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-rw-r--r--passes/cmds/bugpoint.cc76
1 files changed, 48 insertions, 28 deletions
diff --git a/passes/cmds/bugpoint.cc b/passes/cmds/bugpoint.cc
index a75927393..00aac596f 100644
--- a/passes/cmds/bugpoint.cc
+++ b/passes/cmds/bugpoint.cc
@@ -30,23 +30,21 @@ struct BugpointPass : public Pass {
{
// |---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|
log("\n");
- log(" bugpoint [options]\n");
+ log(" bugpoint [options] -script <filename>\n");
log("\n");
- log("This command minimizes testcases that crash Yosys. It removes an arbitrary part\n");
- log("of the design and recursively invokes Yosys with a given script, repeating these\n");
- log("steps while it can find a smaller design that still causes a crash. Once this\n");
- log("command finishes, it replaces the current design with the smallest testcase it\n");
- log("was able to produce.\n");
+ log("This command minimizes the current design that is known to crash Yosys with the\n");
+ log("given script into a smaller testcase. It does this by removing an arbitrary part\n");
+ log("of the design and recursively invokes a new Yosys process with this modified design\n");
+ log("and the same script, repeating these steps while it can find a smaller design that\n");
+ log("still causes a crash. Once this command finishes, it replaces the current design\n");
+ log("with the smallest testcase it was able to produce.\n");
log("\n");
- log("It is possible to specify the kinds of design part that will be removed. If none\n");
- log("are specified, all parts of design will be removed.\n");
+ log(" -script <filename>\n");
+ log(" use this script to crash Yosys. required.\n");
log("\n");
log(" -yosys <filename>\n");
log(" use this Yosys binary. if not specified, `yosys` is used.\n");
log("\n");
- log(" -script <filename>\n");
- log(" use this script to crash Yosys. required.\n");
- log("\n");
log(" -grep <string>\n");
log(" only consider crashes that place this string in the log file.\n");
log("\n");
@@ -60,14 +58,21 @@ struct BugpointPass : public Pass {
log(" finishing. produces smaller and more useful testcases, but may fail to\n");
log(" produce any testcase at all if the crash is related to dangling wires.\n");
log("\n");
+ log("It is possible to constrain which parts of the design will be considered for\n");
+ log("removal. Unless one or more of the following options are specified, all parts\n");
+ log("will be considered.\n");
+ log("\n");
log(" -modules\n");
- log(" try to remove modules.\n");
+ log(" try to remove modules. modules with a (* bugpoint_keep *) attribute\n");
+ log(" will be skipped.\n");
log("\n");
log(" -ports\n");
- log(" try to remove module ports.\n");
+ log(" try to remove module ports. ports with a (* bugpoint_keep *) attribute\n");
+ log(" will be skipped (useful for clocks, resets, etc.)\n");
log("\n");
log(" -cells\n");
- log(" try to remove cells.\n");
+ log(" try to remove cells. cells with a (* bugpoint_keep *) attribute will\n");
+ log(" be skipped.\n");
log("\n");
log(" -connections\n");
log(" try to reconnect ports to 'x.\n");
@@ -139,9 +144,12 @@ struct BugpointPass : public Pass {
if (module->get_blackbox_attribute())
continue;
+ if (module->get_bool_attribute(ID::bugpoint_keep))
+ continue;
+
if (index++ == seed)
{
- log("Trying to remove module %s.\n", module->name.c_str());
+ log_header(design, "Trying to remove module %s.\n", log_id(module));
removed_module = module;
break;
}
@@ -160,18 +168,21 @@ struct BugpointPass : public Pass {
for (auto wire : mod->wires())
{
+ if (!wire->port_id)
+ continue;
+
if (!stage2 && wire->get_bool_attribute(ID($bugpoint)))
continue;
- if (wire->port_input || wire->port_output)
+ if (wire->get_bool_attribute(ID::bugpoint_keep))
+ continue;
+
+ if (index++ == seed)
{
- if (index++ == seed)
- {
- log("Trying to remove module port %s.\n", log_signal(wire));
- wire->port_input = wire->port_output = false;
- mod->fixup_ports();
- return design_copy;
- }
+ log_header(design, "Trying to remove module port %s.\n", log_id(wire));
+ wire->port_input = wire->port_output = false;
+ mod->fixup_ports();
+ return design_copy;
}
}
}
@@ -183,12 +194,16 @@ struct BugpointPass : public Pass {
if (mod->get_blackbox_attribute())
continue;
+
Cell *removed_cell = nullptr;
for (auto cell : mod->cells())
{
+ if (cell->get_bool_attribute(ID::bugpoint_keep))
+ continue;
+
if (index++ == seed)
{
- log("Trying to remove cell %s.%s.\n", mod->name.c_str(), cell->name.c_str());
+ log_header(design, "Trying to remove cell %s.%s.\n", log_id(mod), log_id(cell));
removed_cell = cell;
break;
}
@@ -219,7 +234,7 @@ struct BugpointPass : public Pass {
if (index++ == seed)
{
- log("Trying to remove cell port %s.%s.%s.\n", mod->name.c_str(), cell->name.c_str(), it.first.c_str());
+ log_header(design, "Trying to remove cell port %s.%s.%s.\n", log_id(mod), log_id(cell), log_id(it.first));
RTLIL::SigSpec port_x(State::Sx, port.size());
cell->unsetPort(it.first);
cell->setPort(it.first, port_x);
@@ -228,7 +243,7 @@ struct BugpointPass : public Pass {
if (!stage2 && (cell->input(it.first) || cell->output(it.first)) && index++ == seed)
{
- log("Trying to expose cell port %s.%s.%s as module port.\n", mod->name.c_str(), cell->name.c_str(), it.first.c_str());
+ log_header(design, "Trying to expose cell port %s.%s.%s as module port.\n", log_id(mod), log_id(cell), log_id(it.first));
RTLIL::Wire *wire = mod->addWire(NEW_ID, port.size());
wire->set_bool_attribute(ID($bugpoint));
wire->port_input = cell->input(it.first);
@@ -260,7 +275,7 @@ struct BugpointPass : public Pass {
{
if (index++ == seed)
{
- log("Trying to remove assign %s %s in %s.%s.\n", log_signal((*it).first), log_signal((*it).second), mod->name.c_str(), pr.first.c_str());
+ log_header(design, "Trying to remove assign %s %s in %s.%s.\n", log_signal(it->first), log_signal(it->second), log_id(mod), log_id(pr.first));
cs->actions.erase(it);
return design_copy;
}
@@ -286,7 +301,7 @@ struct BugpointPass : public Pass {
{
if (index++ == seed)
{
- log("Trying to remove sync %s update %s %s in %s.%s.\n", log_signal(sy->signal), log_signal((*it).first), log_signal((*it).second), mod->name.c_str(), pr.first.c_str());
+ log_header(design, "Trying to remove sync %s update %s %s in %s.%s.\n", log_signal(sy->signal), log_signal(it->first), log_signal(it->second), log_id(mod), log_id(pr.first));
sy->actions.erase(it);
return design_copy;
}
@@ -304,6 +319,9 @@ struct BugpointPass : public Pass {
bool fast = false, clean = false;
bool modules = false, ports = false, cells = false, connections = false, assigns = false, updates = false, has_part = false;
+ log_header(design, "Executing BUGPOINT pass (minimize testcases).\n");
+ log_push();
+
size_t argidx;
for (argidx = 1; argidx < args.size(); argidx++)
{
@@ -447,6 +465,8 @@ struct BugpointPass : public Pass {
design->add(module->clone());
delete crashing_design;
}
+
+ log_pop();
}
} BugpointPass;
generated by cgit v1.2.3 (git 2.25.1) at 2025-04-03 17:14:23 +0000