[compiler-rt] [DataflowSanitizer] Use nullptr instead of NULL or 0 (PR #85986)

[via llvm-commits]

github-actions[bot] wrote:

<!--LLVM CODE FORMAT COMMENT: {clang-format}-->


:warning: C/C++ code formatter, clang-format found issues in your code. :warning:

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``````````bash
git-clang-format --diff 891172d9be01dd7c7e5298f2d8fdb143add448da c1142da8557b5c32eef0b0122fee4552911b48ea -- compiler-rt/lib/dfsan/dfsan_allocator.cpp
``````````

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<details>
<summary>
View the diff from clang-format here.
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``````````diff
diff --git a/compiler-rt/lib/dfsan/dfsan_allocator.cpp b/compiler-rt/lib/dfsan/dfsan_allocator.cpp
index d382501eb9..282e523345 100644
--- a/compiler-rt/lib/dfsan/dfsan_allocator.cpp
+++ b/compiler-rt/lib/dfsan/dfsan_allocator.cpp
@@ -91,47 +91,48 @@ void DFsanThreadLocalMallocStorage::CommitBack() {
 static void *DFsanAllocate(uptr size, uptr alignment, bool zeroise) {
   if (size > max_malloc_size) {
     if (AllocatorMayReturnNull()) {
-  Report("WARNING: DataflowSanitizer failed to allocate 0x%zx bytes\n",
-         size);
-  return nullptr;
-}
+      Report("WARNING: DataflowSanitizer failed to allocate 0x%zx bytes\n",
+             size);
+      return nullptr;
+    }
 
-if (AllocatorMayReturnNull())
-  return nullptr;
+    if (AllocatorMayReturnNull())
+      return nullptr;
 
-if (AllocatorMayReturnNull())
-  return nullptr;
+    if (AllocatorMayReturnNull())
+      return nullptr;
 
-if (AllocatorMayReturnNull())
-  return nullptr;
+    if (AllocatorMayReturnNull())
+      return nullptr;
 
-if (!p)
-  return nullptr;
+    if (!p)
+      return nullptr;
 
-if (!beg)
-  return nullptr;
+    if (!beg)
+      return nullptr;
 
-if (!b)
-  return nullptr;
+    if (!b)
+      return nullptr;
 
-if (!ptr)
-  return SetErrnoOnNull(DFsanAllocate(size, sizeof(u64), false /*zeroise*/));
-if (size == 0) {
-  dfsan_deallocate(ptr);
-  return nullptr;
-}
+    if (!ptr)
+      return SetErrnoOnNull(
+          DFsanAllocate(size, sizeof(u64), false /*zeroise*/));
+    if (size == 0) {
+      dfsan_deallocate(ptr);
+      return nullptr;
+    }
 
-if (AllocatorMayReturnNull())
-  return nullptr;
+    if (AllocatorMayReturnNull())
+      return nullptr;
 
-if (AllocatorMayReturnNull())
-  return nullptr;
+    if (AllocatorMayReturnNull())
+      return nullptr;
 
-if (AllocatorMayReturnNull())
-  return nullptr;
+    if (AllocatorMayReturnNull())
+      return nullptr;
 
-if (AllocatorMayReturnNull())
-  return nullptr;
+    if (AllocatorMayReturnNull())
+      return nullptr;
 
     BufferedStackTrace stack;
     ReportRssLimitExceeded(&stack);

``````````

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https://github.com/llvm/llvm-project/pull/85986