https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77677
Bug ID: 77677
Summary: ICE at -O1 and above in both 32-bit and 64-bit modes
on x86_64-linux-gnu (internal compiler error: in
set_value_range, at tree-vrp.c:361)
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: ---
If I add "int" in front of "p1", then the crash disappears.
$ 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 20160921 (experimental) [trunk revision 240316] (GCC)
$
$ gcc-trunk -O3 small.c
small.c: In function ‘fn1’:
small.c:2:5: warning: type of ‘p1’ defaults to ‘int’ [-Wimplicit-int]
int fn1(p1) { return p1 == 0 || a % p1; }
^~~
small.c: At top level:
small.c:7:1: internal compiler error: in set_value_range, at tree-vrp.c:361
}
^
0xe61ec8 set_value_range
../../gcc-source-trunk/gcc/tree-vrp.c:360
0xe6542e vrp_meet_1
../../gcc-source-trunk/gcc/tree-vrp.c:8639
0xe6542e vrp_meet(value_range*, value_range const*)
../../gcc-source-trunk/gcc/tree-vrp.c:8716
0x12e9ef5 ipcp_vr_lattice::meet_with_1(value_range const*)
../../gcc-source-trunk/gcc/ipa-cp.c:987
0x12f038c ipcp_vr_lattice::meet_with(value_range const*)
../../gcc-source-trunk/gcc/ipa-cp.c:969
0x12f038c propagate_vr_accross_jump_function
../../gcc-source-trunk/gcc/ipa-cp.c:2077
0x12f038c propagate_constants_accross_call
../../gcc-source-trunk/gcc/ipa-cp.c:2435
0x12f2918 propagate_constants_topo
../../gcc-source-trunk/gcc/ipa-cp.c:3329
0x12f2918 ipcp_propagate_stage
../../gcc-source-trunk/gcc/ipa-cp.c:3439
0x12f4b63 ipcp_driver
../../gcc-source-trunk/gcc/ipa-cp.c:5246
0x12f4b63 execute
../../gcc-source-trunk/gcc/ipa-cp.c:5342
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, b;
int fn1(p1) { return p1 == 0 || a % p1; }
int main() {
b = fn1(2592930443);
return 0;
}
$
