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Merge pull request #5209 from povik/hieropt

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Start `opt_hier` to enable hierarchical optimization
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Martin Povišer 2025-07-17 14:12:18 +02:00 • committed by GitHub
commit 9ab1946799
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GPG key ID: B5690EEEBB952194
11 changed files with 583 additions and 6 deletions
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26
techlibs/common/synth.cc
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@ -47,6 +47,11 @@ struct SynthPass : public ScriptPass {
log(" flatten the design before synthesis. this will pass '-auto-top' to\n");
log(" 'hierarchy' if no top module is specified.\n");
log("\n");
log(" -hieropt\n");
log(" enable hierarchical optimization. this option is useful when `-flatten'\n");
log(" is not used, or when selected modules are marked with 'keep_hierarchy'\n.");
log(" to prevent their dissolution.\n");
log("\n");
log(" -encfile <file>\n");
log(" passed to 'fsm_recode' via 'fsm'\n");
log("\n");
@ -99,7 +104,7 @@ struct SynthPass : public ScriptPass {
}
string top_module, fsm_opts, memory_opts, abc;
bool autotop, flatten, noalumacc, nofsm, noabc, noshare, flowmap, booth;
bool autotop, flatten, noalumacc, nofsm, noabc, noshare, flowmap, booth, hieropt;
int lut;
std::vector<std::string> techmap_maps;
@ -118,6 +123,7 @@ struct SynthPass : public ScriptPass {
noshare = false;
flowmap = false;
booth = false;
hieropt = false;
abc = "abc";
techmap_maps.clear();
}
@ -201,6 +207,10 @@ struct SynthPass : public ScriptPass {
techmap_maps.push_back(args[++argidx]);
continue;
}
if (args[argidx] == "-hieropt") {
hieropt = true;
continue;
}
break;
}
extra_args(args, argidx, design);
@ -223,6 +233,12 @@ struct SynthPass : public ScriptPass {
void script() override
{
std::string hieropt_flag;
if (help_mode)
hieropt_flag = " [-hier]";
else
hieropt_flag = hieropt ? " -hier" : "";
if (check_label("begin")) {
if (help_mode) {
run("hierarchy -check [-top <top> | -auto-top]");
@ -247,7 +263,7 @@ struct SynthPass : public ScriptPass {
run("opt -nodffe -nosdff");
if (!nofsm || help_mode)
run("fsm" + fsm_opts, " (unless -nofsm)");
run("opt");
run("opt" + hieropt_flag);
run("wreduce");
run("peepopt");
run("opt_clean");
@ -261,13 +277,13 @@ struct SynthPass : public ScriptPass {
run("alumacc", " (unless -noalumacc)");
if (!noshare)
run("share", " (unless -noshare)");
run("opt");
run("opt" + hieropt_flag);
run("memory -nomap" + memory_opts);
run("opt_clean");
}
if (check_label("fine")) {
run("opt -fast -full");
run("opt -fast -full" + hieropt_flag);
run("memory_map");
run("opt -full");
if (help_mode) {
@ -291,7 +307,7 @@ struct SynthPass : public ScriptPass {
} else if (flowmap) {
run(stringf("flowmap -maxlut %d", lut));
}
run("opt -fast");
run("opt -fast" + hieropt_flag);
if ((!noabc && !flowmap) || help_mode) {
#ifdef YOSYS_ENABLE_ABC