fn addAsIndex(gz: *GenZir, inst: Zir.Inst) !Zir.Inst.Index 12681
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12690 fn addAsIndex(gz: *GenZir, inst: Zir.Inst) !Zir.Inst.Index {
const gpa = gz.astgen.gpa;
try gz.instructions.ensureUnusedCapacity(gpa, 1);
try gz.astgen.instructions.ensureUnusedCapacity(gpa, 1);
const new_index: Zir.Inst.Index = @fromBackingInt(@intCast(gz.astgen.instructions.len));
gz.astgen.instructions.appendAssumeCapacity(inst);
gz.instructions.appendAssumeCapacity(new_index);
return new_index;
}