On 8/7/2017 8:43 AM, Jakub Jelinek wrote:
On Mon, Aug 07, 2017 at 08:39:24AM -0700, H.J. Lu wrote:
When Linux/x86-64 kernel is compiled with -fno-omit-frame-pointer.
this optimization removes more than 730
pushq %rbp
movq %rsp, %rbp
popq %rbp
If you don't want the frame pointer, why are you c
On 8/7/2017 9:16 AM, Michael Matz wrote:
Hi,
On Mon, 7 Aug 2017, Arjan van de Ven wrote:
wanting a framepointer is very nice and desired...
... but if the optimizer/ins scheduler moves instructions outside of the
frame'd portion,
(it does it for cases like below as well), the value is al
On 8/9/2017 8:04 AM, Andi Kleen wrote:
I would add a new option
-fforce-frame-pointer
that gives the old -fno-omit-frame-pointer back, so that
users relying on frame pointers everywhere have a workaround.
that function should also fix the current situation where the framepointer is
not useful
