[Bug rtl-optimization/23490] [3.4/4.0/4.1 Regression] Long compile time for array initializer with inlined constructor

[steven at gcc dot gnu dot org]

------- Additional Comments From steven at gcc dot gnu dot org  2005-09-19 11:07 -------
Even the bad timings for postreload-gcse are almost entirely to blame on RTL 
alias analysis: 
 
CPU: P4 / Xeon with 2 hyper-threads, speed 3194.18 MHz (estimated) 
Counted GLOBAL_POWER_EVENTS events (time during which processor is not 
stopped) with a unit mask of 0x01 (mandatory) count 1000000 
samples  %        symbol name 
4503     10.9264  rtx_equal_for_memref_p 
3080      7.4736  canon_rtx 
2298      5.5760  memrefs_conflict_p 
2219      5.3844  find_base_term 
2057      4.9913  ix86_find_base_term 
1877      4.5545  nonoverlapping_component_refs_p 
1474      3.5766  for_each_rtx_1 
1412      3.4262  nonoverlapping_memrefs_p 
1386      3.3631  addr_side_effect_eval 
1279      3.1035  mems_in_disjoint_alias_sets_p 
764       1.8538  get_addr 
710       1.7228  exp_equiv_p 
682       1.6549  invalidate 
604       1.4656  check_dependence 
587       1.4243  is_gimple_stmt 
579       1.4049  cselib_invalidate_mem 
553       1.3418  canon_true_dependence 
532       1.2909  rtx_equal_p 
406       0.9851  cse_insn 
398       0.9657  decl_for_component_ref 
359       0.8711  ldst_entry 
341       0.8274  verify_expr 
304       0.7376  walk_tree 
272       0.6600  alias_sets_conflict_p 
272       0.6600  base_alias_check 
 

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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23490