http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60926
--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> --- (In reply to gidici61 from comment #2) > Register rsp is correctly aligned before "call g1"; let's assume rsp=0xB0. > "call g1" pushes rip (8 bytes) on the stack. Now rsp=0xA8. > Then "pushq %rbp" subtracts 8. Now rsp=0xA0. > "subq $8, %rsp" subtracts 8. Now rsp=0x98 > So before calling g2() rsp is not properly aligned. call also pushes onto the stack.
