From 6375a63fcb5c41a2a1a20f0a7654b50b23073266 Mon Sep 17 00:00:00 2001
From: Matt Arsenault <Matthew.Arsenault@amd.com>
Date: Mon, 25 Mar 2019 16:47:42 +0000
Subject: [PATCH] AMDGPU: Preserve LiveIntervals in WQM

This seems to already be done, but wasn't marked.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@356922 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Target/AMDGPU/SIWholeQuadMode.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/lib/Target/AMDGPU/SIWholeQuadMode.cpp b/lib/Target/AMDGPU/SIWholeQuadMode.cpp
index dae7d455d82..03c0353390f 100644
--- a/lib/Target/AMDGPU/SIWholeQuadMode.cpp
+++ b/lib/Target/AMDGPU/SIWholeQuadMode.cpp
@@ -200,6 +200,8 @@ public:
 
   void getAnalysisUsage(AnalysisUsage &AU) const override {
     AU.addRequired<LiveIntervals>();
+    AU.addPreserved<SlotIndexes>();
+    AU.addPreserved<LiveIntervals>();
     AU.setPreservesCFG();
     MachineFunctionPass::getAnalysisUsage(AU);
   }
-- 
2.50.1