Linker needs to do deep-copy of function-local metadata to update references to function arguments
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@94632 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Linker/LinkModules.cpp b/lib/Linker/LinkModules.cpp
index e2cd47a..ac11450 100644
--- a/lib/Linker/LinkModules.cpp
+++ b/lib/Linker/LinkModules.cpp
@@ -392,7 +392,19 @@
assert(!isa<GlobalValue>(CPV) && "Unmapped global?");
llvm_unreachable("Unknown type of derived type constant value!");
}
- } else if (isa<MDNode>(In) || isa<MDString>(In)) {
+ } else if (const MDNode *MD = dyn_cast<MDNode>(In)) {
+ if (MD->isFunctionLocal()) {
+ SmallVector<Value*, 4> Elts;
+ for (unsigned i = 0, e = MD->getNumOperands(); i != e; ++i) {
+ Value *Op = MD->getOperand(i);
+ // LinkFunctionBody() already handled non-argument values.
+ Elts.push_back(isa<Argument>(Op) ? RemapOperand(Op, ValueMap) : Op);
+ }
+ Result = MDNode::get(In->getContext(), Elts.data(), MD->getNumOperands());
+ } else {
+ Result = const_cast<Value*>(In);
+ }
+ } else if (isa<MDString>(In)) {
Result = const_cast<Value*>(In);
} else if (isa<InlineAsm>(In)) {
Result = const_cast<Value*>(In);