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codegen: lower error_set and error_union

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This commit is contained in:
Jakub Konka
2022-02-20 16:35:24 +01:00
parent 358b544157
commit f4f23e307c
3 changed files with 52 additions and 6 deletions
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48
src/codegen.zig
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@@ -432,6 +432,54 @@ pub fn generateSymbol(
return Result{ .appended = {} };
},
.ErrorUnion => {
const error_ty = typed_value.ty.errorUnionSet();
const payload_ty = typed_value.ty.errorUnionPayload();
const is_payload = typed_value.val.errorUnionIsPayload();
const error_val = if (!is_payload) typed_value.val else Value.initTag(.zero);
switch (try generateSymbol(bin_file, parent_atom_index, src_loc, .{
.ty = error_ty,
.val = error_val,
}, code, debug_output)) {
.appended => {},
.externally_managed => |external_slice| {
code.appendSliceAssumeCapacity(external_slice);
},
.fail => |em| return Result{ .fail = em },
}
if (payload_ty.hasRuntimeBits()) {
const payload_val = if (typed_value.val.castTag(.eu_payload)) |val| val.data else Value.initTag(.undef);
switch (try generateSymbol(bin_file, parent_atom_index, src_loc, .{
.ty = payload_ty,
.val = payload_val,
}, code, debug_output)) {
.appended => {},
.externally_managed => |external_slice| {
code.appendSliceAssumeCapacity(external_slice);
},
.fail => |em| return Result{ .fail = em },
}
}
return Result{ .appended = {} };
},
.ErrorSet => {
const target = bin_file.options.target;
switch (typed_value.val.tag()) {
.@"error" => {
const name = typed_value.val.getError().?;
const kv = try bin_file.options.module.?.getErrorValue(name);
const endian = target.cpu.arch.endian();
try code.writer().writeInt(u32, kv.value, endian);
},
else => {
try code.writer().writeByteNTimes(0, @intCast(usize, typed_value.ty.abiSize(target)));
},
}
return Result{ .appended = {} };
},
else => |t| {
return Result{
.fail = try ErrorMsg.create(