diff options
Diffstat (limited to 'gcc/loop.c')
| -rw-r--r-- | gcc/loop.c | 18 |
1 files changed, 11 insertions, 7 deletions
@@ -5496,14 +5496,18 @@ loop_givs_rescan (struct loop *loop, struct iv_class *bl, rtx *reg_map) v->new_reg)); else if (GET_CODE (*v->location) == PLUS && REG_P (XEXP (*v->location, 0)) - && REG_P (v->new_reg) && CONSTANT_P (XEXP (*v->location, 1))) - loop_insn_emit_before (loop, 0, v->insn, - gen_move_insn (XEXP (*v->location, 0), - gen_rtx_MINUS - (GET_MODE (*v->location), - v->new_reg, - XEXP (*v->location, 1)))); + { + rtx tem; + start_sequence (); + tem = expand_simple_binop (GET_MODE (*v->location), MINUS, + v->new_reg, XEXP (*v->location, 1), + NULL_RTX, 0, OPTAB_LIB_WIDEN); + emit_move_insn (XEXP (*v->location, 0), tem); + tem = get_insns (); + end_sequence (); + loop_insn_emit_before (loop, 0, v->insn, tem); + } else { /* If it wasn't a reg, create a pseudo and use that. */ |