[Bug tree-optimization/77677] [7 Regression] 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)

["su at cs dot ucdavis.edu" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77677

Zhendong Su <su at cs dot ucdavis.edu> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |su at cs dot ucdavis.edu

--- Comment #2 from Zhendong Su <su at cs dot ucdavis.edu> ---
Here is another test that triggers the same ICE: 

$ 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 240310] (GCC)
$
$ gcc-trunk -Os small.c
small.c:15:1: internal compiler error: in set_value_range, at tree-vrp.c:361
 }
 ^
0xe70f86 set_value_range
        ../../gcc-source-trunk/gcc/tree-vrp.c:360
0xe738f7 vrp_meet_1
        ../../gcc-source-trunk/gcc/tree-vrp.c:8639
0xe738f7 vrp_meet(value_range*, value_range const*)
        ../../gcc-source-trunk/gcc/tree-vrp.c:8716
0x13001e5 ipcp_vr_lattice::meet_with_1(value_range const*)
        ../../gcc-source-trunk/gcc/ipa-cp.c:987
0x1305e54 ipcp_vr_lattice::meet_with(value_range const*)
        ../../gcc-source-trunk/gcc/ipa-cp.c:969
0x1305e54 propagate_vr_accross_jump_function
        ../../gcc-source-trunk/gcc/ipa-cp.c:2072
0x1305e54 propagate_constants_accross_call
        ../../gcc-source-trunk/gcc/ipa-cp.c:2435
0x1307990 propagate_constants_topo
        ../../gcc-source-trunk/gcc/ipa-cp.c:3329
0x1307990 ipcp_propagate_stage
        ../../gcc-source-trunk/gcc/ipa-cp.c:3439
0x1309f03 ipcp_driver
        ../../gcc-source-trunk/gcc/ipa-cp.c:5246
0x1309f03 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;

static void fn1 (short p1)
{ 
  a = -p1;
  if (a || b)
    __builtin_printf ("%d\n", b);
}

int main ()
{ 
  int c[] = { 40000 };
  fn1 (c[0]);
  return 0;
}
$