[Bug target/39137] [4.4 Regression] -mpreferred-stack-boundary=2 causes lots of dynamic realign

[Joey dot ye at intel dot com]

------- Comment #35 from Joey dot ye at intel dot com  2009-03-04 01:41 -------
(In reply to comment #32)
> I don't see the reason for && optimize_function_for_size_p (cfun), care to back
> up with benchmarks that forcing dynamic realignment for long long variables
> with -mpreferred-stack-boundary=2 improves performance rather than slows things
> down (because of the dynamic realignment)?
Checking optimize_function_for_size_p is to avoid prologue/epilogue code size
increase when -Os is used, which is initially complained by Jakub.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39137