From 4ae1740b871ebb63ca59e2fd3d314b6ebea7102e Mon Sep 17 00:00:00 2001
From: Nikita Popov <nikita.ppv@gmail.com>
Date: Sat, 20 Jun 2020 12:52:53 +0200
Subject: [PATCH] [JumpThreading] Make test more robust (NFC)

Optimizing away this comparison is not the point of this test,
so make sure it cannot be optimized away.
---
 llvm/test/Transforms/JumpThreading/combine-metadata.ll | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/llvm/test/Transforms/JumpThreading/combine-metadata.ll b/llvm/test/Transforms/JumpThreading/combine-metadata.ll
index 39ac9a026766..4ed6cfecc59a 100644
--- a/llvm/test/Transforms/JumpThreading/combine-metadata.ll
+++ b/llvm/test/Transforms/JumpThreading/combine-metadata.ll
@@ -108,7 +108,7 @@ d2:
 d3:
   %y = load i32*, i32** %ptr
   store i32 1, i32* %y
-  %c2 = icmp eq i32* %y, null
+  %c2 = icmp eq i32* %y, @p
   br i1 %c2, label %ret1, label %ret2
 
 ret1:
@@ -118,5 +118,6 @@ ret2:
   ret void
 }
 
+@p = external global i32
 
 !0 = !{}