On 12/23/2009 01:01 PM, Steven Bosscher wrote:
On Wed, Dec 23, 2009 at 12:49 PM, Bingfeng Mei<b...@broadcom.com> wrote:
Hello,
I encounter an issue with PRE optimization, which created worse
Is this at -O2 or -O3?
I think this could be fixed if fwprop propagated addresses into loops;
it doesn't because it made performance worse on x86. The real reason is
"address_cost on x86 sucks and nobody knows how to fix it exactly", but
the performance hit was bad enough that we (Steven Bosscher and I)
decided to put that hack into fwprop.
Paolo
