list or whatever

src/codegen.test.ts

@@ -75,7 +75,7 @@ it("should compute single field struct layout correctly", () => {
           ],
         },
       ],
-      "size": 8,
+      "size": 16,
     }
   `);
 });

src/codegen.ts

@@ -42,8 +42,8 @@ const WASM_PAGE = 65536;
 
 const DUMMY_IDX = 9999999;
 
-const ALLOCATE_ITEM: string[] = ["std", "rt", "alloc", "allocateItem"];
-const DEALLOCATE_ITEM: string[] = ["std", "rt", "alloc", "deallocateItem"];
+const ALLOCATE: string[] = ["std", "rt", "alloc", "allocate"];
+const DEALLOCATE: string[] = ["std", "rt", "alloc", "deallocate"];
 
 type RelocationKind =
   | {
@@ -118,7 +118,7 @@ function appendData(cx: Context, newData: Uint8Array): number {
   }
 }
 
-const KNOWN_DEF_PATHS = [ALLOCATE_ITEM, DEALLOCATE_ITEM];
+const KNOWN_DEF_PATHS = [ALLOCATE, DEALLOCATE];
 
 function getKnownDefPaths(pkgs: Pkg<Typecked>[]): ComplexMap<string[], ItemId> {
   const knows = new ComplexMap<string[], ItemId>();
@@ -384,7 +384,7 @@ function lowerFunc(cx: Context, func: ItemFunction<Typecked>) {
     fcx.wasm.body = body.instructions;
   } else {
     lowerExpr(fcx, wasmFunc.body, body);
-    paramLocations.forEach((local) => {     
+    paramLocations.forEach((local) => {
       const refcount = needsRefcount(local.ty);
       if (refcount !== undefined) {
         // TODO: correctly deal with tuples
@@ -814,7 +814,10 @@ function lowerExpr(
       const { res } = expr.lhs.value;
       if (res.kind === "builtin") {
         const assertArgs = (n: number) => {
-          if (expr.args.length !== n) unreachable("nope");
+          if (expr.args.length !== n)
+            unreachable(
+              `wrong amount of arguments for ${res.name}: expected ${n} found ${expr.args.length}`,
+            );
         };
         switch (res.name) {
           case "trap": {
@@ -842,7 +845,7 @@ function lowerExpr(
             break exprKind;
           }
           case "__i64_store": {
-            assertArgs(3);
+            assertArgs(2);
             lowerExpr(fcx, instrs, expr.args[0]);
             lowerExpr(fcx, instrs, expr.args[1]);
             instrs.push({ kind: "i64.store", imm: {} });
@@ -1053,7 +1056,7 @@ function lowerExpr(
       instrs.push({ kind: "i32.const", imm: BigInt(layout.size) });
       instrs.push({ kind: "i32.const", imm: BigInt(layout.align) });
       const allocate: wasm.Instr = { kind: "call", func: DUMMY_IDX };
-      const allocateItemId = fcx.cx.knownDefPaths.get(ALLOCATE_ITEM);
+      const allocateItemId = fcx.cx.knownDefPaths.get(ALLOCATE);
       if (!allocateItemId) {
         unreachable("std.rt.allocateItem not found");
       }
@@ -1384,9 +1387,6 @@ export function layoutOfStruct(ty_: TyStruct | TyRawPtr): StructLayout {
     return value;
   });
 
-  // we ignore the refcount for struct size.
-  offset -= 4;
-
   if (align === 8 && offset % 8 !== 0) {
     offset += 4;
   }
@@ -1508,7 +1508,7 @@ function subRefcount(
   instrs: wasm.Instr[],
   kind: StructLayout | "string",
 ) {
-  const deallocateItemId = fcx.cx.knownDefPaths.get(DEALLOCATE_ITEM);
+  const deallocateItemId = fcx.cx.knownDefPaths.get(DEALLOCATE);
   if (!deallocateItemId) {
     unreachable("std.rt.deallocateItem not found");
   }

src/typeck/expr.ts

@@ -286,6 +286,10 @@ export function checkBody(
           let ty: Ty;
           let fieldIdx: number | undefined;
           switch (lhs.ty.kind) {
+            case "error": {
+              ty = tyErrorFrom(lhs.ty);
+              break;
+            }
             case "tuple": {
               const { elems } = lhs.ty;
               if (typeof field.value === "number") {
@@ -777,6 +781,11 @@ function checkCall(
   const args = expr.args.map((arg) => fcx.checkExpr(arg));
 
   const lhsTy = lhs.ty;
+
+  if (lhsTy.kind === "error") {
+    return { ...expr, lhs, args, ty: lhsTy };
+  }
+
   if (lhsTy.kind !== "fn") {
     const ty = tyError(
       fcx.cx,

std/list.nil

@@ -1,21 +1,48 @@
 type List[T] = struct {
-    ptr: Int,
-    len: Int,
-    cap: Int,
+    ptr: I32,
+    len: I32,
+    cap: I32,
 };
 
 function new(): List[Int] = (
-    List { ptr: 0, len: 0, cap: 0 }
+    List { ptr: 0_I32, len: 0_I32, cap: 0_I32 }
 );
 
 function push(list: List[Int], elem: Int) = (
-    growIfNeeded(list, 1);
+    growIfNeeded(list, 1_I32);
+    let addr = list.ptr + (SIZEOF * list.len);
+    __i64_store(addr, elem);
+    list.len = list.len + 1_I32;
+);
+
+function debugPrint(list: List[Int]) = (
+    let i = 0_I32;
+    print("[");
+    loop (
+        if i >= list.len then (
+            break;
+        );
+        let elem = __i64_load(list.ptr + (i * SIZEOF));
+        std.printInt(elem);
+        if (i + 1_I32) < list.len then print(", ");
+
+        i = i + 1_I32;
+    );
+    std.println("]");
 );
 
 // PRIVATE:
 
-function growIfNeeded(list: List[Int], elems: Int) = (
+global SIZEOF: I32 = 8_I32;
+global ALIGNOF: I32 = 8_I32;
+
+function growIfNeeded(list: List[Int], elems: I32) = (
     if (list.len + elems) < list.cap then (
-        let newMemory = std.rt.alloc.allocateItem(0_I32, 0_I32);
+        let newMemory = std.rt.alloc.allocate(SIZEOF * list.cap * 2_I32, ALIGNOF);
+        let oldMemory = list.ptr;
+        let amount = SIZEOF * list.len;
+        std.rt.memcpy(newMemory, oldMemory, amount);
+
+        if list.cap > 0_I32 then std.rt.alloc.deallocate(list.ptr, list.cap * SIZEOF);
     );
 );

std/rt/alloc.nil

@@ -7,23 +7,13 @@ global HEAD_PTR: I32 = 1024_I32;
 
 // Allocate a new item. We do not deallocate anything yet.
 // lol.
-function allocateItem(objSize: I32, align: I32): I32 = (
+function allocate(size: I32, align: I32): I32 = (
     if align < 4_I32 then std.abort("invalid alignment");
 
-    // Include the refcount header.
-    let actualSize = 4_I32 + objSize;
-
     // Let's see whether we can fit the refcount into the align bits.
     // I happen to know that everything will always be at least 4 bytes aligned.
     let alignedPtr = std.alignUp(HEAD_PTR, align);
-    let actualObjPtr = if (alignedPtr - HEAD_PTR) > align then (
-        alignedPtr - 4_I32
-    ) else (
-        // Take up the next spot.
-        alignedPtr + align - 4_I32
-    );
-
-    let newHeadPtr = actualObjPtr + actualSize;
+    let newHeadPtr = alignedPtr + size;
 
     if newHeadPtr > __memory_size() then (
         // 16 pages, very arbitrary.
@@ -36,10 +26,10 @@ function allocateItem(objSize: I32, align: I32): I32 = (
 
     HEAD_PTR = newHeadPtr;
 
-    actualObjPtr
+    alignedPtr
 );
 
-function deallocateItem(ptr: I32, objSize: I32) = (
+function deallocate(ptr: I32, size: I32) = (
     std.println("uwu deawwocate :3");
 );