From 8ec88ba58866a840a27ab5172fd2b954780b52f3 Mon Sep 17 00:00:00 2001
From: Cameron Zwarich <zwarich@apple.com>
Date: Mon, 20 Dec 2010 00:08:10 +0000
Subject: [PATCH] Ignore debug values when performing MachineVerifier liveness
 checks. Fixes PR8822.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122207 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/CodeGen/MachineVerifier.cpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/lib/CodeGen/MachineVerifier.cpp b/lib/CodeGen/MachineVerifier.cpp
index f7713fd1eec..4025e296ce0 100644
--- a/lib/CodeGen/MachineVerifier.cpp
+++ b/lib/CodeGen/MachineVerifier.cpp
@@ -587,7 +587,9 @@ MachineVerifier::visitMachineOperand(const MachineOperand *MO, unsigned MONum) {
       return;
 
     // Check Live Variables.
-    if (MO->isUndef()) {
+    if (MI->isDebugValue()) {
+      // Liveness checks are not valid for debug values.
+    } else if (MO->isUndef()) {
       // An <undef> doesn't refer to any register, so just skip it.
     } else if (MO->isUse()) {
       regsLiveInButUnused.erase(Reg);
-- 
2.34.1