From 2700d0d13ac28895b7271f81895ef60a7a5ebab6 Mon Sep 17 00:00:00 2001
From: Caroline Tice <cmtice@google.com>
Date: Mon, 9 Jan 2023 15:38:01 -0800
Subject: [PATCH] [AAUnderlyingObjects] Initialize an uninitialized boolean.

Recent commit introducing AA for getting underluying objects of a
pointer created an uninitialized boolean, which causes tests to fail
when built unter asan/ubsan. This initialized that variable.
---
 llvm/lib/Transforms/IPO/AttributorAttributes.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/llvm/lib/Transforms/IPO/AttributorAttributes.cpp b/llvm/lib/Transforms/IPO/AttributorAttributes.cpp
index 9c67a001..00c1c3e 100644
--- a/llvm/lib/Transforms/IPO/AttributorAttributes.cpp
+++ b/llvm/lib/Transforms/IPO/AttributorAttributes.cpp
@@ -11228,7 +11228,7 @@ struct AAUnderlyingObjectsImpl
 
     auto DoUpdate = [&](SmallSetVector<Value *, 8> &UnderlyingObjects,
                         AA::ValueScope Scope) {
-      bool UsedAssumedInformation;
+      bool UsedAssumedInformation = false;
       SmallPtrSet<Value *, 8> SeenObjects;
       SmallVector<AA::ValueAndContext> Values;
 
-- 
2.7.4