| Issue |
146159
|
| Summary |
Modular Printf Implemenation
|
| Labels |
new issue
|
| Assignees |
|
| Reporter |
mysterymath
|
This is a tracking issue for implemenation work for [RFC: printf Code Size Optimization](https://discourse.llvm.org/t/rfc-printf-code-size-optimization/83146).
This would take the form of a new clang function attribute, `modular_format(<modular_impl_fn>, <impl_name>, <aspects...>)`. This could only be applied to functions that also bear the `format` attribute. It would inform the compiler that it could redirect the call to the modular version of the function, so long as it emitted a reference to a symbol corresponding to each requested aspect that it could not prove is unused by the call.
The symbols referenced take the form `<impl_name>_<aspect>`, which allows many different front-end functions to share the same implementation. For example, `fprintf`, and `printf` would both share the implementation name `__printf`.
The initial implementation would support only the `float` aspect, which is required by any call with a floating point argument.
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