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[clang][bytecode] Protect ia32_{lzcnt,tzcnt} against non-integers #110699

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Merged
merged 1 commit into from
Oct 2, 2024
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[clang][bytecode] Protect ia32_{lzcnt,tzcnt} against non-integers #110699

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8 changes: 8 additions & 0 deletions clang/lib/AST/ByteCode/InterpBuiltin.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -1205,6 +1205,10 @@ static bool interp__builtin_ia32_lzcnt(InterpState &S, CodePtr OpPC,
const InterpFrame *Frame,
const Function *Func,
const CallExpr *Call) {
QualType CallType = Call->getType();
if (!CallType->isIntegerType())
return false;

APSInt Val = peekToAPSInt(S.Stk, *S.Ctx.classify(Call->getArg(0)));
pushInteger(S, Val.countLeadingZeros(), Call->getType());
return true;
Expand All @@ -1214,6 +1218,10 @@ static bool interp__builtin_ia32_tzcnt(InterpState &S, CodePtr OpPC,
const InterpFrame *Frame,
const Function *Func,
const CallExpr *Call) {
QualType CallType = Call->getType();
if (!CallType->isIntegerType())
return false;

APSInt Val = peekToAPSInt(S.Stk, *S.Ctx.classify(Call->getArg(0)));
pushInteger(S, Val.countTrailingZeros(), Call->getType());
return true;
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