diff options
Diffstat (limited to 'passes/opt/opt.cc')
| -rw-r--r-- | passes/opt/opt.cc | 25 |
1 files changed, 24 insertions, 1 deletions
diff --git a/passes/opt/opt.cc b/passes/opt/opt.cc index 9e33f78c..b742a095 100644 --- a/passes/opt/opt.cc +++ b/passes/opt/opt.cc @@ -26,7 +26,30 @@ bool OPT_DID_SOMETHING; struct OptPass : public Pass { - OptPass() : Pass("opt") { } + OptPass() : Pass("opt", "perform simple optimizations") { } + virtual void help() + { + // |---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---| + log("\n"); + log(" opt [selection]\n"); + log("\n"); + log("This pass calls all the other opt_* passes in a useful manner. This performs\n"); + log("a series of trivial optimizations and cleanups. This pass executes the other\n"); + log("passes in the following order:\n"); + log("\n"); + log(" opt_const\n"); + log(" opt_share -nomux\n"); + log("\n"); + log(" do\n"); + log(" opt_muxtree\n"); + log(" opt_reduce\n"); + log(" opt_share\n"); + log(" opt_rmdff\n"); + log(" opt_rmunused\n"); + log(" opt_const\n"); + log(" while [changed design]\n"); + log("\n"); + } virtual void execute(std::vector<std::string> args, RTLIL::Design *design) { log_header("Executing OPT pass (performing simple optimizations).\n"); |