (2)" + nl;
            Assert.AreEqual(sExp, sw.ToString());
        }