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wasm: fix error union constant lowering

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This commit is contained in:
Andrew Kelley 2023-05-26 13:21:35 -07:00
parent abded5cbb0
commit 63dc0447fc
1 changed files with 16 additions and 5 deletions
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21
src/arch/wasm/CodeGen.zig
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@ -3183,15 +3183,26 @@ fn lowerConstant(func: *CodeGen, arg_val: Value, ty: Type) InnerError!WValue {
const kv = try mod.getErrorValue(name);
return WValue{ .imm32 = kv.value };
},
.error_union => {
const error_type = ty.errorUnionSet(mod);
.error_union => |error_union| {
const err_tv: TypedValue = switch (error_union.val) {
.err_name => |err_name| .{
.ty = ty.errorUnionSet(mod),
.val = (try mod.intern(.{ .err = .{
.ty = ty.errorUnionSet(mod).toIntern(),
.name = err_name,
} })).toValue(),
},
.payload => .{
.ty = Type.err_int,
.val = try mod.intValue(Type.err_int, 0),
},
};
const payload_type = ty.errorUnionPayload(mod);
if (!payload_type.hasRuntimeBitsIgnoreComptime(mod)) {
// We use the error type directly as the type.
const is_pl = val.errorUnionIsPayload(mod);
const err_val = if (!is_pl) val else try mod.intValue(error_type, 0);
return func.lowerConstant(err_val, error_type);
return func.lowerConstant(err_tv.val, err_tv.ty);
}
return func.fail("Wasm TODO: lowerConstant error union with non-zero-bit payload type", .{});
},
.enum_tag => |enum_tag| {