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register usage detection - do not walk dead code

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This commit is contained in:
Jindra Petřík
2021-02-03 07:27:22 +01:00
parent bfd750874b
commit 322991be68
1 changed files with 15 additions and 6 deletions
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21
libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/abc/avm2/graph/AVM2Graph.java
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@@ -537,17 +537,26 @@ public class AVM2Graph extends Graph {
Map<Integer, Integer> setLocalPosToRegisterId = new HashMap<>();
for (int ip = 0; ip < avm2code.code.size(); ip++) {
AVM2Instruction ins = avm2code.code.get(ip);
if (ins.definition instanceof SetLocalTypeIns) {
int regId = ((SetLocalTypeIns) ins.definition).getRegisterId(ins);
setLocalPosToGetLocalPos.put(ip, new TreeSet<>());
setLocalPosToRegisterId.put(ip, regId);
for (GraphPart p : allParts) {
if (p.start < 0) {
continue;
}
for (int ip = p.start; ip <= p.end; ip++) {
AVM2Instruction ins = avm2code.code.get(ip);
if (ins.definition instanceof SetLocalTypeIns) {
int regId = ((SetLocalTypeIns) ins.definition).getRegisterId(ins);
setLocalPosToGetLocalPos.put(ip, new TreeSet<>());
setLocalPosToRegisterId.put(ip, regId);
}
}
}
for (int ip : setLocalPosToGetLocalPos.keySet()) {
GraphPart part = searchPart(ip + 1, allParts);
if (part == null) { //might be last part of script (?)
continue;
}
walkLocalRegsUsage(localData, setLocalPosToGetLocalPos.get(ip), part, part, new HashSet<>(), ip + 1, setLocalPosToRegisterId.get(ip));
}