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Subject: [Bug tree-optimization/55107] [4.7/4.8 Regression] GCC in an infinite loop in PRE
Date: Mon, 10 Dec 2012 09:51:00 -0000
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55107

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

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

--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> 2012-12-10 09:50:51 UTC ---
Mine.  We don't stop insertion:

Starting insert iteration 3362
Found partial redundancy for expression {nop_expr,d_33} (0024)
Skipping insertion of phi for partial redundancy: Looks like an induction
variable
Inserted pretmp_3451 = (unsigned short) d_25;
 in predecessor 19
Found fully redundant value
Found fully redundant value
Found fully redundant value
Found fully redundant value
Found fully redundant value
Found fully redundant value
Found fully redundant value
Found fully redundant value
Found fully redundant value
Starting insert iteration 3363
Found partial redundancy for expression {nop_expr,d_33} (0024)
Skipping insertion of phi for partial redundancy: Looks like an induction
variable
Inserted pretmp_3452 = (unsigned short) d_25;
 in predecessor 19
Found fully redundant value
Found fully redundant value
Found fully redundant value
Found fully redundant value
Found fully redundant value
Found fully redundant value
Found fully redundant value
Found fully redundant value
Found fully redundant value
Starting insert iteration 3364
Found partial redundancy for expression {nop_expr,d_33} (0024)
...