[Bug tree-optimization/23911] Failure to propagate constants from a const initializer for _Complex

[steven at gcc dot gnu dot org]

------- Additional Comments From steven at gcc dot gnu dot org  2005-09-16 
10:39 -------
The reason why this only happens in store-ccp is this: 
 
  /* If we are not doing store-ccp, statements with loads 
     and/or stores will never fold into a constant.  */ 
  if (!do_store_ccp 
      && (ann->makes_aliased_stores 
          || ann->makes_aliased_loads 
          || !ZERO_SSA_OPERANDS (stmt, SSA_OP_ALL_VIRTUALS))) 
    return VARYING; 
 
But statements making loads _will_ fold into a constant if the load is 
made from a constant initializer. 
 

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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23911