We checked, no significant gains or losses. -----Original Message----- From: H.J. Lu [mailto:hjl.to...@gmail.com] Sent: Friday, December 14, 2012 1:03 AM To: Jan Hubicka Cc: Jakub Jelinek; Xinliang David Li; GCC Patches; Teresa Johnson; Melik-adamyan, Areg Subject: Re: [PATCH i386]: Enable push/pop in pro/epilogue for modern CPUs
On Thu, Dec 13, 2012 at 12:40 PM, Jan Hubicka <hubi...@ucw.cz> wrote: >> > Here we speak about memcpy/memset only. I never got around to >> > modernize strlen and friends, unfortunately... >> > >> > memcmp and friends are different beats. They realy need some TLC... >> >> memcpy and memset in glibc are also extremely fast. > > The default strategy now is to inline only when the block is known to > be small (either constant or via profile feedback, we do not really > use the info on upper bound of size of the copied object that would be > useful but not readilly available at expansion time). > > You can try the test_stringop script I attached and send me the > results. For Areg, can you give it a try? Thanks. > me libc starts to be win only for rather large blocks (i.e. >8KB) > Which glibc are you using? -- H.J.
