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GP-2563 SplitDatatype transformer

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This commit is contained in:
caheckman 2023-04-03 19:47:17 -04:00
parent 269ea1ae7a
commit bdf1314b4f
28 changed files with 1699 additions and 161 deletions
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15
Ghidra/Features/Decompiler/src/decompile/cpp/funcdata.cc
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@ -888,6 +888,21 @@ bool Funcdata::setUnionField(const Datatype *parent,const PcodeOp *op,int4 slot,
}
(*res.first).second = resolve;
}
if (op->code() == CPUI_MULTIEQUAL && slot >= 0) {
// Data-type propagation doesn't happen between MULTIEQUAL input slots holding the same Varnode
// So if this is a MULTIEQUAL, copy resolution to any other input slots holding the same Varnode
const Varnode *vn = op->getIn(slot); // The Varnode being directly set
for(int4 i=0;i<op->numInput();++i) {
if (i == slot) continue;
if (op->getIn(i) != vn) continue; // Check that different input slot holds same Varnode
ResolveEdge dupedge(parent,op,i);
res = unionMap.emplace(dupedge,resolve);
if (!res.second) {
if (!(*res.first).second.isLocked())
(*res.first).second = resolve;
}
}
}
return true;
}