https://gcc.gnu.org/bugzilla/show_bug.cgi?id=117065
Bug ID: 117065
Summary: ICE: tree check: expected class 'type', have
'exceptional' (error_mark) in
type_has_padding_at_level_p, at gimple-fold.cc:4820
Product: gcc
Version: 15.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: iamanonymous.cs at gmail dot com
Target Milestone: ---
*******************************************************************************
The compiler produces an internal error during tree_to_poly_int64 when
compiling the provided code with the specified options.
The issue can also be reproduced on Compiler Explorer.
*******************************************************************************
OS and Platform:
# uname -a
Linux ubuntu 4.15.0-213-generic #224-Ubuntu SMP Mon Jun 19 13:30:12 UTC 2023
x86_64 x86_64 x86_64 GNU/Linux
*******************************************************************************
# gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/root/gdbtest/gcc/gcc-241009/libexec/gcc/x86_64-pc-linux-gnu/15.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../gcc/configure --prefix=/root/gdbtest/gcc/gcc-241009
--enable-languages=c,c++ --disable-multilib --disable-bootstrap
Thread model: posix
Supported LTO compression algorithms: zlib
gcc version 15.0.0 20241009 (experimental) (GCC)
*******************************************************************************
Program:
# cat bugreport_0_1.c
// struct B {int n;};
typedef unsigned long long A;
typedef union
{
struct B s;
A a;
} U;
void f (A x, unsigned int b)
{
const U y = {.a = x};
}
*******************************************************************************
Command Lines:
# gcc bugreport_0_1.c -O0 -Wall -Wextra -Wpedantic -Wconversion -Wshadow
-Wcast-align -Wstrict-aliasing -Wuninitialized -c
bugreport_0_1.c:5:12: error: field ‘s’ has incomplete type
5 | struct B s;
| ^
bugreport_0_1.c: In function ‘f’:
bugreport_0_1.c:10:11: warning: unused variable ‘y’ [-Wunused-variable]
10 | const U y = {.a = x};
| ^
bugreport_0_1.c:8:27: warning: unused parameter ‘b’ [-Wunused-parameter]
8 | void f (A x, unsigned int b)
| ~~~~~~~~~~~~~^
bugreport_0_1.c:10:11: internal compiler error: tree check: expected class
‘type’, have ‘exceptional’ (error_mark) in type_has_padding_at_level_p, at
gimple-fold.cc:4820
10 | const U y = {.a = x};
| ^
0x260066e internal_error(char const*, ...)
../../gcc/gcc/diagnostic-global-context.cc:517
0x8ee210 tree_class_check_failed(tree_node const*, tree_code_class, char
const*, int, char const*)
../../gcc/gcc/tree.cc:9053
0x8136bb tree_class_check(tree_node*, tree_code_class, char const*, int, char
const*)
../../gcc/gcc/tree.h:3788
0x8136bb type_has_padding_at_level_p(tree_node*)
../../gcc/gcc/gimple-fold.cc:4820
0xcc8652 categorize_ctor_elements_1
../../gcc/gcc/expr.cc:7223
0xdd1767 gimplify_init_constructor
../../gcc/gcc/gimplify.cc:5595
0xdd442c gimplify_modify_expr
../../gcc/gcc/gimplify.cc:6495
0xdbef43 gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*),
int)
../../gcc/gcc/gimplify.cc:18141
0xdc16e4 gimplify_stmt(tree_node**, gimple**)
../../gcc/gcc/gimplify.cc:7662
0xdd640e gimplify_and_add(tree_node*, gimple**)
../../gcc/gcc/gimplify.cc:516
0xdd640e gimplify_decl_expr
../../gcc/gcc/gimplify.cc:2171
0xdbf26a gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*),
int)
../../gcc/gcc/gimplify.cc:18338
0xdc16e4 gimplify_stmt(tree_node**, gimple**)
../../gcc/gcc/gimplify.cc:7662
0xdc2917 gimplify_bind_expr
../../gcc/gcc/gimplify.cc:1649
0xdbf6d3 gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*),
int)
../../gcc/gcc/gimplify.cc:18342
0xdc919e gimplify_stmt(tree_node**, gimple**)
../../gcc/gcc/gimplify.cc:7662
0xdc919e gimplify_body(tree_node*, bool)
../../gcc/gcc/gimplify.cc:19420
0xdc95e0 gimplify_function_tree(tree_node*)
../../gcc/gcc/gimplify.cc:19621
0xbe6ba7 cgraph_node::analyze()
../../gcc/gcc/cgraphunit.cc:687
0xbe9807 analyze_functions
../../gcc/gcc/cgraphunit.cc:1251
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.
*******************************************************************************
Also ICE on trunk, compiler explorer:https://godbolt.org/z/T6azsn9qT
*******************************************************************************
