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[Bug rtl-optimization/23490] [3.4/4.0/4.1 Regression] Long compile time for array initializer with inlined constructor
- From: "steven at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 19 Sep 2005 11:07:40 -0000
- Subject: [Bug rtl-optimization/23490] [3.4/4.0/4.1 Regression] Long compile time for array initializer with inlined constructor
- References: <20050819224516.23490.falk@debian.org>
- Reply-to: gcc-bugzilla 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
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23490