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functional backend: error out if multiply driven or undriven signals are seen, dont bother putting them in functionalir

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This commit is contained in:
Emily Schmidt
2024-07-18 14:23:00 +01:00
parent 145af6f10d
commit 6d329e142d
4 changed files with 5 additions and 34 deletions
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1
backends/functional/cxx.cc
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@@ -154,7 +154,6 @@ template<class NodePrinter> struct CxxPrintVisitor : public FunctionalIR::Abstra
void state(Node, IdString name) override { print("current_state.{}", state_struct[name]); }
void memory_read(Node, Node mem, Node addr) override { print("{}.read({})", mem, addr); }
void memory_write(Node, Node mem, Node addr, Node data) override { print("{}.write({}, {})", mem, addr, data); }
void undriven(Node, int width) override { print("Signal<{}>(0)", width); }
};
struct CxxModule {

5
backends/functional/smtlib.cc
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@@ -180,8 +180,6 @@ struct SmtPrintVisitor : public FunctionalIR::AbstractVisitor<SExpr> {
SExpr input(Node, IdString name) override { return input_struct.access("inputs", name); }
SExpr state(Node, IdString name) override { return state_struct.access("state", name); }
SExpr undriven(Node, int width) override { return literal(RTLIL::Const(State::S0, width)); }
};
struct SmtModule {
@@ -227,8 +225,7 @@ struct SmtModule {
list("state", state_struct.name)),
list("Pair", output_struct.name, state_struct.name)));
auto inlined = [&](FunctionalIR::Node n) {
return n.fn() == FunctionalIR::Fn::constant ||
n.fn() == FunctionalIR::Fn::undriven;
return n.fn() == FunctionalIR::Fn::constant;
};
SmtPrintVisitor visitor(input_struct, state_struct);
auto node_to_sexpr = [&](FunctionalIR::Node n) -> SExpr {