commit 57cd1b89cd91433ce1991a5bff36fe776a263796
author John McCall <rjmccall@apple.com> Wed Mar 28 23:30:44 2012 +0000
committer John McCall <rjmccall@apple.com> Wed Mar 28 23:30:44 2012 +0000
tree 9d65d25e15649b8487c5a4e9fda2910c1a7dce74
parent b684a42154a555206a33ac47a52ad2a306cfa2b4

When we can't prove that the target of an aggregate copy is
a complete object, the memcpy needs to use the data size of
the structure instead of its sizeof() value.  Fixes PR12204.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@153613 91177308-0d34-0410-b5e6-96231b3b80d8

lib/CodeGen/CGExprCXX.cpp

diff --git a/lib/CodeGen/CGExprCXX.cpp b/lib/CodeGen/CGExprCXX.cpp
index d3ba770..cefe7b6 100644
--- a/lib/CodeGen/CGExprCXX.cpp
+++ b/lib/CodeGen/CGExprCXX.cpp
@@ -781,7 +781,8 @@
       = AggValueSlot::forAddr(NewPtr, Alignment, AllocType.getQualifiers(),
                               AggValueSlot::IsDestructed,
                               AggValueSlot::DoesNotNeedGCBarriers,
-                              AggValueSlot::IsNotAliased);
+                              AggValueSlot::IsNotAliased,
+                              AggValueSlot::IsCompleteObject);
     CGF.EmitAggExpr(Init, Slot);
 
     CGF.MaybeEmitStdInitializerListCleanup(NewPtr, Init);