[Bug debug/52001] [4.7 Regression] Huge compile-time regression with var-tracking

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52001

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

           What    |Removed                     |Added
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             Status|NEW                         |ASSIGNED
         AssignedTo|unassigned at gcc dot       |jakub at gcc dot gnu.org
                   |gnu.org                     |

--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> 2012-01-26 15:50:20 UTC ---
Created attachment 26472
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=26472
gcc47-pr52001.patch

Untested fix.  It doesn't make any sense to insert any reverse ops when V is
already known to have a location which is certainly simpler than that and
permanently available through the entire function.