From 2caf64d562d4d8ecc75a8ae6c5348dbb6f8a5dbc Mon Sep 17 00:00:00 2001
From: Johannes Doerfert <johannes@jdoerfert.de>
Date: Sat, 24 Jun 2023 00:25:22 -0700
Subject: [PATCH] [Attributor] Avoid uninitialized memory read.

---
 llvm/include/llvm/Transforms/IPO/Attributor.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/llvm/include/llvm/Transforms/IPO/Attributor.h b/llvm/include/llvm/Transforms/IPO/Attributor.h
index 49fa9f8..a532309 100644
--- a/llvm/include/llvm/Transforms/IPO/Attributor.h
+++ b/llvm/include/llvm/Transforms/IPO/Attributor.h
@@ -5795,6 +5795,7 @@ template <Attribute::AttrKind AK>
 bool hasAssumedIRAttr(Attributor &A, const AbstractAttribute &QueryingAA,
                       const IRPosition &IRP, DepClassTy DepClass, bool &IsKnown,
                       bool IgnoreSubsumingPositions = false) {
+  IsKnown = false;
   switch (AK) {
 #define CASE(ATTRNAME, AANAME)                                                 \
   case Attribute::ATTRNAME: {                                                  \
-- 
2.7.4