Implement codegen of aggregates as lvalues in binary expressions,
e.g. "(a = b).somefield".
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@55758 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/CGExpr.cpp b/lib/CodeGen/CGExpr.cpp
index e189349..cc5e705 100644
--- a/lib/CodeGen/CGExpr.cpp
+++ b/lib/CodeGen/CGExpr.cpp
@@ -99,6 +99,8 @@
switch (E->getStmtClass()) {
default: return EmitUnsupportedLValue(E, "l-value expression");
+ case Expr::BinaryOperatorClass:
+ return EmitBinaryOperatorLValue(cast<BinaryOperator>(E));
case Expr::CallExprClass: return EmitCallExprLValue(cast<CallExpr>(E));
case Expr::DeclRefExprClass: return EmitDeclRefLValue(cast<DeclRefExpr>(E));
case Expr::ParenExprClass:return EmitLValue(cast<ParenExpr>(E)->getSubExpr());
@@ -738,7 +740,7 @@
dyn_cast<const FunctionDecl>(DRExpr->getDecl()))
if (unsigned builtinID = FDecl->getIdentifier()->getBuiltinID())
return EmitBuiltinExpr(builtinID, E);
-
+
llvm::Value *Callee = EmitScalarExpr(E->getCallee());
return EmitCallExpr(Callee, E->getCallee()->getType(),
E->arg_begin(), E->arg_end());
@@ -752,6 +754,18 @@
return EmitCallExpr(Callee, FnExpr->getType(), ArgBeg, ArgEnd);
}
+LValue CodeGenFunction::EmitBinaryOperatorLValue(const BinaryOperator *E) {
+ // Can only get l-value for binary operator expressions which are a
+ // simple assignment of aggregate type.
+ if (E->getOpcode() != BinaryOperator::Assign)
+ return EmitUnsupportedLValue(E, "binary l-value expression");
+
+ llvm::Value *Temp = CreateTempAlloca(ConvertType(E->getType()));
+ EmitAggExpr(E, Temp, false);
+ // FIXME: Are these qualifiers correct?
+ return LValue::MakeAddr(Temp, E->getType().getCVRQualifiers());
+}
+
LValue CodeGenFunction::EmitCallExprLValue(const CallExpr *E) {
// Can only get l-value for call expression returning aggregate type
RValue RV = EmitCallExpr(E);