Vendor import of llvm trunk r130700:

http://llvm.org/svn/llvm-project/llvm/trunk@130700

1 files changed, 9 insertions, 2 deletions

diff --git a/lib/Support/Windows/PathV2.inc b/lib/Support/Windows/PathV2.inc
index 8effb0c..af71b73 100644
--- a/lib/Support/Windows/PathV2.inc
+++ b/lib/Support/Windows/PathV2.inc
@@ -449,7 +449,14 @@ error_code status(const Twine &path, file_status &result) {
   SmallString<128> path_storage;
   SmallVector<wchar_t, 128> path_utf16;
 
-  if (error_code ec = UTF8ToUTF16(path.toStringRef(path_storage),
+  StringRef path8 = path.toStringRef(path_storage);
+  // FIXME: We should detect as many "special file name" as possible.
+  if (path8.compare_lower("nul") == 0) {
+    result = file_status(file_type::character_file);
+    return success;
+  }
+
+  if (error_code ec = UTF8ToUTF16(path8,
                                   path_utf16))
     return ec;
 
@@ -649,7 +656,7 @@ error_code get_magic(const Twine &path, uint32_t len,
   ::CloseHandle(file);
   if (!read_success || (bytes_read != len)) {
     // Set result size to the number of bytes read if it's valid.
-    if (bytes_read >= 0 && bytes_read <= len)
+    if (bytes_read <= len)
       result.set_size(bytes_read);
     // ERROR_HANDLE_EOF is mapped to errc::value_too_large.
     return ec;