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Complete algorithm that creates subgraph to apply node splitting

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recursively
This commit is contained in:
Alexey Andreev 2015-03-01 22:25:07 +03:00
parent 7388a9af39
commit 77b42e677a
2 changed files with 75 additions and 23 deletions
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2
teavm-core/src/main/java/org/teavm/common/irreducible/GraphSplittingBackend.java
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@ -20,5 +20,5 @@ package org.teavm.common.irreducible;
* @author Alexey Andreev <konsoletyper@gmail.com>
*/
public interface GraphSplittingBackend {
int[] split(int[] nodes);
int[] split(int[] domain, int[] nodes);
}

96
teavm-core/src/main/java/org/teavm/common/irreducible/IrreducibleGraphConverter.java
View File

@ -15,9 +15,11 @@
*/
package org.teavm.common.irreducible;
import java.util.Arrays;
import org.teavm.common.*;
import com.carrotsearch.hppc.IntOpenHashSet;
import com.carrotsearch.hppc.IntSet;
import com.carrotsearch.hppc.cursors.IntCursor;
/**
* <p>Converts irreducible graph to reducible one using node splitting algorithm described at
@ -28,6 +30,7 @@ import com.carrotsearch.hppc.IntSet;
*/
public class IrreducibleGraphConverter {
private Graph cfg;
private int[] cfgWeight;
private GraphSplittingBackend backend;
public void convertToReducible(Graph cfg, int[] weight, GraphSplittingBackend backend) {
@ -37,6 +40,7 @@ public class IrreducibleGraphConverter {
identityNodeMap[i] = i;
}
this.cfg = cfg;
this.cfgWeight = weight;
handleLoops(new DJGraph(cfg, weight), identityNodeMap);
this.backend = null;
}
@ -121,35 +125,83 @@ public class IrreducibleGraphConverter {
}
// Split
int[] newNodes = splitStronglyConnectedComponent(domainNodes, scc, nodeMap);
// Construct DJ-subgraph
int[] newNodeMap = new int[1 + scc.length + newNodes.length];
for (int i = 0; i < scc.length; ++i) {
newNodeMap[i + 1] = nodeMap[scc[i]];
}
for (int i = 0; i < newNodes.length; ++i) {
newNodeMap[i + 1 + scc.length] = newNodes[i];
}
GraphBuilder builder = new GraphBuilder(newNodeMap.length);
for (int i = 0; i < scc.length; ++i) {
}
splitStronglyConnectedComponent(domainNodes, sharedDom, scc, nodeMap);
}
private int[] splitStronglyConnectedComponent(IntSet domain, int[] scc, int[] nodeMap) {
IntegerArray nonDomain = new IntegerArray(scc.length);
private void splitStronglyConnectedComponent(IntSet domain, int sharedDom, int[] scc, int[] nodeMap) {
// Find SCC \ domain
int[] mappedNonDomain = new int[scc.length - domain.size()];
int index = 0;
for (int node : scc) {
if (!domain.contains(node)) {
nonDomain.add(node);
mappedNonDomain[index++] = nodeMap[node];
}
}
int[] mappedNonDomain = new int[nonDomain.size()];
for (int i = 0; i < nonDomain.size(); ++i) {
mappedNonDomain[i] = nodeMap[nonDomain.get(i)];
int[] mappedDomain = new int[domain.size()];
index = 0;
for (IntCursor cursor : domain) {
mappedDomain[index++] = cursor.value;
}
return backend.split(mappedNonDomain);
// Delegate splitting to domain
int[] newNodes = backend.split(mappedDomain, mappedNonDomain);
// Calculate mappings
int[] newNodeMap = new int[1 + scc.length + newNodes.length];
int[] newNodeBackMap = new int[cfg.size()];
Arrays.fill(newNodeBackMap, -1);
newNodeMap[0] = nodeMap[sharedDom];
newNodeBackMap[sharedDom] = 0;
index = 1;
for (int i = 0; i < mappedDomain.length; ++i) {
newNodeMap[index] = mappedDomain[i];
newNodeBackMap[mappedDomain[i]] = index;
++index;
}
for (int i = 0; i < mappedNonDomain.length; ++i) {
newNodeMap[index] = mappedNonDomain[i];
newNodeBackMap[mappedNonDomain[i]] = index;
++index;
}
// Build subgraph with new nodes
GraphBuilder builder = new GraphBuilder(newNodeMap.length);
int[] mappedWeight = new int[newNodeMap.length];
mappedWeight[0] = cfgWeight[newNodeMap[0]];
for (int succ : cfg.outgoingEdges(sharedDom)) {
int j = newNodeBackMap[succ];
if (j >= 0) {
builder.addEdge(0, j);
}
}
for (int i = 1; i <= mappedDomain.length; ++i) {
mappedWeight[i] = cfgWeight[newNodeMap[i]];
for (int succ : cfg.outgoingEdges(mappedDomain[i])) {
int j = newNodeBackMap[succ];
if (j > mappedDomain.length) {
builder.addEdge(i, j);
} else if (j >= 0) {
builder.addEdge(i, j + mappedNonDomain.length);
}
}
}
for (int i = mappedDomain.length + 1; i <= scc.length; ++i) {
mappedWeight[i] = cfgWeight[newNodeMap[i]];
mappedWeight[i + mappedNonDomain.length] = cfgWeight[newNodeMap[i]];
for (int succ : cfg.outgoingEdges(mappedNonDomain[i])) {
int j = newNodeBackMap[succ];
if (j >= 0) {
builder.addEdge(i, j);
if (j > mappedDomain.length) {
builder.addEdge(i + mappedNonDomain.length, j);
} else {
builder.addEdge(i + mappedNonDomain.length, j + mappedNonDomain.length);
}
}
}
}
handleLoops(new DJGraph(builder.build(), mappedWeight), newNodeMap);
}
static class DJGraphNodeFilter implements GraphNodeFilter {