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[taken from gcc-2.95.3-latest-cvs]

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2001-03-28  Bernd Schmidt  <bernds@redhat.com>
	* jump.c (jump_optimize_1): Move call to delete_barrier_successors to
	a point where JUMP_LABELS and LABEL_NUSES are set up properly.
	(delete_barrier_successors): If deleting a table jump, delete the case
	vector as well.


git-svn-id: file:///srv/svn/repos/haiku/trunk/buildtools@9594 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Oliver Tappe 2004-10-28 18:23:18 +00:00
parent 48228ca39b
commit da36187c7a
1 changed files with 20 additions and 3 deletions
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23
gcc/gcc/jump.c
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@ -200,8 +200,6 @@ jump_optimize_1 (f, cross_jump, noop_moves, after_regscan, mark_labels_only)
if (flag_exceptions && cross_jump)
init_insn_eh_region (f, max_uid);
delete_barrier_successors (f);
/* Leave some extra room for labels and duplicate exit test insns
we make. */
max_jump_chain = max_uid * 14 / 10;
@ -224,6 +222,8 @@ jump_optimize_1 (f, cross_jump, noop_moves, after_regscan, mark_labels_only)
for (insn = exception_handler_labels; insn; insn = XEXP (insn, 1))
LABEL_NUSES (XEXP (insn, 0))++;
delete_barrier_successors (f);
/* Quit now if we just wanted to rebuild the JUMP_LABEL and REG_LABEL
notes and recompute LABEL_NUSES. */
if (mark_labels_only)
@ -2139,7 +2139,24 @@ delete_barrier_successors (f)
insn = NEXT_INSN (insn);
while (insn != 0 && GET_CODE (insn) != CODE_LABEL)
{
if (GET_CODE (insn) == NOTE
if (GET_CODE (insn) == JUMP_INSN)
{
/* Detect when we're deleting a tablejump; get rid of
the jump table as well. */
rtx next1 = next_nonnote_insn (insn);
rtx next2 = next1 ? next_nonnote_insn (next1) : 0;
if (next2 && GET_CODE (next1) == CODE_LABEL
&& GET_CODE (next2) == JUMP_INSN
&& (GET_CODE (PATTERN (next2)) == ADDR_VEC
|| GET_CODE (PATTERN (next2)) == ADDR_DIFF_VEC))
{
delete_insn (insn);
insn = next2;
}
else
insn = delete_insn (insn);
}
else if (GET_CODE (insn) == NOTE
&& NOTE_LINE_NUMBER (insn) != NOTE_INSN_FUNCTION_END)
insn = NEXT_INSN (insn);
else