virtual void visit(AstSel* nodep, AstNUser*) {
AstVarRef* varrefp = nodep->fromp()->castVarRef();
AstConst* constp = nodep->lsbp()->castConst();
if (varrefp && constp && !constp->num().isFourState()) {
UndrivenVarEntry* entryp = getEntryp (varrefp->varp());
int lsb = constp->toUInt();
if (m_markBoth || varrefp->lvalue()) entryp->drivenBit(lsb, nodep->width());
if (m_markBoth || !varrefp->lvalue()) entryp->usedBit(lsb, nodep->width());
} else {
// else other varrefs handled as unknown mess in AstVarRef
nodep->iterateChildren(*this);
}
}
virtual void visit(AstSel* nodep, AstNUser*) {
AstVarRef* varrefp = nodep->fromp()->castVarRef();
AstConst* constp = nodep->lsbp()->castConst();
if (varrefp && constp && !constp->num().isFourState()) {
for (int usr=1; usr<(m_alwaysp?3:2); ++usr) {
UndrivenVarEntry* entryp = getEntryp (varrefp->varp(), usr);
int lsb = constp->toUInt();
if (m_markBoth || varrefp->lvalue()) {
// Don't warn if already driven earlier as "a=0; if(a) a=1;" is fine.
if (usr==2 && m_alwaysp && entryp->isUsedNotDrivenBit(lsb, nodep->width())) {
UINFO(9," Select. Entryp="<<(void*)entryp<<endl);
warnAlwCombOrder(varrefp);
}
entryp->drivenBit(lsb, nodep->width());
}
if (m_markBoth || !varrefp->lvalue()) entryp->usedBit(lsb, nodep->width());
}
} else {
// else other varrefs handled as unknown mess in AstVarRef
nodep->iterateChildren(*this);
}
}