[lldb][NFC] Use UNUSED_IF_ASSERT_DISABLED instead of (void) cast

Uses of (void) remain where they are for purposes other than an
assert variable.

lldb/source/DataFormatters/StringPrinter.cpp

@@ -183,7 +183,7 @@ DecodedCharBuffer GetPrintableImpl<StringElementType::UTF8>(
       &buffer_for_conversion, buffer_end, &codepoint, llvm::strictConversion);
   assert(result == llvm::conversionOK &&
          "Failed to convert legal utf8 sequence");
-  (void)result;
+  UNUSED_IF_ASSERT_DISABLED(result);
 
   // The UTF8 helper always advances by the utf8 encoded length.
   const unsigned utf8_encoded_len = buffer_for_conversion - buffer;

lldb/source/Expression/IRInterpreter.cpp

@@ -1509,7 +1509,7 @@ bool IRInterpreter::Interpret(llvm::Module &module, llvm::Function &function,
           size_t dataSize = 0;
 
           bool Success = execution_unit.GetAllocSize(addr, dataSize);
-          (void)Success;
+          UNUSED_IF_ASSERT_DISABLED(Success);
           assert(Success &&
                  "unable to locate host data for transfer to device");
           // Create the required buffer

lldb/source/Host/common/PseudoTerminal.cpp

@@ -123,7 +123,7 @@ std::string PseudoTerminal::GetSecondaryName() const {
     char buf[PATH_MAX];
     buf[0] = '\0';
     int r = ptsname_r(m_primary_fd, buf, sizeof(buf));
-    (void)r;
+    UNUSED_IF_ASSERT_DISABLED(r);
     assert(r == 0);
     return buf;
 #if defined(__APPLE__)

lldb/source/Host/posix/ConnectionFileDescriptorPosix.cpp

@@ -510,7 +510,7 @@ ConnectionFileDescriptor::BytesAvailable(const Timeout<std::micro> &timeout,
           ssize_t bytes_read =
               llvm::sys::RetryAfterSignal(-1, ::read, pipe_fd, &c, 1);
           assert(bytes_read == 1);
-          (void)bytes_read;
+          UNUSED_IF_ASSERT_DISABLED(bytes_read);
           switch (c) {
           case 'q':
             LLDB_LOGF(log,

lldb/source/Host/posix/MainLoopPosix.cpp

@@ -122,7 +122,7 @@ sigset_t MainLoopPosix::RunImpl::get_sigmask() {
   sigset_t sigmask;
   int ret = pthread_sigmask(SIG_SETMASK, nullptr, &sigmask);
   assert(ret == 0);
-  (void)ret;
+  UNUSED_IF_ASSERT_DISABLED(ret);
 
   for (const auto &sig : loop.m_signals)
     sigdelset(&sigmask, sig.first);
@@ -299,7 +299,7 @@ MainLoopPosix::RegisterSignal(int signo, const Callback &callback,
   // Even if using kqueue, the signal handler will still be invoked, so it's
   // important to replace it with our "benign" handler.
   int ret = sigaction(signo, &new_action, &info.old_action);
-  (void)ret;
+  UNUSED_IF_ASSERT_DISABLED(ret);
   assert(ret == 0 && "sigaction failed");
 
 #if HAVE_SYS_EVENT_H
@@ -346,7 +346,7 @@ void MainLoopPosix::UnregisterSignal(
   int ret = pthread_sigmask(it->second.was_blocked ? SIG_BLOCK : SIG_UNBLOCK,
                             &set, nullptr);
   assert(ret == 0);
-  (void)ret;
+  UNUSED_IF_ASSERT_DISABLED(ret);
 
 #if HAVE_SYS_EVENT_H
   struct kevent ev;

lldb/source/Host/windows/MainLoopWindows.cpp

@@ -30,7 +30,7 @@ MainLoopWindows::~MainLoopWindows() {
   assert(m_read_fds.empty());
   BOOL result = WSACloseEvent(m_trigger_event);
   assert(result == TRUE);
-  (void)result;
+  UNUSED_IF_ASSERT_DISABLED(result);
 }
 
 llvm::Expected<size_t> MainLoopWindows::Poll() {
@@ -39,7 +39,7 @@ llvm::Expected<size_t> MainLoopWindows::Poll() {
   for (auto &[fd, info] : m_read_fds) {
     int result = WSAEventSelect(fd, info.event, FD_READ | FD_ACCEPT | FD_CLOSE);
     assert(result == 0);
-    (void)result;
+    UNUSED_IF_ASSERT_DISABLED(result);
 
     events.push_back(info.event);
   }
@@ -51,7 +51,7 @@ llvm::Expected<size_t> MainLoopWindows::Poll() {
   for (auto &fd : m_read_fds) {
     int result = WSAEventSelect(fd.first, WSA_INVALID_EVENT, 0);
     assert(result == 0);
-    (void)result;
+    UNUSED_IF_ASSERT_DISABLED(result);
   }
 
   if (result >= WSA_WAIT_EVENT_0 && result <= WSA_WAIT_EVENT_0 + events.size())
@@ -99,7 +99,7 @@ void MainLoopWindows::UnregisterReadObject(IOObject::WaitableHandle handle) {
   assert(it != m_read_fds.end());
   BOOL result = WSACloseEvent(it->second.event);
   assert(result == TRUE);
-  (void)result;
+  UNUSED_IF_ASSERT_DISABLED(result);
   m_read_fds.erase(it);
 }
 

lldb/source/Plugins/LanguageRuntime/ObjC/AppleObjCRuntime/AppleObjCRuntimeV1.cpp

@@ -161,7 +161,7 @@ AppleObjCRuntimeV1::CreateObjectChecker(std::string name,
                "           \n",
                name.c_str());
   assert(strformatsize < (int)sizeof(buf->contents));
-  (void)strformatsize;
+  UNUSED_IF_ASSERT_DISABLED(strformatsize);
 
   return GetTargetRef().CreateUtilityFunction(buf->contents, std::move(name),
                                               eLanguageTypeC, exe_ctx);

lldb/source/Plugins/ObjectFile/Breakpad/BreakpadRecords.cpp

@@ -7,6 +7,7 @@
 //===----------------------------------------------------------------------===//
 
 #include "Plugins/ObjectFile/Breakpad/BreakpadRecords.h"
+#include "lldb/lldb-defines.h"
 #include "llvm/ADT/StringExtras.h"
 #include "llvm/ADT/StringSwitch.h"
 #include "llvm/Support/Endian.h"
@@ -119,7 +120,7 @@ static UUID parseModuleId(llvm::Triple::OSType os, llvm::StringRef str) {
   uint32_t age;
   bool success = to_integer(age_str, age, 16);
   assert(success);
-  (void)success;
+  UNUSED_IF_ASSERT_DISABLED(success);
   data.age = age;
 
   // On non-windows, the age field should always be zero, so we don't include to

lldb/source/Plugins/Process/FreeBSD/NativeProcessFreeBSD.cpp

@@ -69,7 +69,7 @@ NativeProcessFreeBSD::Manager::Launch(ProcessLaunchInfo &launch_info,
   int wstatus;
   ::pid_t wpid = llvm::sys::RetryAfterSignal(-1, ::waitpid, pid, &wstatus, 0);
   assert(wpid == pid);
-  (void)wpid;
+  UNUSED_IF_ASSERT_DISABLED(wpid);
   if (!WIFSTOPPED(wstatus)) {
     LLDB_LOG(log, "Could not sync with inferior process: wstatus={1}",
              WaitStatus::Decode(wstatus));

lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp

@@ -281,7 +281,7 @@ NativeProcessLinux::Manager::Launch(ProcessLaunchInfo &launch_info,
   int wstatus = 0;
   ::pid_t wpid = llvm::sys::RetryAfterSignal(-1, ::waitpid, pid, &wstatus, 0);
   assert(wpid == pid);
-  (void)wpid;
+  UNUSED_IF_ASSERT_DISABLED(wpid);
   if (!WIFSTOPPED(wstatus)) {
     LLDB_LOG(log, "Could not sync with inferior process: wstatus={1}",
              WaitStatus::Decode(wstatus));

lldb/source/Plugins/SymbolFile/DWARF/DWARFASTParserClang.cpp

@@ -1762,7 +1762,7 @@ DWARFASTParserClang::ParseStructureLikeDIE(const SymbolContext &sc,
     }
   }
   assert(tag_decl_kind != -1);
-  (void)tag_decl_kind;
+  UNUSED_IF_ASSERT_DISABLED(tag_decl_kind);
   bool clang_type_was_created = false;
   clang_type = CompilerType(
       m_ast.weak_from_this(),

lldb/source/Symbol/SymbolFile.cpp

@@ -216,7 +216,7 @@ void SymbolFileCommon::SetCompileUnitAtIndex(uint32_t idx,
   std::lock_guard<std::recursive_mutex> guard(GetModuleMutex());
   const size_t num_compile_units = GetNumCompileUnits();
   assert(idx < num_compile_units);
-  (void)num_compile_units;
+  UNUSED_IF_ASSERT_DISABLED(num_compile_units);
 
   // Fire off an assertion if this compile unit already exists for now. The
   // partial parsing should take care of only setting the compile unit

lldb/source/Utility/Log.cpp

@@ -210,7 +210,7 @@ void Log::Warning(const char *format, ...) {
 void Log::Register(llvm::StringRef name, Channel &channel) {
   auto iter = g_channel_map->try_emplace(name, channel);
   assert(iter.second == true);
-  (void)iter;
+  UNUSED_IF_ASSERT_DISABLED(iter);
 }
 
 void Log::Unregister(llvm::StringRef name) {

lldb/tools/lldb-dap/DAP.cpp

@@ -57,7 +57,7 @@ DAP::DAP()
   int result = _setmode(fileno(stdout), _O_BINARY);
   assert(result);
   result = _setmode(fileno(stdin), _O_BINARY);
-  (void)result;
+  UNUSED_IF_ASSERT_DISABLED(result);
   assert(result);
 #endif
   if (log_file_path)