[Bug tree-optimization/64365] Predictive commoning after loop vectorization produces incorrect code.

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64365

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |wrong-code
             Status|UNCONFIRMED                 |ASSIGNED
   Last reconfirmed|                            |2015-01-14
           Assignee|unassigned at gcc dot gnu.org      |rguenth at gcc dot gnu.org
     Ever confirmed|0                           |1

--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Can you provide an executable testcase that abort()s when miscompiled and
terminates successfully if not?  Thus something suitable for the testsuite?
That also makes it possible to bisect to a commit that broke this.

A hint may be

   <bb 6>:
+  _6 = MEM[(int *)in_7(D) + 24B(OVF)];
   goto <bb 4>;

that appears in the pcom dump.