https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106617
--- Comment #6 from Sergei Trofimovich <slyfox at gcc dot gnu.org> --- Created attachment 53455 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=53455&action=edit ring_buffer.c.gz ring_buffer.c.gz is a preprocessed file from linux-4.19. $ time gcc-12.1.0 -O2 -c ring_buffer.c -o bug.o real 0m0,308s user 0m0,285s sys 0m0,017s $ gcc -O2 -c ring_buffer.c -o bug.o # Runs for minutes, increases RAM usage, never finishes. perf stats after 3 minutes' run: 10,16% cc1 [.] operand_compare::operand_equal_p 7,38% cc1 [.] fold_binary_loc 7,01% cc1 [.] generic_simplify_453 5,63% cc1 [.] generic_simplify_GT_EXPR 3,72% cc1 [.] wide_int_binop 3,42% cc1 [.] generic_simplify_COND_EXPR 3,38% cc1 [.] hash_table<int_cst_hasher, false, xcallocator>::find_slot_with_hash 3,04% cc1 [.] wide_int_to_tree_1 3,00% cc1 [.] tree_strip_nop_conversions 2,82% cc1 [.] int_const_binop 2,47% cc1 [.] get_inner_reference 2,45% cc1 [.] fold_build2_loc 2,23% cc1 [.] fold_ternary_loc 2,07% cc1 [.] tree_strip_sign_nop_conversions 1,96% cc1 [.] int_cst_hasher::hash 1,83% cc1 [.] ggc_internal_alloc 1,81% cc1 [.] fold_relational_const 1,61% cc1 [.] wi::fits_to_tree_p<poly_int<1u, generic_wide_int<wide_int_ref_storage<false, true> > > > 1,57% cc1 [.] generic_simplify_155 1,51% cc1 [.] operand_equal_p 1,22% cc1 [.] dbg_cnt 1,20% cc1 [.] element_precision 1,10% cc1 [.] ggc_free
