diff --git a/llvm/lib/CodeGen/AsmPrinter/DebugHandlerBase.cpp b/llvm/lib/CodeGen/AsmPrinter/DebugHandlerBase.cpp
index 580f682..a362dd4 100644
--- a/llvm/lib/CodeGen/AsmPrinter/DebugHandlerBase.cpp
+++ b/llvm/lib/CodeGen/AsmPrinter/DebugHandlerBase.cpp
@@ -125,6 +125,21 @@
   return LabelsAfterInsn.lookup(MI);
 }
 
+// Return the function-local offset of an instruction.
+const MCExpr *
+DebugHandlerBase::getFunctionLocalOffsetAfterInsn(const MachineInstr *MI) {
+  MCContext &MC = Asm->OutContext;
+
+  MCSymbol *Start = Asm->getFunctionBegin();
+  const auto *StartRef = MCSymbolRefExpr::create(Start, MC);
+
+  MCSymbol *AfterInsn = getLabelAfterInsn(MI);
+  assert(AfterInsn && "Expected label after instruction");
+  const auto *AfterRef = MCSymbolRefExpr::create(AfterInsn, MC);
+
+  return MCBinaryExpr::createSub(AfterRef, StartRef, MC);
+}
+
 /// If this type is derived from a base type then return base type size.
 uint64_t DebugHandlerBase::getBaseTypeSize(const DITypeRef TyRef) {
   DIType *Ty = TyRef.resolve();