__uint128_t add128(__uint128_t a, __uint128_t b) { return a + b; } GCC with -O3 produces: mov r9, rdi # a, a mov r10, rsi # a, a add r9, rdx # a, b adc r10, rcx # a, b mov rax, r9 # tmp93, a mov rdx, r10 #, a ret GCC 4.8.5 produced: mov rax, rdx # D.1732, b mov rdx, rcx # D.1732, b add rax, rdi # D.1732, a adc rdx, rsi # D.1732, a ret Clang produces: add rdi, rdx adc rsi, rcx mov rax, rdi mov rdx, rsi ret and ICC: add rdi, rdx #3.14 mov rax, rdi #3.14 adc rsi, rcx #3.14 mov rdx, rsi #3.14 ret #3.14 I don't know which component this should be, but Jakub suggested to CC Vlad and Uros, so maybe one of you can re-assign it to the right component.
This regressed with r204212 commit 284f069678f0b28c57e62b5da9b6dfed77d4d700 Author: vmakarov <vmakarov@138bc75d-0d04-0410-961f-82ee72b054a4> Date: Wed Oct 30 14:27:25 2013 +0000 2013-10-30 Vladimir Makarov <vmakarov@redhat.com> * regmove.c: Remove. * tree-pass.h (make_pass_regmove): Remove. * timevar.def (TV_REGMOVE): Remove. * passes.def (pass_regmove): Remove. * opts.c (default_options_table): Remove entry for regmove. * doc/passes.texi: Remove regmove pass description. * doc/invoke.texi (-foptimize-register-move, -fregmove): Remove options. (-fdump-rtl-regmove): Ditto. * common.opt (foptimize-register-move, fregmove): Ignore. * Makefile.in (OBJS): Remove regmove.o. * regmove.c: Remove. * ira-int.h (struct ira_allocno_pref, ira_pref_t): New structure and type. (struct ira_allocno) New member allocno_prefs. (ALLOCNO_PREFS): New macro. (ira_prefs, ira_prefs_num): New external vars. (ira_setup_alts, ira_get_dup_out_num, ira_debug_pref): New prototypes. (ira_debug_prefs, ira_debug_allocno_prefs, ira_create_pref): Ditto. (ira_add_allocno_pref, ira_remove_pref, ira_remove_allocno_prefs): Ditto. (ira_add_allocno_copy_to_list): Remove prototype. (ira_swap_allocno_copy_ends_if_necessary): Ditto. (ira_pref_iterator): New type. (ira_pref_iter_init, ira_pref_iter_cond): New functions. (FOR_EACH_PREF): New macro. * ira.c (commutative_constraint_p): Move from ira-conflicts.c. (ira_get_dup_out_num): Ditto. Rename from get_dup_num. Modify the code. (ira_setup_alts): New function. (decrease_live_ranges_number): New function. (ira): Call the above function. * ira-build.c (ira_prefs, ira_prefs_num): New global vars. (ira_create_allocno): Initialize allocno prefs. (pref_pool, pref_vec): New static vars. (initiate_prefs, find_allocno_pref, ira_create_pref): New functions. (add_allocno_pref_to_list, ira_add_allocno_pref, print_pref): Ditto. (ira_debug_pref, print_prefs, ira_debug_prefs): Ditto. (print_allocno_prefs, ira_debug_allocno_prefs, finish_pref): Ditto. (ira_remove_pref, ira_remove_allocno_prefs, finish_prefs): Ditto. (ira_add_allocno_copy_to_list): Make static. Rename to add_allocno_copy_to_list. (ira_swap_allocno_copy_ends_if_necessary): Make static. Rename to swap_allocno_copy_ends_if_necessary. (remove_unnecessary_allocnos, remove_low_level_allocnos): Call ira_remove_allocno_prefs. (ira_flattening): Ditto. (ira_build): Call initiate_prefs, print_prefs. (ira_destroy): Call finish_prefs. * ira-color.c (struct update_cost_record): New. (struct allocno_color_data): Add new member update_cost_records. (update_cost_record_pool): New static var. (init_update_cost_records, get_update_cost_record): New functions. (free_update_cost_record_list, finish_update_cost_records): Ditto. (struct update_cost_queue_elem): Add member from. (initiate_cost_update): Call init_update_cost_records. (finish_cost_update): Call finish_update_cost_records. (queue_update_cost, get_next_update_cost): Add new param from. (Update_allocno_cost, update_costs_from_allocno): New functions. (update_costs_from_prefs): Ditto. (update_copy_costs): Rename to update_costs_from_copies. (restore_costs_from_copies): New function. (update_conflict_hard_regno_costs): Don't go back. (assign_hard_reg): Call restore_costs_from_copies. Add printing more debug info. (pop_allocnos): Add priniting more debug info. (color_allocnos): Remove prefs for conflicting hard regs. Call update_costs_from_prefs. * ira-conflicts.c (commutative_constraint_p): Move to ira.c (get_dup_num): Rename, modify, and move to ira.c (process_regs_for_copy): Add prefs. (add_insn_allocno_copies): Put src as first arg of process_regs_for_copy. Remove dead code. Call ira_setup_alts. * ira-costs.c (record_reg_classes): Modify and move code into record_operands_costs. (find_costs_and_classes): Create prefs for the hard reg of small reg class. (process_bb_node_for_hard_reg_moves): Add prefs. 2013-10-30 Vladimir Makarov <vmakarov@redhat.com> * gcc.target/i386/fma_double_3.c: Use pattern for scan-assembler-times instead of just one insn name. * gcc.target/i386/fma_double_5.c: Ditto. * gcc.target/i386/fma_float_3.c: Ditto. * gcc.target/i386/fma_float_5.c: Ditto. * gcc.target/i386/l_fma_double_1.c: Ditto. * gcc.target/i386/l_fma_double_2.c: Ditto. * gcc.target/i386/l_fma_double_3.c: Ditto. * gcc.target/i386/l_fma_double_4.c: Ditto. * gcc.target/i386/l_fma_double_5.c: Ditto. * gcc.target/i386/l_fma_double_6.c: Ditto. * gcc.target/i386/l_fma_float_1.c: Ditto. * gcc.target/i386/l_fma_float_2.c: Ditto. * gcc.target/i386/l_fma_float_3.c: Ditto. * gcc.target/i386/l_fma_float_4.c: Ditto. * gcc.target/i386/l_fma_float_5.c: Ditto. * gcc.target/i386/l_fma_float_6.c: Ditto. git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@204212 138bc75d-0d04-0410-961f-82ee72b054a4
Maybe related to PR84757.
Actually, we have a dup for this already. *** This bug has been marked as a duplicate of bug 79185 ***