[Bug c++/79085] ICE with placement new to unaligned location

[msebor at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79085

Martin Sebor <msebor at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |msebor at gcc dot gnu.org

--- Comment #2 from Martin Sebor <msebor at gcc dot gnu.org> ---
The ICE is still present on this week's trunk.  The following is a reduced test
case:

$ cat y.C && arm-eabi-gcc -Os -Wall -c y.C
void* operator new (__SIZE_TYPE__, void *p) { return p; }

struct M
{
  ~M (void);

  int i;
};

M create();

static char buf [sizeof (M)];

M* fn (void)
{
  return new (buf) M (create ());
}
y.C: In function ‘M* fn()’:
y.C:16:32: internal compiler error: in assign_temp, at function.c:968
   return new (buf) M (create ());
                                ^
0xe17a50 assign_temp(tree_node*, int, int)
        /src/gcc/trunk/gcc/function.c:968
0xbd4fa4 expand_call(tree_node*, rtx_def*, int)
        /src/gcc/trunk/gcc/calls.c:3136
0xdac857 expand_expr_real_1(tree_node*, rtx_def*, machine_mode,
expand_modifier, rtx_def**, bool)
        /src/gcc/trunk/gcc/expr.c:10825
0xd9fa31 expand_expr_real(tree_node*, rtx_def*, machine_mode, expand_modifier,
rtx_def**, bool)
        /src/gcc/trunk/gcc/expr.c:8072
0xd94de7 store_expr_with_bounds(tree_node*, rtx_def*, int, bool, bool,
tree_node*)
        /src/gcc/trunk/gcc/expr.c:5552
0xd9397f expand_assignment(tree_node*, tree_node*, bool)
        /src/gcc/trunk/gcc/expr.c:5321
0xbf0376 expand_call_stmt
        /src/gcc/trunk/gcc/cfgexpand.c:2656
0xbf40f7 expand_gimple_stmt_1
        /src/gcc/trunk/gcc/cfgexpand.c:3571
0xbf4863 expand_gimple_stmt
        /src/gcc/trunk/gcc/cfgexpand.c:3737
0xbfd213 expand_gimple_basic_block
        /src/gcc/trunk/gcc/cfgexpand.c:5744
0xbfea84 execute
        /src/gcc/trunk/gcc/cfgexpand.c:6357
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