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Added "opt_const -keepdc"

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This commit is contained in:
Clifford Wolf 2014-07-21 21:38:55 +02:00
parent 1873480ca5
commit 137dbf3cf7
2 changed files with 168 additions and 15 deletions
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13
passes/opt/opt.cc
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@ -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);