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Code Issues Releases Wiki Activity

Adjusting some guard analysis

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This commit is contained in:
caheckman 2020-02-19 13:41:05 -05:00
parent ed786460ca
commit 163fa4af57
4 changed files with 15 additions and 4 deletions
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Ghidra/Features/Decompiler/src/decompile/cpp/ruleaction.cc
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@ -2487,6 +2487,7 @@ int4 RuleZextEliminate::applyOp(PcodeOp *op,Funcdata &data)
if (!vn2->isConstant()) return 0;
zext = vn1->getDef();
if (!zext->getIn(0)->isHeritageKnown()) return 0;
if (vn1->loneDescend() != op) return 0; // Make sure extension is not used for anything else
smallsize = zext->getIn(0)->getSize();
val = vn2->getOffset();
if ((val>>(8*smallsize))==0) { // Is zero extension unnecessary