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Re: regarding optimization flags
- From: Fabian Cenedese <Cenedese at indel dot ch>
- To: gcc-help at gcc dot gnu dot org
- Date: Mon, 26 Feb 2007 08:51:07 +0100
- Subject: Re: regarding optimization flags
At 16:52 25.02.2007 +0000, ranjith kumar wrote:
>Gcc manuals says
> " Not all optimizations are controlled 'directly'
>by a flag. Only optimizations that have a flag are
>listed."
>
>What does it mean?
>Any one please help me.
-Ox does not only switch on -fx -fy -fz... but also some internal settings
for optimization not separately accessible with any -f option and therefore
not listed in the verbose-asm. This means that you will never be able
to achieve the same result with any combination of -f... as you can
do with an -Ox.
bye Fabi