[Bug tree-optimization/66280] [4.8/4.9/5/6 Regression] ICE: in vect_get_vec_def_for_operand, at tree-vect-stmts.c:1472

[trippels at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66280

Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2015-05-25
                 CC|                            |trippels at gcc dot gnu.org
            Summary|internal compiler error: in |[4.8/4.9/5/6 Regression]
                   |vect_get_vec_def_for_operan |ICE: in
                   |d, at                       |vect_get_vec_def_for_operan
                   |tree-vect-stmts.c:1322      |d, at
                   |                            |tree-vect-stmts.c:1472
     Ever confirmed|0                           |1

--- Comment #1 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
markus@x4 tmp % cat repro.ii
typedef struct
{
  short re;
  short im;
} cint16_T;
typedef struct
{
  int re;
  int im;
} cint32_T;
int a;
short b;
cint16_T *c;
cint32_T *d, *e;
void
fn1 ()
{
  for (; a; a++)
    {
      d[a].re = d[a].im = e[a].re = c[a].re * b;
      e[a].im = c[a].im * b;
    }
}

markus@x4 tmp % g++ -c -O3 repro.ii
repro.ii: In function ‘void fn1()’:
repro.ii:16:1: internal compiler error: in vect_get_vec_def_for_operand, at
tree-vect-stmts.c:1472
 fn1 ()
  ^
0xe98c19 vect_get_vec_def_for_operand(tree_node*, gimple_statement_base*,
tree_node**)
        ../../gcc/gcc/tree-vect-stmts.c:1472
0xea1273 vectorizable_store
        ../../gcc/gcc/tree-vect-stmts.c:5330
0xeab8f0 vect_transform_stmt(gimple_statement_base*, gimple_stmt_iterator*,
bool*, _slp_tree*, _slp_instance*)
        ../../gcc/gcc/tree-vect-stmts.c:7345
0xeb0d84 vect_transform_loop(_loop_vec_info*)
        ../../gcc/gcc/tree-vect-loop.c:6185
0xecbe82 vectorize_loops()
        ../../gcc/gcc/tree-vectorizer.c:502
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