示例#1
0
        /// <summary>
        /// Provide source CFG for passification phase
        /// </summary>
        public static void BeforePassification(Implementation impl)
        {
            if (CommandLineOptions.Clo.GenerateIsaProgNoProofs)
            {
                return;
            }

            var config = new CFGReprConfigBuilder().SetIsAcyclic(true).SetBlockCopy(true).SetDesugarCalls(true)
                         .Build();

            beforePassificationCfg = CFGReprTransformer.GetCfgRepresentation(
                impl,
                config,
                out beforePassiveOrigBlock,
                out var newVarsFromDesugaring
                );
            cfgToDagHintManager.AfterDagToOrig = beforePassiveOrigBlock;
            beforePassiveData        = MethodDataFromImpl(impl, boogieGlobalData, newVarsFromDesugaring);
            passificationHintManager = new PassificationHintManager(beforePassiveOrigBlock);
            initialVarMapping        = new Dictionary <Block, IDictionary <Variable, Expr> >();

            // compute mapping between copied blocks (before dag -> after dag)
            var origToAfterDag = beforePassiveOrigBlock.InverseDict();

            beforeDagAfterDagBlock = DictionaryComposition(beforeDagOrigBlock, origToAfterDag);
        }
示例#2
0
        /// <summary>
        /// Provide source CFG for CFG-to-DAG phase
        /// </summary>
        public static void BeforeCFGToDAG(Implementation impl)
        {
            var config = new CFGReprConfigBuilder().SetIsAcyclic(false).SetBlockCopy(true).SetDesugarCalls(true)
                         .Build();

            beforeDagCfg = CFGReprTransformer.GetCfgRepresentation(impl,
                                                                   config,
                                                                   out beforeDagOrigBlock,
                                                                   out var newVarsFromDesugaring);
            beforeDagData       = MethodDataFromImpl(impl, boogieGlobalData, newVarsFromDesugaring);
            uniqueExitBlockOrig = null;
        }
示例#3
0
        /// <summary>
        /// Provide target CFG for passification phase, construct global version map.
        /// </summary>
        /// <param name="impl">source CFG after passification phase</param>
        /// <exception cref="ProofGenUnexpectedStateException">thrown if global version map is incorrect
        ///  (should never happen). </exception>
        public static void AfterPassificationCheckGlobalMap(Implementation impl)
        {
            afterPassificationImpl = impl;

            if (CommandLineOptions.Clo.GenerateIsaProgNoProofs)
            {
                return;
            }

            finalProgData = MethodDataFromImpl(impl, boogieGlobalData);
            var config = new CFGReprConfigBuilder().SetIsAcyclic(true).SetBlockCopy(true).SetDesugarCalls(false)
                         .SetDeepCopyPredCmd(TypeCheckBeforeVcMaybeRewritesCmd).Build();

            afterPassificationCfg =
                CFGReprTransformer.GetCfgRepresentation(impl, config, out afterPassificationToOrigBlock, out _);

            var passiveBlocks = new List <Block>(afterPassificationCfg.GetBlocksBackwards());

            var origToAfterPassificationBlock = afterPassificationToOrigBlock.InverseDict();

            beforePassiveToAfterPassiveBlock =
                DictionaryComposition(beforePassiveOrigBlock, origToAfterPassificationBlock);

            var globalVersion = new GlobalVersion();

            passiveRelationGen = new PassiveRelationGen(
                beforePassificationCfg,
                passificationHintManager,
                initialVarMapping,
                beforePassiveOrigBlock,
                beforePassiveToAfterPassiveBlock,
                ProofGenLiveVarAnalysis.ComputeLiveVariables(beforePassificationCfg, beforePassiveData)
                );

            //all variables before passification are the initial versions and already constrained
            globalVersionMap = globalVersion.GlobalVersionMap(
                passiveRelationGen,
                beforePassiveData.AllVariables(),
                afterPassificationCfg.entry,
                passiveBlocks);

            //Console.WriteLine("Version map: " + string.Join(Environment.NewLine, globalVersionMap));

            var versionMapCorrect =
                GlobalVersionChecker.CheckVersionMap(globalVersionMap, passiveRelationGen, beforePassificationCfg,
                                                     beforePassiveToAfterPassiveBlock);

            if (!versionMapCorrect)
            {
                throw new ProofGenUnexpectedStateException(typeof(ProofGenerationLayer), "Incorrect version map");
            }
        }
示例#4
0
        /// <summary>
        /// Provide target CFG after unreachable blocks are pruned (after passification).
        /// </summary>
        public static void AfterUnreachablePruning(Implementation impl)
        {
            if (CommandLineOptions.Clo.GenerateIsaProgNoProofs)
            {
                return;
            }

            var config = new CFGReprConfigBuilder().SetIsAcyclic(true).SetBlockCopy(true).SetDesugarCalls(false)
                         .SetDeepCopyPredCmd(TypeCheckBeforeVcMaybeRewritesCmd).Build();

            afterUnreachablePruningCfg =
                CFGReprTransformer.GetCfgRepresentation(impl, config, out var afterUnreachableToOrigBlock, out _);

            var origToAfterUnreachableBlock = afterUnreachableToOrigBlock.InverseDict();

            afterPassificationToAfterUnreachableBlock =
                DictionaryComposition(afterPassificationToOrigBlock, origToAfterUnreachableBlock);
        }