------- Additional Comments From rguenth at tat dot physik dot uni-tuebingen
dot de 2004-12-07 15:35 -------
Subject: Re: [4.0 Regression] Inlining limits
cause 340% performance regression
On Tue, 7 Dec 2004, Richard Guenther wrote:
> static inline void foo() {}
> void bar() { foo(); }
>
> which for -O2 -fprofile-generate produces
>
> bar:
> addl $1, .LPBX1
> pushl %ebp
> movl %esp, %ebp
> adcl $0, .LPBX1+4
> addl $1, .LPBX1+16
> popl %ebp
> adcl $0, .LPBX1+20
> addl $1, .LPBX1+8
> adcl $0, .LPBX1+12
> ret
Mainline manages to produce
bar:
addl $1, .LPBX1
pushl %ebp
movl %esp, %ebp
adcl $0, .LPBX1+4
popl %ebp
ret
but that's RTL instrumentation?
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18704
