Support emitting .cfi_undefined in CodeGen

This will be used by AMDGPU.

Differential Revision: https://reviews.llvm.org/D74914

diff --git a/llvm/lib/CodeGen/AsmPrinter/AsmPrinterDwarf.cpp b/llvm/lib/CodeGen/AsmPrinter/AsmPrinterDwarf.cpp
index bd514e4..2a8ab09 100644 (file)
--- a/llvm/lib/CodeGen/AsmPrinter/AsmPrinterDwarf.cpp
+++ b/llvm/lib/CodeGen/AsmPrinter/AsmPrinterDwarf.cpp
@@ -245,6 +245,9 @@ void AsmPrinter::emitCFIInstruction(const MCCFIInstruction &Inst) const {
   case MCCFIInstruction::OpRestore:
     OutStreamer->emitCFIRestore(Inst.getRegister());
     break;
+  case MCCFIInstruction::OpUndefined:
+    OutStreamer->emitCFIUndefined(Inst.getRegister());
+    break;
   }
 }