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Re: Difference between -O3 and -O2 with the -f options -O3 adds
- From: "John (Eljay) Love-Jensen" <eljay at adobe dot com>
- To: Matthias Kretz <Matthias dot Kretz at kip dot uni-heidelberg dot de>, GCC-help <gcc-help at gcc dot gnu dot org>
- Date: Wed, 29 Jul 2009 08:52:27 -0700
- Subject: Re: Difference between -O3 and -O2 with the -f options -O3 adds
Hi Mattias,
> Any ideas how to debug this regression further?
Any interesting deltas between these two outputs (O2.s and O3.s):
touch Empty.cpp
gcc -O2 -fverbose-asm -S Empty.cpp -o O2.s
gcc -O3 -fverbose-asm -S Empty.cpp -o O3.s
HTH,
--Eljay