[Bug tree-optimization/23946] New: [4.1 regression] ICE: verify_ssa failed ("definition ... follows the use")

["steven at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>]

Compiling the attached test case, GCC 4.1 ICEs with an SSA internal 
consistency failure.  This works in GCC 4.0.2. 
 
t.c: In function 'avi_parse_comments': 
t.c:6: error: definition in block 22 follows the use 
for SSA_NAME: HEAP.5_158 in statement: 
#   HEAP.5_163 = V_MAY_DEF <HEAP.5_158>; 
#   HEAP.13_164 = V_MAY_DEF <HEAP.13_159>; 
#   HEAP.19_165 = V_MAY_DEF <HEAP.19_160>; 
#   HEAP.25_175 = V_MAY_DEF <HEAP.25_174>; 
*D.1659_162 = 0; 
t.c:6: internal compiler error: verify_ssa failed

-- 
           Summary: [4.1 regression] ICE: verify_ssa failed ("definition ...
                    follows the use")
           Product: gcc
           Version: 4.1.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P2
         Component: tree-optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: steven at gcc dot gnu dot org
                CC: gcc-bugs at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23946