[asan] use GlobalValue::PrivateLinkage for coverage guard to save quite a bit of code size
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@194800 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Transforms/Instrumentation/AddressSanitizer.cpp b/lib/Transforms/Instrumentation/AddressSanitizer.cpp
index 77e9e0e..d8c3f8e 100644
--- a/lib/Transforms/Instrumentation/AddressSanitizer.cpp
+++ b/lib/Transforms/Instrumentation/AddressSanitizer.cpp
@@ -1187,7 +1187,7 @@
IRBuilder<> IRB(F.getEntryBlock().getFirstInsertionPt());
Type *Int8Ty = IRB.getInt8Ty();
GlobalVariable *Guard = new GlobalVariable(
- *F.getParent(), Int8Ty, false, F.getLinkage(),
+ *F.getParent(), Int8Ty, false, GlobalValue::PrivateLinkage,
Constant::getNullValue(Int8Ty), "__asan_gen_cov_" + F.getName());
LoadInst *Load = IRB.CreateLoad(Guard);
Load->setAtomic(Monotonic);