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Internals: Optimize empty 'if' into StmtExpr

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This commit is contained in:
Wilson Snyder
2025-08-08 05:10:40 -04:00
parent 6a225d5d00
commit d1f851e1e1
5 changed files with 18 additions and 6 deletions
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src/V3Randomize.cpp
+4 -2
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@@ -241,7 +241,8 @@ class RandomizeMarkVisitor final : public VNVisitor {
methodHardp->v3fatalSrc("Unknown rand_mode() receiver");
}
}
if (!nodep->pinsp() && VN_IS(nodep->backp(), StmtExpr)) {
if (!nodep->pinsp() && VN_IS(nodep->backp(), StmtExpr)
&& !nodep->backp()->fileline()->warnIsOff(V3ErrorCode::IGNOREDRETURN)) {
nodep->v3warn(
IGNOREDRETURN,
"Ignoring return value of non-void function (IEEE 1800-2023 13.4.1)");
@@ -302,7 +303,8 @@ class RandomizeMarkVisitor final : public VNVisitor {
nodep->v3error(
"'constraint_mode()' with arguments cannot be called as a function");
valid = false;
} else if (!nodep->pinsp() && VN_IS(nodep->backp(), StmtExpr)) {
} else if (!nodep->pinsp() && VN_IS(nodep->backp(), StmtExpr)
&& !nodep->backp()->fileline()->warnIsOff(V3ErrorCode::IGNOREDRETURN)) {
nodep->v3warn(
IGNOREDRETURN,
"Ignoring return value of non-void function (IEEE 1800-2023 13.4.1)");