Commit dbd44658ff2d392451ea4f3a38ca4bd26da34314 | zig

author	Andrew Kelley <andrew@ziglang.org> 2023-05-26 13:16:33-07:00
committer	Andrew Kelley <andrew@ziglang.org> 2023-05-26 21:10:54-07:00
log	dbd44658ff2d392451ea4f3a38ca4bd26da34314
tree	ad2d5ffed976e6c6e1a49d5b5297a50611081088
parent	8f5f8090c5a58c41bf0ae7cec282c0949f459d2f

1 files changed, 8 insertions(+), 3 deletions(-)

src/arch/wasm/CodeGen.zig+8-3

 @@ -3090,9 +3090,14 @@ fn lowerConstant(func: *CodeGen, arg_val: Value, ty: Type) InnerError!WValue {
         },
         .ErrorUnion => {
             const error_type = ty.errorUnionSet();
-            const is_pl = val.errorUnionIsPayload();
+            const payload_type = ty.errorUnionPayload();
-            const err_val = if (!is_pl) val else Value.initTag(.zero);
+            if (!payload_type.hasRuntimeBitsIgnoreComptime()) {
-            return func.lowerConstant(err_val, error_type);
+                // We use the error type directly as the type.
+                const is_pl = val.errorUnionIsPayload();
+                const err_val = if (!is_pl) val else Value.initTag(.zero);
+                return func.lowerConstant(err_val, error_type);
+            }
+            return func.fail("Wasm TODO: lowerConstant error union with non-zero-bit payload type", .{});
         },
         .Optional => if (ty.optionalReprIsPayload()) {
             var buf: Type.Payload.ElemType = undefined;