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Support this.randomize() with constraints (#6634)

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This commit is contained in:
Artur Bieniek
2025-11-04 08:28:42 -05:00
committed by GitHub
parent ea75163567
commit 8eed4e32ba
3 changed files with 65 additions and 1 deletions
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src/V3Randomize.cpp
+16 -1
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@@ -914,7 +914,22 @@ class ConstraintExprVisitor final : public VNVisitor {
if (nodep->user1()) {
nodep->v3warn(CONSTRAINTIGN, "Global constraints ignored (unsupported)");
}
editFormat(nodep);
// Handle MemberSel references created by captureRefByThis()
if (VN_IS(nodep->fromp(), VarRef)
&& nodep->fromp()->user1() // Depending on a randomized variable
&& nodep->user2p() // Pointer to containing module
&& VN_AS(nodep->user2p(), NodeModule) == nodep->varp()->user2p()) {
// Convert to VarRef
AstVarRef* const varRefp
= new AstVarRef{nodep->fileline(), nodep->varp(), VAccess::READ};
varRefp->user1(nodep->varp()->rand().isRandomizable());
varRefp->classOrPackagep(VN_AS(nodep->user2p(), NodeModule));
nodep->replaceWith(varRefp);
VL_DO_DANGLING(pushDeletep(nodep), nodep);
visit(varRefp);
} else {
editFormat(nodep);
}
}
void visit(AstSFormatF* nodep) override {}
void visit(AstStmtExpr* nodep) override {}