diff options
Diffstat (limited to 'gcc/combine.c')
| -rw-r--r-- | gcc/combine.c | 29 |
1 files changed, 0 insertions, 29 deletions
diff --git a/gcc/combine.c b/gcc/combine.c index 0c06b2d102c..7cdf396a66c 100644 --- a/gcc/combine.c +++ b/gcc/combine.c @@ -4906,24 +4906,6 @@ combine_simplify_rtx (rtx x, enum machine_mode op0_mode, int in_dest) return gen_lowpart (mode, XEXP (x, 0)); break; -#ifdef HAVE_cc0 - case COMPARE: - /* Convert (compare FOO (const_int 0)) to FOO unless we aren't - using cc0, in which case we want to leave it as a COMPARE - so we can distinguish it from a register-register-copy. */ - if (XEXP (x, 1) == const0_rtx) - return XEXP (x, 0); - - /* x - 0 is the same as x unless x's mode has signed zeros and - allows rounding towards -infinity. Under those conditions, - 0 - 0 is -0. */ - if (!(HONOR_SIGNED_ZEROS (GET_MODE (XEXP (x, 0))) - && HONOR_SIGN_DEPENDENT_ROUNDING (GET_MODE (XEXP (x, 0)))) - && XEXP (x, 1) == CONST0_RTX (GET_MODE (XEXP (x, 0)))) - return XEXP (x, 0); - break; -#endif - case CONST: /* (const (const X)) can become (const X). Do it this way rather than returning the inner CONST since CONST can be shared with a @@ -5758,17 +5740,6 @@ simplify_set (rtx x) if (other_changed) undobuf.other_insn = other_insn; -#ifdef HAVE_cc0 - /* If we are now comparing against zero, change our source if - needed. If we do not use cc0, we always have a COMPARE. */ - if (op1 == const0_rtx && dest == cc0_rtx) - { - SUBST (SET_SRC (x), op0); - src = op0; - } - else -#endif - /* Otherwise, if we didn't previously have a COMPARE in the correct mode, we need one. */ if (GET_CODE (src) != COMPARE || GET_MODE (src) != compare_mode) |