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rtlil: Fix handling of connections on wire deletion

This commit is contained in:
Martin Povišer 2024-01-08 14:06:38 +01:00
parent 4585d60b8a
commit d6600fb1d5
2 changed files with 35 additions and 11 deletions
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45
kernel/rtlil.cc
View File

@ -2157,17 +2157,12 @@ void RTLIL::Module::remove(const pool<RTLIL::Wire*> &wires)
}
void operator()(RTLIL::SigSpec &lhs, RTLIL::SigSpec &rhs) {
log_assert(GetSize(lhs) == GetSize(rhs));
lhs.unpack();
rhs.unpack();
for (int i = 0; i < GetSize(lhs); i++) {
RTLIL::SigBit &lhs_bit = lhs.bits_[i];
RTLIL::SigBit &rhs_bit = rhs.bits_[i];
if ((lhs_bit.wire != nullptr && wires_p->count(lhs_bit.wire)) || (rhs_bit.wire != nullptr && wires_p->count(rhs_bit.wire))) {
lhs_bit = State::Sx;
rhs_bit = State::Sx;
}
}
// When a deleted wire occurs on the lhs we can just remove that part
// of the assignment
lhs.remove2(*wires_p, &rhs);
// Then replace all rhs occurrences with a dummy wire
(*this)(rhs);
}
};
@ -4238,6 +4233,34 @@ void RTLIL::SigSpec::remove2(const std::set<RTLIL::SigBit> &pattern, RTLIL::SigS
check();
}
void RTLIL::SigSpec::remove2(const pool<RTLIL::Wire*> &pattern, RTLIL::SigSpec *other)
{
if (other)
cover("kernel.rtlil.sigspec.remove_other");
else
cover("kernel.rtlil.sigspec.remove");
unpack();
if (other != NULL) {
log_assert(width_ == other->width_);
other->unpack();
}
for (int i = GetSize(bits_) - 1; i >= 0; i--) {
if (bits_[i].wire != NULL && pattern.count(bits_[i].wire)) {
bits_.erase(bits_.begin() + i);
width_--;
if (other != NULL) {
other->bits_.erase(other->bits_.begin() + i);
other->width_--;
}
}
}
check();
}
RTLIL::SigSpec RTLIL::SigSpec::extract(const RTLIL::SigSpec &pattern, const RTLIL::SigSpec *other) const
{
if (other)

1
kernel/rtlil.h
View File

@ -924,6 +924,7 @@ public:
void remove(const pool<RTLIL::SigBit> &pattern, RTLIL::SigSpec *other) const;
void remove2(const pool<RTLIL::SigBit> &pattern, RTLIL::SigSpec *other);
void remove2(const std::set<RTLIL::SigBit> &pattern, RTLIL::SigSpec *other);
void remove2(const pool<RTLIL::Wire*> &pattern, RTLIL::SigSpec *other);
void remove(int offset, int length = 1);
void remove_const();