WIP: fix passing small structs on AMD64

This fixes #792.
inko-lang · Jan 9, 2025 · d0fa661 · d0fa661
1 parent 71a9d23
commit d0fa661
Showing 1 changed file with 14 additions and 1 deletion.
diff --git a/compiler/src/llvm/context.rs b/compiler/src/llvm/context.rs
@@ -236,7 +236,20 @@ impl Context {
                     // To avoid the complexity of that we take the same approach
                     // as Rust: if the struct is larger than 8 bytes, we turn it
                     // into two 64 bits values.
-                    ArgumentType::Regular(self.two_words().as_basic_type_enum())
+                    let align = layouts.target_data.get_abi_alignment(&typ);
+                    let rest = max(bytes - 8, align);
+                    let a = self.i64_type().into();
+                    let b = self.custom_int(size_in_bits(rest)).into();
+
+                    // TODO: remove
+                    println!(
+                        "{} (align: {}) = struct {{ {}, {} }}",
+                        typ, align, a, b
+                    );
+
+                    ArgumentType::Regular(
+                        self.struct_type(&[a, b]).as_basic_type_enum(),
+                    )
                 } else {
                     ArgumentType::StructValue(typ)
                 }