allwpilib/upstream_utils/llvm_patches/0020-Remove-unused-functions.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: PJ Reiniger <pj.reiniger@gmail.com>
Date: Sun, 8 May 2022 19:16:51 -0400
Subject: [PATCH 20/35] Remove unused functions

---
 llvm/include/llvm/Support/VersionTuple.h |  1 -
 llvm/include/llvm/Support/raw_ostream.h  |  5 +-
 llvm/lib/Support/ErrorHandling.cpp       | 16 -----
 llvm/lib/Support/raw_ostream.cpp         | 47 ++++++--------
 llvm/unittests/ADT/SmallStringTest.cpp   | 81 ------------------------
 5 files changed, 23 insertions(+), 127 deletions(-)

diff --git a/llvm/include/llvm/Support/VersionTuple.h b/llvm/include/llvm/Support/VersionTuple.h
index 9102ff063afedc03bd524b2805cba98ea5afeba8..7638d1ab0d12e22608d4c3e3a14ec8e0ce15d2d5 100644
--- a/llvm/include/llvm/Support/VersionTuple.h
+++ b/llvm/include/llvm/Support/VersionTuple.h
@@ -21,7 +21,6 @@
 #include <tuple>
 
 namespace llvm {
-template <typename HasherT, llvm::endianness Endianness> class HashBuilder;
 class raw_ostream;
 
 /// Represents a version number in the form major[.minor[.subminor[.build]]].
diff --git a/llvm/include/llvm/Support/raw_ostream.h b/llvm/include/llvm/Support/raw_ostream.h
index 990d3e4cfe53e025df6ce797f46f9de5af8ca6dc..264b8192a0473b94363765995517851cbf30d045 100644
--- a/llvm/include/llvm/Support/raw_ostream.h
+++ b/llvm/include/llvm/Support/raw_ostream.h
@@ -71,7 +71,6 @@ private:
   /// for a \see write_impl() call to handle the data which has been put into
   /// this buffer.
   char *OutBufStart, *OutBufEnd, *OutBufCur;
-  bool ColorEnabled = false;
 
   enum class BufferKind {
     Unbuffered = 0,
@@ -330,9 +329,9 @@ public:
 
   // Enable or disable colors. Once enable_colors(false) is called,
   // changeColor() has no effect until enable_colors(true) is called.
-  virtual void enable_colors(bool enable) { ColorEnabled = enable; }
+  virtual void enable_colors(bool /*enable*/) {}
 
-  bool colors_enabled() const { return ColorEnabled; }
+  bool colors_enabled() const { return false; }
 
   //===--------------------------------------------------------------------===//
   // Subclass Interface
diff --git a/llvm/lib/Support/ErrorHandling.cpp b/llvm/lib/Support/ErrorHandling.cpp
index c153b91391fe63e819e4907ac98d2ee26228107a..c9bb71be96f0ea3ad26c61cfa8ab35dfa6f60d02 100644
--- a/llvm/lib/Support/ErrorHandling.cpp
+++ b/llvm/lib/Support/ErrorHandling.cpp
@@ -182,22 +182,6 @@ void llvm::llvm_unreachable_internal(const char *msg, const char *file,
 #endif
 }
 
-static void bindingsErrorHandler(void *user_data, const char *reason,
-                                 bool gen_crash_diag) {
-  LLVMFatalErrorHandler handler =
-      LLVM_EXTENSION reinterpret_cast<LLVMFatalErrorHandler>(user_data);
-  handler(reason);
-}
-
-void LLVMInstallFatalErrorHandler(LLVMFatalErrorHandler Handler) {
-  install_fatal_error_handler(bindingsErrorHandler,
-                              LLVM_EXTENSION reinterpret_cast<void *>(Handler));
-}
-
-void LLVMResetFatalErrorHandler() {
-  remove_fatal_error_handler();
-}
-
 #ifdef _WIN32
 
 #define WIN32_NO_STATUS
diff --git a/llvm/lib/Support/raw_ostream.cpp b/llvm/lib/Support/raw_ostream.cpp
index a1b40ae78da9fed4bb9d489f298c7adc9cf437b9..3333890ed1b086c94cdfce8bc9efb3d191a47f89 100644
--- a/llvm/lib/Support/raw_ostream.cpp
+++ b/llvm/lib/Support/raw_ostream.cpp
@@ -168,16 +168,6 @@ raw_ostream &raw_ostream::write_escaped(std::string_view Str,
   return *this;
 }
 
-raw_ostream &raw_ostream::operator<<(const void *P) {
-  llvm::write_hex(*this, (uintptr_t)P, HexPrintStyle::PrefixLower);
-  return *this;
-}
-
-raw_ostream &raw_ostream::operator<<(double N) {
-  llvm::write_double(*this, N, FloatStyle::Exponent);
-  return *this;
-}
-
 void raw_ostream::flush_nonempty() {
   assert(OutBufCur > OutBufStart && "Invalid call to flush_nonempty.");
   size_t Length = OutBufCur - OutBufStart;
@@ -314,15 +304,22 @@ static int getFD(std::string_view Filename, std::error_code &EC,
   if (Filename == "-") {
     EC = std::error_code();
     // Change stdout's text/binary mode based on the Flags.
-    sys::ChangeStdoutMode(Flags);
+    if (!(Flags & fs::OF_Text)) {
+#if defined(_WIN32)
+      _setmode(_fileno(stdout), _O_BINARY);
+#endif
+    }
     return STDOUT_FILENO;
   }
 
-  int FD;
-  if (Access & sys::fs::FA_Read)
-    EC = sys::fs::openFileForReadWrite(Filename, FD, Disp, Flags);
+  fs::file_t F;
+  if (Access & fs::FA_Read)
+    F = fs::OpenFileForReadWrite(fs::path{std::string_view{Filename.data(), Filename.size()}}, EC, Disp, Flags);
   else
-    EC = sys::fs::openFileForWrite(Filename, FD, Disp, Flags);
+    F = fs::OpenFileForWrite(fs::path{std::string_view{Filename.data(), Filename.size()}}, EC, Disp, Flags);
+  if (EC)
+    return -1;
+  int FD = fs::FileToFd(F, EC, Flags);
   if (EC)
     return -1;
 
@@ -382,12 +379,8 @@ raw_fd_ostream::raw_fd_ostream(int fd, bool shouldClose, bool unbuffered,
 
   // Get the starting position.
   off_t loc = ::lseek(FD, 0, SEEK_CUR);
-  sys::fs::file_status Status;
-  std::error_code EC = status(FD, Status);
-  IsRegularFile = Status.type() == sys::fs::file_type::regular_file;
 #ifdef _WIN32
-  // MSVCRT's _lseek(SEEK_CUR) doesn't return -1 for pipes.
-  SupportsSeeking = !EC && IsRegularFile;
+  SupportsSeeking = loc != (off_t)-1 && ::GetFileType(reinterpret_cast<HANDLE>(::_get_osfhandle(FD))) != FILE_TYPE_PIPE;
 #else
   SupportsSeeking = !EC && loc != (off_t)-1;
 #endif
@@ -400,10 +393,8 @@ raw_fd_ostream::raw_fd_ostream(int fd, bool shouldClose, bool unbuffered,
 raw_fd_ostream::~raw_fd_ostream() {
   if (FD >= 0) {
     flush();
-    if (ShouldClose) {
-      if (auto EC = sys::Process::SafelyCloseFileDescriptor(FD))
-        error_detected(EC);
-    }
+    if (ShouldClose && ::close(FD) < 0)
+      error_detected(std::error_code(errno, std::generic_category()));
   }
 
 #ifdef __MINGW32__
@@ -501,7 +492,11 @@ void raw_fd_ostream::write_impl(const char *Ptr, size_t Size) {
 
   do {
     size_t ChunkSize = std::min(Size, MaxWriteSize);
+#ifdef _WIN32
+    int ret = ::_write(FD, Ptr, ChunkSize);
+#else
     ssize_t ret = ::write(FD, Ptr, ChunkSize);
+#endif
 
     if (ret < 0) {
       // If it's a recoverable error, swallow it and retry the write.
@@ -544,8 +539,8 @@ void raw_fd_ostream::close() {
   assert(ShouldClose);
   ShouldClose = false;
   flush();
-  if (auto EC = sys::Process::SafelyCloseFileDescriptor(FD))
-    error_detected(EC);
+  if (::close(FD) < 0)
+    error_detected(std::error_code(errno, std::generic_category()));
   FD = -1;
 }
 
diff --git a/llvm/unittests/ADT/SmallStringTest.cpp b/llvm/unittests/ADT/SmallStringTest.cpp
index 6cf14700b34739420cd3dc4ff8a4c16ce162f715..87600ea4704bc98acab9085d16cfafd3d586714e 100644
--- a/llvm/unittests/ADT/SmallStringTest.cpp
+++ b/llvm/unittests/ADT/SmallStringTest.cpp
@@ -129,23 +129,6 @@ TEST_F(SmallStringTest, StdStringConversion) {
   EXPECT_EQ("abc", theStdString);
 }
 
-TEST_F(SmallStringTest, Substr) {
-  theString = "hello";
-  EXPECT_EQ("lo", theString.substr(3));
-  EXPECT_EQ("", theString.substr(100));
-  EXPECT_EQ("hello", theString.substr(0, 100));
-  EXPECT_EQ("o", theString.substr(4, 10));
-}
-
-TEST_F(SmallStringTest, Slice) {
-  theString = "hello";
-  EXPECT_EQ("l", theString.slice(2, 3));
-  EXPECT_EQ("ell", theString.slice(1, 4));
-  EXPECT_EQ("llo", theString.slice(2, 100));
-  EXPECT_EQ("", theString.slice(2, 1));
-  EXPECT_EQ("", theString.slice(10, 20));
-}
-
 TEST_F(SmallStringTest, Find) {
   theString = "hello";
   EXPECT_EQ(2U, theString.find('l'));
@@ -180,68 +163,4 @@ TEST_F(SmallStringTest, Find) {
   EXPECT_EQ(0U, theString.find(""));
 }
 
-TEST_F(SmallStringTest, Count) {
-  theString = "hello";
-  EXPECT_EQ(2U, theString.count('l'));
-  EXPECT_EQ(1U, theString.count('o'));
-  EXPECT_EQ(0U, theString.count('z'));
-  EXPECT_EQ(0U, theString.count("helloworld"));
-  EXPECT_EQ(1U, theString.count("hello"));
-  EXPECT_EQ(1U, theString.count("ello"));
-  EXPECT_EQ(0U, theString.count("zz"));
-}
-
-TEST_F(SmallStringTest, Realloc) {
-  theString = "abcd";
-  theString.reserve(100);
-  EXPECT_EQ("abcd", theString);
-  unsigned const N = 100000;
-  theString.reserve(N);
-  for (unsigned i = 0; i < N - 4; ++i)
-    theString.push_back('y');
-  EXPECT_EQ("abcdyyy", theString.slice(0, 7));
-}
-
-TEST_F(SmallStringTest, Comparisons) {
-  EXPECT_GT( 0, SmallString<10>("aab").compare("aad"));
-  EXPECT_EQ( 0, SmallString<10>("aab").compare("aab"));
-  EXPECT_LT( 0, SmallString<10>("aab").compare("aaa"));
-  EXPECT_GT( 0, SmallString<10>("aab").compare("aabb"));
-  EXPECT_LT( 0, SmallString<10>("aab").compare("aa"));
-  EXPECT_LT( 0, SmallString<10>("\xFF").compare("\1"));
-
-  EXPECT_EQ(-1, SmallString<10>("AaB").compare_insensitive("aAd"));
-  EXPECT_EQ( 0, SmallString<10>("AaB").compare_insensitive("aab"));
-  EXPECT_EQ( 1, SmallString<10>("AaB").compare_insensitive("AAA"));
-  EXPECT_EQ(-1, SmallString<10>("AaB").compare_insensitive("aaBb"));
-  EXPECT_EQ( 1, SmallString<10>("AaB").compare_insensitive("aA"));
-  EXPECT_EQ( 1, SmallString<10>("\xFF").compare_insensitive("\1"));
-
-  EXPECT_EQ(-1, SmallString<10>("aab").compare_numeric("aad"));
-  EXPECT_EQ( 0, SmallString<10>("aab").compare_numeric("aab"));
-  EXPECT_EQ( 1, SmallString<10>("aab").compare_numeric("aaa"));
-  EXPECT_EQ(-1, SmallString<10>("aab").compare_numeric("aabb"));
-  EXPECT_EQ( 1, SmallString<10>("aab").compare_numeric("aa"));
-  EXPECT_EQ(-1, SmallString<10>("1").compare_numeric("10"));
-  EXPECT_EQ( 0, SmallString<10>("10").compare_numeric("10"));
-  EXPECT_EQ( 0, SmallString<10>("10a").compare_numeric("10a"));
-  EXPECT_EQ( 1, SmallString<10>("2").compare_numeric("1"));
-  EXPECT_EQ( 0, SmallString<10>("llvm_v1i64_ty").compare_numeric("llvm_v1i64_ty"));
-  EXPECT_EQ( 1, SmallString<10>("\xFF").compare_numeric("\1"));
-  EXPECT_EQ( 1, SmallString<10>("V16").compare_numeric("V1_q0"));
-  EXPECT_EQ(-1, SmallString<10>("V1_q0").compare_numeric("V16"));
-  EXPECT_EQ(-1, SmallString<10>("V8_q0").compare_numeric("V16"));
-  EXPECT_EQ( 1, SmallString<10>("V16").compare_numeric("V8_q0"));
-  EXPECT_EQ(-1, SmallString<10>("V1_q0").compare_numeric("V8_q0"));
-  EXPECT_EQ( 1, SmallString<10>("V8_q0").compare_numeric("V1_q0"));
-}
-
-// Check gtest prints SmallString as a string instead of a container of chars.
-// The code is in utils/unittest/googletest/internal/custom/gtest-printers.h
-TEST_F(SmallStringTest, GTestPrinter) {
-  EXPECT_EQ(R"("foo")", ::testing::PrintToString(SmallString<1>("foo")));
-  const SmallVectorImpl<char> &ErasedSmallString = SmallString<1>("foo");
-  EXPECT_EQ(R"("foo")", ::testing::PrintToString(ErasedSmallString));
-}
-
 } // namespace