diff options
Diffstat (limited to 'gcc/jump.c')
| -rw-r--r-- | gcc/jump.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/gcc/jump.c b/gcc/jump.c index a120300fc09..dc81c521851 100644 --- a/gcc/jump.c +++ b/gcc/jump.c @@ -449,6 +449,20 @@ reversed_comparison_code (rtx comparison, rtx insn) XEXP (comparison, 0), XEXP (comparison, 1), insn); } + +/* Return comparison with reversed code of EXP. + Return NULL_RTX in case we fail to do the reversal. */ +rtx +reversed_comparison (rtx exp, enum machine_mode mode) +{ + enum rtx_code reversed_code = reversed_comparison_code (exp, NULL_RTX); + if (reversed_code == UNKNOWN) + return NULL_RTX; + else + return simplify_gen_relational (reversed_code, mode, VOIDmode, + XEXP (exp, 0), XEXP (exp, 1)); +} + /* Given an rtx-code for a comparison, return the code for the negated comparison. If no such code exists, return UNKNOWN. |