https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110117
Bug ID: 110117
Summary: ICE on valid code at -O1 with "": verify_ssa failed
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: zhendong.su at inf dot ethz.ch
Target Milestone: ---
It appears to be a recent regression.
Compiler Explorer: https://godbolt.org/z/fsxExbW9P
[584] % gcctk -v
Using built-in specs.
COLLECT_GCC=gcctk
COLLECT_LTO_WRAPPER=/local/home/suz/suz-local/software/local/gcc-trunk/bin/../libexec/gcc/x86_64-pc-linux-gnu/14.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../gcc-trunk/configure --disable-bootstrap
--enable-checking=yes --prefix=/local/suz-local/software/local/gcc-trunk
--enable-sanitizers --enable-languages=c,c++ --disable-werror
--disable-multilib
Thread model: posix
Supported LTO compression algorithms: zlib
gcc version 14.0.0 20230604 (experimental) [master r14-924-gd709841ae0f] (GCC)
[585] %
[585] % gcctk -O1 -ftree-vrp -fno-tree-ccp -fno-tree-forwprop small.c
during RTL pass: expand
small.c: In function ‘main’:
small.c:9:12: internal compiler error: in as_a, at machmode.h:381
9 | c = ~h - (-g & f || e);
| ~~~^~~~~~~~~~~~~~~
0x7564c4 scalar_int_mode as_a<scalar_int_mode>(machine_mode)
../../gcc-trunk/gcc/machmode.h:381
0x758382 scalar_int_mode as_a<scalar_int_mode>(machine_mode)
../../gcc-trunk/gcc/tree.h:3669
0x758382 expand_single_bit_test
../../gcc-trunk/gcc/expr.cc:12914
0x758382 do_store_flag
../../gcc-trunk/gcc/expr.cc:13173
0xbbd259 expand_expr_real_2(separate_ops*, rtx_def*, machine_mode,
expand_modifier)
../../gcc-trunk/gcc/expr.cc:10251
0xbc4ccd expand_expr_real_1(tree_node*, rtx_def*, machine_mode,
expand_modifier, rtx_def**, bool)
../../gcc-trunk/gcc/expr.cc:10800
0xbc7324 expand_expr(tree_node*, rtx_def*, machine_mode, expand_modifier)
../../gcc-trunk/gcc/expr.h:310
0xbc7324 expand_operands(tree_node*, tree_node*, rtx_def*, rtx_def**,
rtx_def**, expand_modifier)
../../gcc-trunk/gcc/expr.cc:8577
0xbbcd0a expand_expr_real_2(separate_ops*, rtx_def*, machine_mode,
expand_modifier)
../../gcc-trunk/gcc/expr.cc:10591
0xbc4ccd expand_expr_real_1(tree_node*, rtx_def*, machine_mode,
expand_modifier, rtx_def**, bool)
../../gcc-trunk/gcc/expr.cc:10800
0xbbd57a expand_expr_real(tree_node*, rtx_def*, machine_mode, expand_modifier,
rtx_def**, bool)
../../gcc-trunk/gcc/expr.cc:8999
0xbbd57a expand_expr(tree_node*, rtx_def*, machine_mode, expand_modifier)
../../gcc-trunk/gcc/expr.h:310
0xbbd57a expand_expr_real_2(separate_ops*, rtx_def*, machine_mode,
expand_modifier)
../../gcc-trunk/gcc/expr.cc:9334
0xbc4ccd expand_expr_real_1(tree_node*, rtx_def*, machine_mode,
expand_modifier, rtx_def**, bool)
../../gcc-trunk/gcc/expr.cc:10800
0xbc733c expand_expr(tree_node*, rtx_def*, machine_mode, expand_modifier)
../../gcc-trunk/gcc/expr.h:310
0xbc733c expand_operands(tree_node*, tree_node*, rtx_def*, rtx_def**,
rtx_def**, expand_modifier)
../../gcc-trunk/gcc/expr.cc:8578
0xbbcd0a expand_expr_real_2(separate_ops*, rtx_def*, machine_mode,
expand_modifier)
../../gcc-trunk/gcc/expr.cc:10591
0xbc4ccd expand_expr_real_1(tree_node*, rtx_def*, machine_mode,
expand_modifier, rtx_def**, bool)
../../gcc-trunk/gcc/expr.cc:10800
0xbc185e expand_expr_real(tree_node*, rtx_def*, machine_mode, expand_modifier,
rtx_def**, bool)
../../gcc-trunk/gcc/expr.cc:8999
0xbc185e expand_expr(tree_node*, rtx_def*, machine_mode, expand_modifier)
../../gcc-trunk/gcc/expr.h:310
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.
[586] %
[586] % cat small.c
int a, b, d;
unsigned c;
int main() {
char e = -10;
int f = 1, g = 0;
if (a) {
char h = e;
i:
c = ~h - (-g & f || e);
int j = b % c;
g = j % 9;
if (c) {
if (d)
e = 0;
while (!g)
;
int k = 0;
l:
if (k)
goto i;
}
}
if (e > -10) {
if (g)
f = 0;
goto l;
}
return 0;
}
