[PATCH] D103988: SampleFDO] place the discriminator flag variable into the used list.

[Rong Xu via Phabricator via llvm-commits]

xur updated this revision to Diff 351549.
xur edited the summary of this revision.

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D103988/new/

https://reviews.llvm.org/D103988

Files:
  llvm/lib/CodeGen/MIRFSDiscriminator.cpp


Index: llvm/lib/CodeGen/MIRFSDiscriminator.cpp
===================================================================
--- llvm/lib/CodeGen/MIRFSDiscriminator.cpp
+++ llvm/lib/CodeGen/MIRFSDiscriminator.cpp
@@ -132,8 +132,9 @@
     if (!M->getGlobalVariable(FSDiscriminatorVar)) {
       auto &Context = M->getContext();
       // Create a global variable to flag that FSDiscriminators are used.
+      // Using "common" linkage so that it will not gc GC'ed.
       new GlobalVariable(*M, Type::getInt1Ty(Context), true,
-                         GlobalValue::WeakAnyLinkage,
+                         GlobalValue::CommonLinkage,
                          ConstantInt::getTrue(Context), FSDiscriminatorVar);
     }
 


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