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Internals: Four-state pre-pull cleanup (#7281)

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This commit is contained in:
Igor Zaworski
2026-03-20 12:11:22 -04:00
committed by GitHub
parent b71abb0032
commit 331cac2054
25 changed files with 311 additions and 244 deletions
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src/V3Const.cpp
+7 -1
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@@ -1599,7 +1599,13 @@ class ConstVisitor final : public VNVisitor {
static bool operandsSame(const AstNode* node1p, const AstNode* node2p) {
// For now we just detect constants & simple vars, though it could be more generic
if (VN_IS(node1p, Const) && VN_IS(node2p, Const)) return node1p->sameGateTree(node2p);
if (const AstConst* const const1p = VN_CAST(node1p, Const)) {
if (const AstConst* const const2p = VN_CAST(node2p, Const)) {
return V3Number{node1p->fileline(), 1, 0}
.opEq(const1p->num(), const2p->num())
.isEqOne();
}
}
if (VN_IS(node1p, VarRef) && VN_IS(node2p, VarRef)) {
// Avoid comparing widthMin's, which results in lost optimization attempts
// If cleanup sameGateTree to be smarter, this can be restored.