Add back a fallback case for targets that do not or cannot implement getNoopForMachoTarget().

llvm-svn: 217899

1 files changed, 5 insertions, 1 deletions

diff --git a/llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp b/llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
index b26d8d6f101..4eb289afc18 100644
--- a/llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
+++ b/llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
@@ -802,7 +802,11 @@ void AsmPrinter::EmitFunctionBody() {
     MCInst Noop;
     TM.getSubtargetImpl()->getInstrInfo()->getNoopForMachoTarget(Noop);
     OutStreamer.AddComment("avoids zero-length function");
-    OutStreamer.EmitInstruction(Noop, getSubtargetInfo());
+
+    // Targets can opt-out of emitting the noop here by leaving the opcode
+    // unspecified.
+    if (Noop.getOpcode())
+      OutStreamer.EmitInstruction(Noop, getSubtargetInfo());
   }
 
   const Function *F = MF->getFunction();