[Bug tree-optimization/18048] [4.0 Regression] mgrid loop performance regression with ivopts

pinskia at gcc dot gnu dot org gcc-bugzilla@gcc.gnu.org
Sat Jan 22 17:54:00 GMT 2005


------- Additional Comments From pinskia at gcc dot gnu dot org  2005-01-22 17:54 -------
(In reply to comment #8)
> Actually I think the remaining issues of the mgrid performance regression are caused by PR 19038.

Well I looked the assembly and it looks like a regresiter allocator problem now because with -fno-
ivopts we don't spill but with it turned we do.

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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18048



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