This has no effect on arith-rand-ll (which suffers badly from LRA) and marginal effects (0.01% improvement) on coremark, but the size of coremark shrinks by 0.2%. An earlier version was tested with a tree around 2023-03 which showed (marginally) that ALL_REGS is preferable to GENERAL_REGS.
* config/cris/cris.cc (TARGET_SPILL_CLASS): Define to ALL_REGS. --- gcc/config/cris/cris.cc | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/gcc/config/cris/cris.cc b/gcc/config/cris/cris.cc index 641e7ea25fb1..373b9999e0db 100644 --- a/gcc/config/cris/cris.cc +++ b/gcc/config/cris/cris.cc @@ -134,6 +134,7 @@ static void cris_init_libfuncs (void); static unsigned int cris_postdbr_cmpelim (void); static reg_class_t cris_preferred_reload_class (rtx, reg_class_t); +static reg_class_t cris_spill_class (reg_class_t, machine_mode); static int cris_register_move_cost (machine_mode, reg_class_t, reg_class_t); static int cris_memory_move_cost (machine_mode, reg_class_t, bool); @@ -224,6 +225,9 @@ int cris_cpu_version = CRIS_DEFAULT_CPU_VERSION; #undef TARGET_PREFERRED_RELOAD_CLASS #define TARGET_PREFERRED_RELOAD_CLASS cris_preferred_reload_class +#undef TARGET_SPILL_CLASS +#define TARGET_SPILL_CLASS cris_spill_class + /* We don't define TARGET_FIXED_CONDITION_CODE_REGS, as at the time of this writing, it has an effect only on pre-reload CSE and when scheduling (and for "macro fusion" at that). Neither applies for @@ -1684,6 +1688,14 @@ cris_preferred_reload_class (rtx x, reg_class_t rclass) return rclass; } +/* Worker function for TARGET_SPILL_CLASS. */ + +static reg_class_t +cris_spill_class (reg_class_t /* orig_class */, machine_mode) +{ + return ALL_REGS; +} + /* Worker function for TARGET_REGISTER_MOVE_COST. */ static int -- 2.30.2