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Simplification within reorg.c

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gcc/ChangeLog:
2014-09-05  David Malcolm  <dmalcolm@redhat.com>

	* reorg.c (relax_delay_slots): Move declaration of "trial_seq"
	above the conditional, and convert the check on GET_CODE to a
	dyn_cast, so that "trial_seq" is available as an rtx_sequence * in
	the conditional.  Simplify the conditional by using methods of
	"trial_seq".

From-SVN: r214969
This commit is contained in:
David Malcolm 2014-09-05 15:03:12 +00:00 • committed by David Malcolm
parent 96b7041496
commit 45700b6a42
2 changed files with 15 additions and 6 deletions
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8
gcc/ChangeLog
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@ -1,3 +1,11 @@
2014-09-05 David Malcolm <dmalcolm@redhat.com>
* reorg.c (relax_delay_slots): Move declaration of "trial_seq"
above the conditional, and convert the check on GET_CODE to a
dyn_cast, so that "trial_seq" is available as an rtx_sequence * in
the conditional. Simplify the conditional by using methods of
"trial_seq".
2014-09-05 David Malcolm <dmalcolm@redhat.com>
* haifa-sched.c (check_clobbered_conditions): Strengthen local

13
gcc/reorg.c
View file

@ -3385,13 +3385,14 @@ relax_delay_slots (rtx_insn *first)
/* Similarly, if it is an unconditional jump with one insn in its
delay list and that insn is redundant, thread the jump. */
if (trial && GET_CODE (PATTERN (trial)) == SEQUENCE
&& XVECLEN (PATTERN (trial), 0) == 2
&& JUMP_P (XVECEXP (PATTERN (trial), 0, 0))
&& simplejump_or_return_p (XVECEXP (PATTERN (trial), 0, 0))
&& redundant_insn (XVECEXP (PATTERN (trial), 0, 1), insn, 0))
rtx_sequence *trial_seq =
trial ? dyn_cast <rtx_sequence *> (PATTERN (trial)) : NULL;
if (trial_seq
&& trial_seq->len () == 2
&& JUMP_P (trial_seq->insn (0))
&& simplejump_or_return_p (trial_seq->insn (0))
&& redundant_insn (trial_seq->insn (1), insn, 0))
{
rtx_sequence *trial_seq = as_a <rtx_sequence *> (PATTERN (trial));
target_label = JUMP_LABEL (trial_seq->insn (0));
if (ANY_RETURN_P (target_label))
target_label = find_end_label (target_label);