adding packed structs

Cargo.lock

@@ -2,6 +2,18 @@
 # It is not intended for manual editing.
 version = 3
 
+[[package]]
+name = "ahash"
+version = "0.8.11"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e89da841a80418a9b391ebaea17f5c112ffaaa96f621d2c285b5174da76b9011"
+dependencies = [
+ "cfg-if",
+ "once_cell",
+ "version_check",
+ "zerocopy",
+]
+
 [[package]]
 name = "aho-corasick"
 version = "1.1.3"
@@ -60,6 +72,12 @@ dependencies = [
  "windows-sys",
 ]
 
+[[package]]
+name = "cfg-if"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
+
 [[package]]
 name = "colorchoice"
 version = "1.0.2"
@@ -94,6 +112,9 @@ name = "hashbrown"
 version = "0.14.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e5274423e17b7c9fc20b6e7e208532f9b19825d82dfd615708b70edd83df41f1"
+dependencies = [
+ "ahash",
+]
 
 [[package]]
 name = "hbbytecode"
@@ -167,10 +188,35 @@ dependencies = [
  "libc",
 ]
 
+[[package]]
+name = "once_cell"
+version = "1.19.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3fdb12b2476b595f9358c5161aa467c2438859caa136dec86c26fdd2efe17b92"
+
+[[package]]
+name = "proc-macro2"
+version = "1.0.86"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5e719e8df665df0d1c8fbfd238015744736151d4445ec0836b8e628aae103b77"
+dependencies = [
+ "unicode-ident",
+]
+
+[[package]]
+name = "quote"
+version = "1.0.37"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b5b9d34b8991d19d98081b46eacdd8eb58c6f2b201139f7c5f643cc155a633af"
+dependencies = [
+ "proc-macro2",
+]
+
 [[package]]
 name = "regalloc2"
 version = "0.10.2"
-source = "git+https://github.com/jakubDoka/regalloc2?branch=reuse-allocations#c1c7614b3a06d38113feaac11b4e4c9ab9e8f0c8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "12908dbeb234370af84d0579b9f68258a0f67e201412dd9a2814e6f45b2fc0f0"
 dependencies = [
  "hashbrown",
  "log",
@@ -226,12 +272,35 @@ version = "1.13.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "3c5e1a9a646d36c3599cd173a41282daf47c44583ad367b8e6837255952e5c67"
 
+[[package]]
+name = "syn"
+version = "2.0.77"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9f35bcdf61fd8e7be6caf75f429fdca8beb3ed76584befb503b1569faee373ed"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "unicode-ident",
+]
+
+[[package]]
+name = "unicode-ident"
+version = "1.0.13"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e91b56cd4cadaeb79bbf1a5645f6b4f8dc5bde8834ad5894a8db35fda9efa1fe"
+
 [[package]]
 name = "utf8parse"
 version = "0.2.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "06abde3611657adf66d383f00b093d7faecc7fa57071cce2578660c9f1010821"
 
+[[package]]
+name = "version_check"
+version = "0.9.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0b928f33d975fc6ad9f86c8f283853ad26bdd5b10b7f1542aa2fa15e2289105a"
+
 [[package]]
 name = "windows-sys"
 version = "0.52.0"
@@ -308,3 +377,23 @@ checksum = "589f6da84c646204747d1270a2a5661ea66ed1cced2631d546fdfb155959f9ec"
 [[package]]
 name = "xtask"
 version = "0.1.0"
+
+[[package]]
+name = "zerocopy"
+version = "0.7.35"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1b9b4fd18abc82b8136838da5d50bae7bdea537c574d8dc1a34ed098d6c166f0"
+dependencies = [
+ "zerocopy-derive",
+]
+
+[[package]]
+name = "zerocopy-derive"
+version = "0.7.35"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fa4f8080344d4671fb4e831a13ad1e68092748387dfc4f55e356242fae12ce3e"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]

Cargo.toml

@@ -3,7 +3,6 @@ resolver = "2"
 members = ["hbbytecode", "hbvm", "hbxrt", "xtask", "hblang", "hbjit"]
 
 [profile.release]
-strip = true
 lto = true
 codegen-units = 1
 panic = "abort"

hblang/Cargo.toml

@@ -10,7 +10,8 @@ path = "src/main.rs"
 [dependencies]
 hbbytecode = { version = "0.1.0", path = "../hbbytecode" }
 hbvm = { path = "../hbvm", features = ["nightly"] }
-regalloc2 = { git = "https://github.com/jakubDoka/regalloc2", branch = "reuse-allocations", features = ["trace-log"] }
+regalloc2 = "0.10.2"
+#regalloc2 = { path = "../../regalloc2/" }#git = "https://github.com/jakubDoka/regalloc2", branch = "reuse-allocations", features = [] }
 
 [dev-dependencies]
 env_logger = "0.11.5"

hblang/README.md

@@ -162,6 +162,10 @@ Ty2 := struct {
 }
 
 main := fn(): int {
+	if @sizeof(packed struct {a: u8, b: u16}) != 3 {
+		return 9001
+	}
+
 	finst := Ty2.{ty: Ty.{a: 4, b: 1}, c: 3}
 	inst := odher_pass(finst)
 	if inst.c == 3 {
@@ -505,11 +509,223 @@ main := fn(): int {
 		}
 	}
 
-	//width += 1
+	width += 1
 
 	loop {
-		if width < y break
+		if x < height {
-		y += 1
+			//t += set_pixel(x, y, height)
+			x += 1
+			i += 1
+		} else {
+			x = 0
+			y += 1
+			if set_pixel(x, y, height) != i return 0
+			if y == width break
+		}
+	}
+
+	width += 1
+
+	loop {
+		if x < height {
+			//t += set_pixel(x, y, height)
+			x += 1
+			i += 1
+		} else {
+			x = 0
+			y += 1
+			if set_pixel(x, y, height) != i return 0
+			if y == width break
+		}
+	}
+
+	width += 1
+
+	loop {
+		if x < height {
+			//t += set_pixel(x, y, height)
+			x += 1
+			i += 1
+		} else {
+			x = 0
+			y += 1
+			if set_pixel(x, y, height) != i return 0
+			if y == width break
+		}
+	}
+
+	loop {
+		if x < height {
+			//t += set_pixel(x, y, height)
+			x += 1
+			i += 1
+		} else {
+			x = 0
+			y += 1
+			if set_pixel(x, y, height) != i return 0
+			if y == width break
+		}
+	}
+
+	width += 1
+
+	loop {
+		if x < height {
+			//t += set_pixel(x, y, height)
+			x += 1
+			i += 1
+		} else {
+			x = 0
+			y += 1
+			if set_pixel(x, y, height) != i return 0
+			if y == width break
+		}
+	}
+
+	width += 1
+
+	loop {
+		if x < height {
+			//t += set_pixel(x, y, height)
+			x += 1
+			i += 1
+		} else {
+			x = 0
+			y += 1
+			if set_pixel(x, y, height) != i return 0
+			if y == width break
+		}
+	}
+
+	width += 1
+
+	loop {
+		if x < height {
+			//t += set_pixel(x, y, height)
+			x += 1
+			i += 1
+		} else {
+			x = 0
+			y += 1
+			if set_pixel(x, y, height) != i return 0
+			if y == width break
+		}
+	}
+
+	loop {
+		if x < height {
+			//t += set_pixel(x, y, height)
+			x += 1
+			i += 1
+		} else {
+			x = 0
+			y += 1
+			if set_pixel(x, y, height) != i return 0
+			if y == width break
+		}
+	}
+
+	width += 1
+
+	loop {
+		if x < height {
+			//t += set_pixel(x, y, height)
+			x += 1
+			i += 1
+		} else {
+			x = 0
+			y += 1
+			if set_pixel(x, y, height) != i return 0
+			if y == width break
+		}
+	}
+
+	width += 1
+
+	loop {
+		if x < height {
+			//t += set_pixel(x, y, height)
+			x += 1
+			i += 1
+		} else {
+			x = 0
+			y += 1
+			if set_pixel(x, y, height) != i return 0
+			if y == width break
+		}
+	}
+
+	width += 1
+
+	loop {
+		if x < height {
+			//t += set_pixel(x, y, height)
+			x += 1
+			i += 1
+		} else {
+			x = 0
+			y += 1
+			if set_pixel(x, y, height) != i return 0
+			if y == width break
+		}
+	}
+
+	loop {
+		if x < height {
+			//t += set_pixel(x, y, height)
+			x += 1
+			i += 1
+		} else {
+			x = 0
+			y += 1
+			if set_pixel(x, y, height) != i return 0
+			if y == width break
+		}
+	}
+
+	width += 1
+
+	loop {
+		if x < height {
+			//t += set_pixel(x, y, height)
+			x += 1
+			i += 1
+		} else {
+			x = 0
+			y += 1
+			if set_pixel(x, y, height) != i return 0
+			if y == width break
+		}
+	}
+
+	width += 1
+
+	loop {
+		if x < height {
+			//t += set_pixel(x, y, height)
+			x += 1
+			i += 1
+		} else {
+			x = 0
+			y += 1
+			if set_pixel(x, y, height) != i return 0
+			if y == width break
+		}
+	}
+
+	width += 1
+
+	loop {
+		if x < height {
+			//t += set_pixel(x, y, height)
+			x += 1
+			i += 1
+		} else {
+			x = 0
+			y += 1
+			if set_pixel(x, y, height) != i return 0
+			if y == width break
+		}
 	}
 
 	return i

hblang/src/codegen.rs

@@ -719,13 +719,17 @@ impl Codegen {
         self.expr_ctx(expr, Ctx::default())
     }
 
-    fn build_struct(&mut self, fields: &[CommentOr<StructField>]) -> ty::Struct {
+    fn build_struct(
+        &mut self,
+        explicit_alignment: Option<u32>,
+        fields: &[CommentOr<StructField>],
+    ) -> ty::Struct {
         let fields = fields
             .iter()
             .filter_map(CommentOr::or)
             .map(|sf| Field { name: sf.name.into(), ty: self.ty(&sf.ty) })
             .collect();
-        self.tys.structs.push(Struct { fields });
+        self.tys.structs.push(Struct { fields, explicit_alignment });
         self.tys.structs.len() as u32 - 1
     }
 
@@ -733,9 +737,11 @@ impl Codegen {
         use {Expr as E, TokenKind as T};
         let value = match *expr {
             E::Mod { id, .. } => Some(Value::ty(ty::Kind::Module(id).compress())),
-            E::Struct { fields, captured, .. } => {
+            E::Struct { fields, captured, packed, .. } => {
                 if captured.is_empty() {
-                    Some(Value::ty(ty::Kind::Struct(self.build_struct(fields)).compress()))
+                    Some(Value::ty(
+                        ty::Kind::Struct(self.build_struct(packed.then_some(1), fields)).compress(),
+                    ))
                 } else {
                     let values = captured
                         .iter()
@@ -1940,7 +1946,12 @@ impl Codegen {
                 .unwrap_or_else(|| Loc::stack(self.ci.stack.allocate(self.tys.size_of(ty))));
             let mut offset = 0;
             for &Field { ty, .. } in self.tys.structs[stuct as usize].fields.clone().iter() {
-                offset = Types::align_up(offset, self.tys.align_of(ty));
+                offset = Types::align_up(
+                    offset,
+                    self.tys.structs[stuct as usize]
+                        .explicit_alignment
+                        .unwrap_or(self.tys.align_of(ty)),
+                );
                 let size = self.tys.size_of(ty);
                 let ctx = Ctx::from(Value { ty, loc: loc.as_ref().offset(offset) });
                 let left = left.as_ref().offset(offset);
@@ -2329,7 +2340,8 @@ impl Codegen {
         match *trap {
             trap::Trap::MakeStruct(trap::MakeStruct { file, struct_expr }) => {
                 let cfile = self.files[file as usize].clone();
-                let &Expr::Struct { fields, captured, .. } = struct_expr.get(&cfile).unwrap()
+                let &Expr::Struct { fields, captured, packed, .. } =
+                    struct_expr.get(&cfile).unwrap()
                 else {
                     unreachable!()
                 };
@@ -2350,7 +2362,8 @@ impl Codegen {
                     });
                 }
 
-                let stru = ty::Kind::Struct(self.build_struct(fields)).compress();
+                let stru =
+                    ty::Kind::Struct(self.build_struct(packed.then_some(1), fields)).compress();
                 self.ci.vars.truncate(prev_len);
                 self.ct.vm.write_reg(1, stru.repr() as u64);
                 debug_assert_ne!(stru.expand().inner(), 1);
@@ -2443,8 +2456,8 @@ impl Codegen {
             Expr::BinOp {
                 left: &Expr::Ident { .. },
                 op: TokenKind::Decl,
-                right: Expr::Struct { fields, .. },
+                right: Expr::Struct { fields, packed, .. },
-            } => ty::Kind::Struct(self.build_struct(fields)),
+            } => ty::Kind::Struct(self.build_struct(packed.then_some(1), fields)),
             Expr::BinOp { left, op: TokenKind::Decl, right } => {
                 let gid = self.tys.globals.len() as ty::Global;
                 self.tys.globals.push(Global { file, name: ident, ..Default::default() });

hblang/src/lexer.rs

@@ -129,6 +129,7 @@ pub enum TokenKind {
     Continue,
     Fn,
     Struct,
+    Packed,
     True,
     False,
     Idk,
@@ -314,6 +315,7 @@ gen_token_kind! {
         Continue  = b"continue",
         Fn        = b"fn",
         Struct    = b"struct",
+        Packed    = b"packed",
         True      = b"true",
         False     = b"false",
         Idk = b"idk",

hblang/src/lib.rs

@@ -582,6 +582,7 @@ struct Field {
 }
 
 struct Struct {
+    explicit_alignment: Option<u32>,
     fields: Rc<[Field]>,
 }
 
@@ -762,7 +763,7 @@ impl Types {
         let until = record.fields.iter().position(|f| f.name.as_ref() == field)?;
         let mut offset = 0;
         for &Field { ty, .. } in &record.fields[..until] {
-            offset = Self::align_up(offset, self.align_of(ty));
+            offset = Self::align_up(offset, record.explicit_alignment.unwrap_or(self.align_of(ty)));
             offset += self.size_of(ty);
         }
         Some((offset, record.fields[until].ty))
@@ -833,7 +834,7 @@ impl Types {
                 let mut offset = 0u32;
                 let record = &self.structs[stru as usize];
                 for &Field { ty, .. } in record.fields.iter() {
-                    let align = self.align_of(ty);
+                    let align = record.explicit_alignment.unwrap_or(self.align_of(ty));
                     offset = Self::align_up(offset, align);
                     offset += self.size_of(ty);
                 }
@@ -845,12 +846,16 @@ impl Types {
 
     fn align_of(&self, ty: ty::Id) -> Size {
         match ty.expand() {
-            ty::Kind::Struct(stru) => self.structs[stru as usize]
+            ty::Kind::Struct(stru) => {
-                .fields
+                self.structs[stru as usize].explicit_alignment.unwrap_or_else(|| {
-                .iter()
+                    self.structs[stru as usize]
-                .map(|&Field { ty, .. }| self.align_of(ty))
+                        .fields
-                .max()
+                        .iter()
-                .unwrap(),
+                        .map(|&Field { ty, .. }| self.align_of(ty))
+                        .max()
+                        .unwrap()
+                })
+            }
             ty::Kind::Slice(arr) => {
                 let arr = &self.arrays[arr as usize];
                 match arr.len {

hblang/src/parser.rs

@@ -64,6 +64,7 @@ pub struct Parser<'a, 'b> {
     symbols: &'b mut Symbols,
     ns_bound: usize,
     trailing_sep: bool,
+    packed: bool,
     idents: Vec<ScopeIdent>,
     captured: Vec<Ident>,
 }
@@ -80,6 +81,7 @@ impl<'a, 'b> Parser<'a, 'b> {
             symbols,
             ns_bound: 0,
             trailing_sep: false,
+            packed: false,
             idents: Vec::new(),
             captured: Vec::new(),
         }
@@ -286,7 +288,20 @@ impl<'a, 'b> Parser<'a, 'b> {
             T::False => E::Bool { pos, value: false },
             T::Idk => E::Idk { pos },
             T::DQuote => E::String { pos, literal: self.move_str(token) },
+            T::Packed => {
+                self.packed = true;
+                let expr = self.unit_expr();
+                if self.packed {
+                    self.report(
+                        expr.pos(),
+                        "this can not be packed \
+                        (unlike your mom that gets packed every day by me)",
+                    );
+                }
+                expr
+            }
             T::Struct => E::Struct {
+                packed: std::mem::take(&mut self.packed),
                 fields: {
                     self.ns_bound = self.idents.len();
                     self.expect_advance(T::LBrace);
@@ -746,6 +761,7 @@ generate_expr! {
             fields:   &'a [CommentOr<'a, StructField<'a>>],
             captured: &'a [Ident],
             trailing_comma: bool,
+            packed: bool,
         },
         /// `[Expr] LIST('.{', ',', '}', Ident [':' Expr])`
         Ctor {
@@ -1032,7 +1048,11 @@ impl<'a> fmt::Display for Expr<'a> {
                 write!(f, "@{name}(")?;
                 fmt_list(f, false, ")", ",", args, fmt::Display::fmt)
             }
-            Self::Struct { fields, trailing_comma, .. } => {
+            Self::Struct { fields, trailing_comma, packed, .. } => {
+                if packed {
+                    write!(f, "packed ")?;
+                }
+
                 write!(f, "struct {{")?;
                 fmt_list_low(f, trailing_comma, "}", ",", fields, |field, f| {
                     match field {

hblang/src/son.rs

@@ -2,7 +2,7 @@
 use {
     crate::{
         ident::{self, Ident},
-        instrs::{self},
+        instrs,
         lexer::{self, TokenKind},
         log,
         parser::{
@@ -12,7 +12,7 @@ use {
         },
         task,
         ty::{self},
-        Field, Func, HashMap, Offset, Reloc, Sig, Size, Struct, SymKey, TypedReloc, Types,
+        Field, Func, Offset, Reloc, Sig, Size, Struct, SymKey, TypedReloc, Types,
     },
     core::fmt,
     regalloc2::VReg,
@@ -1251,13 +1251,17 @@ impl Codegen {
         self.expr_ctx(expr, Ctx::default())
     }
 
-    fn build_struct(&mut self, fields: &[CommentOr<StructField>]) -> ty::Struct {
+    fn build_struct(
+        &mut self,
+        explicit_alignment: Option<u32>,
+        fields: &[CommentOr<StructField>],
+    ) -> ty::Struct {
         let fields = fields
             .iter()
             .filter_map(CommentOr::or)
             .map(|sf| Field { name: sf.name.into(), ty: self.ty(&sf.ty) })
             .collect();
-        self.tys.structs.push(Struct { fields });
+        self.tys.structs.push(Struct { fields, explicit_alignment });
         self.tys.structs.len() as u32 - 1
     }
 
@@ -1315,7 +1319,7 @@ impl Codegen {
                 let inps = [VOID, lhs, rhs];
                 Some(self.ci.nodes.new_node(ty::bin_ret(ty, op), Kind::BinOp { op }, inps))
             }
-            Expr::UnOp { pos, op: TokenKind::Band, val } => {
+            Expr::UnOp { pos: _, op: TokenKind::Band, val: _ } => {
                 todo!()
             }
             Expr::UnOp { pos, op, val } => {
@@ -1466,6 +1470,11 @@ impl Codegen {
                                 self.ci.nodes.modify_input(scope_var.value, 2, loop_var.value);
                             self.ci.nodes.lock(scope_var.value);
                         } else {
+                            if dest_var.value == scope_var.value {
+                                self.ci.nodes.unlock(dest_var.value);
+                                dest_var.value = VOID;
+                                self.ci.nodes.lock(dest_var.value);
+                            }
                             let phi = &self.ci.nodes[scope_var.value];
                             debug_assert_eq!(phi.kind, Kind::Phi);
                             debug_assert_eq!(phi.inputs[2], VOID);
@@ -1482,6 +1491,11 @@ impl Codegen {
                         self.ci.nodes.lock(dest_var.value);
                     }
 
+                    debug_assert!(
+                        self.ci.nodes[dest_var.value].kind != Kind::Phi
+                            || self.ci.nodes[dest_var.value].inputs[2] != 0
+                    );
+
                     self.ci.nodes.unlock_remove(scope_var.value);
                 }
 
@@ -1748,7 +1762,7 @@ impl Codegen {
                 self.ci.emit(instrs::st(reg::RET_ADDR, reg::STACK_PTR, 0, 0));
             }
 
-            self.ci.nodes.basic_blocks();
+            //self.ci.nodes.basic_blocks();
             //self.ci.nodes.graphviz();
 
             self.ci.vars = orig_vars;
@@ -1799,15 +1813,14 @@ impl Codegen {
         let mut nodes = std::mem::take(&mut self.ci.nodes);
 
         let func = Function::new(&mut nodes, &self.tys, sig);
-        dbg!(&func);
         let mut env = regalloc2::MachineEnv {
             preferred_regs_by_class: [
-                (1..12).map(|i| regalloc2::PReg::new(i, regalloc2::RegClass::Int)).collect(),
+                (1..5).map(|i| regalloc2::PReg::new(i, regalloc2::RegClass::Int)).collect(),
                 vec![],
                 vec![],
             ],
             non_preferred_regs_by_class: [
-                (12..64).map(|i| regalloc2::PReg::new(i, regalloc2::RegClass::Int)).collect(),
+                (12..16).map(|i| regalloc2::PReg::new(i, regalloc2::RegClass::Int)).collect(),
                 vec![],
                 vec![],
             ],
@@ -1817,131 +1830,131 @@ impl Codegen {
         if self.ci.call_count != 0 {
             std::mem::swap(&mut env.preferred_regs_by_class, &mut env.non_preferred_regs_by_class);
         };
-        let options = regalloc2::RegallocOptions { verbose_log: false, validate_ssa: true };
+        let options = regalloc2::RegallocOptions { verbose_log: false, validate_ssa: false };
-        let iters = std::time::SystemTime::now()
+        let iters = std::hint::black_box(10000);
-            .duration_since(std::time::SystemTime::UNIX_EPOCH)
+
-            .unwrap()
+        //let mut ctx = regalloc2::Ctx::default();
-            .as_nanos() as u32
+        //regalloc2::run_with_ctx(&func, &env, &options, &mut ctx)
-            % 300
+        //    .unwrap_or_else(|err| panic!("{err}"));
-            + 300;
+        //let now = std::time::Instant::now();
-        let mut output =
+        //for _ in 0..iters {
-            regalloc2::run(&func, &env, &options).unwrap_or_else(|err| panic!("{err}"));
+        //    regalloc2::run_with_ctx(&func, &env, &options, &mut ctx)
+        //        .unwrap_or_else(|err| panic!("{err}"));
+        //}
+        //eprintln!("took: {:?}", now.elapsed().checked_div(iters).unwrap());
+
         let now = std::time::Instant::now();
-        for i in 0..iters {
+        for _ in 0..iters {
-            output = regalloc2::run(&func, &env, &options).unwrap_or_else(|err| panic!("{err}"));
+            regalloc2::run(&func, &env, &options).unwrap_or_else(|err| panic!("{err}"));
-            if (iters + i) % 2 == 0 {
-                std::mem::swap(
-                    &mut env.preferred_regs_by_class,
-                    &mut env.non_preferred_regs_by_class,
-                );
-            }
         }
         eprintln!("took: {:?}", now.elapsed().checked_div(iters).unwrap());
 
-        let mut saved_regs = HashMap::<u8, u8>::default();
+        0
-        let mut atr = |allc: regalloc2::Allocation| {
-            debug_assert!(allc.is_reg());
-            let hvenc = regalloc2::PReg::from_index(allc.index()).hw_enc() as u8;
-            if hvenc <= 12 {
-                return hvenc;
-            }
-            let would_insert = saved_regs.len() as u8 + reg::RET_ADDR + 1;
-            *saved_regs.entry(hvenc).or_insert(would_insert)
-        };
 
-        for (i, block) in func.blocks.iter().enumerate() {
+        //let mut saved_regs = HashMap::<u8, u8>::default();
-            let blk = regalloc2::Block(i as _);
+        //let mut atr = |allc: regalloc2::Allocation| {
-            func.nodes[block.nid].offset = self.ci.code.len() as _;
+        //    debug_assert!(allc.is_reg());
-            for instr_or_edit in output.block_insts_and_edits(&func, blk) {
+        //    let hvenc = regalloc2::PReg::from_index(allc.index()).hw_enc() as u8;
-                let inst = match instr_or_edit {
+        //    if hvenc <= 12 {
-                    regalloc2::InstOrEdit::Inst(inst) => inst,
+        //        return hvenc;
-                    regalloc2::InstOrEdit::Edit(&regalloc2::Edit::Move { from, to }) => {
+        //    }
-                        self.ci.emit(instrs::cp(atr(to), atr(from)));
+        //    let would_insert = saved_regs.len() as u8 + reg::RET_ADDR + 1;
-                        continue;
+        //    *saved_regs.entry(hvenc).or_insert(would_insert)
-                    }
+        //};
-                };
 
-                let nid = func.instrs[inst.index()].nid;
+        //for (i, block) in func.blocks.iter().enumerate() {
-                if nid == NEVER {
+        //    let blk = regalloc2::Block(i as _);
-                    continue;
+        //    func.nodes[block.nid].offset = self.ci.code.len() as _;
-                };
+        //    for instr_or_edit in ctx.output.block_insts_and_edits(&func, blk) {
-                let allocs = output.inst_allocs(inst);
+        //        let inst = match instr_or_edit {
-                let node = &func.nodes[nid];
+        //            regalloc2::InstOrEdit::Inst(inst) => inst,
-                match node.kind {
+        //            regalloc2::InstOrEdit::Edit(&regalloc2::Edit::Move { from, to }) => {
-                    Kind::If => {
+        //                self.ci.emit(instrs::cp(atr(to), atr(from)));
-                        let &[_, cond] = node.inputs.as_slice() else { unreachable!() };
+        //                continue;
-                        if let Kind::BinOp { op } = func.nodes[cond].kind
+        //            }
-                            && let Some((op, swapped)) = op.cond_op(node.ty.is_signed())
+        //        };
-                        {
-                            let rel = Reloc::new(self.ci.code.len(), 3, 2);
-                            self.ci.jump_relocs.push((node.outputs[!swapped as usize], rel));
-                            let &[lhs, rhs] = allocs else { unreachable!() };
-                            self.ci.emit(op(atr(lhs), atr(rhs), 0));
-                        } else {
-                            todo!()
-                        }
-                    }
-                    Kind::Loop | Kind::Region => {
-                        if node.ralloc_backref as usize != i + 1 {
-                            let rel = Reloc::new(self.ci.code.len(), 1, 4);
-                            self.ci.jump_relocs.push((nid, rel));
-                            self.ci.emit(instrs::jmp(0));
-                        }
-                    }
-                    Kind::Return => {
-                        if i != func.blocks.len() - 1 {
-                            let rel = Reloc::new(self.ci.code.len(), 1, 4);
-                            self.ci.ret_relocs.push(rel);
-                            self.ci.emit(instrs::jmp(0));
-                        }
-                    }
-                    Kind::CInt { value } => {
-                        self.ci.emit(instrs::li64(atr(allocs[0]), value as _));
-                    }
-                    Kind::UnOp { op } => {
-                        let op = op.unop().expect("TODO: unary operator not supported");
-                        let &[dst, oper] = allocs else { unreachable!() };
-                        self.ci.emit(op(atr(dst), atr(oper)));
-                    }
-                    Kind::BinOp { op } => {
-                        let &[.., rhs] = node.inputs.as_slice() else { unreachable!() };
 
-                        if let Kind::CInt { value } = func.nodes[rhs].kind
+        //        let nid = func.instrs[inst.index()].nid;
-                            && let Some(op) =
+        //        if nid == NEVER {
-                                op.imm_binop(node.ty.is_signed(), func.tys.size_of(node.ty))
+        //            continue;
-                        {
+        //        };
-                            let &[dst, lhs] = allocs else { unreachable!() };
+        //        let allocs = ctx.output.inst_allocs(inst);
-                            self.ci.emit(op(atr(dst), atr(lhs), value as _));
+        //        let node = &func.nodes[nid];
-                        } else if let Some(op) =
+        //        match node.kind {
-                            op.binop(node.ty.is_signed(), func.tys.size_of(node.ty))
+        //            Kind::If => {
-                        {
+        //                let &[_, cond] = node.inputs.as_slice() else { unreachable!() };
-                            let &[dst, lhs, rhs] = allocs else { unreachable!() };
+        //                if let Kind::BinOp { op } = func.nodes[cond].kind
-                            self.ci.emit(op(atr(dst), atr(lhs), atr(rhs)));
+        //                    && let Some((op, swapped)) = op.cond_op(node.ty.is_signed())
-                        } else if op.cond_op(node.ty.is_signed()).is_some() {
+        //                {
-                        } else {
+        //                    let rel = Reloc::new(self.ci.code.len(), 3, 2);
-                            todo!()
+        //                    self.ci.jump_relocs.push((node.outputs[!swapped as usize], rel));
-                        }
+        //                    let &[lhs, rhs] = allocs else { unreachable!() };
-                    }
+        //                    self.ci.emit(op(atr(lhs), atr(rhs), 0));
-                    Kind::Call { func } => {
+        //                } else {
-                        self.ci.relocs.push(TypedReloc {
+        //                    todo!()
-                            target: ty::Kind::Func(func).compress(),
+        //                }
-                            reloc: Reloc::new(self.ci.code.len(), 3, 4),
+        //            }
-                        });
+        //            Kind::Loop | Kind::Region => {
-                        self.ci.emit(instrs::jal(reg::RET_ADDR, reg::ZERO, 0));
+        //                if node.ralloc_backref as usize != i + 1 {
-                    }
+        //                    let rel = Reloc::new(self.ci.code.len(), 1, 4);
-                    Kind::Start | Kind::End | Kind::Phi | Kind::Arg { .. } | Kind::Ctrl { .. } => {
+        //                    self.ci.jump_relocs.push((nid, rel));
-                        unreachable!()
+        //                    self.ci.emit(instrs::jmp(0));
-                    }
+        //                }
-                    Kind::Stck { .. } => todo!(),
+        //            }
-                    Kind::Load { .. } => todo!(),
+        //            Kind::Return => {
-                    Kind::Stre { .. } => todo!(),
+        //                if i != func.blocks.len() - 1 {
-                }
+        //                    let rel = Reloc::new(self.ci.code.len(), 1, 4);
-            }
+        //                    self.ci.ret_relocs.push(rel);
-        }
+        //                    self.ci.emit(instrs::jmp(0));
+        //                }
+        //            }
+        //            Kind::CInt { value } => {
+        //                self.ci.emit(instrs::li64(atr(allocs[0]), value as _));
+        //            }
+        //            Kind::UnOp { op } => {
+        //                let op = op.unop().expect("TODO: unary operator not supported");
+        //                let &[dst, oper] = allocs else { unreachable!() };
+        //                self.ci.emit(op(atr(dst), atr(oper)));
+        //            }
+        //            Kind::BinOp { op } => {
+        //                let &[.., rhs] = node.inputs.as_slice() else { unreachable!() };
 
-        self.ci.nodes = nodes;
+        //                if let Kind::CInt { value } = func.nodes[rhs].kind
+        //                    && let Some(op) =
+        //                        op.imm_binop(node.ty.is_signed(), func.tys.size_of(node.ty))
+        //                {
+        //                    let &[dst, lhs] = allocs else { unreachable!() };
+        //                    self.ci.emit(op(atr(dst), atr(lhs), value as _));
+        //                } else if let Some(op) =
+        //                    op.binop(node.ty.is_signed(), func.tys.size_of(node.ty))
+        //                {
+        //                    let &[dst, lhs, rhs] = allocs else { unreachable!() };
+        //                    self.ci.emit(op(atr(dst), atr(lhs), atr(rhs)));
+        //                } else if op.cond_op(node.ty.is_signed()).is_some() {
+        //                } else {
+        //                    todo!()
+        //                }
+        //            }
+        //            Kind::Call { func } => {
+        //                self.ci.relocs.push(TypedReloc {
+        //                    target: ty::Kind::Func(func).compress(),
+        //                    reloc: Reloc::new(self.ci.code.len(), 3, 4),
+        //                });
+        //                self.ci.emit(instrs::jal(reg::RET_ADDR, reg::ZERO, 0));
+        //            }
+        //            Kind::Start | Kind::End | Kind::Phi | Kind::Arg { .. } | Kind::Ctrl { .. } => {
+        //                unreachable!()
+        //            }
+        //            Kind::Stck { .. } => todo!(),
+        //            Kind::Load { .. } => todo!(),
+        //            Kind::Stre { .. } => todo!(),
+        //        }
+        //    }
+        //}
 
-        saved_regs.len()
+        //self.ci.nodes = nodes;
+
+        //saved_regs.len()
     }
 
     // TODO: sometimes its better to do this in bulk
@@ -2042,7 +2055,7 @@ impl Codegen {
                 left: &Expr::Ident { .. },
                 op: TokenKind::Decl,
                 right: Expr::Struct { fields, .. },
-            } => ty::Kind::Struct(self.build_struct(fields)),
+            } => ty::Kind::Struct(self.build_struct(None, fields)),
             Expr::BinOp { .. } => {
                 todo!()
             }