diff options
Diffstat (limited to 'gcc/cse.c')
| -rw-r--r-- | gcc/cse.c | 18 |
1 files changed, 0 insertions, 18 deletions
@@ -3171,33 +3171,15 @@ fold_rtx (rtx x, rtx insn) { case RTX_UNARY: { - int is_const = 0; - /* We can't simplify extension ops unless we know the original mode. */ if ((code == ZERO_EXTEND || code == SIGN_EXTEND) && mode_arg0 == VOIDmode) break; - /* If we had a CONST, strip it off and put it back later if we - fold. */ - if (const_arg0 != 0 && GET_CODE (const_arg0) == CONST) - is_const = 1, const_arg0 = XEXP (const_arg0, 0); - new_rtx = simplify_unary_operation (code, mode, const_arg0 ? const_arg0 : folded_arg0, mode_arg0); - /* NEG of PLUS could be converted into MINUS, but that causes - expressions of the form - (CONST (MINUS (CONST_INT) (SYMBOL_REF))) - which many ports mistakenly treat as LEGITIMATE_CONSTANT_P. - FIXME: those ports should be fixed. */ - if (new_rtx != 0 && is_const - && GET_CODE (new_rtx) == PLUS - && (GET_CODE (XEXP (new_rtx, 0)) == SYMBOL_REF - || GET_CODE (XEXP (new_rtx, 0)) == LABEL_REF) - && GET_CODE (XEXP (new_rtx, 1)) == CONST_INT) - new_rtx = gen_rtx_CONST (mode, new_rtx); } break; |