public void CoaAcrossComment()
{
var a = m.Reg32("a");
var b = m.Reg32("b");
m.Assign(a, m.Mem32(m.Word32(0x00123400)));
m.Comment("This is a comment");
m.Assign(b, m.Mem32(a));
RunCoalescer();
var sExp =
@"
// This is a comment
b = Mem3[Mem2[0x123400<32>:word32]:word32]
";
AssertProcedureCode(sExp);
}
public void VpEquality2()
{
// Makes sure that
// y = x - 2
// if (y == 0) ...
// doesn't get munged into
// y = x - 2
// if (x == 2)
var x = m.Reg32("x");
var y = m.Reg32("y");
var stmX = m.Assign(x, m.Mem32(Constant.Word32(0x1000300)));
var stmY = m.Assign(y, m.ISub(x, 2));
var stm = m.BranchIf(m.Eq(y, 0), "test");
Assert.AreEqual("x = Mem2[0x1000300<32>:word32]", stmX.ToString());
Assert.AreEqual("y = x - 2<32>", stmY.ToString());
Assert.AreEqual("branch y == 0<32> test", stm.ToString());
RunValuePropagator();
Assert.AreEqual("branch x == 2<32> test", stm.Instruction.ToString());
}
public void VpEquality2()
{
// Makes sure that
// y = x - 2
// if (y == 0) ...
// doesn't get munged into
// y = x - 2
// if (x == 2)
var x = m.Reg32("x");
var y = m.Reg32("y");
var stmX = m.Assign(x, m.Mem32(Constant.Word32(0x1000300)));
var stmY = m.Assign(y, m.ISub(x, 2));
var stm = m.BranchIf(m.Eq(y, 0), "test");
Assert.AreEqual("x = Mem2[0x01000300:word32]", stmX.ToString());
Assert.AreEqual("y = x - 0x00000002", stmY.ToString());
Assert.AreEqual("branch y == 0x00000000 test", stm.ToString());
var vp = new ValuePropagator(segmentMap, m.Ssa, listener);
vp.Transform(stm);
Assert.AreEqual("branch x == 0x00000002 test", stm.Instruction.ToString());
}
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 UfuserMipsLittleEndianUnalignedWordLoad()
{
var r4 = m.Reg32("r4");
var r8 = m.Reg32("r8");
__lwl(r8, m.Mem32(m.IAdd(r4, 0x2B)));
__lwr(r8, m.Mem32(m.IAdd(r4, 0x28)));
var ssa = RunTest(m);
var sExp =
#region Expected
@"r8:r8
def: def r8
uses: r8_3 = r8
r4:r4
def: def r4
uses: r8_5 = Mem3[r4 + 0x00000028:word32]
Mem2:Global memory
def: def Mem2
r8_3: orig: r8
def: r8_3 = r8
Mem3:Global memory
def: def Mem3
uses: r8_5 = Mem3[r4 + 0x00000028:word32]
r8_5: orig: r8
def: r8_5 = Mem3[r4 + 0x00000028:word32]
// SsaProcedureBuilder
// Return size: 0
void SsaProcedureBuilder()
SsaProcedureBuilder_entry:
def r8
def r4
def Mem2
def Mem3
// succ: l1
l1:
r8_5 = Mem3[r4 + 0x00000028:word32]
SsaProcedureBuilder_exit:
";
#endregion
AssertStringsEqual(sExp, ssa);
}
public void Spbp_SpaceOnStack()
{
var m = new SsaProcedureBuilder(nameof(Spbp_SpaceOnStack));
var fp = m.Ssa.Identifiers.Add(m.Frame.FramePointer, null, null, false).Identifier;
Given_StackPointer(m);
var sp_1 = m.Reg("sp_1", sp);
var sp_2 = m.Reg("sp_2", sp);
var sp_3 = m.Reg("sp_3", sp);
var sp_4 = m.Reg("sp_4", sp);
var sp_5 = m.Reg("sp_5", sp);
var sp_6 = m.Reg("sp_6", sp);
var sp_7 = m.Reg("sp_7", sp);
var sp_8 = m.Reg("sp_8", sp);
var a = m.Reg("a", new RegisterStorage("a", 1, 0, PrimitiveType.Word32));
var b = m.Reg("b", new RegisterStorage("b", 2, 0, PrimitiveType.Word32));
var a_1 = m.Reg("a_1", (RegisterStorage)a.Storage);
var b_1 = m.Reg("b_1", (RegisterStorage)b.Storage);
m.AddDefToEntryBlock(fp);
m.Assign(sp_2, m.ISub(fp, 4)); // space for a
m.MStore(sp_2, a);
m.Assign(sp_3, m.ISub(fp, 4)); // space for b
m.MStore(sp_3, b);
m.Assign(sp_4, m.ISub(fp, 40)); // 40 bytes of stack space
m.MStore(sp_4, m.Word32(0xDEADBABE));
m.Call(m.Mem32(m.Word32(0x00123400)), 4,
new[] { sp_4 },
new[] { sp_5 });
m.Assign(sp_6, m.IAdd(sp_5, 40));
m.Assign(b_1, m.Mem32(sp_6));
m.Assign(sp_7, m.IAdd(sp_6, 4));
m.Assign(a_1, m.Mem32(sp_7));
m.Assign(sp_8, m.IAdd(sp_7, 4));
m.Return();
m.AddUseToExitBlock(sp_8);
RunTest(m.Ssa);
var sExp =
#region Expected
@"Spbp_SpaceOnStack_entry:
def fp
l1:
sp_2 = fp - 0x00000004
Mem13[sp_2:word32] = a
sp_3 = fp - 0x00000004
Mem14[sp_3:word32] = b
sp_4 = fp - 0x00000028
Mem15[sp_4:word32] = 0xDEADBABE
call Mem16[0x00123400:word32] (retsize: 4;)
uses: sp:sp_4
sp_5 = fp - 48
sp_6 = fp - 8
b_1 = Mem17[sp_6:word32]
sp_7 = fp - 4
a_1 = Mem18[sp_7:word32]
sp_8 = fp
return
Spbp_SpaceOnStack_exit:
use sp_8
";
#endregion
this.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);
}