__real__ and __imag__ can be lvalues. Add support to ast and codegen for them.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@43525 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/AST/Expr.cpp b/AST/Expr.cpp
index 0c631df..b21aad2 100644
--- a/AST/Expr.cpp
+++ b/AST/Expr.cpp
@@ -278,6 +278,7 @@
/// - e->name
/// - *e, the type of e cannot be a function type
/// - string-constant
+/// - (__real__ e) and (__imag__ e) where e is an lvalue [GNU extension]
/// - reference type [C++ [expr]]
///
Expr::isLvalueResult Expr::isLvalue() const {
@@ -307,9 +308,13 @@
const MemberExpr *m = cast<MemberExpr>(this);
return m->isArrow() ? LV_Valid : m->getBase()->isLvalue();
}
- case UnaryOperatorClass: // C99 6.5.3p4
+ case UnaryOperatorClass:
if (cast<UnaryOperator>(this)->getOpcode() == UnaryOperator::Deref)
- return LV_Valid;
+ return LV_Valid; // C99 6.5.3p4
+
+ if (cast<UnaryOperator>(this)->getOpcode() == UnaryOperator::Real ||
+ cast<UnaryOperator>(this)->getOpcode() == UnaryOperator::Imag)
+ return cast<UnaryOperator>(this)->getSubExpr()->isLvalue(); // GNU.
break;
case ParenExprClass: // C99 6.5.1p5
return cast<ParenExpr>(this)->getSubExpr()->isLvalue();