public void SrtReg685()
{
var m = new SsaProcedureBuilder(nameof(SrtReg685));
var i_1 = m.Reg32("i_1");
var i_2 = m.Reg32("i_2");
var i_3 = m.Reg32("i_3");
m.Assign(i_1, m.Int32(0));
m.Label("m1");
m.Phi(i_2, i_1, i_3);
m.SideEffect(m.Fn("foo", i_2));
m.SideEffect(m.Fn("foo", m.IAdd(i_2, 1)));
m.Assign(i_3, m.IAdd(i_2, 2));
m.BranchIf(m.Eq(i_3, 10), "m1");
m.Label("m2");
m.Return();
var dom = m.Procedure.CreateBlockDominatorGraph();
var lif = new LinearInductionVariableFinder(m.Procedure, m.Ssa.Identifiers, dom);
lif.Find();
Assert.AreEqual("(0 0x00000002 0x0000000C)", lif.InductionVariables[0].ToString());
var ctx = lif.Contexts[lif.InductionVariables[0]];
var str = new StrengthReduction(m.Ssa, lif.InductionVariables[0], ctx);
str.ClassifyUses();
Assert.AreEqual(2, str.IncrementedUses.Count);
str.ModifyUses();
}
public void Spbp_LinearProcedure()
{
var m = new SsaProcedureBuilder(nameof(Spbp_LinearProcedure));
var fp = m.Ssa.Identifiers.Add(m.Frame.FramePointer, null, null, false).Identifier;
Given_StackPointer(m);
var sp_1 = m.Reg("sp_1", m.Architecture.StackRegister);
var sp_2 = m.Reg("sp_2", m.Architecture.StackRegister);
var sp_3 = m.Reg("sp_3", m.Architecture.StackRegister);
m.AddDefToEntryBlock(fp);
m.Assign(sp_1, m.ISub(fp, m.Int32(4)));
// Indirect call = hell node
var ci = m.Call(m.Mem32(m.Word32(0x2)), 4,
new[] { sp_1 },
new[] { sp_2 });
m.Assign(sp_3, m.IAdd(sp_2, m.Int32(4)));
m.Return();
m.AddUseToExitBlock(sp_3);
RunTest(m.Ssa);
var sExp =
#region Expected
@"Spbp_LinearProcedure_entry:
def fp
l1:
sp_1 = fp - 4
call Mem4[0x00000002:word32] (retsize: 4;)
uses: sp:sp_1
sp_2 = fp - 4
sp_3 = fp
return
Spbp_LinearProcedure_exit:
use sp_3
";
#endregion
AssertStringsEqual(sExp, m.Ssa);
}
public void Spbp_TwoExits()
{
var m = new SsaProcedureBuilder(nameof(Spbp_TwoExits));
Given_FramePointer(m);
Given_StackPointer(m);
var sp_1 = m.Reg("sp_1", m.Architecture.StackRegister);
var sp_2 = m.Reg("sp_2", m.Architecture.StackRegister);
var sp_3 = m.Reg("sp_3", m.Architecture.StackRegister);
var sp_4 = m.Reg("sp_4", m.Architecture.StackRegister);
var sp_5 = m.Reg("sp_5", m.Architecture.StackRegister);
var sp_6 = m.Reg("sp_6", m.Architecture.StackRegister);
m.AddDefToEntryBlock(fp);
m.Assign(sp_1, m.ISub(fp, m.Int32(4)));
m.BranchIf(m.Eq0(m.Mem32(m.Word32(0x1))), "m_eq0");
m.Label("m_ne0");
// Indirect call = hell node
m.Call(m.Mem32(m.Word32(0x4)), 4,
new[] { sp_1 },
new[] { sp_2 });
m.Assign(sp_3, m.IAdd(sp_2, m.Int32(4)));
m.Return();
m.Label("m_eq0");
// Indirect call = hell node
m.Call(m.Mem32(m.Word32(0x8)), 4,
new[] { sp_1 },
new[] { sp_4 });
m.Assign(sp_5, m.IAdd(sp_4, m.Int32(4)));
m.Return();
m.AddPhiToExitBlock(sp_6, (sp_3, "m_ne0"), (sp_5, "m_eq0"));
m.AddUseToExitBlock(sp_6);
RunTest(m.Ssa);
var sExp =
#region Expected
@"Spbp_TwoExits_entry:
def fp
l1:
sp_1 = fp - 4
branch Mem7[0x00000001:word32] == 0x00000000 m_eq0
goto m_ne0
m_eq0:
call Mem9[0x00000008:word32] (retsize: 4;)
uses: sp:sp_1
sp_4 = fp - 4
sp_5 = fp
return
m_ne0:
call Mem8[0x00000004:word32] (retsize: 4;)
uses: sp:sp_1
sp_2 = fp - 4
sp_3 = fp
return
Spbp_TwoExits_exit:
sp_6 = PHI((sp_3, m_ne0), (sp_5, m_eq0))
use sp_6
";
#endregion
AssertStringsEqual(sExp, m.Ssa);
}