Q: what exactly does -fomit-frame-pointer do?

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Article #50927

#50927

From: Eyal Lebedinsky
Date: Tue, 27 Jul 1993 12:34

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Hello,

I see many packages configured with this option. I understand that it
will eliminate the frame pointer for functions that do not need it, thus
freeing up another register and maybe saving on housekeeping code.

However, when I tried it on my program, it grew up from 220k to 240k.
The Q is: what's going on? If the frame pointer was not needed then how
comes removing it adds more code? If the extra code is compensated by
faster execution then I may consider it - can someone give a sketch of
what this option does?

I understand enough about compiler internals and code generation so
there is no need to make the answer 'simple'.


--
Regards
	Eyal Lebedinsky		eyal@ise.canberra.edu.au

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From: eyal@fir.canberra.edu.au (Eyal Lebedinsky)
Subject: Q: what exactly does -fomit-frame-pointer do?
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Date: 27 Jul 93 12:34:26 GMT
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