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beware of loops without Phis
[libfirm]
/
ir
/
opt
/
cfopt.c
diff --git
a/ir/opt/cfopt.c
b/ir/opt/cfopt.c
index
e5380d9
..
945767a
100644
(file)
--- a/
ir/opt/cfopt.c
+++ b/
ir/opt/cfopt.c
@@
-235,7
+235,7
@@
static void collect_nodes(ir_node *n, void *ctx) {
} else {
ir_node *b = get_nodes_block(n);
- if (op == op_Phi) {
+ if (op == op_Phi
&& get_irn_arity(n) > 0
) {
/* Collect Phi nodes to compact ins along with block's ins. */
set_irn_link(n, get_irn_link(b));
set_irn_link(b, n);