[LTO API] add lto_codegen_set_should_internalize.

When debugging LTO issues with ld64, we use -save-temps to save the merged
optimized bitcode file, then invoke ld64 again on the single bitcode file.
The saved bitcode file is already internalized, so we can call
lto_codegen_set_should_internalize and skip running internalization again.

rdar://20227235

llvm-svn: 235211

1 files changed, 2 insertions, 1 deletions

diff --git a/llvm/lib/LTO/LTOCodeGenerator.cpp b/llvm/lib/LTO/LTOCodeGenerator.cpp
index b4a70119cc2..16718d7ce64 100644
--- a/llvm/lib/LTO/LTOCodeGenerator.cpp
+++ b/llvm/lib/LTO/LTOCodeGenerator.cpp
@@ -82,6 +82,7 @@ void LTOCodeGenerator::initialize() {
   DiagHandler = nullptr;
   DiagContext = nullptr;
   OwnedModule = nullptr;
+  ShouldInternalize = true;
 
   initializeLTOPasses();
 }
@@ -464,7 +465,7 @@ static void accumulateAndSortLibcalls(std::vector<StringRef> &Libcalls,
 }
 
 void LTOCodeGenerator::applyScopeRestrictions() {
-  if (ScopeRestrictionsDone)
+  if (ScopeRestrictionsDone || !ShouldInternalize)
     return;
   Module *mergedModule = IRLinker.getModule();