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| author | Steven Bosscher <stevenb@suse.de> | 2005-11-12 00:09:48 +0000 |
|---|---|---|
| committer | Steven Bosscher <steven@gcc.gnu.org> | 2005-11-12 00:09:48 +0000 |
| commit | b644b211443d729df47a7ae2abc7c776b029b094 (patch) | |
| tree | b4896826fd17ca2498002a932d89a1fcdaf6e28f /gcc/loop-invariant.c | |
| parent | 6c14b137a907a5eda102567d6fac239aec447c8c (diff) | |
| download | gcc-b644b211443d729df47a7ae2abc7c776b029b094.zip gcc-b644b211443d729df47a7ae2abc7c776b029b094.tar.gz gcc-b644b211443d729df47a7ae2abc7c776b029b094.tar.bz2 | |
loop-invariant.c (move_loop_invariants): Fix a thinko in the previous checkin.
* loop-invariant.c (move_loop_invariants): Fix a thinko in the
previous checkin.
From-SVN: r106809
Diffstat (limited to 'gcc/loop-invariant.c')
| -rw-r--r-- | gcc/loop-invariant.c | 19 |
1 files changed, 16 insertions, 3 deletions
diff --git a/gcc/loop-invariant.c b/gcc/loop-invariant.c index dc35ace..a909e64 100644 --- a/gcc/loop-invariant.c +++ b/gcc/loop-invariant.c @@ -796,9 +796,22 @@ move_invariant_reg (struct loop *loop, unsigned invno, struct df *df) reg = gen_reg_rtx (GET_MODE (SET_DEST (set))); df_pattern_emit_after (df, gen_move_insn (SET_DEST (set), reg), BLOCK_FOR_INSN (inv->insn), inv->insn); - df_pattern_emit_after (df, gen_move_insn (reg, SET_SRC (set)), - preheader, BB_END (preheader)); - df_insn_delete (df, BLOCK_FOR_INSN (inv->insn), inv->insn); + + /* If the SET_DEST of the invariant insn is a reg, we can just move + the insn out of the loop. Otherwise, we have to use gen_move_insn + to let emit_move_insn produce a valid instruction stream. */ + if (REG_P (SET_DEST (set))) + { + SET_DEST (set) = reg; + reorder_insns (inv->insn, inv->insn, BB_END (preheader)); + df_insn_modify (df, preheader, inv->insn); + } + else + { + df_pattern_emit_after (df, gen_move_insn (reg, SET_SRC (set)), + preheader, BB_END (preheader)); + df_insn_delete (df, BLOCK_FOR_INSN (inv->insn), inv->insn); + } /* Replace the uses we know to be dominated. It saves work for copy propagation, and also it is necessary so that dependent invariants |