Examples with WhileStatementBlock org.apache.sysml.parser.WhileStatementBlock used on opensource projects

Example 41 with WhileStatementBlock

use of org.apache.sysml.parser.WhileStatementBlock in project incubator-systemml by apache.

the class InterProceduralAnalysis method propagateStatisticsAcrossBlock.

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// INTRA-PROCEDURE ANALYSIS
//////	
/**
	 * Perform intra-procedural analysis (IPA) by propagating statistics
	 * across statement blocks.
	 *
	 * @param sb  DML statement blocks.
	 * @param fcand  Function candidates.
	 * @param callVars  Map of variables eligible for propagation.
	 * @param fcandSafeNNZ  Function candidate safe non-zeros.
	 * @param unaryFcands  Unary function candidates.
	 * @param fnStack  Function stack to determine current scope.
	 * @throws HopsException  If a HopsException occurs.
	 * @throws ParseException  If a ParseException occurs.
	 */
private void propagateStatisticsAcrossBlock(StatementBlock sb, Map<String, Integer> fcand, LocalVariableMap callVars, Map<String, Set<Long>> fcandSafeNNZ, Set<String> unaryFcands, Set<String> fnStack) throws HopsException, ParseException {
    if (sb instanceof FunctionStatementBlock) {
        FunctionStatementBlock fsb = (FunctionStatementBlock) sb;
        FunctionStatement fstmt = (FunctionStatement) fsb.getStatement(0);
        for (StatementBlock sbi : fstmt.getBody()) propagateStatisticsAcrossBlock(sbi, fcand, callVars, fcandSafeNNZ, unaryFcands, fnStack);
    } else if (sb instanceof WhileStatementBlock) {
        WhileStatementBlock wsb = (WhileStatementBlock) sb;
        WhileStatement wstmt = (WhileStatement) wsb.getStatement(0);
        //old stats into predicate
        propagateStatisticsAcrossPredicateDAG(wsb.getPredicateHops(), callVars);
        //remove updated constant scalars
        Recompiler.removeUpdatedScalars(callVars, wsb);
        //check and propagate stats into body
        LocalVariableMap oldCallVars = (LocalVariableMap) callVars.clone();
        for (StatementBlock sbi : wstmt.getBody()) propagateStatisticsAcrossBlock(sbi, fcand, callVars, fcandSafeNNZ, unaryFcands, fnStack);
        if (Recompiler.reconcileUpdatedCallVarsLoops(oldCallVars, callVars, wsb)) {
            //second pass if required
            propagateStatisticsAcrossPredicateDAG(wsb.getPredicateHops(), callVars);
            for (StatementBlock sbi : wstmt.getBody()) propagateStatisticsAcrossBlock(sbi, fcand, callVars, fcandSafeNNZ, unaryFcands, fnStack);
        }
        //remove updated constant scalars
        Recompiler.removeUpdatedScalars(callVars, sb);
    } else if (sb instanceof IfStatementBlock) {
        IfStatementBlock isb = (IfStatementBlock) sb;
        IfStatement istmt = (IfStatement) isb.getStatement(0);
        //old stats into predicate
        propagateStatisticsAcrossPredicateDAG(isb.getPredicateHops(), callVars);
        //check and propagate stats into body
        LocalVariableMap oldCallVars = (LocalVariableMap) callVars.clone();
        LocalVariableMap callVarsElse = (LocalVariableMap) callVars.clone();
        for (StatementBlock sbi : istmt.getIfBody()) propagateStatisticsAcrossBlock(sbi, fcand, callVars, fcandSafeNNZ, unaryFcands, fnStack);
        for (StatementBlock sbi : istmt.getElseBody()) propagateStatisticsAcrossBlock(sbi, fcand, callVarsElse, fcandSafeNNZ, unaryFcands, fnStack);
        callVars = Recompiler.reconcileUpdatedCallVarsIf(oldCallVars, callVars, callVarsElse, isb);
        //remove updated constant scalars
        Recompiler.removeUpdatedScalars(callVars, sb);
    } else if (//incl parfor
    sb instanceof ForStatementBlock) {
        ForStatementBlock fsb = (ForStatementBlock) sb;
        ForStatement fstmt = (ForStatement) fsb.getStatement(0);
        //old stats into predicate
        propagateStatisticsAcrossPredicateDAG(fsb.getFromHops(), callVars);
        propagateStatisticsAcrossPredicateDAG(fsb.getToHops(), callVars);
        propagateStatisticsAcrossPredicateDAG(fsb.getIncrementHops(), callVars);
        //remove updated constant scalars
        Recompiler.removeUpdatedScalars(callVars, fsb);
        //check and propagate stats into body
        LocalVariableMap oldCallVars = (LocalVariableMap) callVars.clone();
        for (StatementBlock sbi : fstmt.getBody()) propagateStatisticsAcrossBlock(sbi, fcand, callVars, fcandSafeNNZ, unaryFcands, fnStack);
        if (Recompiler.reconcileUpdatedCallVarsLoops(oldCallVars, callVars, fsb))
            for (StatementBlock sbi : fstmt.getBody()) propagateStatisticsAcrossBlock(sbi, fcand, callVars, fcandSafeNNZ, unaryFcands, fnStack);
        //remove updated constant scalars
        Recompiler.removeUpdatedScalars(callVars, sb);
    } else //generic (last-level)
    {
        //remove updated constant scalars
        Recompiler.removeUpdatedScalars(callVars, sb);
        //old stats in, new stats out if updated
        ArrayList<Hop> roots = sb.get_hops();
        DMLProgram prog = sb.getDMLProg();
        //replace scalar reads with literals
        Hop.resetVisitStatus(roots);
        propagateScalarsAcrossDAG(roots, callVars);
        //refresh stats across dag
        Hop.resetVisitStatus(roots);
        propagateStatisticsAcrossDAG(roots, callVars);
        //propagate stats into function calls
        Hop.resetVisitStatus(roots);
        propagateStatisticsIntoFunctions(prog, roots, fcand, callVars, fcandSafeNNZ, unaryFcands, fnStack);
    }
}