https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110737
Bug ID: 110737
Summary: GCC: internal compiler error: Segmentation fault when
processing __builtin_isinf and _Atomic long double
together
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: ---
When attempting to compile below program using gcc-14 with option `gcc-14
small.c`, gcc throws internal error.
```
_Atomic long double c;
void f(void);
void g(void) { __builtin_isinf(c /= f()); }
```
The output of gcc is pasted below:
```
<source>: In function 'g':
<source>:3:1: error: void value not ignored as it ought to be
3 | void g(void) { __builtin_isinf(c /= f()); }
| ^~~~
<source>:3:34: internal compiler error: Segmentation fault
3 | void g(void) { __builtin_isinf(c /= f()); }
| ^~
0x21594ee internal_error(char const*, ...)
???:0
0xd6ec47 gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*),
int)
???:0
0xd7182a gimplify_stmt(tree_node**, gimple**)
???:0
0xd6f79b gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*),
int)
???:0
0xd7182a gimplify_stmt(tree_node**, gimple**)
???:0
0xd6ec6a gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*),
int)
???:0
0xd7182a gimplify_stmt(tree_node**, gimple**)
???:0
0xd6ec04 gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*),
int)
???:0
0xd7182a gimplify_stmt(tree_node**, gimple**)
???:0
0xd72cc3 gimplify_body(tree_node*, bool)
???:0
0xd7311f gimplify_function_tree(tree_node*)
???:0
0xbaffa7 cgraph_node::analyze()
???:0
0xbb3af1 symbol_table::finalize_compilation_unit()
???: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.
```
The above segment fault can be verified at compiler explorer:
https://gcc.godbolt.org/z/Ghxe5Mc6e
