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Support foreach constraints (#5302)

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Signed-off-by: Arkadiusz Kozdra <[email protected]>
This commit is contained in:
Arkadiusz Kozdra
2024-08-02 10:03:55 -04:00
committed by GitHub
parent a61178bd89
commit 54f9f4b6a9
5 changed files with 108 additions and 11 deletions
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src/V3Randomize.cpp
+24 -2
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@@ -513,9 +513,31 @@ class ConstraintExprVisitor final : public VNVisitor {
}
VL_DO_DANGLING(nodep->deleteTree(), nodep);
}
void visit(AstForeach* nodep) override {}
void visit(AstConstraintForeach* nodep) override {
nodep->v3warn(CONSTRAINTIGN, "Constraint expression ignored (unsupported)");
VL_DO_DANGLING(nodep->unlinkFrBack()->deleteTree(), nodep);
// Convert to plain foreach
FileLine* const fl = nodep->fileline();
if (m_wantSingle) {
AstNode* const itemp = editSingle(fl, nodep->stmtsp());
AstNode* const cstmtp = new AstText{fl, "ret += \" \" + "};
cstmtp->addNext(itemp);
cstmtp->addNext(new AstText{fl, ";"});
AstNode* const exprsp = new AstText{fl, "([&]{ std::string ret = \"(and\";"};
exprsp->addNext(new AstBegin{
fl, "",
new AstForeach{fl, nodep->arrayp()->unlinkFrBack(), new AstCStmt{fl, cstmtp}},
false, true});
exprsp->addNext(new AstText{fl, "return ret + \")\"; })()"});
AstNodeExpr* const newp = new AstCExpr{fl, exprsp};
newp->dtypeSetString();
nodep->replaceWith(new AstSFormatF{fl, "%@", false, newp});
} else {
iterateAndNextNull(nodep->stmtsp());
nodep->replaceWith(new AstForeach{fl, nodep->arrayp()->unlinkFrBack(),
nodep->stmtsp()->unlinkFrBackWithNext()});
}
VL_DO_DANGLING(nodep->deleteTree(), nodep);
}
void visit(AstConstraintBefore* nodep) override {
nodep->v3warn(CONSTRAINTIGN, "Constraint expression ignored (unsupported)");