[Bug c++/45983] ICE: tree code 'template_parm_index' is not supported in gimple streams with -lto

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45983

--- Comment #8 from Richard Guenther <rguenth at gcc dot gnu.org> 2010-10-12 14:54:58 UTC ---
We have an array type with a TYPE_DOMAIN with TYPE_MAXVAL being
template_parm_index - 1.  The array is field 'm' in chunk_array_t
which is the DECL_CONTEXT of scalar_type_t which is referenced by
the statement

  D.1506_3 = this_1(D)->vals[0][cha_2(D)];

as the type of the reference.

I wonder why this uses chunk_array_t::scalar_type_t at all.  Hmm.

We build that array-ref in the frontend:

#1  0x00000000006839ef in cp_build_array_ref (loc=2910, array=0x7ffff5b11480, 
    idx=0x7ffff5b10198, complain=3)
    at /space/rguenther/src/svn/trunk/gcc/cp/typeck.c:3039
3039          rval = build4 (ARRAY_REF, type, array, idx, NULL_TREE,
NULL_TREE);

and the array has element type scalar_type_t already.  It's array type
is already built with that element type by

0x00000000007056f8 in build_cplus_array_type (elt_type=0x7ffff5b011f8, 
    index_type=0x7ffff5aeebd0)
    at /space/rguenther/src/svn/trunk/gcc/cp/tree.c:665
665         t = build_array_type (elt_type, index_type);
(gdb) up
#1  0x00000000007064d7 in cp_build_qualified_type_real (type=0x7ffff5aeef18, 
    type_quals=1, complain=7)
    at /space/rguenther/src/svn/trunk/gcc/cp/tree.c:822
822               t = build_cplus_array_type (element_type, TYPE_DOMAIN
(type));
(gdb) up
#2  0x00000000004fb789 in grokdeclarator (declarator=0x1aa2330, 
    declspecs=0x7fffffffd5d0, decl_context=FIELD, initialized=0, 
    attrlist=0x7fffffffd380)
    at /space/rguenther/src/svn/trunk/gcc/cp/decl.c:8322
8322      type = cp_build_qualified_type_real

which is ultimately derived from

#1  0x00000000004f9956 in create_array_type_for_decl (name=0x7ffff5afad68, 
    type=0x7ffff5aee690, size=0x7ffff5ae28c0)
    at /space/rguenther/src/svn/trunk/gcc/cp/decl.c:7640
7640      return build_cplus_array_type (type, itype);
(gdb) up
#2  0x00000000004fc05c in grokdeclarator (declarator=0x1aa2130, 
    declspecs=0x7fffffffd5d0, decl_context=FIELD, initialized=0, 
    attrlist=0x7fffffffd380)
    at /space/rguenther/src/svn/trunk/gcc/cp/decl.c:8525
8525              type = create_array_type_for_decl (dname, type,

which has type of scalar_type_t already.

So - I have no idea how scalar_type_t leaks there ...

Jason?