[Bug tree-optimization/41486] New: cselim is not dse aware

[chrbr at gcc dot gnu dot org]

The cs elim pass introduces a conditional store, but does not remove the
original one. If the former is not removed by DSE, this results in worse code.

original thread: http://gcc.gnu.org/ml/gcc-patches/2009-09/msg01955.html.

on machines with no predicated stores, disabling this optimization is generally
a win, but only as a workaround.


-- 
           Summary: cselim is not dse aware
           Product: gcc
           Version: tree-ssa
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: chrbr at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41486