diff options
Diffstat (limited to 'gcc/expr.c')
| -rw-r--r-- | gcc/expr.c | 10 |
1 files changed, 0 insertions, 10 deletions
@@ -7854,16 +7854,6 @@ expand_expr (tree exp, rtx target, enum machine_mode tmode, op0 = expand_expr (TREE_OPERAND (exp, 0), subtarget, VOIDmode, EXPAND_SUM); - /* If we knew for certain that this is arithmetic for an array - reference, and we knew the bounds of the array, then we could - apply the distributive law across (PLUS X C) for constant C. - Without such knowledge, we risk overflowing the computation - when both X and C are large, but X+C isn't. */ - /* ??? Could perhaps special-case EXP being unsigned and C being - positive. In that case we are certain that X+C is no smaller - than X and so the transformed expression will overflow iff the - original would have. */ - if (GET_CODE (op0) != REG) op0 = force_operand (op0, NULL_RTX); if (GET_CODE (op0) != REG) |