diff options
Diffstat (limited to 'clang/lib/AST/ExprConstant.cpp')
| -rw-r--r-- | clang/lib/AST/ExprConstant.cpp | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/clang/lib/AST/ExprConstant.cpp b/clang/lib/AST/ExprConstant.cpp index 7e596d0715c..0ce962e4194 100644 --- a/clang/lib/AST/ExprConstant.cpp +++ b/clang/lib/AST/ExprConstant.cpp @@ -8117,9 +8117,15 @@ bool IntExprEvaluator::VisitBuiltinCallExpr(const CallExpr *E, case Builtin::BI__builtin_classify_type: return Success((int)EvaluateBuiltinClassifyType(E, Info.getLangOpts()), E); - // FIXME: BI__builtin_clrsb - // FIXME: BI__builtin_clrsbl - // FIXME: BI__builtin_clrsbll + case Builtin::BI__builtin_clrsb: + case Builtin::BI__builtin_clrsbl: + case Builtin::BI__builtin_clrsbll: { + APSInt Val; + if (!EvaluateInteger(E->getArg(0), Val, Info)) + return false; + + return Success(Val.getBitWidth() - Val.getMinSignedBits(), E); + } case Builtin::BI__builtin_clz: case Builtin::BI__builtin_clzl: |
