[cfe-commits] r72462 - in /cfe/trunk: lib/CodeGen/CGDecl.cpp test/CodeGenCXX/references.cpp

[Eli Friedman]

Author: efriedma
Date: Wed May 27 00:39:06 2009
New Revision: 72462

URL: http://llvm.org/viewvc/llvm-project?rev=72462&view=rev
Log:
Add IRGen support for local variables of reference type.


Modified:
    cfe/trunk/lib/CodeGen/CGDecl.cpp
    cfe/trunk/test/CodeGenCXX/references.cpp

Modified: cfe/trunk/lib/CodeGen/CGDecl.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CGDecl.cpp?rev=72462&r1=72461&r2=72462&view=diff

==============================================================================
--- cfe/trunk/lib/CodeGen/CGDecl.cpp (original)
+++ cfe/trunk/lib/CodeGen/CGDecl.cpp Wed May 27 00:39:06 2009
@@ -332,11 +332,6 @@
       DI->EmitDeclareOfAutoVariable(&D, DeclPtr, Builder);
   }
 
-  if (D.getType()->isReferenceType()) {
-    CGM.ErrorUnsupported(&D, "declaration with reference type");
-    return;
-  }
-  
   // If this local has an initializer, emit it now.
   if (const Expr *Init = D.getInit()) {
     llvm::Value *Loc = DeclPtr;
@@ -344,7 +339,10 @@
       bool needsCopyDispose = BlockRequiresCopying(Ty);
       Loc = Builder.CreateStructGEP(DeclPtr, needsCopyDispose*2+4, "x");
     }
-    if (!hasAggregateLLVMType(Init->getType())) {
+    if (Ty->isReferenceType()) {
+      llvm::Value *V = EmitReferenceBindingToExpr(Init, Ty).getScalarVal();
+      EmitStoreOfScalar(V, Loc, false, Ty);
+    } else if (!hasAggregateLLVMType(Init->getType())) {
       llvm::Value *V = EmitScalarExpr(Init);
       EmitStoreOfScalar(V, Loc, D.getType().isVolatileQualified(), 
                         D.getType());

Modified: cfe/trunk/test/CodeGenCXX/references.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/CodeGenCXX/references.cpp?rev=72462&r1=72461&r2=72462&view=diff

==============================================================================
--- cfe/trunk/test/CodeGenCXX/references.cpp (original)
+++ cfe/trunk/test/CodeGenCXX/references.cpp Wed May 27 00:39:06 2009
@@ -78,3 +78,9 @@
 int& reference_return() {
   return g;
 }
+
+int reference_decl() {
+  int& a = g;
+  const int& b = 1;
+  return a+b;
+}