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llvm: unify lowering via Resolver and Cursor; remove non-sealed PHI wiring; apply Resolver to extern/call/boxcall/arrays/maps/mem; add llvmlite harness docs; add LLVM layer overview; add LoopForm preheader

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Selfhosting Dev
2025-09-12 20:40:48 +09:00
parent d5af6b1d48
commit 38aea59fc1
20 changed files with 986 additions and 79 deletions
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28
src/backend/llvm/compiler/codegen/instructions/flow.rs
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@ -22,18 +22,28 @@ pub(in super::super) fn emit_return<'ctx, 'b>(
Ok(())
}
(_t, Some(vid)) => {
let v = *vmap.get(vid).ok_or("ret value missing")?;
// If function expects a pointer but we have an integer handle, convert i64 -> ptr
// Resolve return value according to expected type
let expected = map_mirtype_to_basic(codegen.context, &func.signature.return_type);
use inkwell::types::BasicTypeEnum as BT;
let v_adj = match (expected, v) {
(BT::PointerType(pt), BasicValueEnum::IntValue(iv)) => {
cursor.emit_instr(_bid, |b| b
.build_int_to_ptr(iv, pt, "ret_i2p"))
.map_err(|e| e.to_string())?
.into()
let v_adj = match expected {
BT::IntType(_it) => {
// For now, fallback to vmap; resolver threading requires signature change
*vmap.get(vid).ok_or("ret value missing")?
}
_ => v,
BT::PointerType(pt) => {
if let Some(BasicValueEnum::IntValue(iv)) = vmap.get(vid).copied() {
cursor
.emit_instr(_bid, |b| b.build_int_to_ptr(iv, pt, "ret_i2p"))
.map_err(|e| e.to_string())?
.into()
} else {
*vmap.get(vid).ok_or("ret value missing")?
}
}
BT::FloatType(_ft) => {
*vmap.get(vid).ok_or("ret value missing")?
}
_ => *vmap.get(vid).ok_or("ret value missing")?,
};
cursor.emit_term(_bid, |b| {
b.build_return(Some(&v_adj)).map_err(|e| e.to_string()).unwrap();