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Fix bug in liveness analyzer

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This commit is contained in:
Alexey Andreev 2015-03-30 18:14:48 +04:00
parent 98247b9927
commit df8a3b8206
1 changed files with 7 additions and 1 deletions
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6
teavm-core/src/main/java/org/teavm/model/util/LivenessAnalyzer.java
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@ -15,6 +15,8 @@
*/
package org.teavm.model.util;
import com.carrotsearch.hppc.IntOpenHashSet;
import com.carrotsearch.hppc.IntSet;
import java.util.ArrayDeque;
import java.util.BitSet;
import java.util.Deque;
@ -51,17 +53,21 @@ public class LivenessAnalyzer {
BasicBlock block = program.basicBlockAt(i);
for (Instruction insn : block.getInstructions()) {
insn.acceptVisitor(usageExtractor);
IntSet usedVars = new IntOpenHashSet();
for (Variable var : usageExtractor.getUsedVariables()) {
Task task = new Task();
task.block = i;
task.var = var.getIndex();
stack.push(task);
usedVars.add(var.getIndex());
}
insn.acceptVisitor(defExtractor);
for (Variable var : defExtractor.getDefinedVariables()) {
if (!usedVars.contains(var.getIndex())) {
definitions[var.getIndex()] = i;
}
}
}
for (TryCatchBlock tryCatch : block.getTryCatchBlocks()) {
if (tryCatch.getExceptionVariable() != null) {
definitions[tryCatch.getExceptionVariable().getIndex()] = i;