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[FMV] Require all function versions declared in TU with default defin… #328

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Merged
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Jul 8, 2024
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[FMV] Require all function versions declared in TU with default defin… #328

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8 changes: 4 additions & 4 deletions main/acle.md
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Original file line number Diff line number Diff line change
Expand Up @@ -397,6 +397,7 @@ Armv8.4-A [[ARMARMv84]](#ARMARMv84). Support is added for the Dot Product intrin
#### Changes for next release

* Fixed incorrect system register dependencies in Function Multi Versioning.
* Added a requirement for function version declaration in Function Multi Versioning.

### References

Expand Down Expand Up @@ -2519,16 +2520,15 @@ following:

* when applied to a function it becomes one of the versions. Function
with the same name may exist with multiple versions in the same
translation unit.
* Function versions may reside in different translation units.
* Each version declaration should be visible at the translation
unit in which the corresponding function version resides.
or in different translation units.
* One `default` version of the function is required to be provided
in one of the translation units.
* Implicitly, without this attribute,
* or explicitly providing the `default` in the attribute.
* All instances of the versions shall share the same function
signature and calling convention.
* All the function versions must be declared at the translation
unit in which the definition of the default version resides.

The attribute `__attribute__((target_clones("name",...)))` expresses the
following:
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