From 5a897b0abcc0e0e8ba1ee4f1a59b3d74c6d09e9c Mon Sep 17 00:00:00 2001
From: Marcus Holland-Moritz <github@mhxnet.de>
Date: Fri, 25 Jul 2025 17:18:13 +0200
Subject: [PATCH] test: work around clang optimizer bug on aarch64

---
 test/global_metadata_test.cpp | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/test/global_metadata_test.cpp b/test/global_metadata_test.cpp
index 8f8888d4..acfb15e6 100644
--- a/test/global_metadata_test.cpp
+++ b/test/global_metadata_test.cpp
@@ -70,6 +70,13 @@ TEST_F(global_metadata_test, check_empty_tables) {
   EXPECT_THAT([&] { check(raw); }, throws_error("empty modes table"));
 }
 
+// On aarch64, Clang will wrongly optimize away some of the assignments
+// in this test, leading to false positives. I'm pretty sure this is a bug
+// in Clang, need to reproduce it and file a bug report.
+#if defined(__clang__) && defined(__aarch64__)
+#pragma clang optimize off
+#endif
+
 TEST_F(global_metadata_test, check_index_range) {
   metadata raw;
   raw.directories()->resize(1);
@@ -138,6 +145,10 @@ TEST_F(global_metadata_test, check_index_range) {
   EXPECT_THAT([&] { check(raw); }, throws_error("inode_num out of range"));
 }
 
+#if defined(__clang__) && defined(__aarch64__)
+#pragma clang optimize on
+#endif
+
 TEST_F(global_metadata_test, check_packed_tables) {
   metadata raw;
   raw.inodes()->resize(2);