https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83490
--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
--- gcc/calls.c.jj 2017-12-18 14:57:24.000000000 +0100
+++ gcc/calls.c 2017-12-19 19:46:40.466045457 +0100
@@ -2382,7 +2382,12 @@ compute_argument_addresses (struct arg_d
args[i].stack = gen_rtx_MEM (partial_mode, addr);
set_mem_size (args[i].stack, units_on_stack);
}
- else
+ else if (TYPE_EMPTY_P (TREE_TYPE (args[i].tree_value)))
+ {
+ args[i].stack = gen_rtx_MEM (BLKmode, addr);
+ set_mem_size (args[i].stack, 0);
+ }
+ else
{
args[i].stack = gen_rtx_MEM (args[i].mode, addr);
set_mem_attributes (args[i].stack,
avoids the ICE. But I think I prefer:
--- gcc/calls.c.jj 2017-12-18 14:57:24.000000000 +0100
+++ gcc/calls.c 2017-12-19 20:25:00.143659975 +0100
@@ -2365,6 +2365,9 @@ compute_argument_addresses (struct arg_d
&& args[i].partial == 0)
continue;
+ if (TYPE_EMPTY_P (TREE_TYPE (args[i].tree_value)))
+ continue;
+
/* Pointer Bounds are never passed on the stack. */
if (POINTER_BOUNDS_P (args[i].tree_value))
continue;
which I'll bootstrap/regtest together with the testcase momentarily.
