AIX 7.2 TL5 SP4 and AIX 7.3 TL0 SP2 have been released as of now.
The linker in these OS versions recognizes and properly supports
__start_SECNAME and __stop_SECNAME symbols which are needed for PGO.
This reverts commit 93bb2f16e8.
GCC r187297 (2012-05) introduced `__gcov_dump` and `__gcov_reset`.
`__gcov_flush = __gcov_dump + __gcov_reset`
The resolution to https://gcc.gnu.org/PR93623 ("No need to dump gcdas when forking" target GCC 11.0) removed the unuseful and undocumented __gcov_flush.
Close PR38064.
Reviewed By: calixte, serge-sans-paille
Differential Revision: https://reviews.llvm.org/D83149
Wael Yehia