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Fix multitop cross references (#6699).

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This commit is contained in:
Wilson Snyder
2025-11-26 06:09:29 -05:00
parent 9155e2529b
commit 8293a8d035
23 changed files with 133 additions and 74 deletions
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src/V3Dead.cpp
+2 -3
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@@ -392,8 +392,7 @@ class DeadVisitor final : public VNVisitor {
AstNodeModule* nextmodp;
for (AstNodeModule* modp = v3Global.rootp()->modulesp(); modp; modp = nextmodp) {
nextmodp = VN_AS(modp->nextp(), NodeModule);
if (modp->dead()
|| (modp->level() > 2 && modp->user1() == 0 && !modp->internal())) {
if (modp->dead() || (!modp->isTop() && modp->user1() == 0 && !modp->internal())) {
// > 2 because L1 is the wrapper, L2 is the top user module
UINFO(4, " Dead module " << modp);
// And its children may now be killable too; correct counts
@@ -518,7 +517,7 @@ class DeadVisitor final : public VNVisitor {
// cppcheck-suppress constParameterPointer
void preserveTopIfaces(AstNetlist* rootp) {
// cppcheck-suppress constVariablePointer
for (AstNodeModule* modp = rootp->modulesp(); modp && modp->level() <= 2;
for (AstNodeModule* modp = rootp->modulesp(); modp && modp->isTop();
modp = VN_AS(modp->nextp(), NodeModule)) {
for (AstNode* subnodep = modp->stmtsp(); subnodep; subnodep = subnodep->nextp()) {
if (AstVar* const varp = VN_CAST(subnodep, Var)) {