[Bug tree-optimization/39300] vectorizer confused by predictive commoning and PRE

[matz at gcc dot gnu dot org]

------- Comment #7 from matz at gcc dot gnu dot org  2009-07-22 15:31 -------
Subject: Bug 39300

Author: matz
Date: Wed Jul 22 15:30:50 2009
New Revision: 149942

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=149942
Log:
        PR tree-optimization/35229
        PR tree-optimization/39300

        * tree-ssa-pre.c (includes): Include tree-scalar-evolution.h.
        (inhibit_phi_insertion): New function.
        (insert_into_preds_of_block): Call it for REFERENCEs.
        (init_pre): Initialize and finalize scalar evolutions.
        * Makefile.in (tree-ssa-pre.o): Depend on tree-scalar-evolution.h .

testsuite/
        * gcc.dg/vect/vect-pre-interact.c: New test.

Added:
    trunk/gcc/testsuite/gcc.dg/vect/vect-pre-interact.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-ssa-pre.c


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39300