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cfgcleanup.c (try_crossjump_to_edge): Fix updating of liveness information.

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* cfgcleanup.c (try_crossjump_to_edge): Fix updating of liveness
	information.

From-SVN: r56916
This commit is contained in:
Zdenek Dvorak 2002-09-07 16:02:55 +02:00 committed by Zdenek Dvorak
parent 92d9256d25
commit 39587bb9f3
2 changed files with 11 additions and 22 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
2002-09-07 Zdenek Dvorak <rakdver@atrey.karlin.mff.cuni.cz>
* cfgcleanup.c (try_crossjump_to_edge): Fix updating of liveness
information.
2002-09-07 Graham Stott <graham.stott@btinternet.con>
* rtlanal.c (dead_or_set_regno_p): Fix typo.

28
gcc/cfgcleanup.c
View File

@ -1308,11 +1308,9 @@ try_crossjump_to_edge (mode, e1, e2)
{
int nmatch;
basic_block src1 = e1->src, src2 = e2->src;
basic_block redirect_to;
basic_block redirect_to, redirect_from, to_remove;
rtx newpos1, newpos2;
edge s;
rtx last;
rtx label;
/* Search backward through forwarder blocks. We don't need to worry
about multiple entry or chained forwarders, as they will be optimized
@ -1440,28 +1438,14 @@ try_crossjump_to_edge (mode, e1, e2)
if (GET_CODE (newpos1) == NOTE)
newpos1 = NEXT_INSN (newpos1);
last = src1->end;
/* Emit the jump insn. */
label = block_label (redirect_to);
emit_jump_insn_after (gen_jump (label), src1->end);
JUMP_LABEL (src1->end) = label;
LABEL_NUSES (label)++;
redirect_from = split_block (src1, PREV_INSN (newpos1))->src;
to_remove = redirect_from->succ->dest;
/* Delete the now unreachable instructions. */
delete_insn_chain (newpos1, last);
redirect_edge_and_branch_force (redirect_from->succ, redirect_to);
flow_delete_block (to_remove);
/* Make sure there is a barrier after the new jump. */
last = next_nonnote_insn (src1->end);
if (!last || GET_CODE (last) != BARRIER)
emit_barrier_after (src1->end);
/* Update CFG. */
while (src1->succ)
remove_edge (src1->succ);
make_single_succ_edge (src1, redirect_to, 0);
update_forwarder_flag (src1);
update_forwarder_flag (redirect_from);
return true;
}