diff options
Diffstat (limited to 'gcc/jump.c')
| -rw-r--r-- | gcc/jump.c | 26 |
1 files changed, 25 insertions, 1 deletions
diff --git a/gcc/jump.c b/gcc/jump.c index 0b62ab42114..806e190822d 100644 --- a/gcc/jump.c +++ b/gcc/jump.c @@ -1265,6 +1265,23 @@ onlyjump_p (insn) #ifdef HAVE_cc0 +/* Return non-zero if X is an RTX that only sets the condition codes + and has no side effects. */ + +int +only_sets_cc0_p (x) + rtx x; +{ + + if (! x) + return 0; + + if (INSN_P (x)) + x = PATTERN (x); + + return sets_cc0_p (x) == 1 && ! side_effects_p (x); +} + /* Return 1 if X is an RTX that does nothing but set the condition codes and CLOBBER or USE registers. Return -1 if X does explicitly set the condition codes, @@ -1272,8 +1289,15 @@ onlyjump_p (insn) int sets_cc0_p (x) - rtx x ATTRIBUTE_UNUSED; + rtx x; { + + if (! x) + return 0; + + if (INSN_P (x)) + x = PATTERN (x); + if (GET_CODE (x) == SET && SET_DEST (x) == cc0_rtx) return 1; if (GET_CODE (x) == PARALLEL) |