https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90319
Bug ID: 90319
Summary: [C++17] aggregate initialization of base: ICE in
assign_temp
Product: gcc
Version: 10.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: rtl-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: language.lawyer at gmail dot com
Target Milestone: ---
This bug is similar to https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90254, but
here the base is movable.
The following code:
struct B
{
B() = default;
B(B&&) { /* user-provided */ };
};
struct D : B {};
B f() { return {}; }
D a { f() };
triggers ICE in GCC HEAD 10.0.0 2019.04.30 (also reproducible in 8.x.y, 7.z.w):
$ g++ prog.cc -Wall -Wextra -std=c++17 prog.cc
during RTL pass: expand
prog.cc: In function 'void __static_initialization_and_destruction_0(int,
int)':
prog.cc:10:11: internal compiler error: in assign_temp, at function.c:982
10 | D a { f() };
| ^
0x596de0 assign_temp(tree_node*, int, int)
../../source/gcc/function.c:982
0x7b185f expand_call(tree_node*, rtx_def*, int)
../../source/gcc/calls.c:3459
0x8b0236 expand_expr_real_1(tree_node*, rtx_def*, machine_mode,
expand_modifier, rtx_def**, bool)
../../source/gcc/expr.c:11033
0x8bdc73 expand_normal
../../source/gcc/expr.h:285
0x8bdc73 store_field
../../source/gcc/expr.c:7022
0x8bb2d3 expand_assignment(tree_node*, tree_node*, bool)
../../source/gcc/expr.c:5296
0x7bd3d0 expand_call_stmt
../../source/gcc/cfgexpand.c:2722
0x7bd3d0 expand_gimple_stmt_1
../../source/gcc/cfgexpand.c:3691
0x7bd3d0 expand_gimple_stmt
../../source/gcc/cfgexpand.c:3850
0x7c20f7 expand_gimple_basic_block
../../source/gcc/cfgexpand.c:5886
0x7c448e execute
../../source/gcc/cfgexpand.c:6509
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
(https://wandbox.org/permlink/f8QAVgCtSajxfG3L)
! There is no ICE if a positive optimization level (-O1/2/3) is specified !
