[Bug target/25833] New: ICE with -O -ftree-vectorize -funroll-loops

[kkojima at gcc dot gnu dot org]

On sh64-elf, the program

void
foo (float *dest_y, const float *abase_n, float bbase_yn,
     int count, int xcount, int ycount)
{
  int x, y, n;

  for (y = 0; y < ycount; y++)
    for (n = 0; n < count; n++)
      for (x = 0; x < xcount; x++)
        dest_y[x] += abase_n[x] * bbase_yn;
}

causes the ICE

foo.c:11: error: unrecognizable insn:
(insn 117 116 118 5 (set (reg:V2SF 300)
        (vec_select:V2SF (vec_concat:V2SF (vec_select:SF (reg:V2SF 232)
                    (parallel [
                            (const_int 1 [0x1])
                        ]))
                (mult:SF (vec_select:SF (reg:V2SF 209 [ vect_cst_.50 ])
                        (parallel [
                                (const_int 0 [0x0])
                            ]))
                    (vec_select:SF (reg:V2SF 233)
                        (parallel [
                                (const_int 0 [0x0])
                            ]))))
            (parallel [
                    (const_int 1 [0x1])
                    (const_int 0 [0x0])
                ]))) -1 (insn_list:REG_DEP_TRUE 116 (nil))
    (expr_list:REG_DEAD (reg:V2SF 232)
        (nil)))
foo.c:11: internal compiler error: in extract_insn, at recog.c:2084

on 4.2 compiler with -O -ftree-vectorize -funroll-loops.


-- 
           Summary: ICE with -O -ftree-vectorize -funroll-loops
           Product: gcc
           Version: 4.2.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: target
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: kkojima at gcc dot gnu dot org
 GCC build triplet: i686-pc-linux-gnu
  GCC host triplet: i686-pc-linux-gnu
GCC target triplet: sh64-*-*


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25833