[Bug tree-optimization/83337] New: ICE at -O3 x86_64-linux-gnu: in interpret_rhs_expr, at tree-scalar-evolution.c:1775

[su at cs dot ucdavis.edu]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83337

            Bug ID: 83337
           Summary: ICE at -O3 x86_64-linux-gnu: in interpret_rhs_expr, at
                    tree-scalar-evolution.c:1775
           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 very recent regression.

$ 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 20171208 (experimental) [trunk revision 255516] (GCC) 
$ 
$ gcctk -O2 -c small.c
$ gcc-7.2.0 -O3 -c small.c
$ 
$ gcctk -O3 -c small.c
during GIMPLE pass: linterchange
small.c: In function ‘j’:
small.c:9:6: internal compiler error: in interpret_rhs_expr, at
tree-scalar-evolution.c:1775
 void j ()
      ^
0xd6d776 interpret_rhs_expr
        ../../gcc-source-trunk/gcc/tree-scalar-evolution.c:1775
0xd69ac7 interpret_expr
        ../../gcc-source-trunk/gcc/tree-scalar-evolution.c:1991
0xd69ac7 analyze_scalar_evolution_1
        ../../gcc-source-trunk/gcc/tree-scalar-evolution.c:2026
0xd6a741 analyze_scalar_evolution(loop*, tree_node*)
        ../../gcc-source-trunk/gcc/tree-scalar-evolution.c:2113
0x13df932 compute_access_stride
        ../../gcc-source-trunk/gcc/gimple-loop-interchange.cc:1295
0x13df932 compute_access_strides
        ../../gcc-source-trunk/gcc/gimple-loop-interchange.cc:1341
0x13df932 prepare_perfect_loop_nest
        ../../gcc-source-trunk/gcc/gimple-loop-interchange.cc:1963
0x13df932 execute
        ../../gcc-source-trunk/gcc/gimple-loop-interchange.cc:2022
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 A
{
  int b:7;
  int c:7;
} d[2];

int e, h; 

void j ()
{
  for (h = 0; h < 2; h++)
    for (e = 0; e < 2; e++)
      {
        struct A l = { 0, 0 };
        d[e] = l;
      }
}