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Added help messages for opt_* passes

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This commit is contained in:
Clifford Wolf 2013-03-01 08:58:55 +01:00
parent 1bc0f04789
commit 36954471a6
7 changed files with 127 additions and 11 deletions
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17
passes/opt/opt_reduce.cc
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@ -216,7 +216,22 @@ struct OptReduceWorker
};
struct OptReducePass : public Pass {
OptReducePass() : Pass("opt_reduce") { }
OptReducePass() : Pass("opt_reduce", "simplify large MUXes and AND/OR gates") { }
virtual void help()
{
// |---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|
log("\n");
log(" opt_reduce [selection]\n");
log("\n");
log("This pass performs two interlinked optimizations:\n");
log("\n");
log("1. it consolidates trees of large AND gates or OR gates and eliminates\n");
log("duplicated inputs.\n");
log("\n");
log("2. it identifies duplicated inputs to MUXes and replaces them with a single\n");
log("input with the original control signals OR'ed together.\n");
log("\n");
}
virtual void execute(std::vector<std::string> args, RTLIL::Design *design)
{
log_header("Executing OPT_REDUCE pass (consolidate $*mux and $reduce_* inputs).\n");