motiejus/zig
1
Fork 0
Code Releases Activity

AstGen: implement extern variables

Browse Source
This commit is contained in:
Andrew Kelley
2021-04-29 19:44:51 -07:00
parent ba9b9cb38d
commit 86d564eed8
4 changed files with 139 additions and 16 deletions
Download Patch File Download Diff File Expand all files Collapse all files

51
src/Module.zig
View File

@@ -1462,6 +1462,57 @@ pub const Scope = struct {
}
}
pub fn addVar(gz: *GenZir, args: struct {
align_inst: Zir.Inst.Ref,
lib_name: u32,
var_type: Zir.Inst.Ref,
init: Zir.Inst.Ref,
is_extern: bool,
}) !Zir.Inst.Ref {
const astgen = gz.astgen;
const gpa = astgen.gpa;
try gz.instructions.ensureUnusedCapacity(gpa, 1);
try astgen.instructions.ensureUnusedCapacity(gpa, 1);
try astgen.extra.ensureUnusedCapacity(
gpa,
@typeInfo(Zir.Inst.ExtendedVar).Struct.fields.len +
@boolToInt(args.lib_name != 0) +
@boolToInt(args.align_inst != .none) +
@boolToInt(args.init != .none),
);
const payload_index = astgen.addExtraAssumeCapacity(Zir.Inst.ExtendedVar{
.var_type = args.var_type,
});
if (args.lib_name != 0) {
astgen.extra.appendAssumeCapacity(args.lib_name);
}
if (args.align_inst != .none) {
astgen.extra.appendAssumeCapacity(@enumToInt(args.align_inst));
}
if (args.init != .none) {
astgen.extra.appendAssumeCapacity(@enumToInt(args.init));
}
const new_index = @intCast(Zir.Inst.Index, astgen.instructions.len);
astgen.instructions.appendAssumeCapacity(.{
.tag = .extended,
.data = .{ .extended = .{
.opcode = .variable,
.small = @bitCast(u16, Zir.Inst.ExtendedVar.Small{
.has_lib_name = args.lib_name != 0,
.has_align = args.align_inst != .none,
.has_init = args.init != .none,
.is_extern = args.is_extern,
}),
.operand = payload_index,
} },
});
gz.instructions.appendAssumeCapacity(new_index);
return gz.indexToRef(new_index);
}
pub fn addCall(
gz: *GenZir,
tag: Zir.Inst.Tag,