[Bug sanitizer/105093] New: ICE in expand_expr_addr_expr_1, at expr.c:7607 since r6-3529-gf11a7b6d57f6fcba

["marxin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105093

            Bug ID: 105093
           Summary: ICE in expand_expr_addr_expr_1, at expr.c:7607 since
                    r6-3529-gf11a7b6d57f6fcba
           Product: gcc
           Version: 12.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: sanitizer
          Assignee: unassigned at gcc dot gnu.org
          Reporter: marxin at gcc dot gnu.org
                CC: aoliva at gcc dot gnu.org, dodji at gcc dot gnu.org,
                    dvyukov at gcc dot gnu.org, jakub at gcc dot gnu.org,
                    kcc at gcc dot gnu.org, marxin at gcc dot gnu.org
  Target Milestone: ---

The following crashes:

$ cat nrvo.cpp
struct X {
  X();
  ~X();
};
volatile X test21() {
  X x;
  return x;
}

$ g++ nrvo.cpp -c -O2 -fsanitize=undefined -c
during RTL pass: expand
nrvo.cpp: In function ‘volatile X test21()’:
nrvo.cpp:5:12: internal compiler error: in expand_expr_addr_expr_1, at
expr.cc:8435
    5 | volatile X test21() {
      |            ^~~~~~
0x7ea241 expand_expr_addr_expr_1
        /home/marxin/Programming/gcc/gcc/expr.cc:8435
0xe95b46 expand_expr_addr_expr
        /home/marxin/Programming/gcc/gcc/expr.cc:8548
0xe95b46 expand_expr_real_1(tree_node*, rtx_def*, machine_mode,
expand_modifier, rtx_def**, bool)
        /home/marxin/Programming/gcc/gcc/expr.cc:11767
0xe927fc expand_expr
        /home/marxin/Programming/gcc/gcc/expr.h:301
0xe927fc expand_expr_real_2(separate_ops*, rtx_def*, machine_mode,
expand_modifier)
        /home/marxin/Programming/gcc/gcc/expr.cc:9057
0xe96da6 expand_expr_real_1(tree_node*, rtx_def*, machine_mode,
expand_modifier, rtx_def**, bool)
        /home/marxin/Programming/gcc/gcc/expr.cc:10504
0xe99414 expand_expr
        /home/marxin/Programming/gcc/gcc/expr.h:301
0xe99414 expand_operands(tree_node*, tree_node*, rtx_def*, rtx_def**,
rtx_def**, expand_modifier)
        /home/marxin/Programming/gcc/gcc/expr.cc:8314
0xe8fb82 expand_expr_real_2(separate_ops*, rtx_def*, machine_mode,
expand_modifier)
        /home/marxin/Programming/gcc/gcc/expr.cc:9281
0xe96da6 expand_expr_real_1(tree_node*, rtx_def*, machine_mode,
expand_modifier, rtx_def**, bool)
        /home/marxin/Programming/gcc/gcc/expr.cc:10504
0xe99414 expand_expr
        /home/marxin/Programming/gcc/gcc/expr.h:301
0xe99414 expand_operands(tree_node*, tree_node*, rtx_def*, rtx_def**,
rtx_def**, expand_modifier)
        /home/marxin/Programming/gcc/gcc/expr.cc:8314
0xe8f8b2 expand_expr_real_2(separate_ops*, rtx_def*, machine_mode,
expand_modifier)
        /home/marxin/Programming/gcc/gcc/expr.cc:10295
0xd626c5 expand_gimple_stmt_1
        /home/marxin/Programming/gcc/gcc/cfgexpand.cc:3972
0xd626c5 expand_gimple_stmt
        /home/marxin/Programming/gcc/gcc/cfgexpand.cc:4033
0xd684f4 expand_gimple_basic_block
        /home/marxin/Programming/gcc/gcc/cfgexpand.cc:6080
0xd6a6c7 execute
        /home/marxin/Programming/gcc/gcc/cfgexpand.cc:6806
Please submit a full bug report, with preprocessed source (by using
-freport-bug).
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.