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Fix clocking unsupported tristate assign error (#6942).

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Fixes #6942.
This commit is contained in:
Wilson Snyder
2026-01-18 16:28:48 -05:00
parent 3a080ef543
commit db9bd3a792
3 changed files with 46 additions and 7 deletions
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src/V3Tristate.cpp
+8 -7
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@@ -316,17 +316,16 @@ public:
const TristateVertex* const vertexp = reinterpret_cast<TristateVertex*>(nodep->user4p());
return vertexp && vertexp->feedsTri();
}
void didProcess(AstNode* nodep) {
TristateVertex* const vertexp = reinterpret_cast<TristateVertex*>(nodep->user4p());
if (!vertexp) {
void didProcess(AstNode* nodep, bool quiet = false) {
if (TristateVertex* const vertexp = reinterpret_cast<TristateVertex*>(nodep->user4p())) {
// We don't warn if no vertexp->isTristate() as the creation
// process makes midling nodes that don't have it set
vertexp->processed(true);
} else if (!quiet) {
// Not v3errorSrc as no reason to stop the world
nodep->v3warn(E_UNSUPPORTED,
"Unsupported tristate construct (not in propagation graph): "
<< nodep->prettyTypeName());
} else {
// We don't warn if no vertexp->isTristate() as the creation
// process makes midling nodes that don't have it set
vertexp->processed(true);
}
}
// ITERATOR METHODS
@@ -1340,6 +1339,8 @@ class TristateVisitor final : public TristateBaseVisitor {
nodep->rhsp()->user1p(nullptr);
UINFO(9, " enp<-rhs " << nodep->lhsp()->user1p());
m_tgraph.didProcess(nodep);
} else {
m_tgraph.didProcess(nodep, true);
}
m_alhs = true; // And user1p() will indicate tristate equation, if any
if (AstAssignW* const assignWp = VN_CAST(nodep, AssignW)) {