This is mostly because of extra register moves that IRA some times introduces. There is another bug about Inline-asm and the return register.

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On Sep 1, 2008, at 7:36, "rguenth at gcc dot gnu dot org" <[EMAIL PROTECTED] > wrote:



------- Comment #4 from rguenth at gcc dot gnu dot org 2008-09-01 14:36 ------- Well, now -Os -funroll-all-loops doesn't do any unrolling anymore while it did
before.  With -O2 you get what you ask for - unrolled loops.

-funroll-all-loops isn't really a flag to be used in general.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37312

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