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spirv: lower struct aggregate initialization at runtime

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This commit is contained in:
Robin Voetter
2023-09-16 02:15:02 +02:00
committed by Andrew Kelley
parent 001d76a412
commit d06862b759
1 changed files with 28 additions and 3 deletions
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31
src/codegen/spirv.zig
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@@ -1244,7 +1244,7 @@ pub const DeclGen = struct {
const elem_ty = array_type.child.toType();
const elem_ty_ref = try self.resolveType(elem_ty, .indirect);
var constituents = try self.gpa.alloc(IdRef, ty.arrayLenIncludingSentinel(mod));
const constituents = try self.gpa.alloc(IdRef, ty.arrayLenIncludingSentinel(mod));
defer self.gpa.free(constituents);
switch (aggregate.storage) {
@@ -1272,8 +1272,33 @@ pub const DeclGen = struct {
}
return try self.constructStruct(result_ty_ref, constituents);
},
.vector_type => return self.todo("constant aggregate of type {}", .{ty.fmt(mod)}),
.anon_struct_type => unreachable, // TODO
.struct_type => {
const struct_ty = mod.typeToStruct(ty).?;
if (struct_ty.layout == .Packed) {
return self.todo("packed struct constants", .{});
}
var constituents = std.ArrayList(IdRef).init(self.gpa);
defer constituents.deinit();
for (struct_ty.fields.values(), 0..) |field, i| {
if (field.is_comptime or !field.ty.hasRuntimeBits(mod)) continue;
const field_val = switch (aggregate.storage) {
.bytes => |bytes| try ip.get(mod.gpa, .{ .int = .{
.ty = field.ty.toIntern(),
.storage = .{ .u64 = bytes[i] },
} }),
.elems => |elems| elems[i],
.repeated_elem => |elem| elem,
};
const field_id = try self.constant(field.ty, field_val.toValue(), .indirect);
try constituents.append(field_id);
}
return try self.constructStruct(result_ty_ref, constituents.items);
},
.vector_type, .anon_struct_type => unreachable, // TODO
else => unreachable,
},
else => {