https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112504
Bug ID: 112504
Summary: gcc: 14: internal compiler error: in operand_equal_p,
at fold-const.cc:3313
Product: gcc
Version: 14.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: 141242068 at smail dot nju.edu.cn
Target Milestone: ---
Compiler Explorer: https://gcc.godbolt.org/z/YdETsKzeb
When compiling this program with `gcc-14 -O0`, gcc crashes:
```
struct s {
char c[1];
};
extern struct s foo(void);
void bar(void) {
foo().c == foo().c;
}
```
The crash output:
```
<source>: In function 'bar':
<source>:6:3: internal compiler error: in operand_equal_p, at
fold-const.cc:3313
6 | foo().c == foo().c;
| ^~~
0x238b15e internal_error(char const*, ...)
???:0
0xa11270 fancy_abort(char const*, int, char const*)
???:0
0xd0bd67 operand_compare::operand_equal_p(tree_node const*, tree_node const*,
unsigned int)
???:0
0xd0b6e4 operand_compare::operand_equal_p(tree_node const*, tree_node const*,
unsigned int)
???:0
0xd25837 fold_binary_loc(unsigned int, tree_code, tree_node*, tree_node*,
tree_node*)
???:0
0xd45c84 fold(tree_node*)
???:0
0xac0aef c_fully_fold(tree_node*, bool, bool*, bool)
???:0
0xa574e3 c_process_expr_stmt(unsigned int, tree_node*)
???:0
0xa57711 c_finish_expr_stmt(unsigned int, tree_node*)
???:0
0xabd40d c_parse_file()
???:0
0xb30909 c_common_parse_file()
???:0
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.
Compiler returned: 1
```
