gnu /
gcc /
cfb71062a9209810da06cd9b8dd559b62f0d61c7 x86: Don't allocate stack frame nor align stack if not needed
get_frame_size () returns used stack slots during compilation, which
may be optimized out later. This patch does the followings:
1. Add stack_frame_required to machine_function to indicate that the
function needs a stack frame.
2. Change ix86_find_max_used_stack_alignment to set stack_frame_required.
3. Always call ix86_find_max_used_stack_alignment to check if stack
frame is needed.
Tested on i686 and x86-64 with
--with-arch=native --with-cpu=native
Tested on AVX512 machine configured with
--with-arch=native --with-cpu=native
gcc/
PR target/88483
* config/i386/i386-options.c (ix86_init_machine_status): Set
stack_frame_required to true.
* config/i386/i386.c (ix86_get_frame_size): New function.
(ix86_frame_pointer_required): Replace get_frame_size with
ix86_get_frame_size.
(ix86_compute_frame_layout): Likewise.
(ix86_find_max_used_stack_alignment): Changed to void. Set
stack_frame_required.
(ix86_finalize_stack_frame_flags): Always call
ix86_find_max_used_stack_alignment. Replace get_frame_size with
ix86_get_frame_size.
* config/i386/i386.h (machine_function): Add stack_frame_required.
gcc/testsuite/
PR target/88483
* gcc.target/i386/stackalign/pr88483-1.c: New test.
* gcc.target/i386/stackalign/pr88483-2.c: Likewise.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@271517 138bc75d-0d04-0410-961f-82ee72b054a4
7 files changed
