diff options
Diffstat (limited to 'gcc/rtlanal.c')
| -rw-r--r-- | gcc/rtlanal.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/gcc/rtlanal.c b/gcc/rtlanal.c index d8c9fb8..bbf7e71 100644 --- a/gcc/rtlanal.c +++ b/gcc/rtlanal.c @@ -4808,6 +4808,16 @@ get_condition (rtx jump, rtx *earliest, int allow_cc_mode, int valid_at_insn_p) allow_cc_mode, valid_at_insn_p); } +/* Suppose that truncation from the machine mode of X to MODE is not a + no-op. See if there is anything special about X so that we can + assume it already contains a truncated value of MODE. */ + +bool +truncated_to_mode (enum machine_mode mode, rtx x) +{ + return REG_P (x) && rtl_hooks.reg_truncated_to_mode (mode, x); +} + /* Initialize non_rtx_starting_operands, which is used to speed up for_each_rtx. */ |