diff options
Diffstat (limited to 'Source/Core/OwickiGries.cs')
| -rw-r--r-- | Source/Core/OwickiGries.cs | 738 |
1 files changed, 0 insertions, 738 deletions
diff --git a/Source/Core/OwickiGries.cs b/Source/Core/OwickiGries.cs deleted file mode 100644 index 4f0c7a4b..00000000 --- a/Source/Core/OwickiGries.cs +++ /dev/null @@ -1,738 +0,0 @@ -using System;
-using System.Collections;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
-using Microsoft.Boogie;
-using System.Diagnostics;
-using System.Diagnostics.Contracts;
-
-namespace Microsoft.Boogie
-{
- public class OwickiGriesTransform
- {
- List<IdentifierExpr> globalMods;
- LinearTypeChecker linearTypeChecker;
- Dictionary<string, Procedure> asyncAndParallelCallDesugarings;
- List<Procedure> yieldCheckerProcs;
- List<Implementation> yieldCheckerImpls;
- Procedure yieldProc;
-
- public OwickiGriesTransform(LinearTypeChecker linearTypeChecker)
- {
- this.linearTypeChecker = linearTypeChecker;
- Program program = linearTypeChecker.program;
- globalMods = new List<IdentifierExpr>();
- foreach (Variable g in program.GlobalVariables())
- {
- globalMods.Add(new IdentifierExpr(Token.NoToken, g));
- }
- asyncAndParallelCallDesugarings = new Dictionary<string, Procedure>();
- yieldCheckerProcs = new List<Procedure>();
- yieldCheckerImpls = new List<Implementation>();
- yieldProc = null;
- }
-
- private void AddCallToYieldProc(List<Cmd> newCmds, Dictionary<Variable, Variable> ogOldGlobalMap, Dictionary<string, Variable> domainNameToLocalVar)
- {
- List<Expr> exprSeq = new List<Expr>();
- foreach (string domainName in linearTypeChecker.linearDomains.Keys)
- {
- exprSeq.Add(Expr.Ident(domainNameToLocalVar[domainName]));
- }
- foreach (IdentifierExpr ie in globalMods)
- {
- exprSeq.Add(Expr.Ident(ogOldGlobalMap[ie.Decl]));
- }
- if (yieldProc == null)
- {
- List<Variable> inputs = new List<Variable>();
- foreach (string domainName in linearTypeChecker.linearDomains.Keys)
- {
- var domain = linearTypeChecker.linearDomains[domainName];
- Formal f = new Formal(Token.NoToken, new TypedIdent(Token.NoToken, "linear_" + domainName + "_in", new MapType(Token.NoToken, new List<TypeVariable>(), new List<Type> { domain.elementType }, Type.Bool)), true);
- inputs.Add(f);
- }
- foreach (IdentifierExpr ie in globalMods)
- {
- Formal f = new Formal(Token.NoToken, new TypedIdent(Token.NoToken, string.Format("og_global_old_{0}", ie.Decl.Name), ie.Decl.TypedIdent.Type), true);
- inputs.Add(f);
- }
- yieldProc = new Procedure(Token.NoToken, "og_yield", new List<TypeVariable>(), inputs, new List<Variable>(), new List<Requires>(), new List<IdentifierExpr>(), new List<Ensures>());
- yieldProc.AddAttribute("inline", new LiteralExpr(Token.NoToken, Microsoft.Basetypes.BigNum.FromInt(1)));
- }
- CallCmd yieldCallCmd = new CallCmd(Token.NoToken, yieldProc.Name, exprSeq, new List<IdentifierExpr>());
- yieldCallCmd.Proc = yieldProc;
- newCmds.Add(yieldCallCmd);
- }
-
- private Dictionary<string, Expr> ComputeAvailableExprs(HashSet<Variable> availableLinearVars, Dictionary<string, Variable> domainNameToInputVar)
- {
- Dictionary<string, Expr> domainNameToExpr = new Dictionary<string, Expr>();
- foreach (var domainName in linearTypeChecker.linearDomains.Keys)
- {
- var expr = new IdentifierExpr(Token.NoToken, domainNameToInputVar[domainName]);
- expr.Resolve(new ResolutionContext(null));
- expr.Typecheck(new TypecheckingContext(null));
- domainNameToExpr[domainName] = expr;
- }
- foreach (Variable v in availableLinearVars)
- {
- var domainName = linearTypeChecker.FindDomainName(v);
- var domain = linearTypeChecker.linearDomains[domainName];
- IdentifierExpr ie = new IdentifierExpr(Token.NoToken, v);
- var expr = new NAryExpr(Token.NoToken, new FunctionCall(domain.mapOrBool), new List<Expr> { v.TypedIdent.Type is MapType ? ie : linearTypeChecker.Singleton(ie, domainName), domainNameToExpr[domainName] });
- expr.Resolve(new ResolutionContext(null));
- expr.Typecheck(new TypecheckingContext(null));
- domainNameToExpr[domainName] = expr;
- }
- return domainNameToExpr;
- }
-
- private void AddUpdatesToOldGlobalVars(List<Cmd> newCmds, Dictionary<Variable, Variable> ogOldGlobalMap, Dictionary<string, Variable> domainNameToLocalVar, Dictionary<string, Expr> domainNameToExpr)
- {
- List<AssignLhs> lhss = new List<AssignLhs>();
- List<Expr> rhss = new List<Expr>();
- foreach (var domainName in linearTypeChecker.linearDomains.Keys)
- {
- lhss.Add(new SimpleAssignLhs(Token.NoToken, new IdentifierExpr(Token.NoToken, domainNameToLocalVar[domainName])));
- rhss.Add(domainNameToExpr[domainName]);
- }
- foreach (Variable g in ogOldGlobalMap.Keys)
- {
- lhss.Add(new SimpleAssignLhs(Token.NoToken, Expr.Ident(ogOldGlobalMap[g])));
- rhss.Add(new IdentifierExpr(Token.NoToken, g));
- }
- if (lhss.Count > 0)
- {
- newCmds.Add(new AssignCmd(Token.NoToken, lhss, rhss));
- }
- }
-
- private void DesugarYield(YieldCmd yieldCmd, List<Cmd> cmds, List<Cmd> newCmds, Dictionary<Variable, Variable> ogOldGlobalMap, Dictionary<string, Variable> domainNameToInputVar, Dictionary<string, Variable> domainNameToLocalVar)
- {
- AddCallToYieldProc(newCmds, ogOldGlobalMap, domainNameToLocalVar);
-
- if (globalMods.Count > 0)
- {
- newCmds.Add(new HavocCmd(Token.NoToken, globalMods));
- }
- Dictionary<string, Expr> domainNameToExpr = ComputeAvailableExprs(linearTypeChecker.availableLinearVars[yieldCmd], domainNameToInputVar);
- AddUpdatesToOldGlobalVars(newCmds, ogOldGlobalMap, domainNameToLocalVar, domainNameToExpr);
-
- for (int j = 0; j < cmds.Count; j++)
- {
- PredicateCmd predCmd = (PredicateCmd)cmds[j];
- newCmds.Add(new AssumeCmd(Token.NoToken, predCmd.Expr));
- }
- }
-
- public Procedure DesugarParallelCallCmd(CallCmd callCmd, out List<Expr> ins, out List<IdentifierExpr> outs)
- {
- List<string> parallelCalleeNames = new List<string>();
- CallCmd iter = callCmd;
- ins = new List<Expr>();
- outs = new List<IdentifierExpr>();
- while (iter != null)
- {
- parallelCalleeNames.Add(iter.Proc.Name);
- ins.AddRange(iter.Ins);
- outs.AddRange(iter.Outs);
- iter = iter.InParallelWith;
- }
- parallelCalleeNames.Sort();
- string procName = "og";
- foreach (string calleeName in parallelCalleeNames)
- {
- procName = procName + "_" + calleeName;
- }
- if (asyncAndParallelCallDesugarings.ContainsKey(procName))
- return asyncAndParallelCallDesugarings[procName];
-
- List<Variable> inParams = new List<Variable>();
- List<Variable> outParams = new List<Variable>();
- List<Requires> requiresSeq = new List<Requires>();
- List<Ensures> ensuresSeq = new List<Ensures>();
- int count = 0;
- while (callCmd != null)
- {
- Dictionary<Variable, Expr> map = new Dictionary<Variable, Expr>();
- foreach (Variable x in callCmd.Proc.InParams)
- {
- Variable y = new Formal(Token.NoToken, new TypedIdent(Token.NoToken, "og_" + count + x.Name, x.TypedIdent.Type), true);
- inParams.Add(y);
- map[x] = new IdentifierExpr(Token.NoToken, y);
- }
- foreach (Variable x in callCmd.Proc.OutParams)
- {
- Variable y = new Formal(Token.NoToken, new TypedIdent(Token.NoToken, "og_" + count + x.Name, x.TypedIdent.Type), false);
- outParams.Add(y);
- map[x] = new IdentifierExpr(Token.NoToken, y);
- }
- Contract.Assume(callCmd.Proc.TypeParameters.Count == 0);
- Substitution subst = Substituter.SubstitutionFromHashtable(map);
- foreach (Requires req in callCmd.Proc.Requires)
- {
- requiresSeq.Add(new Requires(req.Free, Substituter.Apply(subst, req.Condition)));
- }
- foreach (Ensures ens in callCmd.Proc.Ensures)
- {
- ensuresSeq.Add(new Ensures(ens.Free, Substituter.Apply(subst, ens.Condition)));
- }
- count++;
- callCmd = callCmd.InParallelWith;
- }
-
- Procedure proc = new Procedure(Token.NoToken, procName, new List<TypeVariable>(), inParams, outParams, requiresSeq, new List<IdentifierExpr>(), ensuresSeq);
- proc.AddAttribute("yields");
- asyncAndParallelCallDesugarings[procName] = proc;
- return proc;
- }
-
- private void CreateYieldCheckerImpl(DeclWithFormals decl, List<List<Cmd>> yields, Dictionary<Variable, Expr> map)
- {
- if (yields.Count == 0) return;
-
- Program program = linearTypeChecker.program;
- List<Variable> locals = new List<Variable>();
- List<Variable> inputs = new List<Variable>();
- foreach (IdentifierExpr ie in map.Values)
- {
- locals.Add(ie.Decl);
- }
- for (int i = 0; i < decl.InParams.Count - linearTypeChecker.linearDomains.Count; i++)
- {
- Variable inParam = decl.InParams[i];
- Variable copy = new LocalVariable(Token.NoToken, new TypedIdent(Token.NoToken, inParam.Name, inParam.TypedIdent.Type));
- locals.Add(copy);
- map[decl.InParams[i]] = new IdentifierExpr(Token.NoToken, copy);
- }
- {
- int i = decl.InParams.Count - linearTypeChecker.linearDomains.Count;
- foreach (string domainName in linearTypeChecker.linearDomains.Keys)
- {
- Variable inParam = decl.InParams[i];
- Variable copy = new Formal(Token.NoToken, new TypedIdent(Token.NoToken, inParam.Name, inParam.TypedIdent.Type), true);
- inputs.Add(copy);
- map[decl.InParams[i]] = new IdentifierExpr(Token.NoToken, copy);
- i++;
- }
- }
- for (int i = 0; i < decl.OutParams.Count; i++)
- {
- Variable outParam = decl.OutParams[i];
- var copy = new LocalVariable(Token.NoToken, new TypedIdent(Token.NoToken, outParam.Name, outParam.TypedIdent.Type));
- locals.Add(copy);
- map[decl.OutParams[i]] = new IdentifierExpr(Token.NoToken, copy);
- }
- Dictionary<Variable, Expr> ogOldLocalMap = new Dictionary<Variable, Expr>();
- Dictionary<Variable, Expr> assumeMap = new Dictionary<Variable, Expr>(map);
- foreach (IdentifierExpr ie in globalMods)
- {
- Variable g = ie.Decl;
- var copy = new LocalVariable(Token.NoToken, new TypedIdent(Token.NoToken, string.Format("og_local_old_{0}", g.Name), g.TypedIdent.Type));
- locals.Add(copy);
- ogOldLocalMap[g] = Expr.Ident(copy);
- Formal f = new Formal(Token.NoToken, new TypedIdent(Token.NoToken, string.Format("og_global_old_{0}", g.Name), g.TypedIdent.Type), true);
- inputs.Add(f);
- assumeMap[g] = Expr.Ident(f);
- }
-
- Substitution assumeSubst = Substituter.SubstitutionFromHashtable(assumeMap);
- Substitution oldSubst = Substituter.SubstitutionFromHashtable(ogOldLocalMap);
- Substitution subst = Substituter.SubstitutionFromHashtable(map);
- List<Block> yieldCheckerBlocks = new List<Block>();
- List<String> labels = new List<String>();
- List<Block> labelTargets = new List<Block>();
- Block yieldCheckerBlock = new Block(Token.NoToken, "exit", new List<Cmd>(), new ReturnCmd(Token.NoToken));
- labels.Add(yieldCheckerBlock.Label);
- labelTargets.Add(yieldCheckerBlock);
- yieldCheckerBlocks.Add(yieldCheckerBlock);
- int yieldCount = 0;
- foreach (List<Cmd> cs in yields)
- {
- var linearDomains = linearTypeChecker.linearDomains;
- List<Cmd> newCmds = new List<Cmd>();
- foreach (Cmd cmd in cs)
- {
- PredicateCmd predCmd = (PredicateCmd)cmd;
- newCmds.Add(new AssumeCmd(Token.NoToken, Substituter.ApplyReplacingOldExprs(assumeSubst, oldSubst, predCmd.Expr)));
- }
- foreach (Cmd cmd in cs)
- {
- PredicateCmd predCmd = (PredicateCmd)cmd;
- var newExpr = Substituter.ApplyReplacingOldExprs(subst, oldSubst, predCmd.Expr);
- if (predCmd is AssertCmd)
- newCmds.Add(new AssertCmd(predCmd.tok, newExpr, predCmd.Attributes));
- else
- newCmds.Add(new AssumeCmd(Token.NoToken, newExpr));
- }
- newCmds.Add(new AssumeCmd(Token.NoToken, Expr.False));
- yieldCheckerBlock = new Block(Token.NoToken, "L" + yieldCount++, newCmds, new ReturnCmd(Token.NoToken));
- labels.Add(yieldCheckerBlock.Label);
- labelTargets.Add(yieldCheckerBlock);
- yieldCheckerBlocks.Add(yieldCheckerBlock);
- }
- yieldCheckerBlocks.Insert(0, new Block(Token.NoToken, "enter", new List<Cmd>(), new GotoCmd(Token.NoToken, labels, labelTargets)));
-
- // Create the yield checker procedure
- var yieldCheckerName = string.Format("{0}_YieldChecker_{1}", decl is Procedure ? "Proc" : "Impl", decl.Name);
- var yieldCheckerProc = new Procedure(Token.NoToken, yieldCheckerName, decl.TypeParameters, inputs, new List<Variable>(), new List<Requires>(), new List<IdentifierExpr>(), new List<Ensures>());
- yieldCheckerProc.AddAttribute("inline", new LiteralExpr(Token.NoToken, Microsoft.Basetypes.BigNum.FromInt(1)));
- yieldCheckerProcs.Add(yieldCheckerProc);
-
- // Create the yield checker implementation
- var yieldCheckerImpl = new Implementation(Token.NoToken, yieldCheckerName, decl.TypeParameters, inputs, new List<Variable>(), locals, yieldCheckerBlocks);
- yieldCheckerImpl.Proc = yieldCheckerProc;
- yieldCheckerImpl.AddAttribute("inline", new LiteralExpr(Token.NoToken, Microsoft.Basetypes.BigNum.FromInt(1)));
- yieldCheckerImpls.Add(yieldCheckerImpl);
- }
-
- private bool IsYieldingHeader(GraphUtil.Graph<Block> graph, Block header)
- {
- foreach (Block backEdgeNode in graph.BackEdgeNodes(header))
- {
- foreach (Block x in graph.NaturalLoops(header, backEdgeNode))
- {
- foreach (Cmd cmd in x.Cmds)
- {
- if (cmd is YieldCmd)
- return true;
- CallCmd callCmd = cmd as CallCmd;
- if (callCmd == null) continue;
- if (callCmd.IsAsync || callCmd.InParallelWith != null || QKeyValue.FindBoolAttribute(callCmd.Proc.Attributes, "yields"))
- return true;
- }
- }
- }
- return false;
- }
-
- private void TransformImpl(Implementation impl)
- {
- if (!QKeyValue.FindBoolAttribute(impl.Proc.Attributes, "yields")) return;
-
- TransformProc(impl.Proc);
-
- // Find the yielding loop headers
- impl.PruneUnreachableBlocks();
- impl.ComputePredecessorsForBlocks();
- GraphUtil.Graph<Block> graph = Program.GraphFromImpl(impl);
- graph.ComputeLoops();
- if (!graph.Reducible)
- {
- throw new Exception("Irreducible flow graphs are unsupported.");
- }
- HashSet<Block> yieldingHeaders = new HashSet<Block>();
- IEnumerable<Block> sortedHeaders = graph.SortHeadersByDominance();
- foreach (Block header in sortedHeaders)
- {
- if (yieldingHeaders.Any(x => graph.DominatorMap.DominatedBy(x, header)))
- {
- yieldingHeaders.Add(header);
- }
- else if (IsYieldingHeader(graph, header))
- {
- yieldingHeaders.Add(header);
- }
- else
- {
- continue;
- }
- }
-
- Program program = linearTypeChecker.program;
- Dictionary<Variable, Expr> map = new Dictionary<Variable, Expr>();
- foreach (Variable local in impl.LocVars)
- {
- var copy = new LocalVariable(Token.NoToken, new TypedIdent(Token.NoToken, local.Name, local.TypedIdent.Type));
- map[local] = new IdentifierExpr(Token.NoToken, copy);
- }
- Dictionary<Variable, Variable> ogOldGlobalMap = new Dictionary<Variable, Variable>();
- foreach (IdentifierExpr ie in globalMods)
- {
- Variable g = ie.Decl;
- LocalVariable l = new LocalVariable(Token.NoToken, new TypedIdent(Token.NoToken, string.Format("og_global_old_{0}", g.Name), g.TypedIdent.Type));
- ogOldGlobalMap[g] = l;
- impl.LocVars.Add(l);
- }
- Dictionary<string, Variable> domainNameToInputVar = new Dictionary<string, Variable>();
- Dictionary<string, Variable> domainNameToLocalVar = new Dictionary<string, Variable>();
- {
- int i = impl.InParams.Count - linearTypeChecker.linearDomains.Count;
- foreach (string domainName in linearTypeChecker.linearDomains.Keys)
- {
- Variable inParam = impl.InParams[i];
- domainNameToInputVar[domainName] = inParam;
- Variable l = new LocalVariable(Token.NoToken, new TypedIdent(Token.NoToken, inParam.Name + "_local", inParam.TypedIdent.Type));
- domainNameToLocalVar[domainName] = l;
- impl.LocVars.Add(l);
- i++;
- }
- }
-
- // Collect the yield predicates and desugar yields
- List<List<Cmd>> yields = new List<List<Cmd>>();
- List<Cmd> cmds = new List<Cmd>();
- foreach (Block b in impl.Blocks)
- {
- YieldCmd yieldCmd = null;
- List<Cmd> newCmds = new List<Cmd>();
- for (int i = 0; i < b.Cmds.Count; i++)
- {
- Cmd cmd = b.Cmds[i];
- if (cmd is YieldCmd)
- {
- yieldCmd = (YieldCmd)cmd;
- continue;
- }
- if (yieldCmd != null)
- {
- PredicateCmd pcmd = cmd as PredicateCmd;
- if (pcmd == null)
- {
- DesugarYield(yieldCmd, cmds, newCmds, ogOldGlobalMap, domainNameToInputVar, domainNameToLocalVar);
- if (cmds.Count > 0)
- {
- yields.Add(cmds);
- cmds = new List<Cmd>();
- }
- yieldCmd = null;
- }
- else
- {
- cmds.Add(pcmd);
- }
- }
- CallCmd callCmd = cmd as CallCmd;
- if (callCmd != null)
- {
- if (callCmd.InParallelWith != null || callCmd.IsAsync ||
- QKeyValue.FindBoolAttribute(callCmd.Proc.Attributes, "yields"))
- {
- AddCallToYieldProc(newCmds, ogOldGlobalMap, domainNameToLocalVar);
- }
- if (callCmd.InParallelWith != null)
- {
- List<Expr> ins;
- List<IdentifierExpr> outs;
- Procedure dummyParallelCallDesugaring = DesugarParallelCallCmd(callCmd, out ins, out outs);
- CallCmd dummyCallCmd = new CallCmd(Token.NoToken, dummyParallelCallDesugaring.Name, ins, outs);
- dummyCallCmd.Proc = dummyParallelCallDesugaring;
- newCmds.Add(dummyCallCmd);
- }
- else if (callCmd.IsAsync)
- {
- if (!asyncAndParallelCallDesugarings.ContainsKey(callCmd.Proc.Name))
- {
- asyncAndParallelCallDesugarings[callCmd.Proc.Name] = new Procedure(Token.NoToken, string.Format("DummyAsyncTarget_{0}", callCmd.Proc.Name), callCmd.Proc.TypeParameters, callCmd.Proc.InParams, callCmd.Proc.OutParams, callCmd.Proc.Requires, new List<IdentifierExpr>(), new List<Ensures>());
- }
- var dummyAsyncTargetProc = asyncAndParallelCallDesugarings[callCmd.Proc.Name];
- CallCmd dummyCallCmd = new CallCmd(Token.NoToken, dummyAsyncTargetProc.Name, callCmd.Ins, callCmd.Outs);
- dummyCallCmd.Proc = dummyAsyncTargetProc;
- newCmds.Add(dummyCallCmd);
- }
- else
- {
- newCmds.Add(callCmd);
- }
- if (callCmd.InParallelWith != null || callCmd.IsAsync ||
- QKeyValue.FindBoolAttribute(callCmd.Proc.Attributes, "yields"))
- {
- HashSet<Variable> availableLinearVars = new HashSet<Variable>(linearTypeChecker.availableLinearVars[callCmd]);
- foreach (IdentifierExpr ie in callCmd.Outs)
- {
- if (linearTypeChecker.FindDomainName(ie.Decl) == null) continue;
- availableLinearVars.Add(ie.Decl);
- }
- Dictionary<string, Expr> domainNameToExpr = ComputeAvailableExprs(availableLinearVars, domainNameToInputVar);
- AddUpdatesToOldGlobalVars(newCmds, ogOldGlobalMap, domainNameToLocalVar, domainNameToExpr);
- }
- }
- else
- {
- newCmds.Add(cmd);
- }
- }
- if (yieldCmd != null)
- {
- DesugarYield(yieldCmd, cmds, newCmds, ogOldGlobalMap, domainNameToInputVar, domainNameToLocalVar);
- if (cmds.Count > 0)
- {
- yields.Add(cmds);
- cmds = new List<Cmd>();
- }
- }
- if (b.TransferCmd is ReturnCmd && QKeyValue.FindBoolAttribute(impl.Proc.Attributes, "yields"))
- {
- AddCallToYieldProc(newCmds, ogOldGlobalMap, domainNameToLocalVar);
- }
- b.Cmds = newCmds;
- }
-
- foreach (Block header in yieldingHeaders)
- {
- Dictionary<string, Expr> domainNameToExpr = ComputeAvailableExprs(linearTypeChecker.availableLinearVars[header], domainNameToInputVar);
- foreach (Block pred in header.Predecessors)
- {
- AddCallToYieldProc(pred.Cmds, ogOldGlobalMap, domainNameToLocalVar);
- AddUpdatesToOldGlobalVars(pred.Cmds, ogOldGlobalMap, domainNameToLocalVar, domainNameToExpr);
- }
- List<Cmd> newCmds = new List<Cmd>();
- foreach (string domainName in linearTypeChecker.linearDomains.Keys)
- {
- newCmds.Add(new AssumeCmd(Token.NoToken, Expr.Binary(BinaryOperator.Opcode.Eq, Expr.Ident(domainNameToLocalVar[domainName]), domainNameToExpr[domainName])));
- }
- foreach (Variable v in ogOldGlobalMap.Keys)
- {
- newCmds.Add(new AssumeCmd(Token.NoToken, Expr.Binary(BinaryOperator.Opcode.Eq, new IdentifierExpr(Token.NoToken, v), Expr.Ident(ogOldGlobalMap[v]))));
- }
- newCmds.AddRange(header.Cmds);
- header.Cmds = newCmds;
- }
-
- {
- // Add initial block
- List<AssignLhs> lhss = new List<AssignLhs>();
- List<Expr> rhss = new List<Expr>();
- Dictionary<string, Expr> domainNameToExpr = new Dictionary<string, Expr>();
- foreach (var domainName in linearTypeChecker.linearDomains.Keys)
- {
- domainNameToExpr[domainName] = new IdentifierExpr(Token.NoToken, domainNameToInputVar[domainName]);
- }
- for (int i = 0; i < impl.InParams.Count - linearTypeChecker.linearDomains.Count; i++)
- {
- Variable v = impl.InParams[i];
- var domainName = linearTypeChecker.FindDomainName(v);
- if (domainName == null) continue;
- var domain = linearTypeChecker.linearDomains[domainName];
- IdentifierExpr ie = new IdentifierExpr(Token.NoToken, v);
- domainNameToExpr[domainName] = new NAryExpr(Token.NoToken, new FunctionCall(domain.mapOrBool), new List<Expr> { v.TypedIdent.Type is MapType ? ie : linearTypeChecker.Singleton(ie, domainName), domainNameToExpr[domainName] });
- }
- foreach (string domainName in linearTypeChecker.linearDomains.Keys)
- {
- lhss.Add(new SimpleAssignLhs(Token.NoToken, new IdentifierExpr(Token.NoToken, domainNameToLocalVar[domainName])));
- rhss.Add(domainNameToExpr[domainName]);
- }
- foreach (Variable g in ogOldGlobalMap.Keys)
- {
- lhss.Add(new SimpleAssignLhs(Token.NoToken, Expr.Ident(ogOldGlobalMap[g])));
- rhss.Add(Expr.Ident(g));
- }
- if (lhss.Count > 0)
- {
- Block initBlock = new Block(Token.NoToken, "og_init", new List<Cmd> { new AssignCmd(Token.NoToken, lhss, rhss) }, new GotoCmd(Token.NoToken, new List<String> { impl.Blocks[0].Label }, new List<Block> { impl.Blocks[0] }));
- impl.Blocks.Insert(0, initBlock);
- }
- }
-
- CreateYieldCheckerImpl(impl, yields, map);
- }
-
- public void TransformProc(Procedure proc)
- {
- if (!QKeyValue.FindBoolAttribute(proc.Attributes, "stable")) return;
-
- Program program = linearTypeChecker.program;
- Dictionary<string, Variable> domainNameToInputVar = new Dictionary<string, Variable>();
- {
- int i = proc.InParams.Count - linearTypeChecker.linearDomains.Count;
- foreach (string domainName in linearTypeChecker.linearDomains.Keys)
- {
- Variable inParam = proc.InParams[i];
- domainNameToInputVar[domainName] = inParam;
- i++;
- }
- }
-
- // Collect the yield predicates and desugar yields
- List<List<Cmd>> yields = new List<List<Cmd>>();
- List<Cmd> cmds = new List<Cmd>();
- if (proc.Requires.Count > 0)
- {
- Dictionary<string, HashSet<Variable>> domainNameToScope = new Dictionary<string, HashSet<Variable>>();
- foreach (var domainName in linearTypeChecker.linearDomains.Keys)
- {
- domainNameToScope[domainName] = new HashSet<Variable>();
- domainNameToScope[domainName].Add(domainNameToInputVar[domainName]);
- }
- foreach (Variable v in program.GlobalVariables())
- {
- var domainName = linearTypeChecker.FindDomainName(v);
- if (domainName == null) continue;
- domainNameToScope[domainName].Add(v);
- }
- for (int i = 0; i < proc.InParams.Count - linearTypeChecker.linearDomains.Count; i++)
- {
- Variable v = proc.InParams[i];
- var domainName = linearTypeChecker.FindDomainName(v);
- if (domainName == null) continue;
- domainNameToScope[domainName].Add(v);
- }
- foreach (string domainName in linearTypeChecker.linearDomains.Keys)
- {
- cmds.Add(new AssumeCmd(Token.NoToken, linearTypeChecker.DisjointnessExpr(domainName, domainNameToScope[domainName])));
- }
- foreach (Requires r in proc.Requires)
- {
- if (r.Free)
- {
- cmds.Add(new AssumeCmd(r.tok, r.Condition));
- }
- else
- {
- cmds.Add(new AssertCmd(r.tok, r.Condition, r.Attributes));
- }
- }
- yields.Add(cmds);
- cmds = new List<Cmd>();
- }
- if (proc.Ensures.Count > 0)
- {
- Dictionary<string, HashSet<Variable>> domainNameToScope = new Dictionary<string, HashSet<Variable>>();
- foreach (var domainName in linearTypeChecker.linearDomains.Keys)
- {
- domainNameToScope[domainName] = new HashSet<Variable>();
- domainNameToScope[domainName].Add(domainNameToInputVar[domainName]);
- }
- foreach (Variable v in program.GlobalVariables())
- {
- var domainName = linearTypeChecker.FindDomainName(v);
- if (domainName == null) continue;
- domainNameToScope[domainName].Add(v);
- }
- for (int i = 0; i < proc.OutParams.Count; i++)
- {
- Variable v = proc.OutParams[i];
- var domainName = linearTypeChecker.FindDomainName(v);
- if (domainName == null) continue;
- domainNameToScope[domainName].Add(v);
- }
- foreach (string domainName in linearTypeChecker.linearDomains.Keys)
- {
- cmds.Add(new AssumeCmd(Token.NoToken, linearTypeChecker.DisjointnessExpr(domainName, domainNameToScope[domainName])));
- }
- foreach (Ensures e in proc.Ensures)
- {
- if (e.Free)
- {
- cmds.Add(new AssumeCmd(e.tok, e.Condition));
- }
- else
- {
- cmds.Add(new AssertCmd(e.tok, e.Condition, e.Attributes));
- }
- }
- yields.Add(cmds);
- cmds = new List<Cmd>();
- }
- CreateYieldCheckerImpl(proc, yields, new Dictionary<Variable, Expr>());
- }
-
- private void AddYieldProcAndImpl()
- {
- if (yieldProc == null) return;
-
- Program program = linearTypeChecker.program;
- List<Variable> inputs = new List<Variable>();
- foreach (string domainName in linearTypeChecker.linearDomains.Keys)
- {
- var domain = linearTypeChecker.linearDomains[domainName];
- Formal f = new Formal(Token.NoToken, new TypedIdent(Token.NoToken, "linear_" + domainName + "_in", new MapType(Token.NoToken, new List<TypeVariable>(), new List<Type> { domain.elementType }, Type.Bool)), true);
- inputs.Add(f);
- }
- foreach (IdentifierExpr ie in globalMods)
- {
- Formal f = new Formal(Token.NoToken, new TypedIdent(Token.NoToken, string.Format("og_global_old_{0}", ie.Decl.Name), ie.Decl.TypedIdent.Type), true);
- inputs.Add(f);
- }
- List<Block> blocks = new List<Block>();
- TransferCmd transferCmd = new ReturnCmd(Token.NoToken);
- if (yieldCheckerProcs.Count > 0)
- {
- List<Block> blockTargets = new List<Block>();
- List<String> labelTargets = new List<String>();
- int labelCount = 0;
- foreach (Procedure proc in yieldCheckerProcs)
- {
- List<Expr> exprSeq = new List<Expr>();
- foreach (Variable v in inputs)
- {
- exprSeq.Add(new IdentifierExpr(Token.NoToken, v));
- }
- CallCmd callCmd = new CallCmd(Token.NoToken, proc.Name, exprSeq, new List<IdentifierExpr>());
- callCmd.Proc = proc;
- string label = string.Format("L_{0}", labelCount++);
- Block block = new Block(Token.NoToken, label, new List<Cmd> { callCmd }, new ReturnCmd(Token.NoToken));
- labelTargets.Add(label);
- blockTargets.Add(block);
- blocks.Add(block);
- }
- transferCmd = new GotoCmd(Token.NoToken, labelTargets, blockTargets);
- }
- blocks.Insert(0, new Block(Token.NoToken, "enter", new List<Cmd>(), transferCmd));
-
- var yieldImpl = new Implementation(Token.NoToken, yieldProc.Name, new List<TypeVariable>(), inputs, new List<Variable>(), new List<Variable>(), blocks);
- yieldImpl.Proc = yieldProc;
- yieldImpl.AddAttribute("inline", new LiteralExpr(Token.NoToken, Microsoft.Basetypes.BigNum.FromInt(1)));
- program.TopLevelDeclarations.Add(yieldProc);
- program.TopLevelDeclarations.Add(yieldImpl);
- }
-
- private QKeyValue RemoveYieldsAttribute(QKeyValue iter)
- {
- if (iter == null) return null;
- iter.Next = RemoveYieldsAttribute(iter.Next);
- return (QKeyValue.FindBoolAttribute(iter, "yields")) ? iter.Next : iter;
- }
-
- public void Transform()
- {
- MoverChecking.AddCheckers(linearTypeChecker);
-
- Program program = linearTypeChecker.program;
- foreach (var decl in program.TopLevelDeclarations)
- {
- Implementation impl = decl as Implementation;
- if (impl == null) continue;
- TransformImpl(impl);
- }
- foreach (Procedure proc in yieldCheckerProcs)
- {
- program.TopLevelDeclarations.Add(proc);
- }
- foreach (Implementation impl in yieldCheckerImpls)
- {
- program.TopLevelDeclarations.Add(impl);
- }
- foreach (Procedure proc in asyncAndParallelCallDesugarings.Values)
- {
- program.TopLevelDeclarations.Add(proc);
- }
- AddYieldProcAndImpl();
- foreach (var decl in program.TopLevelDeclarations)
- {
- Procedure proc = decl as Procedure;
- if (proc == null) continue;
- if (QKeyValue.FindBoolAttribute(proc.Attributes, "yields"))
- {
- HashSet<Variable> modifiedVars = new HashSet<Variable>();
- proc.Modifies.Iter(x => modifiedVars.Add(x.Decl));
- foreach (GlobalVariable g in program.GlobalVariables())
- {
- if (modifiedVars.Contains(g)) continue;
- proc.Modifies.Add(new IdentifierExpr(Token.NoToken, g));
- }
- proc.Attributes = RemoveYieldsAttribute(proc.Attributes);
- }
- }
- foreach (var decl in program.TopLevelDeclarations)
- {
- Implementation impl = decl as Implementation;
- if (impl == null) continue;
- impl.Attributes = RemoveYieldsAttribute(impl.Attributes);
- }
- }
- }
-}
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