Esempio n. 1
0
    // VISITs
    virtual void visit(AstNetlist* nodep, AstNUser*) {
	AstNode::user1ClearTree();
	readModNames();
	nodep->iterateChildren(*this);
	// Find levels in graph
	m_graph.removeRedundantEdges(&V3GraphEdge::followAlwaysTrue);
	m_graph.dumpDotFilePrefixed("linkcells");
	m_graph.rank();
	for (V3GraphVertex* itp = m_graph.verticesBeginp(); itp; itp=itp->verticesNextp()) {
	    if (LinkCellsVertex* vvertexp = dynamic_cast<LinkCellsVertex*>(itp)) {
		// +1 so we leave level 1  for the new wrapper we'll make in a moment
		AstNodeModule* modp = vvertexp->modp();
		modp->level(vvertexp->rank()+1);
		if (vvertexp == m_topVertexp && modp->level() != 2) {
		    AstNodeModule* abovep = NULL;
		    if (V3GraphEdge* edgep = vvertexp->inBeginp()) {
			if (LinkCellsVertex* eFromVertexp = dynamic_cast<LinkCellsVertex*>(edgep->fromp())) {
			    abovep = eFromVertexp->modp();
			}
		    }
		    v3error("Specified --top-module '"<<v3Global.opt.topModule()
			    <<"' isn't at the top level, it's under another cell '"
			    <<(abovep ? abovep->prettyName() : "UNKNOWN")<<"'");
		}
	    }
	}
	if (v3Global.opt.topModule()!=""
	    && !m_topVertexp) {
	    v3error("Specified --top-module '"<<v3Global.opt.topModule()<<"' was not found in design.");
	}
    }
Esempio n. 2
0
void V3LinkLevel::wrapTop(AstNetlist* netlistp) {
    UINFO(2,__FUNCTION__<<": "<<endl);
    // We do ONLY the top module
    AstNodeModule* oldmodp = netlistp->modulesp();
    if (!oldmodp) netlistp->v3fatalSrc("No module found to process");
    AstNodeModule* newmodp = new AstModule(oldmodp->fileline(), (string)"TOP_"+oldmodp->name());
    // Make the new module first in the list
    oldmodp->unlinkFrBackWithNext();
    newmodp->addNext(oldmodp);
    newmodp->level(1);
    newmodp->modPublic(true);
    netlistp->addModulep(newmodp);

    // TODO the module creation above could be done after linkcells, but
    // the rest must be done after data type resolution
    wrapTopCell(netlistp);
    wrapTopPackages(netlistp);
}
Esempio n. 3
0
    // METHODS
    void deadCheckMod() {
	// Kill any unused modules
	// V3LinkCells has a graph that is capable of this too, but we need to do it
	// after we've done all the generate blocks
	for (bool retry=true; retry; ) {
	    retry=false;
	    AstNodeModule* nextmodp;
	    for (AstNodeModule* modp = v3Global.rootp()->modulesp(); modp; modp=nextmodp) {
		nextmodp = modp->nextp()->castNodeModule();
		if (modp->level()>2	&& modp->user1()==0 && !modp->internal()) {
		    // > 2 because L1 is the wrapper, L2 is the top user module
		    UINFO(4,"  Dead module "<<modp<<endl);
		    // And its children may now be killable too; correct counts
		    // Recurse, as cells may not be directly under the module but in a generate
		    DeadModVisitor visitor(modp);
		    modp->unlinkFrBack()->deleteTree(); VL_DANGLING(modp);
		    retry = true;
		}
	    }
	}
    }
Esempio n. 4
0
void V3LinkLevel::modSortByLevel() {
    // Sort modules by levels, root down to lowest children
    // Calculate levels again in case we added modules
    UINFO(2,"modSortByLevel()\n");

    // level() was computed for us in V3LinkCells

    typedef vector<AstNodeModule*> ModVec;

    ModVec vec;
    AstNodeModule* topp = NULL;
    for (AstNodeModule* nodep = v3Global.rootp()->modulesp(); nodep; nodep=nodep->nextp()->castNodeModule()) {
	if (nodep->level()<=2) {
	    if (topp) {
		nodep->v3warn(E_MULTITOP, "Unsupported: Multiple top level modules: "
			      <<nodep->prettyName()<<" and "<<topp->prettyName());
		nodep->v3warn(E_MULTITOP, "Fix, or use --top-module option to select which you want.");
	    }
	    topp = nodep;
	}
	vec.push_back(nodep);
    }
    stable_sort(vec.begin(), vec.end(), CmpLevel()); // Sort the vector
    UINFO(9,"modSortByLevel() sorted\n");  // Comment required for gcc4.6.3 / bug666
    for (ModVec::iterator it = vec.begin(); it != vec.end(); ++it) {
	AstNodeModule* nodep = *it;
	nodep->clearIter();  // Because we didn't iterate to find the node pointers, may have a stale m_iterp() needing cleanup
	nodep->unlinkFrBack();
    }
    if (v3Global.rootp()->modulesp()) v3Global.rootp()->v3fatalSrc("Unlink didn't work");
    for (ModVec::iterator it = vec.begin(); it != vec.end(); ++it) {
	AstNodeModule* nodep = *it;
	v3Global.rootp()->addModulep(nodep);
    }
    UINFO(9,"modSortByLevel() done\n");  // Comment required for gcc4.6.3 / bug666
    V3Global::dumpCheckGlobalTree("cells.tree", false, v3Global.opt.dumpTreeLevel(__FILE__) >= 3);
}