------- Comment #34 from rguenth at gcc dot gnu dot org 2006-09-03 13:22
-------
FYI, the profile (-O2) looks like
Flat profile:
Each sample counts as 0.01 seconds.
% cumulative self self total
time seconds seconds calls s/call s/call name
2.04 0.62 0.62 5210670 0.00 0.00 htab_find_slot_with_hash
2.01 1.23 0.61 135824 0.00 0.00 find_reloads
1.78 1.77 0.54 1181450 0.00 0.00 constrain_operands
1.71 2.29 0.52 1667653 0.00 0.00 walk_tree
1.64 2.79 0.50 113076 0.00 0.00 record_reg_classes
1.18 3.15 0.36 1374013 0.00 0.00 for_each_rtx_1
1.15 3.50 0.35 2188275 0.00 0.00 iterative_hash_expr
1.02 3.81 0.31 13803214 0.00 0.00 bitmap_bit_p
0.99 4.11 0.30 146294 0.00 0.00
reload_cse_simplify_operands
0.92 4.39 0.28 8238693 0.00 0.00 bitmap_set_bit
0.89 4.66 0.27 13524760 0.00 0.00 is_gimple_min_invariant
0.85 4.92 0.26 1944894 0.00 0.00 extract_insn
0.76 5.15 0.23 3242786 0.00 0.00 note_stores
0.76 5.38 0.23 1848575 0.00 0.00 mark_set_1
0.76 5.61 0.23 1073359 0.00 0.00 fold_binary
0.69 5.82 0.21 3530376 0.00 0.00 ix86_decompose_address
0.66 6.02 0.20 2801807 0.00 0.00 is_gimple_reg
0.66 6.22 0.20 101 0.00 0.02 reload
0.62 6.41 0.19 6596295 0.00 0.00 find_reg_note
0.62 6.60 0.19 3748843 0.00 0.00 ggc_alloc_stat
0.62 6.79 0.19 1543768 0.00 0.00 force_fit_type
0.59 6.97 0.18 5160059 0.00 0.00 pool_alloc
0.59 7.15 0.18 937999 0.00 0.00 make_node_stat
0.59 7.33 0.18 1915 0.00 0.00 cleanup_cfg
0.56 7.50 0.17 2132681 0.00 0.00 mark_all_vars_used_1
0.56 7.67 0.17 1015399 0.00 0.00 get_expr_operands
0.56 7.84 0.17 263419 0.00 0.00 cse_insn
0.53 8.00 0.16 2162651 0.00 0.00 cselib_lookup
0.53 8.16 0.16 1176845 0.00 0.00 mark_used_regs
0.53 8.32 0.16 101 0.00 0.01 reload_as_needed
0.49 8.47 0.15 1748131 0.00 0.00 operand_equal_p
0.49 8.62 0.15 1160005 0.00 0.00 propagate_one_insn
0.49 8.77 0.15 1086424 0.00 0.00 et_splay
0.49 8.92 0.15 1030222 0.00 0.00 rtx_cost
0.49 9.07 0.15 523805 0.00 0.00 count_reg_usage
0.46 9.21 0.14 3222872 0.00 0.00 memory_operand
0.46 9.35 0.14 1651283 0.00 0.00 htab_find_with_hash
0.46 9.49 0.14 693604 0.00 0.00 rewrite_update_stmt
0.46 9.63 0.14 457856 0.00 0.00 mul_double
we're hashing SCEV data a lot:
0.01 0.07 285600/2683522 set_instantiated_value [395]
0.01 0.09 398929/2683522 build_int_cst_wide [214]
0.02 0.20 864500/2683522 find_var_scev_info [184]
[68] 2.3 0.06 0.63 2683522 htab_find_slot [68]
0.34 0.16 2683522/11019933 htab_find_slot_with_hash
<cycle 26> [53]
0.03 0.00 1150100/1603800 hash_scev_info [589]
0.06 0.03 125694/1181450 reload_cse_simplify_operands
[94]
0.09 0.05 201473/1181450 find_matches [200]
0.32 0.16 698486/1181450 extract_constrain_insn_cached
[67]
[61] 2.7 0.54 0.28 1181450+14400 constrain_operands [61]
0.01 0.15 806498/873917 strict_memory_address_p [236]
0.05 0.00 272106/402044 operands_match_p [415]
0.05 0.04 100911/1588625 create_ssa_var_map [329]
0.07 0.06 144529/1588625 walk_tree_without_duplicates
[268]
0.14 0.13 292781/1588625 count_uses_and_derefs [149]
0.21 0.20 450984/1588625 remove_unused_locals [111]
[44] 3.9 0.52 0.68 1667653+3246362 walk_tree <cycle 20> [44]
0.06 0.18 337362/337362 find_used_portions [189]
0.08 0.12 1659486/1659486 pointer_set_insert [209]
0.00 0.06 97327/97327 scan_for_refs [487]
0.05 0.00 1267779/1267779 count_ptr_derefs [525]
0.01 0.56 143418/143418 regclass [71]
[80] 1.9 0.01 0.56 143418 scan_one_insn [80]
0.50 0.04 113076/113076 record_reg_classes [85]
0.01 0.01 100486/1944894 extract_insn [121]
0.00 0.07 209960/1775362 x86_extended_reg_mentioned_p
[364]
0.02 0.26 747868/1775362 approx_reg_cost [165]
[70] 2.2 0.04 0.62 1775362 for_each_rtx [70]
0.36 0.20 1374013/1374013 for_each_rtx_1 [82]
0.01 0.03 195736/659311 check_dependence [310]
0.03 0.01 202137/2188275 vn_add_with_vuses [301]
0.06 0.02 385100/2188275 phi_translate [110]
0.07 0.03 453965/2188275 vn_lookup_with_vuses [197]
0.11 0.04 687546/2188275 initialize_hash_element [235]
[96] 1.6 0.35 0.14 2188275+2621356 iterative_hash_expr [96]
0.11 0.00 1329048/1332689 iterative_hash [318]
0.03 0.00 1131815/1907772 commutative_tree_code [523]
0.01 0.00 508000/13803214 build_tree_conflict_graph
[618]
0.01 0.00 541400/13803214 propagate_one_insn [31]
0.02 0.00 793747/13803214 rewrite_update_stmt [215]
0.02 0.00 997246/13803214 mark_block_for_update [547]
0.03 0.00 1120737/13803214 set_contains_value [338]
0.03 0.00 1314587/13803214 prepare_block_for_update
[138]
0.03 0.00 1484822/13803214 mark_set_1 [87]
0.06 0.00 2575352/13803214 mark_used_reg [195]
[146] 1.0 0.31 0.00 13803214 bitmap_bit_p [146]
0.01 0.88 101/101 rest_of_handle_postreload [58]
[57] 2.9 0.01 0.88 101 reload_cse_regs [57]
0.02 0.84 202/202 reload_cse_regs_1 [59]
0.02 0.84 202/202 reload_cse_regs [57]
[59] 2.8 0.02 0.84 202 reload_cse_regs_1 [59]
0.30 0.20 146294/146294 reload_cse_simplify_operands
[94]
0.01 0.00 240636/8238693 set_def_block [398]
0.01 0.00 318100/8238693 compute_dominance_frontiers
[480]
0.02 0.00 451869/8238693 update_alias_info [118]
0.03 0.00 837338/8238693 insert_into_set [176]
0.03 0.00 1004991/8238693 mark_set_1 [87]
0.04 0.00 1218828/8238693 mark_used_reg [195]
[166] 0.9 0.28 0.00 8238693 bitmap_set_bit [166]
0.01 0.00 623522/13524760 value_insert_into_set [280]
0.03 0.00 1279640/13524760 set_contains_value [338]
0.03 0.00 1478781/13524760 insert_into_set [176]
0.10 0.00 4785141/13524760 get_value_handle [203]
[170] 0.9 0.27 0.00 13524760 is_gimple_min_invariant [170]
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18687
