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fix: Fix inline_constant_functions pass #2135

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fix: Fix inline_constant_functions pass #2135

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15 changes: 11 additions & 4 deletions hugr-llvm/src/utils/inline_constant_functions.rs
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Original file line number Diff line number Diff line change
@@ -1,5 +1,5 @@
use hugr_core::{
hugr::hugrmut::HugrMut,
hugr::{hugrmut::HugrMut, internal::HugrMutInternals},
ops::{FuncDefn, LoadFunction, Value},
types::PolyFuncType,
HugrView, Node, NodeIndex as _,
Expand Down Expand Up @@ -51,7 +51,7 @@ fn inline_constant_functions_impl(hugr: &mut impl HugrMut) -> Result<bool> {

let mut any_changes = false;

for (konst_n, func_hugr, load_constant_ns) in const_funs {
for (konst_n, mut func_hugr, load_constant_ns) in const_funs {
if !load_constant_ns.is_empty() {
let polysignature: PolyFuncType = func_hugr
.inner_function_type()
Expand All @@ -65,11 +65,16 @@ fn inline_constant_functions_impl(hugr: &mut impl HugrMut) -> Result<bool> {
name: const_fn_name(konst_n),
signature: polysignature.clone(),
};
let func_node = hugr.add_node_with_parent(hugr.root(), func_defn);
hugr.insert_hugr(func_node, func_hugr);
func_hugr.replace_op(func_hugr.root(), func_defn).unwrap();
let func_node = hugr.insert_hugr(hugr.root(), func_hugr).new_root;
hugr.set_num_ports(func_node, 0, 1);

for lcn in load_constant_ns {
hugr.replace_op(lcn, LoadFunction::try_new(polysignature.clone(), [])?)?;

let src_port = hugr.node_outputs(func_node).next().unwrap();
let tgt_port = hugr.node_inputs(lcn).next().unwrap();
hugr.connect(func_node, src_port, lcn, tgt_port);
}
any_changes = true;
}
Expand Down Expand Up @@ -131,6 +136,7 @@ mod test {
};

inline_constant_functions(&mut hugr).unwrap();
hugr.validate().unwrap();

for n in hugr.nodes() {
if let Some(konst) = hugr.get_optype(n).as_const() {
Expand Down Expand Up @@ -180,6 +186,7 @@ mod test {
};

inline_constant_functions(&mut hugr).unwrap();
hugr.validate().unwrap();

for n in hugr.nodes() {
if let Some(konst) = hugr.get_optype(n).as_const() {
Expand Down
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