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Fix dist weights ignored when an item is not a literal (#8003)

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BRDR LIFE
2026-07-31 10:54:38 +05:30
committed by GitHub
parent 9cddf46932
commit 40323cc02c
3 changed files with 205 additions and 1 deletions
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src/V3Width.cpp
+8 -1
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@@ -3521,7 +3521,14 @@ class WidthVisitor final : public VNVisitor {
bool canLower = true;
for (AstDistItem* ditemp = nodep->itemsp(); ditemp;
ditemp = VN_AS(ditemp->nextp(), DistItem)) {
if (!VN_IS(ditemp->rangep(), Const) && !VN_IS(ditemp->rangep(), InsideRange)) {
if (VN_IS(ditemp->rangep(), InsideRange)) continue;
// An integral item is a plain equality on either path, so it may be
// non-constant. Testing for AstConst here instead would silently drop
// the weights of a dist whose items are state variables. Compound
// items (containers, strings) still need insideItem(), and an impure
// item must not be cloned into the bucket chain.
const AstNodeDType* const itemDtp = ditemp->rangep()->dtypep()->skipRefp();
if (!itemDtp->isIntegralOrPacked() || !ditemp->rangep()->isPure()) {
canLower = false;
break;
}