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cbe: implement airUnionInit

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This commit is contained in:
Jacob Young 2022-10-08 11:29:06 -04:00
parent 6a4266d62a
commit 962f33ee11
3 changed files with 33 additions and 13 deletions
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39
src/codegen/c.zig
View File

@ -4331,16 +4331,43 @@ fn airAggregateInit(f: *Function, inst: Air.Inst.Index) !CValue {
fn airUnionInit(f: *Function, inst: Air.Inst.Index) !CValue {
if (f.liveness.isUnused(inst)) return CValue.none;
const inst_ty = f.air.typeOfIndex(inst);
const ty_pl = f.air.instructions.items(.data)[inst].ty_pl;
const extra = f.air.extraData(Air.UnionInit, ty_pl.payload).data;
const union_ty = f.air.typeOfIndex(inst);
const target = f.object.dg.module.getTarget();
const layout = union_ty.unionGetLayout(target);
const union_obj = union_ty.cast(Type.Payload.Union).?.data;
const field_name = union_obj.fields.keys()[extra.field_index];
const payload = try f.resolveInst(extra.init);
const writer = f.object.writer();
const local = try f.allocLocal(inst_ty, .Const);
try writer.writeAll(" = ");
const local = try f.allocLocal(union_ty, .Const);
try writer.writeAll(" = {");
if (union_ty.unionTagTypeSafety()) |tag_ty| {
if (layout.tag_size != 0) {
const field_index = tag_ty.enumFieldIndex(field_name).?;
_ = local;
_ = ty_pl;
return f.fail("TODO: C backend: implement airUnionInit", .{});
var tag_val_pl: Value.Payload.U32 = .{
.base = .{ .tag = .enum_field_index },
.data = @intCast(u32, field_index),
};
const tag_val = Value.initPayload(&tag_val_pl.base);
var int_val_pl: Value.Payload.U64 = undefined;
const int_val = tag_val.enumToInt(tag_ty, &int_val_pl);
try writer.print(".tag = {}, ", .{try f.fmtIntLiteral(tag_ty, int_val)});
}
try writer.writeAll(".payload = {");
}
try writer.print(".{ } = ", .{fmtIdent(field_name)});
try f.writeCValue(writer, payload);
if (union_ty.unionTagTypeSafety()) |_| try writer.writeByte('}');
try writer.writeAll("};\n");
return local;
}
fn airPrefetch(f: *Function, inst: Air.Inst.Index) !CValue {

1
test/behavior/translate_c_macros.zig
View File

@ -58,7 +58,6 @@ test "cast negative integer to pointer" {
test "casting to union with a macro" {
if (builtin.zig_backend == .stage2_wasm) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_c) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO

6
test/behavior/union.zig
View File

@ -776,7 +776,6 @@ test "return union init with void payload" {
}
test "@unionInit stored to a const" {
if (builtin.zig_backend == .stage2_c) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
@ -939,7 +938,6 @@ test "function call result coerces from tagged union to the tag" {
}
test "cast from anonymous struct to union" {
if (builtin.zig_backend == .stage2_c) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
@ -972,7 +970,6 @@ test "cast from anonymous struct to union" {
}
test "cast from pointer to anonymous struct to pointer to union" {
if (builtin.zig_backend == .stage2_c) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
@ -1135,7 +1132,6 @@ test "global variable struct contains union initialized to non-most-aligned fiel
}
test "union with no result loc initiated with a runtime value" {
if (builtin.zig_backend == .stage2_c) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO
@ -1152,7 +1148,6 @@ test "union with no result loc initiated with a runtime value" {
}
test "union with a large struct field" {
if (builtin.zig_backend == .stage2_c) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO
@ -1321,7 +1316,6 @@ test "union and enum field order doesn't match" {
}
test "@unionInit uses tag value instead of field index" {
if (builtin.zig_backend == .stage2_c) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO