Enable CodeGen for member expressions based on call expressions returning aggregate types. This enables expressions like 'foo().member.submember'.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@45395 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 7 insertions, 0 deletions

diff --git a/CodeGen/CGExpr.cpp b/CodeGen/CGExpr.cpp
index 4cb897fe5d..84879bb28e 100644
--- a/CodeGen/CGExpr.cpp
+++ b/CodeGen/CGExpr.cpp
@@ -87,6 +87,7 @@ LValue CodeGenFunction::EmitLValue(const Expr *E) {
     return LValue::MakeAddr(llvm::UndefValue::get(Ty));
   }
 
+  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());
   case Expr::PreDefinedExprClass:
@@ -455,6 +456,12 @@ RValue CodeGenFunction::EmitCallExpr(const CallExpr *E) {
   return EmitCallExpr(Callee, E);
 }
 
+LValue CodeGenFunction::EmitCallExprLValue(const CallExpr *E) {
+  // Can only get l-value for call expression returning aggregate type
+  RValue RV = EmitCallExpr(E);
+  return LValue::MakeAddr(RV.getAggregateAddr());
+}
+
 RValue CodeGenFunction::EmitCallExpr(llvm::Value *Callee, const CallExpr *E) {
   // The callee type will always be a pointer to function type, get the function
   // type.