https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88217
Bug ID: 88217
Summary: [8/9 Regression] Compile time and memory hog w/ -O2
-fstrict-enums -fno-tree-forwprop -fno-tree-fre
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Keywords: compile-time-hog, memory-hog
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: asolokha at gmx dot com
Target Milestone: ---
g++-9.0.0-alpha20181125 snapshot (r266441) takes inordinate amount of time and
memory compiling gcc/testsuite/g++.dg/cpp0x/range-for17.C w/ -O2 (-O3, -Ofast)
-fstrict-enums -fno-tree-forwprop -fno-tree-fre:
% timeout 10 gcc-9.0.0-alpha20181125 -O2 -fstrict-enums -fno-tree-forwprop
-fno-tree-fre -c gcc/testsuite/g++.dg/cpp0x/range-for17.C
zsh: exit 124 timeout 10 gcc-9.0.0-alpha20181125 -O2 -fstrict-enums
-fno-tree-forwprop -c
perf top:
Overhead Shared Objec Symbol
10.15% cc1plus [.] compare_values_warnv
8.78% cc1plus [.] operand_equal_p
6.99% cc1plus [.] tree_int_cst_compare
4.56% cc1plus [.] tree_int_cst_equal
4.30% cc1plus [.] value_range_base::check
3.66% cc1plus [.] get_single_symbol
2.85% cc1plus [.] wide_int_to_tree_1
2.57% cc1plus [.] operand_less_p
2.56% cc1plus [.] value_range::intersect_helper
2.39% cc1plus [.] wi::lts_p<generic_wide_int<wi::extended_tree<192>
>, generic_wide_int<wi::extended_tree<192> > >
2.22% cc1plus [.] hash_table<int_cst_hasher,
xcallocator>::find_slot_with_hash
2.06% cc1plus [.] int_cst_hasher::hash
2.03% cc1plus [.] int_cst_hasher::equal
1.78% cc1plus [.] wi::extended_tree<192>::extended_tree
1.45% cc1plus [.] fold_convert_loc
1.37% cc1plus [.] vr_values::get_value_range
1.29% cc1plus [.] value_range::set
1.29% cc1plus [.] is_gimple_min_invariant
1.25% cc1plus [.] inchash::add_expr
1.20% cc1plus [.] wi::force_to_size
1.19% cc1plus [.] vrp_operand_equal_p
1.16% cc1plus [.] add_ssa_edge
1.05% cc1plus [.] gimple_simplify
0.94% cc1plus [.] vr_values::update_value_range
0.94% cc1plus [.] value_range_base::set_and_canonicalize
0.94% cc1plus [.] get_range_info
0.89% cc1plus [.] int_const_binop
0.89% cc1plus [.] tree_ssa_useless_type_conversion
0.89% cc1plus [.] bitmap_set_bit
0.82% cc1plus [.] ssa_propagation_engine::simulate_stmt
0.76% cc1plus [.] iterative_hash_host_wide_int
0.74% cc1plus [.] vrp_valueize_1
0.73% cc1plus [.] get_range_info
0.71% cc1plus [.] value_range::set_equiv
0.68% cc1plus [.] extract_range_into_wide_ints
0.66% cc1plus [.] wi::to_wide
0.66% cc1plus [.] get_int_cst_ext_nunits
0.59% cc1plus [.] vrp_prop::visit_stmt
0.58% cc1plus [.] extract_range_from_binary_expr
0.58% cc1plus [.] extract_range_from_unary_expr
0.58% cc1plus [.] ssa_propagation_engine::ssa_propagate
0.54% cc1plus [.] gimple_fold_stmt_to_constant_1
0.53% cc1plus [.] bitmap_copy
0.48% cc1plus [.] stmt_interesting_for_vrp
0.48% cc1plus [.] vr_values::vrp_visit_assignment_or_call
0.46% cc1plus [.] vr_values::extract_range_from_phi_node
0.43% cc1plus [.] instantiate_scev_r
0.41% cc1plus [.] tree_ssa_strip_useless_type_conversions
0.41% cc1plus [.] value_range::check
0.41% cc1plus [.] canonize
0.41% cc1plus [.] bitmap_clear_bit
0.41% cc1plus [.] wide_int_range_convert
0.41% cc1plus [.] vrp_valueize
0.41% cc1plus [.] wi::divmod_internal
