[llvm-branch-commits] [clang] [UBSan] Support src:*=sanitize for multiple ignorelists. (PR #141640)

[Qinkun Bao via llvm-branch-commits]

https://github.com/qinkunbao updated https://github.com/llvm/llvm-project/pull/141640

>From cddba024f55d52e30d9c74369b3707b5fce64a20 Mon Sep 17 00:00:00 2001
From: Qinkun Bao <qinkun at google.com>
Date: Tue, 27 May 2025 17:34:51 +0000
Subject: [PATCH] Add some comments.

Created using spr 1.3.6
---
 clang/lib/Basic/NoSanitizeList.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/clang/lib/Basic/NoSanitizeList.cpp b/clang/lib/Basic/NoSanitizeList.cpp
index c58a67971dfb6..549bbda55e459 100644
--- a/clang/lib/Basic/NoSanitizeList.cpp
+++ b/clang/lib/Basic/NoSanitizeList.cpp
@@ -53,6 +53,8 @@ bool NoSanitizeList::containsFile(SanitizerMask Mask, StringRef FileName,
   // If we have two cases such as `src:a.cpp=sanitize` and `src:a.cpp`, the
   // current entry override the previous entry.
   if (SanLine > 0)
+    // std::pair uses lexicographic comparison. It will compare the file index
+    // first and then comapre the line number.
     return std::make_pair(NoSanFileIdx, NoSanLine) >
            std::make_pair(SanFileIdx, SanLine);
   return true;