[Bug tree-optimization/22280] New: [4.1 Regression] ICE in referenced_var_lookup while compiling ali.adb

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

This was introduced by:
2005-06-29  Daniel Berlin  <dberlin@dberlin.org>
        
        * tree-complex.c (complex_variable_components): Now a hashtable.
        (cvc_lookup): Ditto.
        (cvc_insert): Ditto. 
        (create_components): Use referenced var iterator.
        Initialize hashtable.   Use cvc_insert/lookup.
        (extract_components): Use cvc_insert/lookup.
        (update_complex_components): Ditto.
        (update_complex_components_on_edge): Ditto.
        * tree-dfa.c (referenced_vars): Now a hashtable.
        (dump_referenced_vars): Use iterator.
        (referenced_var_lookup): New function.
        (referenced_var_insert): Ditto.
        (add_referenced_var): Use referenced_var_insert.
        (mark_new_vars_to_rename): Use DECL_UID.
        * tree-flow-inline.h (first_htab_element): New function.
        (end_htab_p): Ditto.
.....

I will try to get a C testcase.  It is an interaction between SRA and referenced variables.
Actually thinking about it we cannot get a C testcase as in Ada, we can have ADDR_EXPR of
a constructor which means we can introduce a new referenced variable which we are trying to
mark to rename.
Here is the backtrace:
#0  fancy_abort (file=0xc1bff0 "/Users/pinskia/src/cool/gcc/gcc/tree-dfa.c", line=540, 
function=0xd84750 "referenced_var_lookup") at /Users/pinskia/src/cool/gcc/gcc/diagnostic.c:590
#1  0x00a27540 in referenced_var_lookup (uid=44) at /Users/pinskia/src/cool/gcc/gcc/tree-dfa.c:540
#2  0x00ae5698 in generate_element_init (elt=0x4392d008, init=0x43673240, list_p=0xbffff41c) at /
Users/pinskia/src/cool/gcc/gcc/tree-sra.c:1741
#3  0x00ae6b84 in scalarize_init (lhs_elt=0x4392d008, rhs=0x43673240, bsi=0xbffff598) at /Users/
pinskia/src/cool/gcc/gcc/tree-sra.c:1946
#4  0x00ae0ac0 in sra_walk_modify_expr (expr=0x446198a0, bsi=0xbffff598, fns=0xd88244) at /
Users/pinskia/src/cool/gcc/gcc/tree-sra.c:850
#5  0x00ae11b4 in sra_walk_function (fns=0xd88244) at /Users/pinskia/src/cool/gcc/gcc/tree-sra.c:
922
#6  0x00ae70e8 in scalarize_function () at /Users/pinskia/src/cool/gcc/gcc/tree-sra.c:2107
#7  0x00ae7420 in tree_sra () at /Users/pinskia/src/cool/gcc/gcc/tree-sra.c:2166
#8  0x00603fe0 in execute_one_pass (pass=0xd3763c) at /Users/pinskia/src/cool/gcc/gcc/tree-
optimize.c:714
#9  0x00604160 in execute_pass_list (pass=0xd3763c) at /Users/pinskia/src/cool/gcc/gcc/tree-
optimize.c:751
#10 0x0060418c in execute_pass_list (pass=0xd28880) at /Users/pinskia/src/cool/gcc/gcc/tree-
optimize.c:752
#11 0x00604884 in tree_rest_of_compilation (fndecl=0x43649480) at /Users/pinskia/src/cool/gcc/
gcc/tree-optimize.c:914

-- 
           Summary: [4.1 Regression] ICE in referenced_var_lookup while
                    compiling ali.adb
           Product: gcc
           Version: 4.1.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code, build
          Severity: normal
          Priority: P2
         Component: tree-optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: pinskia at gcc dot gnu dot org
                CC: gcc-bugs at gcc dot gnu dot org
GCC target triplet: powerpc-darwin7.9.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=22280