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[qfcc] Add attached node's parents to source edges

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The assignment to the node's variable must come after any uses of that
node, which the node's parent set indicates. In the swap test, this was
not a problem as the node had no parents, and in the link order test, it
just happened(?) to work.
This commit is contained in:
Bill Currie 2021-12-28 09:23:14 +09:00
parent 5f4a330b02
commit 44c48feb56
1 changed files with 3 additions and 0 deletions
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3
tools/qfcc/source/dags.c
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@ -659,7 +659,10 @@ dagnode_attach_label (dag_t *dag, dagnode_t *n, daglabel_t *l)
return 0; return 0;
} }
// this assignment to the variable must come after any previous uses,
// which includes itself and its parents
set_add (n->edges, node->number); set_add (n->edges, node->number);
set_union (n->edges, node->parents);
dagnode_set_reachable (dag, n); dagnode_set_reachable (dag, n);
} }
l->live = 0; // remove live forcing on assignment l->live = 0; // remove live forcing on assignment