https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71407
Bug ID: 71407
Summary: ICE at -O3 in 32-bit and 64-bit modes on
x86_64-linux-gnu (verify_gimple: integral result type
precision does not match field size of BIT_FIELD_REF)
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: chengniansun at gmail dot com
Target Milestone: ---
$: gcc-trunk -v
Using built-in specs.
COLLECT_GCC=gcc-trunk
COLLECT_LTO_WRAPPER=/usr/local/gcc-trunk/libexec/gcc/x86_64-pc-linux-gnu/7.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../gcc-source-trunk/configure --enable-languages=c,c++,lto
--prefix=/usr/local/gcc-trunk --disable-bootstrap
Thread model: posix
gcc version 7.0.0 20160603 (experimental) [trunk revision 237082] (GCC)
$:
$: gcc-trunk -O3 small.c -w
small.c: In function ‘fn2’:
small.c:6:6: error: integral result type precision does not match field size of
BIT_FIELD_REF
void fn2() {
^~~
BIT_FIELD_REF <mask__22.25_75, 8, 120>
cc1: note: in statement
_70 = BIT_FIELD_REF <mask__22.25_75, 8, 120>;
small.c:6:6: internal compiler error: verify_gimple failed
0xbf0a26 verify_gimple_in_cfg(function*, bool)
../../gcc-source-trunk/gcc/tree-cfg.c:5211
0xaddd7a execute_function_todo
../../gcc-source-trunk/gcc/passes.c:1964
0xade7fb execute_todo
../../gcc-source-trunk/gcc/passes.c:2016
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://gcc.gnu.org/bugs.html> for instructions.
$:
$: cat small.c
int a, d;
char b;
short c;
short fn1() {}
void fn2() {
int e;
for (; c; c++) {
for (; a; a++)
b = fn1() || e;
e = d;
}
}
int main() {}
$:
