[Bug tree-optimization/64528] New: [5 Regression] ICE: in process_constraint, at tree-ssa-structalias.c:3002 with -O -fno-tree-ccp -fno-tree-dce

[zsojka at seznam dot cz]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64528

            Bug ID: 64528
           Summary: [5 Regression] ICE: in process_constraint, at
                    tree-ssa-structalias.c:3002 with -O -fno-tree-ccp
                    -fno-tree-dce
           Product: gcc
           Version: 5.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: zsojka at seznam dot cz

Created attachment 34397
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=34397&action=edit
reduced testcase (from gfortran.dg/value_test.f90)

Compiler output:
$ gcc -O -fno-tree-ccp -fno-tree-dce testcase.f90 
testcase.f90:11:0:

 end program valueTests
 ^
internal compiler error: in process_constraint, at tree-ssa-structalias.c:3002
0xe7907d process_constraint
        /mnt/svn/gcc-trunk/gcc/tree-ssa-structalias.c:3002
0xe793b3 process_all_all_constraints
        /mnt/svn/gcc-trunk/gcc/tree-ssa-structalias.c:3581
0xe84cd3 find_func_aliases
        /mnt/svn/gcc-trunk/gcc/tree-ssa-structalias.c:4748
0xe87c26 compute_points_to_sets
        /mnt/svn/gcc-trunk/gcc/tree-ssa-structalias.c:6825
0xe87c26 compute_may_aliases()
        /mnt/svn/gcc-trunk/gcc/tree-ssa-structalias.c:7161
0xbbd8ec execute_function_todo
        /mnt/svn/gcc-trunk/gcc/passes.c:1912
0xbbe563 execute_todo
        /mnt/svn/gcc-trunk/gcc/passes.c:1997
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://gcc.gnu.org/bugs.html> for instructions.

Tested revisions:
r219277 - ICE
r218446 - ICE
r212099 - ICE
4_9 r219040 - OK