On Mon, Sep 19, 2011 at 4:46 AM, Ira Rosen <ira.ro...@linaro.org> wrote: > Hi, > > When we can't vectorize a certain statement in SLP we mark it as not > vectorizable and continue with the analysis. This is wrong when the > reason for the failure is that we can't analyze a data-ref, because > this way we may miss a data dependence. This patch fails SLP if the > data-refs analysis fails. > > Bootstrapped and tested on powerpc64-suse-linux and i486-linux-gnu. > Committed to trunk.
On Linux/x86, I got FAIL: g++.dg/vect/slp-pr50413.cc scan-tree-dump-times slp "basic block vectorized using SLP" 0 > > PR tree-optimization/50413 > * tree-vect-data-refs.c (vect_analyze_data_refs): Fail to vectorize > a basic block if one of its data-refs can't be analyzed. > > testsuite/ChangeLog: > > PR tree-optimization/50413 > * g++.dg/vect/vect.exp: Run slp-pr* tests with > -fdump-tree-slp-details. Run other tests with > -fdump-tree-vect-details. > * g++.dg/vect/slp-pr50413.cc: New. > -- H.J.
