From 5db391c67d0922f4ab2ba57c07def19759c801a4 Mon Sep 17 00:00:00 2001
From: Daniel Dunbar <daniel@zuster.org>
Date: Wed, 16 Jan 2013 21:38:56 +0000
Subject: [IR] Add 'Append' and 'AppendUnique' module flag behaviors.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@172659 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Linker/LinkModules.cpp | 28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)

(limited to 'lib/Linker/LinkModules.cpp')

diff --git a/lib/Linker/LinkModules.cpp b/lib/Linker/LinkModules.cpp
index 1b4ef324d7..3b8928a324 100644
--- a/lib/Linker/LinkModules.cpp
+++ b/lib/Linker/LinkModules.cpp
@@ -1086,6 +1086,34 @@ bool ModuleLinker::linkModuleFlagsMetadata() {
       }
       continue;
     }
+    case Module::Append: {
+      MDNode *DstValue = cast<MDNode>(DstOp->getOperand(2));
+      MDNode *SrcValue = cast<MDNode>(SrcOp->getOperand(2));
+      unsigned NumOps = DstValue->getNumOperands() + SrcValue->getNumOperands();
+      Value **VP, **Values = VP = new Value*[NumOps];
+      for (unsigned i = 0, e = DstValue->getNumOperands(); i != e; ++i, ++VP)
+        *VP = DstValue->getOperand(i);
+      for (unsigned i = 0, e = SrcValue->getNumOperands(); i != e; ++i, ++VP)
+        *VP = SrcValue->getOperand(i);
+      DstOp->replaceOperandWith(2, MDNode::get(DstM->getContext(),
+                                               ArrayRef<Value*>(Values,
+                                                                NumOps)));
+      delete[] Values;
+      break;
+    }
+    case Module::AppendUnique: {
+      SmallSetVector<Value*, 16> Elts;
+      MDNode *DstValue = cast<MDNode>(DstOp->getOperand(2));
+      MDNode *SrcValue = cast<MDNode>(SrcOp->getOperand(2));
+      for (unsigned i = 0, e = DstValue->getNumOperands(); i != e; ++i)
+        Elts.insert(DstValue->getOperand(i));
+      for (unsigned i = 0, e = SrcValue->getNumOperands(); i != e; ++i)
+        Elts.insert(SrcValue->getOperand(i));
+      DstOp->replaceOperandWith(2, MDNode::get(DstM->getContext(),
+                                               ArrayRef<Value*>(Elts.begin(),
+                                                                Elts.end())));
+      break;
+    }
     }
   }
 
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