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revert: lra-spills.c (lra_final_code_change): Remove useless move insns.

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2013-10-26  Vladimir Makarov  <vmakarov@redhat.com>

	Revert:
	2013-10-25  Vladimir Makarov  <vmakarov@redhat.com>
	* lra-spills.c (lra_final_code_change): Remove useless move insns.

From-SVN: r204094
This commit is contained in:
Vladimir Makarov 2013-10-26 17:02:49 +00:00 • committed by Vladimir Makarov
parent 9f0d9611e7
commit a6f623d4fa
2 changed files with 7 additions and 15 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
2013-10-26 Vladimir Makarov <vmakarov@redhat.com>
Revert:
2013-10-25 Vladimir Makarov <vmakarov@redhat.com>
* lra-spills.c (lra_final_code_change): Remove useless move insns.
2013-10-26 Jeff Law <law@redhat.com>
* predict.c (PRED_MUDFLAP): Remove.

16
gcc/lra-spills.c
View file

@ -625,7 +625,7 @@ lra_final_code_change (void)
{
int i, hard_regno;
basic_block bb;
rtx insn, curr, set;
rtx insn, curr;
int max_regno = max_reg_num ();
for (i = FIRST_PSEUDO_REGISTER; i < max_regno; i++)
@ -661,19 +661,5 @@ lra_final_code_change (void)
}
if (insn_change_p)
lra_update_operator_dups (id);
if ((set = single_set (insn)) != NULL
&& REG_P (SET_SRC (set)) && REG_P (SET_DEST (set))
&& REGNO (SET_SRC (set)) == REGNO (SET_DEST (set)))
{
/* Remove an useless move insn. IRA can generate move
insns involving pseudos. It is better remove them
earlier to speed up compiler a bit. It is also
better to do it here as they might not pass final RTL
check in LRA, (e.g. insn moving a control register
into itself). */
lra_invalidate_insn_data (insn);
delete_insn (insn);
}
}
}