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//! Byte-neutral responsibility split of the former monolith impl; see the parent module.
use super::*;
impl LlModule {
pub(in crate::native) fn infer_raw_buffer_params(&mut self) {
for f in &self.functions {
let pointer_params: HashSet<String> = f
.params
.iter()
.filter_map(|(name, ty)| match ty {
LlType::Ptr(1..=3) => Some(name.clone()),
_ => None,
})
.collect();
if pointer_params.is_empty() {
continue;
}
let mut roots: HashMap<String, String> = pointer_params
.iter()
.map(|name| (name.clone(), name.clone()))
.collect();
let mut direct_root_aliases = pointer_params.clone();
let mut sources: HashMap<String, HashSet<LlType>> = HashMap::new();
let mut byte_gep_aliases: HashMap<String, String> = HashMap::new();
let mut selected_roots: HashMap<String, HashSet<String>> = HashMap::new();
let mut byte_gep_selected_aliases: HashMap<String, HashSet<String>> = HashMap::new();
let mut byte_reinterpret_roots: HashSet<String> = HashSet::new();
let mut memcpy_source_roots: HashMap<String, HashSet<u64>> = HashMap::new();
let mut memcpy_struct_copy_pairs: Vec<(String, String)> = Vec::new();
let mut vector_load_roots: HashMap<String, HashSet<LlType>> = HashMap::new();
let mut acceleration_structure_shadow_roots: HashSet<String> = HashSet::new();
let mut changed = true;
while changed {
changed = false;
for inst in f.carrier_insts() {
if let Some((res, base)) = &inst.identity_ptr_bitcast {
if let Some(root) = byte_gep_aliases.get(base).cloned() {
if byte_gep_aliases.insert(res.clone(), root).is_none() {
changed = true;
}
}
if let Some(roots) = byte_gep_selected_aliases.get(base).cloned() {
if byte_gep_selected_aliases.get(res) != Some(&roots) {
byte_gep_selected_aliases.insert(res.clone(), roots);
changed = true;
}
}
if let Some(root) = roots.get(base).cloned() {
let direct = direct_root_aliases.contains(base);
if direct && direct_root_aliases.insert(res.clone()) {
changed = true;
}
if roots.insert(res.clone(), root).is_none() {
changed = true;
}
}
if let Some(arm_roots) = selected_roots.get(base).cloned() {
if selected_roots.get(res) != Some(&arm_roots) {
selected_roots.insert(res.clone(), arm_roots);
changed = true;
}
}
continue;
}
if let Some(call) = &inst.alias_call {
if matches!(
call.callee.as_str(),
"air.get_instance_count_instance_acceleration_structure"
| "air.get_primitive_acceleration_structure_instance_acceleration_structure"
) {
if let Some(LlValue::Local(arg_name)) =
call.args.first().map(|arg| &arg.value)
{
if let Some(root) = roots.get(arg_name) {
acceleration_structure_shadow_roots.insert(root.clone());
}
}
}
if call.callee.starts_with("llvm.memcpy.")
&& call.args.len() == 4
&& matches!(call.args[3].value, LlValue::Bool(false))
{
let Some(len) = typed_value_u64(&call.args[2]) else {
continue;
};
if len == 0 {
continue;
}
let LlValue::Local(src) = &call.args[1].value else {
continue;
};
let LlValue::Local(dst) = &call.args[0].value else {
continue;
};
let Some(src_root) = roots.get(src).cloned() else {
continue;
};
let Some(dst_root) = roots.get(dst) else {
continue;
};
if self.root_has_struct_pointee(&f.name, dst_root) {
memcpy_struct_copy_pairs.push((dst_root.clone(), src_root.clone()));
memcpy_source_roots.entry(src_root).or_default().insert(len);
}
}
}
if let Some((object, ptr)) = &inst.store {
if let LlValue::Local(base) = &ptr.value {
if self.resolve_known_type(&object.ty) != LlType::Int(8) {
if let Some(root) = byte_gep_aliases.get(base).cloned() {
byte_reinterpret_roots.insert(root);
}
if let Some(roots) = byte_gep_selected_aliases.get(base).cloned() {
byte_reinterpret_roots.extend(roots);
}
}
}
}
let Some(res) = &inst.result else {
continue;
};
if let Some(load) = &inst.load {
let LlValue::Local(base) = &load.ptr.value else {
continue;
};
if let Some(root) = byte_gep_aliases.get(base).cloned() {
if self.resolve_known_type(&load.result_ty) != LlType::Int(8) {
byte_reinterpret_roots.insert(root);
}
}
if let Some(roots) = byte_gep_selected_aliases.get(base).cloned() {
if self.resolve_known_type(&load.result_ty) != LlType::Int(8) {
byte_reinterpret_roots.extend(roots);
}
}
if let Some(root) = roots.get(base).cloned() {
if let LlType::Vector(elem, lanes) =
self.resolve_known_type(&load.result_ty)
{
if lanes > 1 {
vector_load_roots.entry(root).or_default().insert(*elem);
}
}
}
if !direct_root_aliases.contains(base) {
continue;
}
let Some(root) = roots.get(base).cloned() else {
continue;
};
sources
.entry(root)
.or_default()
.insert(load.result_ty.clone());
continue;
}
if let Some(gep) = &inst.gep {
let LlValue::Local(base) = &gep.base.value else {
continue;
};
if let Some(arm_roots) = selected_roots.get(base).cloned() {
if self.resolve_known_type(&gep.source_ty) == LlType::Int(8) {
for root in &arm_roots {
sources
.entry(root.clone())
.or_default()
.insert(gep.source_ty.clone());
}
if byte_gep_selected_aliases.get(res) != Some(&arm_roots) {
byte_gep_selected_aliases.insert(res.clone(), arm_roots);
changed = true;
}
}
continue;
}
let Some(root) = roots.get(base).cloned() else {
continue;
};
sources
.entry(root.clone())
.or_default()
.insert(gep.source_ty.clone());
if self.resolve_known_type(&gep.source_ty) == LlType::Int(8)
&& byte_gep_aliases.insert(res.clone(), root.clone()).is_none()
{
changed = true;
}
if roots.insert(res.clone(), root).is_none() {
changed = true;
}
continue;
}
if let Some(incoming) = &inst.phi_incoming_values {
let mut root: Option<String> = None;
for value in incoming {
let LlValue::Local(name) = value else {
continue;
};
let Some(candidate) = roots.get(name).cloned() else {
continue;
};
match &root {
Some(existing) if existing != &candidate => {
root = None;
break;
}
None => root = Some(candidate),
_ => {}
}
}
if let Some(root) = root {
let res_name = res.clone();
if roots.insert(res_name.clone(), root.clone()).is_none() {
changed = true;
}
let all_byte_gep_aliases = incoming.iter().all(|value| match value {
LlValue::Local(name) => byte_gep_aliases
.get(name)
.is_some_and(|candidate| candidate == &root),
_ => false,
});
if all_byte_gep_aliases
&& byte_gep_aliases.get(&res_name) != Some(&root)
{
byte_gep_aliases.insert(res_name, root);
changed = true;
}
}
continue;
}
if let Some((true_value, false_value)) = &inst.select_arms {
if !matches!(true_value.ty, LlType::Ptr(_))
|| !matches!(false_value.ty, LlType::Ptr(_))
{
continue;
}
let (LlValue::Local(true_name), LlValue::Local(false_name)) =
(&true_value.value, &false_value.value)
else {
continue;
};
let mut arm_roots = HashSet::new();
if let Some(root) = roots.get(true_name) {
arm_roots.insert(root.clone());
}
if let Some(root) = roots.get(false_name) {
arm_roots.insert(root.clone());
}
if let Some(roots) = selected_roots.get(true_name) {
arm_roots.extend(roots.iter().cloned());
}
if let Some(roots) = selected_roots.get(false_name) {
arm_roots.extend(roots.iter().cloned());
}
if !arm_roots.is_empty() && selected_roots.get(res) != Some(&arm_roots) {
selected_roots.insert(res.clone(), arm_roots);
changed = true;
}
}
}
}
for param in byte_reinterpret_roots {
self.raw_buffer_params.insert((f.name.clone(), param));
}
for param in acceleration_structure_shadow_roots {
self.raw_buffer_params.insert((f.name.clone(), param));
}
let mut memcpy_raw_sources = HashSet::new();
for (param, lengths) in &memcpy_source_roots {
if self.memcpy_source_implies_raw_bytes(sources.get(param), lengths) {
memcpy_raw_sources.insert(param.clone());
self.raw_buffer_params
.insert((f.name.clone(), param.clone()));
}
}
for (dst, src) in memcpy_struct_copy_pairs {
if memcpy_raw_sources.contains(&src)
|| self.raw_buffer_params.contains(&(f.name.clone(), src))
{
self.raw_buffer_params.insert((f.name.clone(), dst));
}
}
for (param, elems) in &vector_load_roots {
if sources.get(param).is_some_and(|seen| {
elems.iter().any(|elem| {
seen.iter()
.any(|source| self.buffer_source_matches_vector_load_elem(source, elem))
})
}) {
self.raw_buffer_params
.insert((f.name.clone(), param.clone()));
}
}
for (param, seen) in sources {
let metadata_byte_buffer = self
.metadata_byte_buffer_params
.contains(&(f.name.clone(), param.clone()));
if metadata_byte_buffer
&& seen
.iter()
.any(|ty| self.is_struct_or_array_buffer_source(ty))
{
self.raw_buffer_params.insert((f.name.clone(), param));
continue;
}
let non_wrapper_sources = seen
.iter()
.filter(|ty| !self.is_zero_wrapper_type(ty))
.count();
if non_wrapper_sources > 1 || seen.iter().any(|ty| self.type_contains_pointer(ty)) {
self.raw_buffer_params.insert((f.name.clone(), param));
}
}
}
}
pub(in crate::native) fn memcpy_source_implies_raw_bytes(
&self,
seen: Option<&HashSet<LlType>>,
lengths: &HashSet<u64>,
) -> bool {
let Some(seen) = seen else {
return true;
};
let mut largest_scalar = 0;
for ty in seen.iter().filter(|ty| !self.is_zero_wrapper_type(ty)) {
match self.resolve_known_type(ty) {
LlType::Struct(_) | LlType::Array(_, _) => {
let Some((size, _align)) = self.type_storage_size_align(ty) else {
return false;
};
if lengths.iter().any(|len| *len >= size) {
return true;
}
}
_ => {
let Some(size) = self.scalar_storage_size(ty) else {
return false;
};
largest_scalar = largest_scalar.max(size);
}
}
}
lengths.iter().any(|len| *len > largest_scalar)
}
pub(in crate::native) fn buffer_source_matches_vector_load_elem(
&self,
source: &LlType,
elem: &LlType,
) -> bool {
let elem = self.resolve_known_type(elem);
match self.resolve_known_type(source) {
LlType::Vector(source_elem, lanes) if lanes > 1 => {
self.resolve_known_type(&source_elem) == elem
}
source => source == elem,
}
}
pub(in crate::native) fn root_has_struct_pointee(&self, func: &str, root: &str) -> bool {
self.ptr_pointees
.get(&(func.to_string(), root.to_string()))
.is_some_and(|ty| matches!(self.resolve_known_type(ty), LlType::Struct(_)))
}
pub(in crate::native) fn is_struct_or_array_buffer_source(&self, ty: &LlType) -> bool {
!self.is_zero_wrapper_type(ty)
&& matches!(
self.resolve_known_type(ty),
LlType::Struct(_) | LlType::Array(_, _)
)
}
// These four size/align methods delegate to the shared layout oracle (`crate::layout`,
// refactor S4). Each threads `resolve_known_type` (the module's named-type table) as the
// oracle's `resolve` closure — the only `&self` dependency the calculators ever had.
pub(in crate::native) fn scalar_storage_size(&self, ty: &LlType) -> Option<u64> {
crate::layout::scalar_storage_size(ty, &|t| self.resolve_known_type(t))
}
pub(in crate::native) fn type_storage_size_align(&self, ty: &LlType) -> Option<(u64, u64)> {
crate::layout::native_size_align(ty, &|t| self.resolve_known_type(t))
}
pub(in crate::native) fn native_memcpy_type_size_align(
&self,
ty: &LlType,
) -> Option<(u64, u64)> {
crate::layout::memcpy_size_align(ty, &|t| self.resolve_known_type(t))
}
pub(in crate::native) fn air_metadata_type_size_align(
&self,
ty: &AirType,
) -> Option<(u64, u64)> {
crate::layout::air_metadata_size_align(ty, &|t| self.resolve_known_type(t))
}
pub(in crate::native) fn propagate_raw_buffer_params(&mut self) {
// Raw byte addressing is a property of the buffer object, not of the particular function
// parameter currently naming it. Follow the call edge in BOTH directions so a byte-view root
// passed through a GEP/identity-bitcast reaches a helper, and a helper's byte-view requirement
// reaches its entry buffer. The latter is required for dynamic byte offsets after inlining:
// keeping the entry typed leaves an AccessChain rooted on a scalar raw byte. The interface then
// has one raw descriptor for that reflected Metal binding rather than a typed/raw alias pair.
// `raw_param_call_edges` admits only same-address-space aliases of one parameter, never a
// cross-buffer merge.
let call_edges = self.raw_param_call_edges();
let mut changed = true;
while changed {
changed = false;
let mut additions = vec![];
for edge in &call_edges {
let caller = (edge.caller_func.clone(), edge.caller_param.clone());
let callee = (edge.callee_func.clone(), edge.callee_param.clone());
if self.raw_buffer_params.contains(&caller)
&& !self.raw_buffer_params.contains(&callee)
{
additions.push(callee.clone());
}
if self.raw_buffer_params.contains(&callee)
&& !self.raw_buffer_params.contains(&caller)
{
additions.push(caller);
}
}
additions.sort();
additions.dedup();
for key in additions {
if self.raw_buffer_params.insert(key) {
changed = true;
}
}
}
}
/// Raw-buffer propagation needs the address-preserving alias of a caller parameter, not merely a
/// direct parameter operand. A helper often receives `%p + byte_offset` after the caller's
/// `getelementptr i8` / identity-bitcast chain; treating that argument as unrelated loses the raw
/// byte model precisely when helper inlining exposes its typed accesses at the raw root.
pub(in crate::native) fn raw_param_call_edges(&self) -> Vec<ParamCallEdge> {
let funcs: HashMap<String, &LlFunction> =
self.functions.iter().map(|f| (f.name.clone(), f)).collect();
let mut seen = HashSet::new();
let mut edges = Vec::new();
for f in &self.functions {
let aliases = pointer_param_alias_roots(f);
let param_types: HashMap<&str, &LlType> = f
.params
.iter()
.map(|(name, ty)| (name.as_str(), ty))
.collect();
for inst in f.carrier_insts() {
let Some(call) = &inst.alias_call else {
continue;
};
let Some(callee) = funcs.get(&call.callee) else {
continue;
};
for (arg, (callee_param, callee_ty)) in call.args.iter().zip(&callee.params) {
let LlValue::Local(arg_name) = &arg.value else {
continue;
};
let Some(caller_param) = aliases.get(arg_name) else {
continue;
};
let Some(caller_ty) = param_types.get(caller_param.as_str()) else {
continue;
};
let (LlType::Ptr(caller_as), LlType::Ptr(arg_as), LlType::Ptr(callee_as)) =
(caller_ty, &arg.ty, callee_ty)
else {
continue;
};
if caller_as != arg_as || arg_as != callee_as {
continue;
}
let edge = ParamCallEdge {
caller_func: f.name.clone(),
caller_param: caller_param.clone(),
callee_func: callee.name.clone(),
callee_param: callee_param.clone(),
};
if seen.insert(edge.clone()) {
edges.push(edge);
}
}
}
}
edges
}
pub(in crate::native) fn param_call_edges(&self) -> Vec<ParamCallEdge> {
let funcs: HashMap<String, &LlFunction> =
self.functions.iter().map(|f| (f.name.clone(), f)).collect();
let mut seen = HashSet::new();
let mut edges = Vec::new();
for f in &self.functions {
let caller_params = f
.params
.iter()
.map(|(param, _)| param.as_str())
.collect::<HashSet<_>>();
for inst in f.carrier_insts() {
let Some(call) = &inst.alias_call else {
continue;
};
let Some(callee) = funcs.get(&call.callee) else {
continue;
};
for (arg, (callee_param, _)) in call.args.iter().zip(&callee.params) {
let LlValue::Local(caller_param) = &arg.value else {
continue;
};
if !caller_params.contains(caller_param.as_str()) {
continue;
}
let edge = ParamCallEdge {
caller_func: f.name.clone(),
caller_param: caller_param.clone(),
callee_func: callee.name.clone(),
callee_param: callee_param.clone(),
};
if seen.insert(edge.clone()) {
edges.push(edge);
}
}
}
}
edges
}
pub(in crate::native) fn is_zero_wrapper_type(&self, ty: &LlType) -> bool {
match ty {
LlType::Named(name) => self
.types
.get(name)
.map(|ty| self.is_zero_wrapper_type(ty))
.unwrap_or(false),
LlType::Struct(fields) => {
matches!(fields.as_slice(), [LlType::Array(_, 0)])
}
_ => false,
}
}
pub(in crate::native) fn type_contains_pointer(&self, ty: &LlType) -> bool {
match ty {
LlType::Ptr(_) => true,
LlType::Named(name) => self
.types
.get(name)
.map(|ty| self.type_contains_pointer(ty))
.unwrap_or(false),
LlType::Vector(elem, _) | LlType::Array(elem, _) => self.type_contains_pointer(elem),
LlType::Struct(fields) => fields.iter().any(|field| self.type_contains_pointer(field)),
_ => false,
}
}
}