diff options
Diffstat (limited to 'gcc/regs.h')
| -rw-r--r-- | gcc/regs.h | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/gcc/regs.h b/gcc/regs.h index 20587ac27b2..00be997695f 100644 --- a/gcc/regs.h +++ b/gcc/regs.h @@ -262,9 +262,27 @@ extern int caller_save_needed; #define HARD_REGNO_CALL_PART_CLOBBERED(REGNO, MODE) 0 #endif +/* 1 if the corresponding class does contain register of given + mode. */ +extern char contains_reg_of_mode [N_REG_CLASSES] [MAX_MACHINE_MODE]; + +typedef unsigned short move_table[N_REG_CLASSES]; + +/* Maximum cost of moving from a register in one class to a register + in another class. */ +extern move_table *move_cost[MAX_MACHINE_MODE]; + /* Specify number of hard registers given machine mode occupy. */ extern unsigned char hard_regno_nregs[FIRST_PSEUDO_REGISTER][MAX_MACHINE_MODE]; +/* Similar, but here we don't have to move if the first index is a + subset of the second so in that case the cost is zero. */ +extern move_table *may_move_in_cost[MAX_MACHINE_MODE]; + +/* Similar, but here we don't have to move if the first index is a + superset of the second so in that case the cost is zero. */ +extern move_table *may_move_out_cost[MAX_MACHINE_MODE]; + /* Return an exclusive upper bound on the registers occupied by hard register (reg:MODE REGNO). */ |