[Bug tree-optimization/45978] [4.6 Regression] bogus "array subscript is above array bounds" warning in extremely simple code with no loops

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45978

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
           Keywords|                            |diagnostic
   Last reconfirmed|                            |2010.10.12 09:44:10
          Component|middle-end                  |tree-optimization
     Ever Confirmed|0                           |1
            Summary|bogus "array subscript is   |[4.6 Regression] bogus
                   |above array bounds" warning |"array subscript is above
                   |in extremely simple code    |array bounds" warning in
                   |with no loops               |extremely simple code with
                   |                            |no loops
   Target Milestone|---                         |4.6.0

--- Comment #1 from Richard Guenther <rguenth at gcc dot gnu.org> 2010-10-12 
09:44:10 UTC ---
Confirmed.  The vectorizer uses &MEM[(struct Y *)&<retval>].ar[4]; as the
base address for the store to .c.x, .c.y, .c.z, .d.