https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81736
--- Comment #5 from hjl at gcc dot gnu.org <hjl at gcc dot gnu.org> --- Author: hjl Date: Thu Aug 10 15:29:05 2017 New Revision: 251028 URL: https://gcc.gnu.org/viewcvs?rev=251028&root=gcc&view=rev Log: i386: Don't use frame pointer without stack access When there is no stack access, there is no need to use frame pointer even if -fno-omit-frame-pointer is used and caller's frame pointer is unchanged. gcc/ PR target/81736 * config/i386/i386.c (ix86_finalize_stack_realign_flags): Renamed to ... (ix86_finalize_stack_frame_flags): This. Also clear frame_pointer_needed if -fno-omit-frame-pointer is used without stack access. (ix86_expand_prologue): Replace ix86_finalize_stack_realign_flags with ix86_finalize_stack_frame_flags. (ix86_expand_epilogue): Likewise. (ix86_expand_split_stack_prologue): Likewise. * doc/invoke.texi: Add a note for -fno-omit-frame-pointer. gcc/testsuite/ PR target/81736 * gcc.target/i386/pr81736-1.c: New test. * gcc.target/i386/pr81736-2.c: Likewise. * gcc.target/i386/pr81736-3.c: Likewise. * gcc.target/i386/pr81736-4.c: Likewise. * gcc.target/i386/pr81736-5.c: Likewise. * gcc.target/i386/pr81736-6.c: Likewise. * gcc.target/i386/pr81736-7.c: Likewise. Added: trunk/gcc/testsuite/gcc.target/i386/pr81736-1.c trunk/gcc/testsuite/gcc.target/i386/pr81736-2.c trunk/gcc/testsuite/gcc.target/i386/pr81736-3.c trunk/gcc/testsuite/gcc.target/i386/pr81736-4.c trunk/gcc/testsuite/gcc.target/i386/pr81736-5.c trunk/gcc/testsuite/gcc.target/i386/pr81736-6.c trunk/gcc/testsuite/gcc.target/i386/pr81736-7.c Modified: trunk/gcc/ChangeLog trunk/gcc/config/i386/i386.c trunk/gcc/doc/invoke.texi trunk/gcc/testsuite/ChangeLog
