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Do not put reload insns in the last empty BB.

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gcc/
	* lra.c (lra_process_new_insns): Don't put reload insns in the
	last empty BB.
This commit is contained in:
Vladimir N. Makarov 2020-11-15 11:22:19 -05:00
parent 26285af40f
commit 253c415a1a
1 changed files with 12 additions and 4 deletions
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16
gcc/lra.c
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@ -1903,15 +1903,23 @@ lra_process_new_insns (rtx_insn *insn, rtx_insn *before, rtx_insn *after,
{
/* We already made the edge no-critical in ira.c::ira */
lra_assert (!EDGE_CRITICAL_P (e));
rtx_insn *tmp = BB_HEAD (e->dest);
rtx_insn *curr, *tmp = BB_HEAD (e->dest);
if (LABEL_P (tmp))
tmp = NEXT_INSN (tmp);
if (NOTE_INSN_BASIC_BLOCK_P (tmp))
tmp = NEXT_INSN (tmp);
start_sequence ();
for (rtx_insn *curr = after;
curr != NULL_RTX;
for (curr = tmp;
curr != NULL
&& (!INSN_P (curr) || BLOCK_FOR_INSN (curr) == e->dest);
curr = NEXT_INSN (curr))
;
/* Do not put reload insns if it is the last BB
without actual insns. In this case the reload insns
can get null BB after emitting. */
if (curr == NULL)
continue;
start_sequence ();
for (curr = after; curr != NULL_RTX; curr = NEXT_INSN (curr))
emit_insn (copy_insn (PATTERN (curr)));
rtx_insn *copy = get_insns (), *last = get_last_insn ();
end_sequence ();