(Android libc maintainer.) should __memcmpeq be in compiler-rt rather than libc?
On Thu, Sep 16, 2021 at 1:35 PM Joseph Myers <jos...@codesourcery.com> wrote: > On Thu, 16 Sep 2021, Chris Kennelly wrote: > > > In terms of relying on the feature: If __memcmpeq is ever exposed as an > a > > simple alias for memcmp (since the notes mention that it's a valid > > implementation), does that open up the possibility of depending on the > > bcmp-like behavior that we were trying to escape? > > The proposal is as an ABI only (compilers would generate calls to > __memcmpeq from boolean uses of memcmp, users wouldn't write calls to > __memcmpeq directly, __memcmpeq wouldn't be declared in installed libc > headers). If such dependence arises, that would suggest a compiler bug > wrongly generating such calls for non-boolean memcmp uses. > > -- > Joseph S. Myers > jos...@codesourcery.com >
