fix PR4633: cast to void should silence the 'unused expression' warning.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@77344 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/AST/Expr.cpp b/lib/AST/Expr.cpp
index 2c473eb..79ebb54 100644
--- a/lib/AST/Expr.cpp
+++ b/lib/AST/Expr.cpp
@@ -593,11 +593,10 @@
return true;
}
case CStyleCastExprClass:
- // If this is a cast to void, check the operand. Otherwise, the result of
- // the cast is unused.
+ // If this is an explicit cast to void, allow it. People do this when they
+ // think they know what they're doing :).
if (getType()->isVoidType())
- return cast<CastExpr>(this)->getSubExpr()
- ->isUnusedResultAWarning(Loc, R1, R2);
+ return false;
Loc = cast<CStyleCastExpr>(this)->getLParenLoc();
R1 = cast<CStyleCastExpr>(this)->getSubExpr()->getSourceRange();
return true;