https://gcc.gnu.org/bugzilla/show_bug.cgi?id=118560

--- Comment #2 from Sam James <sjames at gcc dot gnu.org> ---
On this testcase at -O1 or -O0, it spends ages in RA (still running):
    23.09%  cc1      cc1               [.] spill_pseudos
    20.35%  cc1      cc1               [.] lra_create_live_ranges_1
     7.91%  cc1      cc1               [.] lra_constraints
     4.86%  cc1      cc1               [.] lra_assign
     4.18%  cc1      cc1               [.]
base_pool_allocator<memory_block_pool>::allocate
     3.11%  cc1      cc1               [.] bitmap_set_bit
     2.84%  cc1      cc1               [.]
remove_some_program_points_and_update_live_ranges
     2.68%  cc1      cc1               [.] lra_spill
     2.68%  cc1      cc1               [.] lra_clear_live_ranges
     2.26%  cc1      cc1               [.] process_alt_operands
     1.51%  cc1      cc1               [.] may_trap_p_1
     1.42%  cc1      cc1               [.] eliminate_regs_in_insn
     1.23%  cc1      cc1               [.] mark_pseudo_dead
     1.20%  cc1      cc1               [.] update_lives
     1.03%  cc1      cc1               [.] resize_reg_info

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