[Bug tree-optimization/82289] New: ICE at -O3 on x86_64-linux-gnu: in vect_get_num_copies, at tree-vectorizer.h:1093

[su at cs dot ucdavis.edu]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82289

            Bug ID: 82289
           Summary: ICE at -O3 on x86_64-linux-gnu: in
                    vect_get_num_copies, at tree-vectorizer.h:1093
           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: ---

$ gcctk -v
Using built-in specs.
COLLECT_GCC=gcctk
COLLECT_LTO_WRAPPER=/home/su/software/tmp/gcc/gcc-trunk/libexec/gcc/x86_64-pc-linux-gnu/8.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../gcc-source-trunk/configure --enable-languages=c,c++,lto
--prefix=/home/su/software/tmp/gcc/gcc-trunk --disable-bootstrap
Thread model: posix
gcc version 8.0.0 20170921 (experimental) [trunk revision 253084] (GCC)
$
$ gcctk -O2 -c small.c
$
$ gcctk -O3 -c small.c
during GIMPLE pass: vect
small.c: In function ‘fn1’:
small.c:3:6: internal compiler error: in vect_get_num_copies, at
tree-vectorizer.h:1093
 void fn1 (int *j)
      ^~~
0x14b2236 vect_get_num_copies
        ../../gcc-source-trunk/gcc/tree-vectorizer.h:1092
0x14b2236 vect_get_data_access_cost
        ../../gcc-source-trunk/gcc/tree-vect-data-refs.c:1195
0x14b2236 vect_get_peeling_costs_all_drs
        ../../gcc-source-trunk/gcc/tree-vect-data-refs.c:1339
0x14bf48e vect_enhance_data_refs_alignment(_loop_vec_info*)
        ../../gcc-source-trunk/gcc/tree-vect-data-refs.c:1797
0xefe706 vect_analyze_loop_2
        ../../gcc-source-trunk/gcc/tree-vect-loop.c:2018
0xefe706 vect_analyze_loop(loop*, _loop_vec_info*)
        ../../gcc-source-trunk/gcc/tree-vect-loop.c:2354
0xf170e5 vectorize_loops()
        ../../gcc-source-trunk/gcc/tree-vectorizer.c:685
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.
$


-------------------------------------


int a, b, c, *d, *f[1];

void fn1 (int *j)
{ 
  int e, g, h = 1;
  for (; e; e++)
    { 
      if (g > 0)
        { 
          d = j;
          return;
        }
      if (!h)
        while (g)
          ;
      while (h < 1)
        if (a)
          { 
            fn1 (&h);
            h = 0;
          }
      f[e] = &c;
    }
  while (1)
    ;
}