diff options
Diffstat (limited to 'gcc/sel-sched.c')
| -rw-r--r-- | gcc/sel-sched.c | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/gcc/sel-sched.c b/gcc/sel-sched.c index bdc7f9c42bc..a1a0ec06e0d 100644 --- a/gcc/sel-sched.c +++ b/gcc/sel-sched.c @@ -5823,14 +5823,19 @@ maybe_emit_renaming_copy (rtx insn, moveop_static_params_p params) { bool insn_emitted = false; - rtx cur_reg = expr_dest_reg (params->c_expr); + rtx cur_reg; - gcc_assert (!cur_reg || (params->dest && REG_P (params->dest))); + /* Bail out early when expression can not be renamed at all. */ + if (!EXPR_SEPARABLE_P (params->c_expr)) + return false; + + cur_reg = expr_dest_reg (params->c_expr); + gcc_assert (cur_reg && params->dest && REG_P (params->dest)); /* If original operation has expr and the register chosen for that expr is not original operation's dest reg, substitute operation's right hand side with the register chosen. */ - if (cur_reg != NULL_RTX && REGNO (params->dest) != REGNO (cur_reg)) + if (REGNO (params->dest) != REGNO (cur_reg)) { insn_t reg_move_insn, reg_move_insn_rtx; |