* regarding optimization flags
@ 2007-02-25 17:10 ranjith kumar
2007-02-26 9:50 ` Fabian Cenedese
0 siblings, 1 reply; 2+ messages in thread
From: ranjith kumar @ 2007-02-25 17:10 UTC (permalink / raw)
To: gcc-help
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.
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^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: regarding optimization flags
2007-02-25 17:10 regarding optimization flags ranjith kumar
@ 2007-02-26 9:50 ` Fabian Cenedese
0 siblings, 0 replies; 2+ messages in thread
From: Fabian Cenedese @ 2007-02-26 9:50 UTC (permalink / raw)
To: gcc-help
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
^ permalink raw reply [flat|nested] 2+ messages in thread
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2007-02-25 17:10 regarding optimization flags ranjith kumar
2007-02-26 9:50 ` Fabian Cenedese
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