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Support virtual interfaces (#3654)

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This commit is contained in:
Arkadiusz Kozdra
2022-10-20 06:31:00 -04:00
committed by GitHub
parent e6add5e0b8
commit 0e4da3b0bf
25 changed files with 440 additions and 45 deletions
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src/V3Dead.cpp
+14 -1
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@@ -198,6 +198,19 @@ private:
}
if (nodep->classp()) nodep->classp()->user1Inc();
}
void visit(AstIfaceRefDType* nodep) override {
iterateChildren(nodep);
checkDType(nodep);
checkAll(nodep);
if (nodep->modportp()) {
if (m_elimCells) {
nodep->modportp(nullptr);
} else {
nodep->modportp()->user1Inc();
}
}
if (nodep->ifaceViaCellp()) nodep->ifaceViaCellp()->user1Inc();
}
void visit(AstNodeDType* nodep) override {
iterateChildren(nodep);
checkDType(nodep);
@@ -321,7 +334,7 @@ private:
}
bool mightElimVar(AstVar* nodep) const {
if (nodep->isSigPublic()) return false; // Can't elim publics!
if (nodep->isIO() || nodep->isClassMember()) return false;
if (nodep->isIO() || nodep->isClassMember() || nodep->isUsedVirtIface()) return false;
if (nodep->isTemp() && !nodep->isTrace()) return true;
return m_elimUserVars; // Post-Trace can kill most anything
}