private void AssertSmallConst(string sExp, int shift, uint mult) { var m = new ProcedureBuilder(); var c = Constant.Int32((int)mult); var r1 = m.Reg32("r1", 1); var r2 = m.Reg32("r2", 2); var r2_r1 = m.Frame.EnsureSequence(r2.Storage, r1.Storage, PrimitiveType.Word64); var ass = m.Assign(r2_r1, m.SMul(r1, c)); m.Emit(new AliasAssignment(r2, m.Slice(PrimitiveType.Word32, r2_r1, 32))); if (shift != 0) m.Assign(r2, m.Sar(r2, shift)); var proc = m.Procedure; var ssa = new SsaTransform( null, proc, null, proc.CreateBlockDominatorGraph(), new HashSet<RegisterStorage>()).Transform(); var ctx = new SsaEvaluationContext(null, ssa.Identifiers); var rule = new ConstDivisionImplementedByMultiplication(ssa); ctx.Statement = proc.EntryBlock.Succ[0].Statements[0]; Assert.IsTrue(rule.Match(ass)); ass = rule.TransformInstruction(); Assert.AreEqual(sExp, ass.Src.ToString()); }