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Revert "Reapply "Add fanoutlimit""

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This reverts commit 7ebc3ed7d2.
This commit is contained in:
Akash Levy 2024-08-27 17:27:23 -07:00
parent 7ebc3ed7d2
commit a32e4dd8f8
3 changed files with 9 additions and 32 deletions
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21
passes/cmds/splitfanout.cc
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@ -67,7 +67,7 @@ struct SplitfanoutWorker
}
}
int split(Cell *cell, int fanoutlimit)
int split(Cell *cell)
{
// Get output signal/port
SigSpec outsig;
@ -93,8 +93,8 @@ struct SplitfanoutWorker
}
}
// Skip if output signal has only one user or too many users
if (GetSize(bit_users) <= 1 || GetSize(bit_users) > fanoutlimit)
// Skip if output signal has only one user
if (GetSize(bit_users) <= 1)
return 0;
// Iterate over bit users and create a new cell for each one
@ -148,7 +148,7 @@ struct SplitfanoutPass : public Pass {
{
// |---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|
log("\n");
log(" splitfanout [options] [selection]\n");
log(" splitfanout [selection]\n");
log("\n");
log("This command copies selected cells with >1 fanout into cells with fanout 1. It\n");
log("is effectively the opposite of the opt_merge pass.\n");
@ -156,23 +156,16 @@ struct SplitfanoutPass : public Pass {
log("This command operates only on cells with 1 output and no \"bit split\" on that\n");
log("output.\n");
log("\n");
log(" -fanoutlimit\n");
log(" fanout limit for splitfanout, beyond which no split (default: 10)\n");
log("\n");
}
void execute(std::vector<std::string> args, RTLIL::Design *design) override
{
int fanoutlimit = 10;
log_header(design, "Executing SPLITFANOUT pass (splitting up cells with >1 fanout into copies).\n");
size_t argidx;
for (argidx = 1; argidx < args.size(); argidx++)
{
if ((args[argidx] == "-fanoutlimit") && ((argidx + 1) < args.size())) {
fanoutlimit = std::stoi(args[++argidx]);
continue;
}
// No options currently. When adding in the future make sure to update docstring with [options]
break;
}
extra_args(args, argidx, design);
@ -185,7 +178,7 @@ struct SplitfanoutPass : public Pass {
SplitfanoutWorker worker(module);
bool did_something = false;
for (auto cell : module->selected_cells()) {
int n = worker.split(cell, fanoutlimit);
int n = worker.split(cell);
did_something |= (n != 0);
count_split_pre += (n != 0);
count_split_post += n;