[Bug rtl-optimization/25483] [4.2 Regression] ICE on valid code with -O2 -fmove-loop-invariants

[steven at gcc dot gnu dot org]

------- Comment #5 from steven at gcc dot gnu dot org  2005-12-18 23:44 -------
We get to iterative_dataflow from df_analyze_subcfg with this dataflow
argument:

(gdb) p *dataflow
$11 = {repr = SR_BITMAP, gen = 0xf43d90, kill = 0xf439d0, in = 0xf55ac0, out =
0xf57ca0,
  dir = DF_FORWARD, conf_op = DF_UNION, n_blocks = 2, order = 0xf35cc0,
  transfun = 0x645b5e <df_rd_transfer_function>, data = 0x0}
(gdb)                                                           

Then we do in iterative_dataflow:
  for (i = 0; i < dataflow->n_blocks - NUM_FIXED_BLOCKS; i++)

i.e. we do nothing at all.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25483