Add sanity checks
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48184 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Linker/LinkModules.cpp b/lib/Linker/LinkModules.cpp
index 53fce48..3d6e526 100644
--- a/lib/Linker/LinkModules.cpp
+++ b/lib/Linker/LinkModules.cpp
@@ -659,6 +659,11 @@
// The only allowed way is to link alias with external declaration.
if (DGV->isDeclaration()) {
+ // But only if aliasee is global too...
+ if (!isa<GlobalVariable>(DAliasee))
+ return Error(Err, "Global-Alias Collision on '" + SGA->getName() +
+ "': aliasee is not global variable");
+
NewGA = new GlobalAlias(SGA->getType(), SGA->getLinkage(),
SGA->getName(), DAliasee, Dest);
CopyGVAttributes(NewGA, SGA);
@@ -685,6 +690,11 @@
// The only allowed way is to link alias with external declaration.
if (DF->isDeclaration()) {
+ // But only if aliasee is function too...
+ if (!isa<Function>(DAliasee))
+ return Error(Err, "Function-Alias Collision on '" + SGA->getName() +
+ "': aliasee is not function");
+
NewGA = new GlobalAlias(SGA->getType(), SGA->getLinkage(),
SGA->getName(), DAliasee, Dest);
CopyGVAttributes(NewGA, SGA);