[libc][NFC] Remove the now unused WrapperGen tool and tests.

4 files changed, 0 insertions, 208 deletions

diff --git a/libc/utils/CMakeLists.txt b/libc/utils/CMakeLists.txt
index 1c312c3a1b80..da8abd77783c 100644
--- a/libc/utils/CMakeLists.txt
+++ b/libc/utils/CMakeLists.txt
@@ -5,5 +5,4 @@ add_subdirectory(UnitTest)
 if(LLVM_LIBC_FULL_BUILD AND NOT
   (LIBC_TARGET_ARCHITECTURE_IS_GPU OR LIBC_TARGET_OS_IS_BAREMETAL))
   add_subdirectory(IntegrationTest)
-  add_subdirectory(tools)
 endif()
diff --git a/libc/utils/tools/CMakeLists.txt b/libc/utils/tools/CMakeLists.txt
deleted file mode 100644
index e975b7f293af..000000000000
--- a/libc/utils/tools/CMakeLists.txt
+++ /dev/null
@@ -1 +0,0 @@
-add_subdirectory(WrapperGen)
diff --git a/libc/utils/tools/WrapperGen/CMakeLists.txt b/libc/utils/tools/WrapperGen/CMakeLists.txt
deleted file mode 100644
index 5fd78591e9b3..000000000000
--- a/libc/utils/tools/WrapperGen/CMakeLists.txt
+++ /dev/null
@@ -1,8 +0,0 @@
-set(LLVM_LINK_COMPONENTS Support)
-
-add_tablegen(libc-wrappergen LLVM_LIBC
-  Main.cpp
-)
-
-target_include_directories(libc-wrappergen PRIVATE ${LIBC_SOURCE_DIR})
-target_link_libraries(libc-wrappergen PRIVATE LibcTableGenUtil)
diff --git a/libc/utils/tools/WrapperGen/Main.cpp b/libc/utils/tools/WrapperGen/Main.cpp
deleted file mode 100644
index 5711827b457c..000000000000
--- a/libc/utils/tools/WrapperGen/Main.cpp
+++ /dev/null
@@ -1,198 +0,0 @@
-//===-- "main" function of libc-wrappergen --------------------------------===//
-//
-// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-// See https://llvm.org/LICENSE.txt for license information.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-//
-//===----------------------------------------------------------------------===//
-
-#include "utils/LibcTableGenUtil/APIIndexer.h"
-
-#include "llvm/ADT/StringRef.h"
-#include "llvm/Support/CommandLine.h"
-#include "llvm/Support/Error.h"
-#include "llvm/Support/JSON.h"
-#include "llvm/Support/MemoryBuffer.h"
-#include "llvm/TableGen/Error.h"
-#include "llvm/TableGen/Main.h"
-
-#include <fstream>
-#include <map>
-#include <sstream>
-#include <string>
-
-llvm::cl::opt<bool>
-    GenWrapper("gen-wrapper",
-               llvm::cl::desc("Generate a C wrapper for <name>."));
-llvm::cl::opt<bool> GenAlias("gen-alias",
-                             llvm::cl::desc("Generate a C alias for <name>."));
-
-llvm::cl::opt<std::string>
-    FunctionName("name", llvm::cl::desc("Name of the function to be wrapped."),
-                 llvm::cl::value_desc("<function name>"), llvm::cl::Required);
-llvm::cl::opt<std::string> MangledNameString(
-    "mangled-name", llvm::cl::desc("Declare as an alias to this mangled name."),
-    llvm::cl::value_desc("<aliasee string>"));
-llvm::cl::opt<std::string> MangledNameFile(
-    "mangled-name-file",
-    llvm::cl::desc("Declare as an alias to the C name read from "
-                   "this file."),
-    llvm::cl::value_desc("<path to a file containing alias name>"));
-llvm::cl::opt<std::string>
-    AppendToFile("append-to-file",
-                 llvm::cl::desc("Append the generated content at the end of "
-                                "the contents of this file."),
-                 llvm::cl::value_desc("<path to a file>"));
-
-void validateOpts() {
-  int ActionCount = 0;
-  if (GenWrapper)
-    ++ActionCount;
-  if (GenAlias)
-    ++ActionCount;
-  if (ActionCount != 1) {
-    llvm::PrintFatalError("Exactly one of {--gen-wrapper, --gen-alias} "
-                          "should be specified");
-  }
-  if (!MangledNameString.empty() && !MangledNameFile.empty()) {
-    llvm::PrintFatalError("The options 'mangled-name' and 'mangled-name-file' "
-                          "cannot be specified simultaneously.");
-  }
-}
-
-static std::string getMangledName() {
-  if (!MangledNameString.empty())
-    return MangledNameString;
-
-  if (MangledNameFile.empty())
-    llvm::PrintFatalError("At least one of --mangled-name or "
-                          "--mangled-name-file should be specified.");
-
-  auto ErrorOrBuf = llvm::MemoryBuffer::getFile(MangledNameFile);
-  if (!ErrorOrBuf)
-    llvm::PrintFatalError("Unable to read the mangled name file " +
-                          MangledNameFile);
-  llvm::StringRef FileContent = ErrorOrBuf.get()->getBuffer().trim();
-  llvm::SmallVector<llvm::StringRef> Lines;
-  FileContent.split(Lines, '\n');
-  for (llvm::StringRef L : Lines) {
-    if (L.contains("__llvm_libc"))
-      return std::string(L);
-  }
-  llvm::PrintFatalError("Did not find an LLVM libc mangled name in " +
-                        MangledNameFile);
-  return std::string();
-}
-
-void writeAppendToFile(llvm::raw_ostream &OS) {
-  auto ErrorOrBuf = llvm::MemoryBuffer::getFile(AppendToFile);
-  if (!ErrorOrBuf) {
-    llvm::PrintFatalError("Unable to read the file '" + AppendToFile +
-                          "' to append to.");
-  }
-  OS << ErrorOrBuf.get()->getBuffer().trim() << '\n';
-}
-
-llvm::Record *getFunctionSpec(const llvm_libc::APIIndexer &Indexer) {
-  auto Iter = Indexer.FunctionSpecMap.find(FunctionName);
-  if (Iter == Indexer.FunctionSpecMap.end()) {
-    llvm::PrintFatalError("Function '" + FunctionName +
-                          "' not found in any standard spec.");
-  }
-  auto &NameSpecPair = *Iter;
-  return NameSpecPair.second;
-}
-
-std::pair<std::string, bool> writeFunctionHeader(llvm_libc::APIIndexer &Indexer,
-                                                 llvm::Record *FunctionSpec,
-                                                 llvm::raw_ostream &OS) {
-  llvm::Record *RetValSpec = FunctionSpec->getValueAsDef("Return");
-  llvm::Record *ReturnType = RetValSpec->getValueAsDef("ReturnType");
-  std::string ReturnTypeString = Indexer.getTypeAsString(ReturnType);
-  bool ShouldReturn = true;
-  // We are generating C wrappers in C++ code. So, we should convert the C
-  // _Noreturn to the C++ [[noreturn]].
-  llvm::StringRef NR("_Noreturn "); // Note the space after _Noreturn
-  llvm::StringRef RT(ReturnTypeString);
-  if (RT.startswith(NR)) {
-    RT = RT.drop_front(NR.size() - 1); // - 1 because of the space.
-    ReturnTypeString = std::string("[[noreturn]]") + std::string(RT);
-    ShouldReturn = false;
-  }
-  OS << "extern \"C\" " << ReturnTypeString << " " << FunctionName << "(";
-
-  auto ArgsList = FunctionSpec->getValueAsListOfDefs("Args");
-  std::stringstream CallArgs;
-  std::string ArgPrefix("__arg");
-  for (size_t i = 0; i < ArgsList.size(); ++i) {
-    llvm::Record *ArgType = ArgsList[i]->getValueAsDef("ArgType");
-    auto TypeName = Indexer.getTypeAsString(ArgType);
-
-    if (TypeName.compare("void") == 0) {
-      if (ArgsList.size() == 1) {
-        break;
-      } else {
-        // the reason this is a fatal error is that a void argument means this
-        // function has no arguments; multiple copies of no arguments is an
-        // error.
-        llvm::PrintFatalError(
-            "The specification for function " + FunctionName +
-            " lists other arguments along with a void argument.");
-      }
-    }
-
-    OS << TypeName << " " << ArgPrefix << i;
-    CallArgs << ArgPrefix << i;
-    if (i < ArgsList.size() - 1) {
-      OS << ", ";
-      CallArgs << ", ";
-    }
-  }
-  return make_pair(CallArgs.str(), ShouldReturn);
-}
-
-static bool generateWrapper(llvm::raw_ostream &OS,
-                            llvm::RecordKeeper &Records) {
-  llvm_libc::APIIndexer Indexer(Records);
-  llvm::Record *FunctionSpec = getFunctionSpec(Indexer);
-  if (AppendToFile.empty()) {
-    std::string Header = Indexer.FunctionToHeaderMap[FunctionName];
-    auto RelPath =
-        llvm::StringRef(Header).drop_back(2); // Drop the ".h" suffix.
-    OS << "#include \"src/" << RelPath << "/" << FunctionName << ".h\"\n";
-  } else {
-    writeAppendToFile(OS);
-  }
-  auto Pair = writeFunctionHeader(Indexer, FunctionSpec, OS);
-  OS << ") {\n"
-     << "  " << (Pair.second ? "return " : "")
-     << "__llvm_libc::" << FunctionName << "(" << Pair.first << ");\n"
-     << "}\n";
-  return false;
-}
-
-static bool generateAlias(llvm::raw_ostream &OS, llvm::RecordKeeper &Records) {
-  if (!AppendToFile.empty())
-    writeAppendToFile(OS);
-  llvm_libc::APIIndexer Indexer(Records);
-  llvm::Record *FunctionSpec = getFunctionSpec(Indexer);
-  auto Pair = writeFunctionHeader(Indexer, FunctionSpec, OS);
-  OS << ") __attribute__((alias(\"" << getMangledName() << "\")));\n";
-  return false;
-}
-
-static bool wrapperGenMain(llvm::raw_ostream &OS, llvm::RecordKeeper &Records) {
-  validateOpts();
-
-  if (GenWrapper)
-    return generateWrapper(OS, Records);
-  if (GenAlias)
-    return generateAlias(OS, Records);
-
-  __builtin_unreachable();
-}
-
-int main(int argc, char *argv[]) {
-  llvm::cl::ParseCommandLineOptions(argc, argv);
-  return TableGenMain(argv[0], wrapperGenMain);
-}