ir done'ish

src/ir/inst.zig

@@ -251,6 +251,10 @@ pub const Conversion = struct {
 pub const FieldAccess = struct {
     base: Ref,
     field_index: u32,
+    /// The IR type of the aggregate being accessed (struct, union, etc.).
+    /// Used by the LLVM emitter to resolve the correct type for GEP operations
+    /// without guessing from LLVM value chains.
+    base_type: ?TypeId = null,
 };
 
 pub const Aggregate = struct {
@@ -286,6 +290,9 @@ pub const BuiltinCall = struct {
 pub const BuiltinId = enum(u16) {
     out,
     sqrt,
+    sin,
+    cos,
+    floor,
     size_of,
     cast,
     malloc,