[Bug 139] GDC writes all-zero initialisers in the rodata section

[via D.gnu]

http://bugzilla.gdcproject.org/show_bug.cgi?id=139

--- Comment #10 from Johannes Pfau <johannesp...@gmail.com> ---
Reverting this change exposes a test failure in phobos. However every seemingly
unrelated change hides the error. gcc-4.9 works fine. So I wonder whether this
is actually a bug in the GCC-5 snapshot?

Here's the reduced test case:
----------------
import core.stdc.string;

void test()
{
    struct S { @disable this();}
    S s = void;
    emplaceInitializer(&s);
}

T* emplaceInitializer(T)(T* chunk)
{
    static immutable init = T.init;
    memcpy(chunk, &init, T.sizeof);
    return chunk;
}
----------------
gdc conv.d -c

(sorry, forgot to change language)
----------------
conv.d: In Funktion »emplaceInitializer«:
conv.d:11: Fehler: nicht-triviale Umwandlung bei Zuweisung
ulong
void *
MEM[(unsigned char * {ref-all})chunk] = D.2533;
conv.d:11: interner Compiler-Fehler: verify_gimple gescheitert
0xb2dc8f verify_gimple_in_seq(gimple_statement_base*)
    ../../gcc-5-20140831/gcc/tree-cfg.c:4672
0x930759 gimplify_body(tree_node*, bool)
    ../../gcc-5-20140831/gcc/gimplify.c:8847
0x930b16 gimplify_function_tree(tree_node*)
    ../../gcc-5-20140831/gcc/gimplify.c:8932
0x7a94b7 cgraph_node::analyze()
    ../../gcc-5-20140831/gcc/cgraphunit.c:612
0x7abdad analyze_functions
    ../../gcc-5-20140831/gcc/cgraphunit.c:988
0x7ac515 symbol_table::finalize_compilation_unit()
    ../../gcc-5-20140831/gcc/cgraphunit.c:2277
0x6f487e d_finish_compilation(tree_node**, int)
    ../../gcc-5-20140831/gcc/d/d-objfile.cc:1947
----------------

----------------
{
  void * D.2533;
  struct S * D.2534;

  D.2533 = {};
  MEM[(unsigned char * {ref-all})chunk] = D.2533;
  D.2534 = chunk;
  return D.2534;
}
----------------

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