[LTO] Constify the Module Hook function (NFC)

It use to be non-const for the sole purpose of custom handling of
commons symbol. This is moved now in the regular LTO handling now
and such we can constify the callback.

llvm-svn: 279438

1 files changed, 1 insertions, 1 deletions

diff --git a/llvm/lib/LTO/LTOBackend.cpp b/llvm/lib/LTO/LTOBackend.cpp
index a89364e46a0..732f35a56b2 100644
--- a/llvm/lib/LTO/LTOBackend.cpp
+++ b/llvm/lib/LTO/LTOBackend.cpp
@@ -47,7 +47,7 @@ Error Config::addSaveTemps(std::string OutputFileName,
   auto setHook = [&](std::string PathSuffix, ModuleHookFn &Hook) {
     // Keep track of the hook provided by the linker, which also needs to run.
     ModuleHookFn LinkerHook = Hook;
-    Hook = [=](unsigned Task, Module &M) {
+    Hook = [=](unsigned Task, const Module &M) {
       // If the linker's hook returned false, we need to pass that result
       // through.
       if (LinkerHook && !LinkerHook(Task, M))