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spirv: lower air optional_payload

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Implements lowering the AIR tag optional_payload.

Also fixes an issue with lowering constant ints.
This commit is contained in:
Robin Voetter 2023-04-11 22:29:02 +02:00
parent 83ab1ba8fd
commit 6c16465d45
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GPG Key ID: E755662F227CB468
1 changed files with 24 additions and 5 deletions
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29
src/codegen/spirv.zig
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@ -957,11 +957,11 @@ pub const DeclGen = struct {
switch (ty.zigTypeTag()) {
.Int => {
const int_bits = if (ty.isSignedInt())
@bitCast(u64, val.toSignedInt(target))
else
val.toUnsignedInt(target);
try self.genConstInt(result_ty_ref, result_id, int_bits);
if (ty.isSignedInt()) {
try self.genConstInt(result_ty_ref, result_id, val.toSignedInt(target));
} else {
try self.genConstInt(result_ty_ref, result_id, val.toUnsignedInt(target));
}
},
.Bool => {
const operands = .{ .id_result_type = result_ty_id, .id_result = result_id };
@ -1717,6 +1717,8 @@ pub const DeclGen = struct {
.is_null => try self.airIsNull(inst, .is_null),
.is_non_null => try self.airIsNull(inst, .is_non_null),
.optional_payload => try self.airUnwrapOptional(inst),
.assembly => try self.airAssembly(inst),
.call => try self.airCall(inst, .auto),
@ -2694,6 +2696,23 @@ pub const DeclGen = struct {
};
}
fn airUnwrapOptional(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 operand_id = try self.resolve(ty_op.operand);
const optional_ty = self.air.typeOf(ty_op.operand);
const payload_ty = self.air.typeOfIndex(inst);
if (!payload_ty.hasRuntimeBitsIgnoreComptime()) return null;
if (optional_ty.optionalReprIsPayload()) {
return operand_id;
}
return try self.extractField(payload_ty, operand_id, 0);
}
fn airSwitchBr(self: *DeclGen, inst: Air.Inst.Index) !void {
const target = self.getTarget();
const pl_op = self.air.instructions.items(.data)[inst].pl_op;