[llvm] [ADT] Add const to operator== in ArrayRef.h (PR #161321)

[Kazu Hirata via llvm-commits]

https://github.com/kazutakahirata created https://github.com/llvm/llvm-project/pull/161321

While I am at it, this patch adds [[nodiscard]].


>From 4f703c656474539ba532dd1870e21d8a3f715526 Mon Sep 17 00:00:00 2001
From: Kazu Hirata <kazu at google.com>
Date: Sun, 28 Sep 2025 21:36:19 -0700
Subject: [PATCH] [ADT] Add const to operator== in ArrayRef.h

While I am at it, this patch adds [[nodiscard]].
---
 llvm/include/llvm/ADT/ArrayRef.h | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/llvm/include/llvm/ADT/ArrayRef.h b/llvm/include/llvm/ADT/ArrayRef.h
index fb91690bb0eb3..448d10013d371 100644
--- a/llvm/include/llvm/ADT/ArrayRef.h
+++ b/llvm/include/llvm/ADT/ArrayRef.h
@@ -547,7 +547,8 @@ namespace llvm {
   }
 
   template <typename T>
-  inline bool operator==(SmallVectorImpl<T> &LHS, ArrayRef<T> RHS) {
+  [[nodiscard]] inline bool operator==(const SmallVectorImpl<T> &LHS,
+                                       ArrayRef<T> RHS) {
     return ArrayRef<T>(LHS).equals(RHS);
   }
 
@@ -557,7 +558,8 @@ namespace llvm {
   }
 
   template <typename T>
-  inline bool operator!=(SmallVectorImpl<T> &LHS, ArrayRef<T> RHS) {
+  [[nodiscard]] inline bool operator!=(const SmallVectorImpl<T> &LHS,
+                                       ArrayRef<T> RHS) {
     return !(LHS == RHS);
   }