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spirv: lower air wrap_errunion_err

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Robin Voetter 2023-04-10 22:43:55 +02:00
parent 78c44d63da
commit f62735d98c
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1 changed files with 37 additions and 0 deletions
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37
src/codegen/spirv.zig
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@ -1613,6 +1613,7 @@ pub const DeclGen = struct {
.unreach => return self.airUnreach(),
.unwrap_errunion_err => try self.airErrUnionErr(inst),
.wrap_errunion_err => try self.airWrapErrUnionErr(inst),
.assembly => try self.airAssembly(inst),
@ -2561,6 +2562,42 @@ pub const DeclGen = struct {
return try self.extractField(err_ty_ref, operand_id, eu_layout.errorFieldIndex());
}
fn airWrapErrUnionErr(self: *DeclGen, inst: Air.Inst.Index) !?IdRef {
if (self.liveness.isUnused(inst)) return null;
const ty_op = self.air.instructions.items(.data)[inst].ty_op;
const err_union_ty = self.air.typeOfIndex(inst);
const payload_ty = err_union_ty.errorUnionPayload();
const operand_id = try self.resolve(ty_op.operand);
const eu_layout = self.errorUnionLayout(payload_ty);
if (!eu_layout.payload_has_bits) {
return operand_id;
}
const payload_ty_ref = try self.resolveType(payload_ty, .indirect);
var members = std.BoundedArray(IdRef, 2){};
const payload_id = try self.constUndef(payload_ty_ref);
if (eu_layout.error_first) {
members.appendAssumeCapacity(operand_id);
members.appendAssumeCapacity(payload_id);
// TODO: ABI padding?
} else {
members.appendAssumeCapacity(payload_id);
members.appendAssumeCapacity(operand_id);
// TODO: ABI padding?
}
const err_union_ty_ref = try self.resolveType(err_union_ty, .direct);
const result_id = self.spv.allocId();
try self.func.body.emit(self.spv.gpa, .OpCompositeConstruct, .{
.id_result_type = self.typeId(err_union_ty_ref),
.id_result = result_id,
.constituents = members.slice(),
});
return result_id;
}
fn airSwitchBr(self: *DeclGen, inst: Air.Inst.Index) !void {
const target = self.getTarget();
const pl_op = self.air.instructions.items(.data)[inst].pl_op;