[IRLinker] make IRLinker::AddLazyFor optional (llvm::unique_function). NFC

2 of the 3 callsite of IRMover::move() pass empty lambda functions. Just
make this parameter llvm::unique_function.

Came about via discussion in D120781. Probably worth making this change
regardless of the resolution of D120781.

Reviewed By: dexonsmith

Differential Revision: https://reviews.llvm.org/D121630

1 files changed, 7 insertions, 5 deletions

diff --git a/llvm/lib/Linker/LinkModules.cpp b/llvm/lib/Linker/LinkModules.cpp
index f9f51bf..436c3eb 100644
--- a/llvm/lib/Linker/LinkModules.cpp
+++ b/llvm/lib/Linker/LinkModules.cpp
@@ -573,11 +573,13 @@ bool ModuleLinker::run() {
   // FIXME: Propagate Errors through to the caller instead of emitting
   // diagnostics.
   bool HasErrors = false;
-  if (Error E = Mover.move(std::move(SrcM), ValuesToLink.getArrayRef(),
-                           [this](GlobalValue &GV, IRMover::ValueAdder Add) {
-                             addLazyFor(GV, Add);
-                           },
-                           /* IsPerformingImport */ false)) {
+  if (Error E =
+          Mover.move(std::move(SrcM), ValuesToLink.getArrayRef(),
+                     IRMover::LazyCallback(
+                         [this](GlobalValue &GV, IRMover::ValueAdder Add) {
+                           addLazyFor(GV, Add);
+                         }),
+                     /* IsPerformingImport */ false)) {
     handleAllErrors(std::move(E), [&](ErrorInfoBase &EIB) {
       DstM.getContext().diagnose(LinkDiagnosticInfo(DS_Error, EIB.message()));
       HasErrors = true;