Cloning: Copy comdats when cloning globals.
Differential Revision: https://reviews.llvm.org/D28838
llvm-svn: 292430
diff --git a/llvm/lib/Transforms/Utils/CloneModule.cpp b/llvm/lib/Transforms/Utils/CloneModule.cpp
index 7ebeb61..4e9d672 100644
--- a/llvm/lib/Transforms/Utils/CloneModule.cpp
+++ b/llvm/lib/Transforms/Utils/CloneModule.cpp
@@ -20,6 +20,15 @@
#include "llvm-c/Core.h"
using namespace llvm;
+static void copyComdat(GlobalObject *Dst, const GlobalObject *Src) {
+ const Comdat *SC = Src->getComdat();
+ if (!SC)
+ return;
+ Comdat *DC = Dst->getParent()->getOrInsertComdat(SC->getName());
+ DC->setSelectionKind(SC->getSelectionKind());
+ Dst->setComdat(DC);
+}
+
/// This is not as easy as it might seem because we have to worry about making
/// copies of global variables and functions, and making their (initializers and
/// references, respectively) refer to the right globals.
@@ -124,6 +133,8 @@
I->getAllMetadata(MDs);
for (auto MD : MDs)
GV->addMetadata(MD.first, *MapMetadata(MD.second, VMap));
+
+ copyComdat(GV, &*I);
}
// Similarly, copy over function bodies now...
@@ -153,6 +164,8 @@
if (I.hasPersonalityFn())
F->setPersonalityFn(MapValue(I.getPersonalityFn(), VMap));
+
+ copyComdat(F, &I);
}
// And aliases