[Bug tree-optimization/23546] [4.0/4.1 Regression] ICE in for_each_index, at tree-ssa-loop-im.c:202

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2005-08-24 
12:40 -------
The loop is:
  # mask_12 = PHI <mask_26(3), mask_6(1)>;
<L0>:;
  __m2_11 = VIEW_CONVERT_EXPR<vector int>(0);
  D.1667_18 = VIEW_CONVERT_EXPR<vector signed char>(__m2_11);
  D.1668_19 = VIEW_CONVERT_EXPR<vector signed char>(D.1659_15);
  D.1669_20 = __builtin_ia32_punpcklbw (D.1668_19, D.1667_18);
  mask_26 = mask_12 + 4B;
  if (end_7 > mask_26) goto <L10>; else goto <L2>;


so tree-ssa-loop-im is not handling VCE at all.

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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23546