From c8fec7e21f5c24303eab8a8592f3b8faff347d86 Mon Sep 17 00:00:00 2001
From: Rafael Espindola <rafael.espindola@gmail.com>
Date: Fri, 23 Nov 2012 16:59:41 +0000
Subject: Implement .cfi_undefined. Based on a patch from PaX team, updated by
 Roman Divacky. I just added the testcase.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168520 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/MC/MCStreamer.cpp | 9 +++++++++
 1 file changed, 9 insertions(+)

(limited to 'lib/MC/MCStreamer.cpp')

diff --git a/lib/MC/MCStreamer.cpp b/lib/MC/MCStreamer.cpp
index afece0ba55..02e1028ada 100644
--- a/lib/MC/MCStreamer.cpp
+++ b/lib/MC/MCStreamer.cpp
@@ -367,6 +367,15 @@ void MCStreamer::EmitCFISignalFrame() {
   CurFrame->IsSignalFrame = true;
 }
 
+void MCStreamer::EmitCFIUndefined(int64_t Register) {
+  EnsureValidFrame();
+  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
+  MCSymbol *Label = getContext().CreateTempSymbol();
+  EmitLabel(Label);
+  MCCFIInstruction Instruction(MCCFIInstruction::Undefined, Label, Register);
+  CurFrame->Instructions.push_back(Instruction);
+}
+
 void MCStreamer::setCurrentW64UnwindInfo(MCWin64EHUnwindInfo *Frame) {
   W64UnwindInfos.push_back(Frame);
   CurrentW64UnwindInfo = W64UnwindInfos.back();
-- 
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