From a219b3d8d1fd65b5b52ee47b026d092ad10c44ef Mon Sep 17 00:00:00 2001
From: Saleem Abdulrasool <compnerd@compnerd.org>
Date: Fri, 28 Jul 2017 03:39:19 +0000
Subject: MC: add support for cfi_return_column

This adds support for the CFI pseudo-op return_column.  This specifies
the frame table column which contains the return address.

Addresses PR33953!

llvm-svn: 309360
---
 llvm/lib/MC/MCStreamer.cpp | 6 ++++++
 1 file changed, 6 insertions(+)

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

diff --git a/llvm/lib/MC/MCStreamer.cpp b/llvm/lib/MC/MCStreamer.cpp
index 2bfb9a63eed..e35907f77e1 100644
--- a/llvm/lib/MC/MCStreamer.cpp
+++ b/llvm/lib/MC/MCStreamer.cpp
@@ -508,6 +508,12 @@ void MCStreamer::EmitCFIWindowSave() {
   CurFrame->Instructions.push_back(Instruction);
 }
 
+void MCStreamer::EmitCFIReturnColumn(int64_t Register) {
+  EnsureValidDwarfFrame();
+  MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
+  CurFrame->RAReg = Register;
+}
+
 void MCStreamer::EnsureValidWinFrameInfo() {
   const MCAsmInfo *MAI = Context.getAsmInfo();
   if (!MAI->usesWindowsCFI())
-- 
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