https://gcc.gnu.org/bugzilla/show_bug.cgi?id=121137
Bug ID: 121137
Summary: ICE on x86_64-linux-gnu: Segmentation fault with omp
Product: gcc
Version: 16.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: jiangchangwu at smail dot nju.edu.cn
Target Milestone: ---
Compiler Explorer: https://gcc.godbolt.org/z/b6scqTsTs
*******************************************************************************
gcc version:
Using built-in specs.
COLLECT_GCC=gcc-trunk
COLLECT_LTO_WRAPPER=/home/software/gcc-trunk/libexec/gcc/x86_64-pc-linux-gnu/16.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../gcc/configure --disable-multilib --disable-bootstrap
--enable-languages=c,c++ --prefix=/home/software/gcc-trunk --enable-coverage
--disable-werror --enable-checking=yes
Thread model: posix
Supported LTO compression algorithms: zlib
gcc version 16.0.0 20250613 (experimental) (GCC)
*******************************************************************************
Program:
$ cat mutant.c
void e(int c, struct {char a[c];} b) {
int d;
#pragma omp parallel reduction(+ : d)
b;
}
*******************************************************************************
Command Lines:
$ gcc -std=gnu17 -fopenmp mutant.c
mutant.c:1:15: warning: anonymous struct declared inside parameter list will
not be visible outside of this definition or declaration
1 | void e(int c, struct {char a[c];} b) {
| ^~~~~~
mutant.c: In function 'e':
mutant.c:4:3: internal compiler error: Segmentation fault
4 | b;
| ^
0x5554b38 internal_error(char const*, ...)
../../gcc/gcc/diagnostic-global-context.cc:517
0x21651ec crash_signal
../../gcc/gcc/toplev.cc:321
0x192e239 omp_add_variable
../../gcc/gcc/gimplify.cc:8626
0x1931a0a omp_notice_variable
../../gcc/gcc/gimplify.cc:9299
0x190bf4b gimplify_var_or_parm_decl
../../gcc/gcc/gimplify.cc:3354
0x1989d4b gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*),
int)
../../gcc/gcc/gimplify.cc:20256
0x192d3dc gimplify_stmt(tree_node**, gimple**)
../../gcc/gcc/gimplify.cc:8461
0x19019d2 gimplify_bind_expr
../../gcc/gcc/gimplify.cc:1683
0x1987d70 gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*),
int)
../../gcc/gcc/gimplify.cc:19990
0x192d3dc gimplify_stmt(tree_node**, gimple**)
../../gcc/gcc/gimplify.cc:8461
0x18fa5f2 gimplify_and_add(tree_node*, gimple**)
../../gcc/gcc/gimplify.cc:550
0x18fa674 gimplify_and_return_first
../../gcc/gcc/gimplify.cc:562
0x1963e05 gimplify_omp_parallel
../../gcc/gcc/gimplify.cc:16107
0x1989fd9 gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*),
int)
../../gcc/gcc/gimplify.cc:20288
0x192d3dc gimplify_stmt(tree_node**, gimple**)
../../gcc/gcc/gimplify.cc:8461
0x19058ab gimplify_statement_list
../../gcc/gcc/gimplify.cc:2288
0x1989bd9 gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*),
int)
../../gcc/gcc/gimplify.cc:20240
0x192d3dc gimplify_stmt(tree_node**, gimple**)
../../gcc/gcc/gimplify.cc:8461
0x19019d2 gimplify_bind_expr
../../gcc/gcc/gimplify.cc:1683
0x1987d70 gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*),
int)
../../gcc/gcc/gimplify.cc:19990
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.
