diff options
Diffstat (limited to 'gcc/rtl.h')
| -rw-r--r-- | gcc/rtl.h | 27 |
1 files changed, 24 insertions, 3 deletions
@@ -1195,6 +1195,9 @@ extern unsigned int subreg_regno_offset (unsigned int, enum machine_mode, extern bool subreg_offset_representable_p (unsigned int, enum machine_mode, unsigned int, enum machine_mode); extern unsigned int subreg_regno (rtx); +extern unsigned HOST_WIDE_INT nonzero_bits (rtx, enum machine_mode); +extern unsigned int num_sign_bit_copies (rtx, enum machine_mode); + /* 1 if RTX is a subreg containing a reg that is already known to be sign- or zero-extended from the mode of the subreg to the mode of @@ -1598,9 +1601,6 @@ extern rtx gen_rtx_REG_offset (rtx, enum machine_mode, unsigned int, int); extern rtx gen_label_rtx (void); extern int subreg_hard_regno (rtx, int); extern rtx gen_lowpart_common (enum machine_mode, rtx); -extern rtx gen_lowpart_general (enum machine_mode, rtx); -extern rtx (*gen_lowpart) (enum machine_mode mode, rtx x); - /* In cse.c */ extern rtx gen_lowpart_if_possible (enum machine_mode, rtx); @@ -2461,4 +2461,25 @@ extern void simplify_using_condition (rtx, rtx *, struct bitmap_head_def *); /* In ra.c. */ extern void reg_alloc (void); + +struct rtl_hooks +{ + rtx (*gen_lowpart) (enum machine_mode, rtx); + rtx (*reg_nonzero_bits) (rtx, enum machine_mode, rtx, enum machine_mode, + unsigned HOST_WIDE_INT, unsigned HOST_WIDE_INT *); + rtx (*reg_num_sign_bit_copies) (rtx, enum machine_mode, rtx, enum machine_mode, + unsigned int, unsigned int *); + + /* Whenever you add entries here, make sure you adjust hosthooks-def.h. */ +}; + +/* Each pass can provide its own. */ +extern struct rtl_hooks rtl_hooks; + +/* ... but then it has to restore these. */ +extern const struct rtl_hooks general_rtl_hooks; + +/* Keep this for the nonce. */ +#define gen_lowpart rtl_hooks.gen_lowpart + #endif /* ! GCC_RTL_H */ |