R Hill wrote:
Richard Guenther wrote:
On 7/14/05, Richard Guenther <[EMAIL PROTECTED]> wrote:
As subject says - on x86_64 it takes a whopping 30 minutes to
compile said with -fprofile-generate!
It's caused by -frename-registers enabled by -funroll-loops. Compiling
with -O2 -fno-unroll-loops -fprofile-generate compared to -O2
-fno-unroll-loops
-fprofile-generate -frename-registers takes 14 minutes instead of 31.
Please consider not enabling -frename-registers for -fprofile-generate.
I thought -frename-registers defaulted to disabled now. On the 4.0
branch the manual states it's not enabled by opt switches due to known
bugs. Is it also enabled by -funroll-loops on the branch?
Nevermind, I've just found the relevant discussion. ;P
--de.
