Bug 13822

Summary:	enable -fomit-frame-pointer or at least -momit-frame-pointer by default on x86/dwarf2 platforms
Product:	gcc	Reporter:	Dan Nicolaescu <dann>
Component:	target	Assignee:	Not yet assigned to anyone <unassigned>
Status:	RESOLVED FIXED
Severity:	enhancement	CC:	gcc-bugs, solar-gcc, Thomas.Koenig, tkho
Priority:	P2	Keywords:	missed-optimization
Version:	4.0.0
Target Milestone:	---
Host:		Target:	i?86-- with DWARF-2 support
Build:		Known to work:
Known to fail:		Last reconfirmed:	2009-04-22 21:58:36

Description Dan Nicolaescu 2004-01-22 23:37:43 UTC

This has been mentioned on the mailing lists a few times by 
various people. 

But it seems to have been forgotten. 
This PR is just a reminder for this issue.

The old issue with debugging without a frame pointer seems to be solved,
x86_64 works fine without fp. 

Someone also suggested that the next step should be -mfpmath=sse by default. :-)

Comment 1 Drea Pinski 2004-01-23 02:15:09 UTC

-mfpmath=sse should be only done for systems which support sse.

Confirmed, this is a target problem and it only happens on i?86 and x86_64, this also needs 
variable tracking (I forgot the PR number for that one).

Comment 2 Drea Pinski 2004-11-24 06:32:14 UTC

Most recent talk:
http://gcc.gnu.org/ml/gcc-patches/2004-11/msg01958.html

Comment 3 Drea Pinski 2005-03-18 22:06:09 UTC

*** Bug 20545 has been marked as a duplicate of this bug. ***

Comment 4 Drea Pinski 2005-08-16 01:05:19 UTC

*** Bug 23414 has been marked as a duplicate of this bug. ***

Comment 5 Alexander Peslyak 2011-11-08 01:40:18 UTC

Shouldn't this bug be closed now, with GCC 4.6's change of default for -fomit-frame-pointer?

Comment 6 Dan Nicolaescu 2012-05-21 17:05:22 UTC

Done in gcc-4.6