From f6265d1d4f95b9127df72dfcb57455e0e8577ff2 Mon Sep 17 00:00:00 2001
From: Kostya Kortchinsky <kostyak@google.com>
Date: Fri, 14 Jan 2022 13:50:37 -0800
Subject: [PATCH] [scudo] Make Scudo compile for C++20

In C++20 compound assignment to volatile (here `LocalData[I]++`) is
deprecated, so `mutex_test.cpp` fails to compile.

Simply changing it to `LocalData[I] = LocalData[I] + 1` fixes it.

Differential Revision: https://reviews.llvm.org/D117359
---
 lib/scudo/standalone/tests/mutex_test.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/scudo/standalone/tests/mutex_test.cpp b/lib/scudo/standalone/tests/mutex_test.cpp
index efee6fea2..d3242a3f5 100644
--- a/lib/scudo/standalone/tests/mutex_test.cpp
+++ b/lib/scudo/standalone/tests/mutex_test.cpp
@@ -43,7 +43,7 @@ class TestData {
   void backoff() {
     volatile T LocalData[Size] = {};
     for (scudo::u32 I = 0; I < Size; I++) {
-      LocalData[I]++;
+      LocalData[I] = LocalData[I] + 1;
       EXPECT_EQ(LocalData[I], 1U);
     }
   }