[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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