[Bug c++/35182] [4.2/4.3 Regression] ICE in coalesce_abnormal_edges

[hubicka at gcc dot gnu dot org]

------- Comment #10 from hubicka at gcc dot gnu dot org  2008-02-15 11:55 
-------
Seems like it. After fwprop1 iter_1 and iter_7 conflict:

  D.2095_6 = &iter_1(ab)->D.2086;
  iter_7(ab) = iter_1(ab) + 8;
  __comp_ctor  (&D.2138, D.2094_5);
  # SUCC: 4 [100.0%]  (fallthru,exec) 5 (ab,eh,exec)

  # BLOCK 4
  # PRED: 3 [100.0%]  (fallthru,exec)
  D.2139_8 = D.2138._M_refcount._M_pi;
  iter_1(ab)->D.2086._M_refcount._M_pi ={v} D.2139_8;
  goto <bb 2>;

before they doesn't:
  # BLOCK 3
  # PRED: 2 (fallthru,exec)
  D.2094_5 = (int *) D.2093_4;
  D.2095_6 = &iter_1(ab)->D.2086;
  iter_7(ab) = iter_1(ab) + 8;
  __comp_ctor  (&D.2138, D.2094_5);
  # SUCC: 4 [100.0%]  (fallthru,exec) 5 (ab,eh,exec)

  # BLOCK 4
  # PRED: 3 [100.0%]  (fallthru,exec)
  D.2139_8 = D.2138._M_refcount._M_pi;
  D.2095_6->_M_refcount._M_pi ={v} D.2139_8;
  goto <bb 2>;
  # SUCC: 2 (fallthru,exec)

I will be away for a weekend, so I goess I won't beat you :(

Honza


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35182