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| author | Alexander Monakov <amonakov@ispras.ru> | 2010-01-14 14:16:02 +0300 |
|---|---|---|
| committer | Alexander Monakov <amonakov@gcc.gnu.org> | 2010-01-14 14:16:02 +0300 |
| commit | f07013eb07cfe45ef2d67ce9ddce7cea5883e5ac (patch) | |
| tree | b1c3a7504de19a5476e8315b3be562b68d760ff3 /gcc/sel-sched.c | |
| parent | a9ced68beb3b5d81dc6803f04cb33fb5e445c83a (diff) | |
| download | gcc-f07013eb07cfe45ef2d67ce9ddce7cea5883e5ac.zip gcc-f07013eb07cfe45ef2d67ce9ddce7cea5883e5ac.tar.gz gcc-f07013eb07cfe45ef2d67ce9ddce7cea5883e5ac.tar.bz2 | |
sel-sched.c (maybe_emit_renaming_copy): Exit early when expression to rename is not separable.
2010-01-14 Alexander Monakov <amonakov@ispras.ru>
* sel-sched.c (maybe_emit_renaming_copy): Exit early when expression
to rename is not separable. Otherwise check that its LHS is not NULL.
From-SVN: r155898
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 bdc7f9c..a1a0ec0 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; |