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Propagation of data-types across signed comparisons

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This commit is contained in:
caheckman 2021-03-24 12:35:03 -04:00
parent c524ecfbe8
commit 193ad764e5
3 changed files with 38 additions and 0 deletions
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7
Ghidra/Features/Decompiler/src/decompile/cpp/coreaction.cc
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@ -4305,6 +4305,8 @@ bool ActionInferTypes::propagateGoodEdge(PcodeOp *op,int4 inslot,int4 outslot,Va
case CPUI_MULTIEQUAL:
if ((inslot!=-1)&&(outslot!=-1)) return false; // Must propagate input <-> output
break;
case CPUI_INT_SLESS:
case CPUI_INT_SLESSEQUAL:
case CPUI_INT_LESS:
case CPUI_INT_LESSEQUAL:
if ((inslot==-1)||(outslot==-1)) return false; // Must propagate input <-> input
@ -4400,6 +4402,11 @@ bool ActionInferTypes::propagateTypeEdge(TypeFactory *typegrp,PcodeOp *op,int4 i
else
newtype = alttype;
break;
case CPUI_INT_SLESS:
case CPUI_INT_SLESSEQUAL:
if (alttype->getMetatype() != TYPE_INT) return false; // Only propagate signed things
newtype = alttype;
break;
case CPUI_NEW:
{
Varnode *invn = op->getIn(0);