diff options
Diffstat (limited to 'passes/opt/opt.cc')
| -rw-r--r-- | passes/opt/opt.cc | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/passes/opt/opt.cc b/passes/opt/opt.cc index 62aa48bee..33e1507bc 100644 --- a/passes/opt/opt.cc +++ b/passes/opt/opt.cc @@ -31,7 +31,7 @@ struct OptPass : public Pass { { // |---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---| log("\n"); - log(" opt [-purge] [-mux_undef] [-mux_bool] [-undriven] [-fine] [selection]\n"); + log(" opt [options] [selection]\n"); log("\n"); log("This pass calls all the other opt_* passes in a useful order. This performs\n"); log("a series of trivial optimizations and cleanups. This pass executes the other\n"); @@ -46,8 +46,11 @@ struct OptPass : public Pass { log(" opt_share\n"); log(" opt_rmdff\n"); log(" opt_clean [-purge]\n"); - log(" opt_const [-mux_undef] [-mux_bool] [-undriven] [-fine]\n"); - log(" while [changed design]\n"); + log(" opt_const [-mux_undef] [-mux_bool] [-undriven] [-fine] [-keepdc]\n"); + log(" while <changed design>\n"); + log("\n"); + log("Note: Options in square brackets (such as [-keepdc]) are passed through to\n"); + log("the opt_* commands when given to 'opt'.\n"); log("\n"); } virtual void execute(std::vector<std::string> args, RTLIL::Design *design) @@ -82,6 +85,10 @@ struct OptPass : public Pass { opt_reduce_args += " -fine"; continue; } + if (args[argidx] == "-keepdc") { + opt_const_args += " -keepdc"; + continue; + } break; } extra_args(args, argidx, design); |