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[Bug tree-optimization/80443] New: ICE on valid code at -O2 on x86_64-linux-gnu: in set_value_range, at tree-vrp.c:367
- From: "su at cs dot ucdavis.edu" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Mon, 17 Apr 2017 06:48:42 +0000
- Subject: [Bug tree-optimization/80443] New: ICE on valid code at -O2 on x86_64-linux-gnu: in set_value_range, at tree-vrp.c:367
- Auto-submitted: auto-generated
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80443
Bug ID: 80443
Summary: ICE on valid code at -O2 on x86_64-linux-gnu: in
set_value_range, at tree-vrp.c:367
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: su at cs dot ucdavis.edu
Target Milestone: ---
This appears to be a recent regression.
$ 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/7.0.1/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 7.0.1 20170417 (experimental) [trunk revision 246948] (GCC)
$
$ gcc-trunk -Os -c small.c
$
$ gcc-trunk -O2 -c small.c
small.c: In function ‘fn1’:
small.c:8:6: internal compiler error: in set_value_range, at tree-vrp.c:367
void fn1 ()
^~~
0xebf2a0 set_value_range
../../gcc-source-trunk/gcc/tree-vrp.c:367
0xebfd7b vrp_intersect_ranges_1
../../gcc-source-trunk/gcc/tree-vrp.c:8995
0xebfd7b vrp_intersect_ranges(value_range*, value_range*)
../../gcc-source-trunk/gcc/tree-vrp.c:9029
0xec31a3 update_value_range
../../gcc-source-trunk/gcc/tree-vrp.c:793
0xed5406 vrp_visit_phi_node
../../gcc-source-trunk/gcc/tree-vrp.c:9362
0xddaa28 simulate_stmt
../../gcc-source-trunk/gcc/tree-ssa-propagate.c:237
0xddc4f7 simulate_block
../../gcc-source-trunk/gcc/tree-ssa-propagate.c:363
0xddc4f7 ssa_propagate(ssa_prop_result (*)(gimple*, edge_def**, tree_node**),
ssa_prop_result (*)(gphi*))
../../gcc-source-trunk/gcc/tree-ssa-propagate.c:808
0xedddc1 execute_vrp
../../gcc-source-trunk/gcc/tree-vrp.c:11680
0xedddc1 execute
../../gcc-source-trunk/gcc/tree-vrp.c:11778
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
$
---------------------------------------
struct
{
int a:1;
} b, c;
char d, e, f;
void fn1 ()
{
while (f)
{
char g = b.a;
if (g)
b.a = ~(1 + (d || c.a));
if (b.a < g && b.a)
g = 0;
if (b.a > c.a)
b.a = g;
c.a = e;
}
}