[Bug debug/41893] New: ICE with -combine and debug

["segher at kernel dot crashing dot org" <gcc-bugzilla at gcc dot gnu dot org>]

[From https://bugzilla.redhat.com/show_bug.cgi?id=531385 ]

Testcase:


cat > file1.c << EOF
struct s1_s {
    int v;
};
struct s1_s g1;
void __attribute__((externally_visible)) func1() {
    struct s1_s *l1 = &g1;
}
EOF

cat > file2.c << EOF
extern struct s1_s g1;
void func2() {
    &g1;
}
EOF

cc -O -g -fwhole-program -combine -c file1.c file2.c


Caused by SVN r152403:

        PR debug/41404
        PR debug/41353
        * cfgexpand.c (expand_debug_expr) <case STRING_CST>: Don't create
        CONST_STRING if STRING_CST contains embedded '\0's or doesn't end with
        '\0'.
        (expand_debug_expr) <case VAR_DECL>: For TREE_STATIC !DECL_EXTERNAL
        vars use DECL_RTL with resetting it back to NULL afterwards.
        * dwarf2out.c (same_dw_val_p): For dw_val_class_addr compare with
        rtx_equal_p instead of asserting it is a SYMBOL_REF.
        (value_format): For dw_val_class_addr only use DW_FORM_addr if
        the attribute type allows it, otherwise use DW_FORM_dataN.
        (mem_loc_descriptor): Handle CONST_STRING.
        (add_const_value_attribute): Handle CONST_STRING using add_AT_addr.
        Handle MEM with CONST_STRING address using add_AT_string.
        (rtl_for_decl_init): Return MEM with CONST_STRING address instead of
        CONST_STRING for const arrays initialized with a string literal.
        (resolve_one_addr, resolve_addr_in_expr, resolve_addr): New functions.
        (dwarf2out_finish): Call resolve_addr.

        * gcc.dg/guality/pr41404-1.c: New test.
        * gcc.dg/guality/pr41353-2.c: New test.


-- 
           Summary: ICE with -combine and debug
           Product: gcc
           Version: 4.5.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: debug
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: segher at kernel dot crashing dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41893