ra: Don't put a node in its own adjacency set.
All the paths looping over adjacency had guards against considering themselves (the non-obvious one was ra_any_neighbors_conflict(), which has in_stack set). Reviewed-by: Nicolai Hähnle <nicolai.haehnle@amd.com>
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@ -392,11 +392,11 @@ ra_add_node_adjacency(struct ra_graph *g, unsigned int n1, unsigned int n2)
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{
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BITSET_SET(g->nodes[n1].adjacency, n2);
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if (n1 != n2) {
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assert(n1 != n2);
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int n1_class = g->nodes[n1].class;
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int n2_class = g->nodes[n2].class;
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g->nodes[n1].q_total += g->regs->classes[n1_class]->q[n2_class];
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}
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if (g->nodes[n1].adjacency_count >=
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g->nodes[n1].adjacency_list_size) {
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@ -433,7 +433,6 @@ ra_alloc_interference_graph(struct ra_regs *regs, unsigned int count)
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g->nodes[i].adjacency_count = 0;
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g->nodes[i].q_total = 0;
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ra_add_node_adjacency(g, i, i);
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g->nodes[i].reg = NO_REG;
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}
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@ -451,7 +450,7 @@ void
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ra_add_node_interference(struct ra_graph *g,
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unsigned int n1, unsigned int n2)
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{
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if (!BITSET_TEST(g->nodes[n1].adjacency, n2)) {
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if (n1 != n2 && !BITSET_TEST(g->nodes[n1].adjacency, n2)) {
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ra_add_node_adjacency(g, n1, n2);
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ra_add_node_adjacency(g, n2, n1);
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}
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@ -475,7 +474,7 @@ decrement_q(struct ra_graph *g, unsigned int n)
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unsigned int n2 = g->nodes[n].adjacency_list[i];
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unsigned int n2_class = g->nodes[n2].class;
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if (n != n2 && !g->nodes[n2].in_stack) {
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if (!g->nodes[n2].in_stack) {
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assert(g->nodes[n2].q_total >= g->regs->classes[n2_class]->q[n_class]);
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g->nodes[n2].q_total -= g->regs->classes[n2_class]->q[n_class];
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}
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@ -661,12 +660,10 @@ ra_get_spill_benefit(struct ra_graph *g, unsigned int n)
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*/
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for (j = 0; j < g->nodes[n].adjacency_count; j++) {
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unsigned int n2 = g->nodes[n].adjacency_list[j];
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if (n != n2) {
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unsigned int n2_class = g->nodes[n2].class;
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benefit += ((float)g->regs->classes[n_class]->q[n2_class] /
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g->regs->classes[n_class]->p);
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}
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}
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return benefit;
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}
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