1 files changed, 18 insertions, 0 deletions
diff --git a/llvm/lib/IR/Globals.cpp b/llvm/lib/IR/Globals.cpp
index da1b6c5e0c9..20b2334a626 100644
--- a/llvm/lib/IR/Globals.cpp
+++ b/llvm/lib/IR/Globals.cpp
@@ -281,6 +281,24 @@ Optional<ConstantRange> GlobalValue::getAbsoluteSymbolRange() const {
   return getConstantRangeFromMetadata(*MD);
 }
 
+bool GlobalValue::canBeOmittedFromSymbolTable() const {
+  if (!hasLinkOnceODRLinkage())
+    return false;
+
+  // We assume that anyone who sets global unnamed_addr on a non-constant
+  // knows what they're doing.
+  if (hasGlobalUnnamedAddr())
+    return true;
+
+  // If it is a non constant variable, it needs to be uniqued across shared
+  // objects.
+  if (auto *Var = dyn_cast<GlobalVariable>(this))
+    if (!Var->isConstant())
+      return false;
+
+  return hasAtLeastLocalUnnamedAddr();
+}
+
 //===----------------------------------------------------------------------===//
 // GlobalVariable Implementation
 //===----------------------------------------------------------------------===//