Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
[compiler-rt] Implement __clear_cache on FreeBSD/powerpc
dd91734 (Add clear_cache implementation for ppc64. Fix buffer to meet ppc64 alignment., 2017-07-28), adds an implementation for __builtin___clear_cache on powerpc64, which was promptly ammended to also be used with big endian mode in f67036b (This ppc64 implementation of clear_cache works for both big and little endian., 2017-08-02) clang will use this implementation for it's builtin on FreeBSD and result in an abort() in the cases where 32-bit generation was requested (ex in macppc or when the big endian powerpc64 build was done with "-m32") and as reported[1] recently with pcre2, but there is no reason why the same code couldn't be used in those cases, so use instead the more generic identifier for the PowerPC architecture. While at it, update the comment to reflect that POWER8/9 have a 128 byte wide cache line and so the code could instead use 64 byte windows instead but that possible optimization has been punted for now. [1] PCRE2Project/pcre2#92 Reviewed By: jhibbits, #powerpc, MaskRay Differential Revision: https://reviews.llvm.org/D122640
- Loading branch information