[Bug middle-end/37448] gcc 4.3.1 cannot compile big function

["rguenth at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>]

------- Comment #3 from rguenth at gcc dot gnu dot org  2008-09-10 08:02 -------
It indeed uses about 1.4GB ram and takes 26s (I think that's reasonable) to
build the testcase.  It's the DF initialize pass that requires this much
memory.  The function in question has 31671 basic blocks.  dfinish doesn't
seem to free it btw.

(gdb) print *df
$56 = {problems_in_order = {0x1b25920, 0x1b259a0, 0x0, 0x0, 0x0, 0x0}, 
  problems_by_index = {0x1b25920, 0x1b259a0, 0x0, 0x0, 0x0, 0x0}, 
  num_problems_defined = 2, blocks_to_analyze = 0x0, analyze_subset = 0 '\0', 
  redo_entry_and_exit = 0 '\0', def_info = {refs = 0x0, begin = 0x19ee470, 
    count = 0x38e3e2e0, refs_size = 0, table_size = 0, total_size = 7482051, 
    ref_order = DF_REF_ORDER_NO_TABLE}, use_info = {refs = 0x0, 
    begin = 0x38ef7fe0, count = 0x38fb1ce0, refs_size = 0, table_size = 0, 
    total_size = 644313, ref_order = DF_REF_ORDER_NO_TABLE}, 
  def_regs = 0x2f766c50, use_regs = 0x38b56f20, eq_use_regs = 0x38cca900, 
  regs_size = 190267, regs_inited = 152214, insns = 0x1d48fb0, 
  insns_size = 792538, hardware_regs_used = 0x2ef1e640, 
  regular_block_artificial_uses = 0x2ef1e660, 
  eh_block_artificial_uses = 0x2ef1e680, entry_block_defs = 0x2ef1e6a0, 
  exit_block_uses = 0x2ef1e6c0, insns_to_delete = 0x2f928b40, 
  insns_to_rescan = 0x2f928b60, insns_to_notes_rescan = 0x2f928b80, 
  postorder = 0x30d2c60, postorder_inverted = 0x30f1b50, n_blocks = 31671, 
  n_blocks_inverted = 31671, hard_regs_live_count = 0x1940610, 
  ref_order = 39346414, changeable_flags = 0}

Kenny, any idea where the memory leaks?


-- 

rguenth at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |zadeck at naturalbridge dot
                   |                            |com
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|0                           |1
   Last reconfirmed|0000-00-00 00:00:00         |2008-09-10 08:02:43
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37448