From 0d1b5268e8e1dc799c4b5734c0cb4a61168c58b7 Mon Sep 17 00:00:00 2001
From: Jay Foad <jay.foad@amd.com>
Date: Wed, 6 Jul 2022 14:00:32 +0100
Subject: [PATCH] [MachineVerifier] Try harder to verify LiveStacks

Verify the LiveStacks analysis after a pass that claims to preserve it,
even if there are no further passes (apart from the verifier itself)
that would use the analysis.

Differential Revision: https://reviews.llvm.org/D129200
---
 llvm/lib/CodeGen/MachineVerifier.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/llvm/lib/CodeGen/MachineVerifier.cpp b/llvm/lib/CodeGen/MachineVerifier.cpp
index db04f2b..7a008ba 100644
--- a/llvm/lib/CodeGen/MachineVerifier.cpp
+++ b/llvm/lib/CodeGen/MachineVerifier.cpp
@@ -293,6 +293,7 @@ namespace {
       }
 
     void getAnalysisUsage(AnalysisUsage &AU) const override {
+      AU.addUsedIfAvailable<LiveStacks>();
       AU.setPreservesAll();
       MachineFunctionPass::getAnalysisUsage(AU);
     }
-- 
2.7.4