[compiler-rt] [NFC][Asan] Fix warning in test (PR #155447)

[Vitaly Buka via llvm-commits]

https://github.com/vitalybuka created https://github.com/llvm/llvm-project/pull/155447

After #150028.


>From 5331868d5dba29a032468b40f1de112318fe7510 Mon Sep 17 00:00:00 2001
From: Vitaly Buka <vitalybuka at google.com>
Date: Tue, 26 Aug 2025 09:53:09 -0700
Subject: [PATCH] =?UTF-8?q?[=F0=9D=98=80=F0=9D=97=BD=F0=9D=97=BF]=20initia?=
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Created using spr 1.3.6
---
 compiler-rt/lib/asan/tests/asan_test.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/compiler-rt/lib/asan/tests/asan_test.cpp b/compiler-rt/lib/asan/tests/asan_test.cpp
index 2d054ee859ed4..92512c027e381 100644
--- a/compiler-rt/lib/asan/tests/asan_test.cpp
+++ b/compiler-rt/lib/asan/tests/asan_test.cpp
@@ -395,7 +395,8 @@ TEST(AddressSanitizer, ReallocTest) {
   }
   free(ptr);
   // Realloc pointer returned by malloc(0).
-  int *ptr2 = Ident((int*)malloc(0));
+  volatile void* ptr0 = malloc(0);
+  int *ptr2 = Ident((int*)ptr0);
   ptr2 = Ident((int*)realloc(ptr2, sizeof(*ptr2)));
   *ptr2 = 42;
   EXPECT_EQ(42, *ptr2);