Fix part of PR12457. Patch by Justin Bogner!
llvm-svn: 183886
diff --git a/clang/lib/AST/ExprConstant.cpp b/clang/lib/AST/ExprConstant.cpp
index 21fb459..84f7bfd 100644
--- a/clang/lib/AST/ExprConstant.cpp
+++ b/clang/lib/AST/ExprConstant.cpp
@@ -5691,6 +5691,40 @@
return Success(Val.byteSwap(), E);
}
+ case Builtin::BI__builtin_clz:
+ case Builtin::BI__builtin_clzl:
+ case Builtin::BI__builtin_clzll: {
+ APSInt Val;
+ if (!EvaluateInteger(E->getArg(0), Val, Info))
+ return false;
+ if (!Val)
+ return Error(E);
+
+ return Success(Val.countLeadingZeros(), E);
+ }
+
+ case Builtin::BI__builtin_ctz:
+ case Builtin::BI__builtin_ctzl:
+ case Builtin::BI__builtin_ctzll: {
+ APSInt Val;
+ if (!EvaluateInteger(E->getArg(0), Val, Info))
+ return false;
+ if (!Val)
+ return Error(E);
+
+ return Success(Val.countTrailingZeros(), E);
+ }
+
+ case Builtin::BI__builtin_popcount:
+ case Builtin::BI__builtin_popcountl:
+ case Builtin::BI__builtin_popcountll: {
+ APSInt Val;
+ if (!EvaluateInteger(E->getArg(0), Val, Info))
+ return false;
+
+ return Success(Val.countPopulation(), E);
+ }
+
case Builtin::BI__builtin_classify_type:
return Success(EvaluateBuiltinClassifyType(E), E);