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Internals: Preserve arrays of modports. Part of #2614.

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This commit is contained in:
Wilson Snyder 2020-11-08 19:15:53 -05:00
parent d78941885b
commit 67d5b1a11a
1 changed files with 23 additions and 4 deletions
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27
src/V3LinkDot.cpp
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@ -1866,14 +1866,16 @@ private:
}
}
AstVar* makeIfaceModportVar(FileLine* fl, AstCell* cellp, AstIface* ifacep,
AstModport* modportp) {
AstModport* modportp, AstRange* rangep) {
// Create iface variable, using duplicate var when under same module scope
string varName
= cellp->name() + "__Vmp__" + modportp->name() + "__Viftop" + cvtToStr(++m_modportNum);
AstIfaceRefDType* idtypep = new AstIfaceRefDType(fl, modportp->fileline(), cellp->name(),
ifacep->name(), modportp->name());
idtypep->cellp(cellp);
AstVar* varp = new AstVar(fl, AstVarType::IFACEREF, varName, VFlagChildDType(), idtypep);
AstNodeDType* vdtypep = idtypep;
if (rangep) vdtypep = new AstUnpackArrayDType(fl, VFlagChildDType(), vdtypep, rangep);
AstVar* varp = new AstVar(fl, AstVarType::IFACEREF, varName, VFlagChildDType(), vdtypep);
varp->isIfaceParent(true);
m_modp->addStmtp(varp);
return varp;
@ -2277,8 +2279,25 @@ private:
m_ds.m_dotSymp = m_statep->getNodeSym(modportp);
m_ds.m_dotPos = DP_SCOPE;
ok = true;
AstVar* varp = makeIfaceModportVar(nodep->fileline(), cellp, ifacep, modportp);
AstVarRef* refp = new AstVarRef(varp->fileline(), varp, VAccess::READ);
auto* cellarrayrefp = VN_CAST(m_ds.m_unlinkedScopep, CellArrayRef);
AstRange* rangep = nullptr;
if (cellarrayrefp)
rangep = new AstRange(nodep->fileline(),
cellarrayrefp->selp()->cloneTree(true),
cellarrayrefp->selp()->cloneTree(true));
AstVar* varp
= makeIfaceModportVar(nodep->fileline(), cellp, ifacep, modportp, rangep);
AstNode* refp = new AstVarRef(varp->fileline(), varp, VAccess::READ);
if (cellarrayrefp) {
// iface[vec].modport became CellArrayRef(iface, lsb)
// Convert back to SelBit(iface, lsb)
UINFO(9, " Array modport to SelBit " << cellarrayrefp << endl);
refp = new AstSelBit(cellarrayrefp->fileline(), refp,
cellarrayrefp->selp()->unlinkFrBack());
refp->user3(true); // Don't process again
VL_DO_DANGLING(cellarrayrefp->unlinkFrBack(), cellarrayrefp);
m_ds.m_unlinkedScopep = nullptr;
}
nodep->replaceWith(refp);
VL_DO_DANGLING(pushDeletep(nodep), nodep);
}