bundles/org.simantics.scl.compiler/src/org/simantics/scl/compiler/elaboration/chr/CHRRuleset.java

   1 package org.simantics.scl.compiler.elaboration.chr;
   2
   3 import java.util.ArrayList;
   4
   5 import org.cojen.classfile.TypeDesc;
   6 import org.simantics.scl.compiler.compilation.CompilationContext;
   7 import org.simantics.scl.compiler.constants.BooleanConstant;
   8 import org.simantics.scl.compiler.constants.Constant;
   9 import org.simantics.scl.compiler.constants.IntegerConstant;
  10 import org.simantics.scl.compiler.constants.JavaConstructor;
  11 import org.simantics.scl.compiler.constants.JavaMethod;
  12 import org.simantics.scl.compiler.constants.NoRepConstant;
  13 import org.simantics.scl.compiler.constants.generic.CallJava;
  14 import org.simantics.scl.compiler.constants.generic.MethodRef.FieldRef;
  15 import org.simantics.scl.compiler.constants.generic.MethodRef.ObjectMethodRef;
  16 import org.simantics.scl.compiler.constants.generic.MethodRef.SetFieldRef;
  17 import org.simantics.scl.compiler.elaboration.chr.analysis.CHRConstraintGGInfo;
  18 import org.simantics.scl.compiler.elaboration.chr.analysis.UsageAnalysis;
  19 import org.simantics.scl.compiler.elaboration.chr.plan.CHRSearchPlan;
  20 import org.simantics.scl.compiler.elaboration.chr.plan.PlanRealizer;
  21 import org.simantics.scl.compiler.elaboration.chr.relations.CHRConstraint;
  22 import org.simantics.scl.compiler.elaboration.contexts.SimplificationContext;
  23 import org.simantics.scl.compiler.elaboration.contexts.TranslationContext;
  24 import org.simantics.scl.compiler.elaboration.contexts.TypingContext;
  25 import org.simantics.scl.compiler.elaboration.expressions.Variable;
  26 import org.simantics.scl.compiler.elaboration.expressions.block.IncludeStatement;
  27 import org.simantics.scl.compiler.environment.AmbiguousNameException;
  28 import org.simantics.scl.compiler.errors.Locations;
  29 import org.simantics.scl.compiler.internal.codegen.chr.CHRCodeGenerationConstants;
  30 import org.simantics.scl.compiler.internal.codegen.chr.CHRRuntimeRulesetCodeGenerator;
  31 import org.simantics.scl.compiler.internal.codegen.references.BoundVar;
  32 import org.simantics.scl.compiler.internal.codegen.references.IVal;
  33 import org.simantics.scl.compiler.internal.codegen.ssa.SSAFunction;
  34 import org.simantics.scl.compiler.internal.codegen.types.StandardTypeConstructor;
  35 import org.simantics.scl.compiler.internal.codegen.utils.Constants;
  36 import org.simantics.scl.compiler.internal.codegen.writer.CodeWriter;
  37 import org.simantics.scl.compiler.internal.parsing.Symbol;
  38 import org.simantics.scl.compiler.types.TCon;
  39 import org.simantics.scl.compiler.types.TVar;
  40 import org.simantics.scl.compiler.types.Type;
  41 import org.simantics.scl.compiler.types.Types;
  42
  43 import gnu.trove.map.hash.THashMap;
  44 import gnu.trove.map.hash.TObjectIntHashMap;
  45 import gnu.trove.set.hash.THashSet;
  46 import gnu.trove.set.hash.TIntHashSet;
  47
  48 public class CHRRuleset extends Symbol {
  49
  50     public static final String INIT_CONSTRAINT = "__INIT__";
  51
  52     public ArrayList<CHRConstraint> constraints = new ArrayList<CHRConstraint>();
  53     public ArrayList<CHRRule> rules = new ArrayList<CHRRule>();
  54     public ArrayList<IncludeStatement> includes = new ArrayList<IncludeStatement>();
  55     public THashMap<CHRConstraint, IncludeStatement> constraintSourceMap = new THashMap<CHRConstraint, IncludeStatement>();
  56     public THashMap<CHRConstraint, CHRConstraintGGInfo> activeConstraintGGInfo = new THashMap<CHRConstraint, CHRConstraintGGInfo>(); // contains also imported constraints
  57     public THashMap<IncludeStatement, ArrayList<CHRConstraint>> inverseActiveConstraintSourceMap = new THashMap<IncludeStatement, ArrayList<CHRConstraint>>();
  58
  59     public boolean extensible;
  60
  61     public CHRConstraint initConstraint;
  62     public int priorityCount;
  63
  64     public int initialPriorityNumber = 0;
  65
  66     public String runtimeRulesetClassName;
  67     public TCon runtimeRulesetType;
  68     public BoundVar runtimeRulesetVariable;
  69     public TypeDesc runtimeRulesetTypeDesc;
  70
  71     public static final Constant READ_CURRENT_ID = new CallJava(TVar.EMPTY_ARRAY, Types.PROC, Types.INTEGER, new Type[] {Types.CHRContext},
  72             null, new FieldRef(CHRCodeGenerationConstants.CHRContext_name, "currentId", CHRRuntimeRulesetCodeGenerator.FACT_ID_TYPE), null);
  73     public static final Constant WRITE_CURRENT_ID = new CallJava(TVar.EMPTY_ARRAY, Types.PROC, Types.UNIT, new Type[] {Types.CHRContext, Types.INTEGER},
  74             null, new SetFieldRef(CHRCodeGenerationConstants.CHRContext_name, "currentId", CHRRuntimeRulesetCodeGenerator.FACT_ID_TYPE), null);
  75     public static final Constant GENERATE_ID = new CallJava(TVar.EMPTY_ARRAY, Types.PROC, Types.INTEGER, new Type[] {Types.CHRContext},
  76             null, new ObjectMethodRef(false, CHRCodeGenerationConstants.CHRContext_name, "generateId", CHRRuntimeRulesetCodeGenerator.FACT_ID_TYPE, Constants.EMPTY_TYPEDESC_ARRAY), null);
  77
  78     // FIXME remove and change the parameter of Expression.toVal
  79     private CompilationContext cachedContext;
  80
  81     // For code generation
  82     public CHRRulesetObject rulesetObject;
  83     public SSAFunction initializer;
  84     public SSAFunction deinitializer;
  85
  86     public CHRRuleset() {
  87         initConstraint = new CHRConstraint(Locations.NO_LOCATION, INIT_CONSTRAINT, Type.EMPTY_ARRAY);
  88         constraints.add(initConstraint);
  89     }
  90
  91     public void resolve(TranslationContext context) {
  92         boolean failedIncludes = false;
  93         for(IncludeStatement include : includes) {
  94             try {
  95                 include.ruleset = context.resolveRuleset(include.name.text);
  96                 if(include.ruleset == null) {
  97                     failedIncludes = true;
  98                     context.getErrorLog().log(include.name.location, "Couldn't resolve ruleset " + include.name + ".");
  99                     continue;
 100                 }
 101                 include.value = include.value.resolve(context);
 102                 for(CHRConstraint constraint : include.ruleset.constraints) {
 103                     context.newCHRConstraint(constraint.name, constraint);
 104                     constraintSourceMap.put(constraint, include);
 105                 }
 106             } catch (AmbiguousNameException e) {
 107                 failedIncludes = true;
 108                 context.getErrorLog().log(include.name.location, e.getMessage());
 109             }
 110         }
 111         if(failedIncludes)
 112             return;
 113         for(CHRConstraint constraint : constraints)
 114             context.newCHRConstraint(constraint.name, constraint);
 115         priorityCount = 0;
 116         for(CHRRule rule : rules) {
 117             rule.resolve(context);
 118             rule.priority = priorityCount++;
 119         }
 120         /*for(CHRConstraint constraint : constraints) {
 121             Variable newVariable = context.newVariable("claim" + constraint.factClassName);
 122         }*/
 123     }
 124
 125     public void checkType(TypingContext context) {
 126         for(IncludeStatement include : includes)
 127             include.value = include.value.checkType(context, include.ruleset.runtimeRulesetType);
 128         for(CHRRule rule : rules)
 129             rule.checkType(context);
 130     }
 131
 132     public void collectVars(TObjectIntHashMap<Variable> allVars, TIntHashSet vars) {
 133         for(IncludeStatement include : includes)
 134             include.value.collectVars(allVars, vars);
 135         for(CHRRule rule : rules)
 136             rule.collectVars(allVars, vars);
 137     }
 138
 139     public void collectFreeVariables(THashSet<Variable> vars) {
 140         for(IncludeStatement include : includes)
 141             include.value.collectFreeVariables(vars);
 142         for(CHRRule rule : rules)
 143             rule.collectFreeVariables(vars);
 144     }
 145
 146     public void setLocationDeep(long loc) {
 147         if(location == Locations.NO_LOCATION) {
 148             this.location = loc;
 149             for(CHRRule rule : rules)
 150                 rule.setLocationDeep(loc);
 151         }
 152     }
 153
 154     public int getMinimumPriority(CHRConstraint constraint) {
 155         CHRConstraintGGInfo info = activeConstraintGGInfo.get(constraint);
 156         if(info == null)
 157             return Integer.MAX_VALUE;
 158         else
 159             return info.minimumPriority;
 160     }
 161
 162     public int getAndUpdateNextPriority(CHRConstraint constraint, int nextPriority) {
 163         CHRConstraintGGInfo info = activeConstraintGGInfo.get(constraint);
 164         if(info == null)
 165             return Integer.MAX_VALUE;
 166         else {
 167             int result = info.nextPriority;
 168             info.nextPriority = nextPriority;
 169             return result;
 170         }
 171     }
 172
 173     public void compile(SimplificationContext context) {
 174         initializeCodeGeneration(context.getCompilationContext());
 175         if(extensible)
 176             applyExtensibleDefaults();
 177         UsageAnalysis.analyzeUsage(this);
 178         for(CHRRule rule : rules) {
 179             rule.compile(context.getCompilationContext(), initConstraint);
 180             for(CHRSearchPlan plan : rule.plans) {
 181                 CHRConstraint constraint = plan.constraint;
 182                 if(!activeConstraintGGInfo.containsKey(constraint)) {
 183                     activeConstraintGGInfo.put(constraint, new CHRConstraintGGInfo(rule.priority));
 184                     IncludeStatement include = constraintSourceMap.get(constraint);
 185                     if(include != null) {
 186                         ArrayList<CHRConstraint> list = inverseActiveConstraintSourceMap.get(include);
 187                         if(list == null) {
 188                             list = new ArrayList<CHRConstraint>(4);
 189                             inverseActiveConstraintSourceMap.put(include, list);
 190                         }
 191                         list.add(constraint);
 192                     }
 193                 }
 194             }
 195         }
 196         // remove init constraint if it is not useful
 197         if(getMinimumPriority(initConstraint) == Integer.MAX_VALUE) {
 198             constraints.remove(0);
 199             initConstraint = null;
 200         }
 201     }
 202
 203     private void applyExtensibleDefaults() {
 204         for(CHRConstraint constraint : constraints) {
 205             // FIXME Too much indexing!!!
 206             int max = 1 << constraint.parameterTypes.length;
 207             for(int i=0;i<max;++i)
 208                 constraint.getOrCreateIndex(cachedContext, i);
 209             constraint.setMayBeRemoved();
 210             /*
 211             constraint.getOrCreateIndex(cachedContext, 0);
 212             if(constraint.parameterTypes.length > 0)
 213                 constraint.getOrCreateIndex(cachedContext, 1);*/
 214         }
 215     }
 216
 217     public void simplify(SimplificationContext context) {
 218         for(IncludeStatement include : includes)
 219             include.value = include.value.simplify(context);
 220         for(CHRRule rule : rules)
 221             rule.simplify(context);
 222     }
 223
 224     public void setRulesetType(TCon type, String className) {
 225         this.runtimeRulesetType = type;
 226         this.runtimeRulesetClassName = className;
 227     }
 228
 229     public void initializeCodeGeneration(CompilationContext context) {
 230         cachedContext = context; // FIXME remove
 231
 232         boolean createTypeDesc = false;
 233         if(runtimeRulesetType == null) {
 234             String suffix = context.namingPolicy.getFreshClosureClassNameSuffix();
 235             setRulesetType(Types.con(context.namingPolicy.getModuleName(), "CHR" + suffix), context.namingPolicy.getModuleClassName() + suffix);
 236             createTypeDesc = true;
 237         }
 238         runtimeRulesetTypeDesc = TypeDesc.forClass(runtimeRulesetClassName);
 239         runtimeRulesetVariable = new BoundVar(runtimeRulesetType);
 240         for(CHRConstraint constraint : constraints)
 241             constraint.initializeCodeGeneration(context, this);
 242         if(createTypeDesc && context.module != null) // for unit testing
 243             context.module.addTypeDescriptor(runtimeRulesetType.name, new StandardTypeConstructor(runtimeRulesetType, TVar.EMPTY_ARRAY, runtimeRulesetTypeDesc));
 244     }
 245
 246     public static final Constant ACTIVATE = new JavaMethod(true, CHRCodeGenerationConstants.CHRContext_name, "activate", Types.PROC, Types.UNIT, Types.CHRContext, Types.INTEGER);
 247     private static final Constant CREATE_CHR_CONTEXT = new JavaConstructor("org/simantics/scl/runtime/chr/CHRContext", Types.PROC, Types.CHRContext);
 248
 249     public IVal generateCode(CodeWriter w) {
 250         for(IncludeStatement include : includes) {
 251             include.storeVar = include.value.toVal(cachedContext, w);
 252             initialPriorityNumber = Math.max(initialPriorityNumber, include.ruleset.initialPriorityNumber + include.ruleset.priorityCount);
 253         }
 254         CHRRulesetObject object = new CHRRulesetObject(runtimeRulesetVariable, this);
 255         w.defineObject(object);
 256         for(CHRRule rule : rules) {
 257             for(CHRSearchPlan plan : rule.plans) {
 258                 /*System.out.println("    plan " + plan.priority);
 259                 for(PlanOp planOp : plan.ops)
 260                     System.out.println("        " + planOp);*/
 261                 CodeWriter methodWriter = object.createMethod(w.getModuleWriter(), TVar.EMPTY_ARRAY, Types.PROC, Types.BOOLEAN, new Type[] {Types.CHRContext, plan.constraint.factType});
 262                 plan.implementation = methodWriter.getFunction();
 263                 IVal[] implementationParameters = methodWriter.getParameters();
 264                 plan.activeFact.setVal(implementationParameters[1]);
 265                 PlanRealizer realizer = new PlanRealizer(cachedContext, this, runtimeRulesetVariable, implementationParameters[0], plan.ops);
 266                 realizer.nextOp(methodWriter);
 267                 if(methodWriter.isUnfinished())
 268                     methodWriter.return_(BooleanConstant.TRUE);
 269             }
 270         }
 271         if(!includes.isEmpty() || extensible) {
 272             {
 273                 CodeWriter methodWriter = object.createMethod(w.getModuleWriter(), TVar.EMPTY_ARRAY, Types.PROC, Types.UNIT, new Type[] {Types.CHRContext});
 274                 initializer = methodWriter.getFunction();
 275                 for(IncludeStatement include : includes) {
 276                     methodWriter.apply(include.location,
 277                             new JavaMethod(true, runtimeRulesetClassName, "register", Types.PROC, Types.UNIT, new Type[] {runtimeRulesetType, Types.CHRContext, include.ruleset.runtimeRulesetType}),
 278                             object.getTarget(), methodWriter.getParameters()[0], include.storeVar);
 279                 }
 280                 if(extensible)
 281                         methodWriter.apply(Locations.NO_LOCATION,
 282                                 new JavaMethod(true, runtimeRulesetClassName, "register", Types.PROC, Types.UNIT, new Type[] {runtimeRulesetType, Types.CHRContext}),
 283                                 object.getTarget(), methodWriter.getParameters()[0]);
 284                 methodWriter.return_(NoRepConstant.UNIT);
 285             }
 286             {
 287                 CodeWriter methodWriter = object.createMethod(w.getModuleWriter(), TVar.EMPTY_ARRAY, Types.PROC, Types.UNIT, new Type[] {Types.CHRContext});
 288                 deinitializer = methodWriter.getFunction();
 289                 for(IncludeStatement include : includes) {
 290                     methodWriter.apply(include.location,
 291                             new JavaMethod(true, runtimeRulesetClassName, "unregister", Types.PROC, Types.UNIT, new Type[] {runtimeRulesetType, Types.CHRContext, include.ruleset.runtimeRulesetType}),
 292                             object.getTarget(), methodWriter.getParameters()[0], include.storeVar);
 293                 }
 294                 if(extensible)
 295                         methodWriter.apply(Locations.NO_LOCATION,
 296                                 new JavaMethod(true, runtimeRulesetClassName, "unregister", Types.PROC, Types.UNIT, new Type[] {runtimeRulesetType, Types.CHRContext}),
 297                                 object.getTarget(), methodWriter.getParameters()[0]);
 298                 methodWriter.return_(NoRepConstant.UNIT);
 299             }
 300         }
 301         if(initConstraint != null) {
 302             IVal chrContext = w.apply(location, CREATE_CHR_CONTEXT);
 303             if(initializer != null) {
 304                 w.apply(location,
 305                         new JavaMethod(true, runtimeRulesetClassName, "initialize", Types.PROC, Types.UNIT, new Type[] {runtimeRulesetType, Types.CHRContext}),
 306                         object.getTarget(), chrContext);
 307             }
 308             IVal initFact = w.apply(location, initConstraint.constructor, w.apply(location, GENERATE_ID, chrContext));
 309             w.apply(location, initConstraint.addProcedure, runtimeRulesetVariable, chrContext, initFact);
 310             w.apply(location, ACTIVATE, chrContext, new IntegerConstant(Integer.MAX_VALUE));
 311             if(deinitializer != null) {
 312                 w.apply(location,
 313                         new JavaMethod(true, runtimeRulesetClassName, "deinitialize", Types.PROC, Types.UNIT, new Type[] {runtimeRulesetType, Types.CHRContext}),
 314                         object.getTarget(), chrContext);
 315             }
 316         }
 317         return runtimeRulesetVariable;
 318     }
 319
 320     public void collectEffects(THashSet<Type> effects) {
 321         for(CHRRule rule : rules) {
 322             for(CHRLiteral literal : rule.head.literals)
 323                 literal.collectQueryEffects(effects);
 324             for(CHRLiteral literal : rule.head.literals)
 325                 literal.collectEnforceEffects(effects);
 326         }
 327     }
 328
 329     public void addRule(CHRRule rule) {
 330         rules.add(rule);
 331         rule.parentRuleset = this;
 332     }
 333 }