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From: "bonzini at gnu dot org" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug tree-optimization/26830] [4.1/4.2 Regression] Insane amount of compile-time / memory needed at -O1 and above Date: Fri, 24 Mar 2006 16:07:00 -0000 [thread overview] Message-ID: <20060324160716.17519.qmail@sourceware.org> (raw) In-Reply-To: <bug-26830-10053@http.gcc.gnu.org/bugzilla/> ------- Comment #15 from bonzini at gnu dot org 2006-03-24 16:07 ------- tree_duplicate_sese_region calls update_ssa. that makes the loop grow very fast with the number of basic blocks. 4.0, instead, has 5081 /* Add phi nodes for definitions at exit. TODO -- once we have immediate 5082 uses, it should be possible to emit phi nodes just for definitions that 5083 are used outside region. */ 5084 EXECUTE_IF_SET_IN_BITMAP (definitions, 0, ver, bi) 5085 { 5086 tree name = ssa_name (ver); 5087 5088 phi = create_phi_node (name, exit->dest); 5089 add_phi_arg (phi, name, exit); 5090 add_phi_arg (phi, name, exit_copy); 5091 5092 SSA_NAME_DEF_STMT (name) = phi; 5093 } 5094 5095 /* And create new definitions inside region and its copy. TODO -- once we 5096 have immediate uses, it might be better to leave definitions in region 5097 unchanged, create new ssa names for phi nodes on exit, and rewrite 5098 the uses, to avoid changing the copied region. */ 5099 allocate_ssa_names (definitions, &ssa_name_map); 5100 rewrite_to_new_ssa_names (region, n_region, ssa_name_map); 5101 allocate_ssa_names (definitions, &ssa_name_map); 5102 rewrite_to_new_ssa_names (region_copy, n_region, ssa_name_map); -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26830
next prev parent reply other threads:[~2006-03-24 16:07 UTC|newest] Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top 2006-03-23 16:45 [Bug tree-optimization/26830] New: Insane amount of compile-time / memory needed at -O1 and up rguenth at gcc dot gnu dot org 2006-03-23 16:48 ` [Bug tree-optimization/26830] " rguenth at gcc dot gnu dot org 2006-03-23 16:56 ` [Bug tree-optimization/26830] [4.1/4.2 Regression] " rguenth at gcc dot gnu dot org 2006-03-23 17:29 ` rguenth at gcc dot gnu dot org 2006-03-23 17:36 ` rguenth at gcc dot gnu dot org 2006-03-23 21:03 ` rguenth at gcc dot gnu dot org 2006-03-23 21:15 ` [Bug tree-optimization/26830] [4.1/4.2 Regression] Insane amount of compile-time / memory needed by into-ssa rguenth at gcc dot gnu dot org 2006-03-23 21:37 ` [Bug tree-optimization/26830] [4.1/4.2 Regression] Insane amount of compile-time / memory needed at -O1 and above rguenth at gcc dot gnu dot org 2006-03-23 22:09 ` rguenth at gcc dot gnu dot org 2006-03-24 8:43 ` rguenth at gcc dot gnu dot org 2006-03-24 14:15 ` bonzini at gnu dot org 2006-03-24 14:16 ` bonzini at gnu dot org 2006-03-24 14:16 ` bonzini at gnu dot org 2006-03-24 15:42 ` bonzini at gnu dot org 2006-03-24 15:50 ` rguenth at gcc dot gnu dot org 2006-03-24 16:07 ` bonzini at gnu dot org [this message] 2006-03-24 16:27 ` rguenth at gcc dot gnu dot org 2006-03-24 16:33 ` rguenth at gcc dot gnu dot org 2006-03-27 7:22 ` bonzini at gnu dot org 2006-03-27 7:37 ` bonzini at gnu dot org 2006-03-30 9:17 ` bonzini at gnu dot org 2006-03-30 14:04 ` bonzini at gnu dot org 2006-03-30 14:31 ` bonzini at gcc dot gnu dot org 2006-03-30 15:50 ` rguenth at gcc dot gnu dot org 2006-03-31 7:37 ` paolo dot bonzini at lu dot unisi dot ch 2006-04-03 13:37 ` bonzini at gcc dot gnu dot org 2006-04-03 13:40 ` [Bug tree-optimization/26830] [4.2 Regression] Repeated SSA update during loop header copying bonzini at gnu dot org 2006-04-03 14:16 ` rakdver at gcc dot gnu dot org 2006-04-03 16:20 ` rguenth at gcc dot gnu dot org 2006-04-03 16:31 ` rakdver at gcc dot gnu dot org 2006-04-04 9:21 ` bonzini at gnu dot org 2006-04-04 10:20 ` rakdver at atrey dot karlin dot mff dot cuni dot cz 2006-04-04 14:29 ` bonzini at gnu dot org 2006-04-12 12:20 ` rakdver at gcc dot gnu dot org 2006-04-12 14:09 ` dnovillo at redhat dot com 2006-04-12 14:20 ` rakdver at atrey dot karlin dot mff dot cuni dot cz 2006-04-12 14:24 ` dnovillo at redhat dot com 2006-04-14 0:06 ` rakdver at gcc dot gnu dot org 2006-05-15 18:25 ` rakdver at gcc dot gnu dot org 2006-05-15 21:56 ` rakdver at gcc dot gnu dot org 2006-05-30 6:20 ` bonzini at gnu dot org
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