[Bug middle-end/31738] Fortran dot product vectorization is restricted

rguenth at gcc dot gnu dot org gcc-bugzilla@gcc.gnu.org
Mon Apr 28 09:40:00 GMT 2008



------- Comment #6 from rguenth at gcc dot gnu dot org  2008-04-28 09:39 -------
For testvectdp2 we now miss to apply store-motion so the reduction is no longer
recognized.  This is the bad interaction between PRE and lim for which we have
PR36009.  If you add -fno-tree-pre vectorization fails because of

t.f90:7: note: reduction: not commutative/associative: D.1011_34

even with -ffast-math.


-- 

rguenth at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
  BugsThisDependsOn|                            |36009


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31738



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