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

1 files changed, 5 insertions, 4 deletions

diff --git a/lib/CodeGen/CGException.cpp b/lib/CodeGen/CGException.cpp
index 95e0030866..dcb921261a 100644
--- a/lib/CodeGen/CGException.cpp
+++ b/lib/CodeGen/CGException.cpp
@@ -373,8 +373,7 @@ static void EmitAnyExprToExn(CodeGenFunction &CGF, const Expr *e,
   // evaluated but before the exception is caught.  But the best way
   // to handle that is to teach EmitAggExpr to do the final copy
   // differently if it can't be elided.
-  CGF.EmitAnyExprToMem(e, typedAddr, e->getType().getQualifiers(), 
-                       /*IsInit*/ true);
+  CGF.EmitAnyExprToMem(e, typedAddr, e->getType().getQualifiers());
 
   // Deactivate the cleanup block.
   CGF.DeactivateCleanupBlock(cleanup, cast<llvm::Instruction>(typedAddr));
@@ -1048,7 +1047,8 @@ static void InitCatchParam(CodeGenFunction &CGF,
   if (!copyExpr) {
     llvm::Value *rawAdjustedExn = CallBeginCatch(CGF, Exn, true);
     llvm::Value *adjustedExn = CGF.Builder.CreateBitCast(rawAdjustedExn, PtrTy);
-    CGF.EmitAggregateCopy(ParamAddr, adjustedExn, CatchType);
+    CGF.EmitAggregateCopy(ParamAddr, adjustedExn, CatchType,
+                          /*volatile*/ false, 0, /*destIsCompleteObject*/ true);
     return;
   }
 
@@ -1076,7 +1076,8 @@ static void InitCatchParam(CodeGenFunction &CGF,
                   AggValueSlot::forAddr(ParamAddr, Alignment, Qualifiers(),
                                         AggValueSlot::IsNotDestructed,
                                         AggValueSlot::DoesNotNeedGCBarriers,
-                                        AggValueSlot::IsNotAliased));
+                                        AggValueSlot::IsNotAliased,
+                                        AggValueSlot::IsCompleteObject));
 
   // Leave the terminate scope.
   CGF.EHStack.popTerminate();