https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104971
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |9.5
Summary|Optimisation for |[9/10/11/12 Regression]
|__builtin_ia32_readeflags |Optimisation for
|corrupts the stack |__builtin_ia32_readeflags
| |corrupts the stack
CC| |jakub at gcc dot gnu.org
Priority|P3 |P2
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
The builtin has been implemented in
r0-127024-g9bbd48d120d203e8eade09e0bb830370b6d69801
and the pop is optimized away with pushf kept since
r5-4951-g4ab74a01477d4089a3474d52479ed372c9b5ae29
so this is a regression from GCC 4.9.
