[cfe-commits] r89944 - /cfe/trunk/lib/CodeGen/CGCXX.cpp

[Eli Friedman]

Author: efriedma
Date: Thu Nov 26 01:45:48 2009
New Revision: 89944

URL: http://llvm.org/viewvc/llvm-project?rev=89944&view=rev
Log:
Shortcut explicit calls to a trivial copy assignment operator.


Modified:
    cfe/trunk/lib/CodeGen/CGCXX.cpp

Modified: cfe/trunk/lib/CodeGen/CGCXX.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CGCXX.cpp?rev=89944&r1=89943&r2=89944&view=diff

==============================================================================
--- cfe/trunk/lib/CodeGen/CGCXX.cpp (original)
+++ cfe/trunk/lib/CodeGen/CGCXX.cpp Thu Nov 26 01:45:48 2009
@@ -270,6 +270,14 @@
     This = BaseLV.getAddress();
   }
 
+  if (MD->isCopyAssignment() && MD->isTrivial()) {
+    // We don't like to generate the trivial copy assignment operator when
+    // it isn't necessary; just produce the proper effect here.
+    llvm::Value *RHS = EmitLValue(*CE->arg_begin()).getAddress();
+    EmitAggregateCopy(This, RHS, CE->getType());
+    return RValue::get(This);
+  }
+
   // C++ [class.virtual]p12:
   //   Explicit qualification with the scope operator (5.1) suppresses the
   //   virtual call mechanism.