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llvm-project/clang/lib/Driver/MSVCToolChain.cpp
David L. Jones 24fb20c13d Refactor how the MSVC toolchain searches for a compatibility version. 
Summary:
The MSVC toolchain and Clang driver combination currently uses a fairly complex
sequence of steps to determine the MS compatibility version to pass to cc1.
There is some oddness in this sequence currently, with some code which inspects
flags in the toolchain, and some code which inspects the triple and local
environment in the driver code.

This change is an attempt to consolidate most of this logic so that
Win32-specific code lives in MSVCToolChain.cpp. I'm not 100% happy with the
split, so any suggestions are welcome.

There are a few things you might want to watch for for specifically:

 - On all platforms, if MSVC compatibility flags are provided (and valid), use
   those.
 - The fallback sequence should be the same as before, but is now consolidated
   into MSVCToolChain::getMSVCVersion:
   - Otherwise, try to use the Triple.
   - Otherwise, on Windows, check the executable.
   - Otherwise, on Windows or with --fms-extensions, default to 18.
   - Otherwise, we can't determine the version.
 - MSVCToolChain::ComputeEffectiveTriple no longer calls the base
   ToolChain::ComputeEffectiveClangTriple. The only thing it would change for
   Windows the architecture, which we don't care about for the compatibility
   version.
    - I'm not sure whether this is philosophically correct (but it should
      be easy to add back to MSVCToolChain::getMSVCVersionFromTriple if not).
    - Previously, Tools.cpp just called getTriple() anyhow, so it doesn't look
      like the effective triple was always being used previously anyhow.

Reviewers: hans, compnerd, llvm-commits, rnk

Subscribers: amccarth

Differential Revision: https://reviews.llvm.org/D27477

llvm-svn: 288998
2016-12-07 23:41:58 +00:00

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//===--- ToolChains.cpp - ToolChain Implementations -----------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "ToolChains.h"
#include "Tools.h"
#include "clang/Basic/CharInfo.h"
#include "clang/Basic/Version.h"
#include "clang/Driver/Compilation.h"
#include "clang/Driver/Driver.h"
#include "clang/Driver/DriverDiagnostic.h"
#include "clang/Driver/Options.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/ADT/StringSwitch.h"
#include "llvm/Config/llvm-config.h"
#include "llvm/Option/Arg.h"
#include "llvm/Option/ArgList.h"
#include "llvm/Support/ConvertUTF.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/FileSystem.h"
#include "llvm/Support/Path.h"
#include "llvm/Support/Process.h"
#include <cstdio>
// Include the necessary headers to interface with the Windows registry and
// environment.
#if defined(LLVM_ON_WIN32)
#define USE_WIN32
#endif
#ifdef USE_WIN32
#define WIN32_LEAN_AND_MEAN
#define NOGDI
#ifndef NOMINMAX
#define NOMINMAX
#endif
#include <windows.h>
#endif
using namespace clang::driver;
using namespace clang::driver::toolchains;
using namespace clang;
using namespace llvm::opt;
MSVCToolChain::MSVCToolChain(const Driver &D, const llvm::Triple& Triple,
const ArgList &Args)
: ToolChain(D, Triple, Args) {
getProgramPaths().push_back(getDriver().getInstalledDir());
if (getDriver().getInstalledDir() != getDriver().Dir)
getProgramPaths().push_back(getDriver().Dir);
}
Tool *MSVCToolChain::buildLinker() const {
return new tools::visualstudio::Linker(*this);
}
Tool *MSVCToolChain::buildAssembler() const {
if (getTriple().isOSBinFormatMachO())
return new tools::darwin::Assembler(*this);
getDriver().Diag(clang::diag::err_no_external_assembler);
return nullptr;
}
bool MSVCToolChain::IsIntegratedAssemblerDefault() const {
return true;
}
bool MSVCToolChain::IsUnwindTablesDefault() const {
// Emit unwind tables by default on Win64. All non-x86_32 Windows platforms
// such as ARM and PPC actually require unwind tables, but LLVM doesn't know
// how to generate them yet.
// Don't emit unwind tables by default for MachO targets.
if (getTriple().isOSBinFormatMachO())
return false;
return getArch() == llvm::Triple::x86_64;
}
bool MSVCToolChain::isPICDefault() const {
return getArch() == llvm::Triple::x86_64;
}
bool MSVCToolChain::isPIEDefault() const {
return false;
}
bool MSVCToolChain::isPICDefaultForced() const {
return getArch() == llvm::Triple::x86_64;
}
#ifdef USE_WIN32
static bool readFullStringValue(HKEY hkey, const char *valueName,
std::string &value) {
std::wstring WideValueName;
if (!llvm::ConvertUTF8toWide(valueName, WideValueName))
return false;
DWORD result = 0;
DWORD valueSize = 0;
DWORD type = 0;
// First just query for the required size.
result = RegQueryValueExW(hkey, WideValueName.c_str(), NULL, &type, NULL,
&valueSize);
if (result != ERROR_SUCCESS || type != REG_SZ || !valueSize)
return false;
std::vector<BYTE> buffer(valueSize);
result = RegQueryValueExW(hkey, WideValueName.c_str(), NULL, NULL, &buffer[0],
&valueSize);
if (result == ERROR_SUCCESS) {
std::wstring WideValue(reinterpret_cast<const wchar_t *>(buffer.data()),
valueSize / sizeof(wchar_t));
if (valueSize && WideValue.back() == L'\0') {
WideValue.pop_back();
}
// The destination buffer must be empty as an invariant of the conversion
// function; but this function is sometimes called in a loop that passes in
// the same buffer, however. Simply clear it out so we can overwrite it.
value.clear();
return llvm::convertWideToUTF8(WideValue, value);
}
return false;
}
#endif
/// \brief Read registry string.
/// This also supports a means to look for high-versioned keys by use
/// of a $VERSION placeholder in the key path.
/// $VERSION in the key path is a placeholder for the version number,
/// causing the highest value path to be searched for and used.
/// I.e. "SOFTWARE\\Microsoft\\VisualStudio\\$VERSION".
/// There can be additional characters in the component. Only the numeric
/// characters are compared. This function only searches HKLM.
static bool getSystemRegistryString(const char *keyPath, const char *valueName,
std::string &value, std::string *phValue) {
#ifndef USE_WIN32
return false;
#else
HKEY hRootKey = HKEY_LOCAL_MACHINE;
HKEY hKey = NULL;
long lResult;
bool returnValue = false;
const char *placeHolder = strstr(keyPath, "$VERSION");
std::string bestName;
// If we have a $VERSION placeholder, do the highest-version search.
if (placeHolder) {
const char *keyEnd = placeHolder - 1;
const char *nextKey = placeHolder;
// Find end of previous key.
while ((keyEnd > keyPath) && (*keyEnd != '\\'))
keyEnd--;
// Find end of key containing $VERSION.
while (*nextKey && (*nextKey != '\\'))
nextKey++;
size_t partialKeyLength = keyEnd - keyPath;
char partialKey[256];
if (partialKeyLength >= sizeof(partialKey))
partialKeyLength = sizeof(partialKey) - 1;
strncpy(partialKey, keyPath, partialKeyLength);
partialKey[partialKeyLength] = '\0';
HKEY hTopKey = NULL;
lResult = RegOpenKeyExA(hRootKey, partialKey, 0, KEY_READ | KEY_WOW64_32KEY,
&hTopKey);
if (lResult == ERROR_SUCCESS) {
char keyName[256];
double bestValue = 0.0;
DWORD index, size = sizeof(keyName) - 1;
for (index = 0; RegEnumKeyExA(hTopKey, index, keyName, &size, NULL, NULL,
NULL, NULL) == ERROR_SUCCESS;
index++) {
const char *sp = keyName;
while (*sp && !isDigit(*sp))
sp++;
if (!*sp)
continue;
const char *ep = sp + 1;
while (*ep && (isDigit(*ep) || (*ep == '.')))
ep++;
char numBuf[32];
strncpy(numBuf, sp, sizeof(numBuf) - 1);
numBuf[sizeof(numBuf) - 1] = '\0';
double dvalue = strtod(numBuf, NULL);
if (dvalue > bestValue) {
// Test that InstallDir is indeed there before keeping this index.
// Open the chosen key path remainder.
bestName = keyName;
// Append rest of key.
bestName.append(nextKey);
lResult = RegOpenKeyExA(hTopKey, bestName.c_str(), 0,
KEY_READ | KEY_WOW64_32KEY, &hKey);
if (lResult == ERROR_SUCCESS) {
if (readFullStringValue(hKey, valueName, value)) {
bestValue = dvalue;
if (phValue)
*phValue = bestName;
returnValue = true;
}
RegCloseKey(hKey);
}
}
size = sizeof(keyName) - 1;
}
RegCloseKey(hTopKey);
}
} else {
lResult =
RegOpenKeyExA(hRootKey, keyPath, 0, KEY_READ | KEY_WOW64_32KEY, &hKey);
if (lResult == ERROR_SUCCESS) {
if (readFullStringValue(hKey, valueName, value))
returnValue = true;
if (phValue)
phValue->clear();
RegCloseKey(hKey);
}
}
return returnValue;
#endif // USE_WIN32
}
// Convert LLVM's ArchType
// to the corresponding name of Windows SDK libraries subfolder
static StringRef getWindowsSDKArch(llvm::Triple::ArchType Arch) {
switch (Arch) {
case llvm::Triple::x86:
return "x86";
case llvm::Triple::x86_64:
return "x64";
case llvm::Triple::arm:
return "arm";
default:
return "";
}
}
// Find the most recent version of Universal CRT or Windows 10 SDK.
// vcvarsqueryregistry.bat from Visual Studio 2015 sorts entries in the include
// directory by name and uses the last one of the list.
// So we compare entry names lexicographically to find the greatest one.
static bool getWindows10SDKVersion(const std::string &SDKPath,
std::string &SDKVersion) {
SDKVersion.clear();
std::error_code EC;
llvm::SmallString<128> IncludePath(SDKPath);
llvm::sys::path::append(IncludePath, "Include");
for (llvm::sys::fs::directory_iterator DirIt(IncludePath, EC), DirEnd;
DirIt != DirEnd && !EC; DirIt.increment(EC)) {
if (!llvm::sys::fs::is_directory(DirIt->path()))
continue;
StringRef CandidateName = llvm::sys::path::filename(DirIt->path());
// If WDK is installed, there could be subfolders like "wdf" in the
// "Include" directory.
// Allow only directories which names start with "10.".
if (!CandidateName.startswith("10."))
continue;
if (CandidateName > SDKVersion)
SDKVersion = CandidateName;
}
return !SDKVersion.empty();
}
/// \brief Get Windows SDK installation directory.
bool MSVCToolChain::getWindowsSDKDir(std::string &Path, int &Major,
std::string &WindowsSDKIncludeVersion,
std::string &WindowsSDKLibVersion) const {
std::string RegistrySDKVersion;
// Try the Windows registry.
if (!getSystemRegistryString(
"SOFTWARE\\Microsoft\\Microsoft SDKs\\Windows\\$VERSION",
"InstallationFolder", Path, &RegistrySDKVersion))
return false;
if (Path.empty() || RegistrySDKVersion.empty())
return false;
WindowsSDKIncludeVersion.clear();
WindowsSDKLibVersion.clear();
Major = 0;
std::sscanf(RegistrySDKVersion.c_str(), "v%d.", &Major);
if (Major <= 7)
return true;
if (Major == 8) {
// Windows SDK 8.x installs libraries in a folder whose names depend on the
// version of the OS you're targeting. By default choose the newest, which
// usually corresponds to the version of the OS you've installed the SDK on.
const char *Tests[] = {"winv6.3", "win8", "win7"};
for (const char *Test : Tests) {
llvm::SmallString<128> TestPath(Path);
llvm::sys::path::append(TestPath, "Lib", Test);
if (llvm::sys::fs::exists(TestPath.c_str())) {
WindowsSDKLibVersion = Test;
break;
}
}
return !WindowsSDKLibVersion.empty();
}
if (Major == 10) {
if (!getWindows10SDKVersion(Path, WindowsSDKIncludeVersion))
return false;
WindowsSDKLibVersion = WindowsSDKIncludeVersion;
return true;
}
// Unsupported SDK version
return false;
}
// Gets the library path required to link against the Windows SDK.
bool MSVCToolChain::getWindowsSDKLibraryPath(std::string &path) const {
std::string sdkPath;
int sdkMajor = 0;
std::string windowsSDKIncludeVersion;
std::string windowsSDKLibVersion;
path.clear();
if (!getWindowsSDKDir(sdkPath, sdkMajor, windowsSDKIncludeVersion,
windowsSDKLibVersion))
return false;
llvm::SmallString<128> libPath(sdkPath);
llvm::sys::path::append(libPath, "Lib");
if (sdkMajor <= 7) {
switch (getArch()) {
// In Windows SDK 7.x, x86 libraries are directly in the Lib folder.
case llvm::Triple::x86:
break;
case llvm::Triple::x86_64:
llvm::sys::path::append(libPath, "x64");
break;
case llvm::Triple::arm:
// It is not necessary to link against Windows SDK 7.x when targeting ARM.
return false;
default:
return false;
}
} else {
const StringRef archName = getWindowsSDKArch(getArch());
if (archName.empty())
return false;
llvm::sys::path::append(libPath, windowsSDKLibVersion, "um", archName);
}
path = libPath.str();
return true;
}
// Check if the Include path of a specified version of Visual Studio contains
// specific header files. If not, they are probably shipped with Universal CRT.
bool clang::driver::toolchains::MSVCToolChain::useUniversalCRT(
std::string &VisualStudioDir) const {
llvm::SmallString<128> TestPath(VisualStudioDir);
llvm::sys::path::append(TestPath, "VC\\include\\stdlib.h");
return !llvm::sys::fs::exists(TestPath);
}
bool MSVCToolChain::getUniversalCRTSdkDir(std::string &Path,
std::string &UCRTVersion) const {
// vcvarsqueryregistry.bat for Visual Studio 2015 queries the registry
// for the specific key "KitsRoot10". So do we.
if (!getSystemRegistryString(
"SOFTWARE\\Microsoft\\Windows Kits\\Installed Roots", "KitsRoot10",
Path, nullptr))
return false;
return getWindows10SDKVersion(Path, UCRTVersion);
}
bool MSVCToolChain::getUniversalCRTLibraryPath(std::string &Path) const {
std::string UniversalCRTSdkPath;
std::string UCRTVersion;
Path.clear();
if (!getUniversalCRTSdkDir(UniversalCRTSdkPath, UCRTVersion))
return false;
StringRef ArchName = getWindowsSDKArch(getArch());
if (ArchName.empty())
return false;
llvm::SmallString<128> LibPath(UniversalCRTSdkPath);
llvm::sys::path::append(LibPath, "Lib", UCRTVersion, "ucrt", ArchName);
Path = LibPath.str();
return true;
}
// Get the location to use for Visual Studio binaries. The location priority
// is: %VCINSTALLDIR% > %PATH% > newest copy of Visual Studio installed on
// system (as reported by the registry).
bool MSVCToolChain::getVisualStudioBinariesFolder(const char *clangProgramPath,
std::string &path) const {
path.clear();
SmallString<128> BinDir;
// First check the environment variables that vsvars32.bat sets.
llvm::Optional<std::string> VcInstallDir =
llvm::sys::Process::GetEnv("VCINSTALLDIR");
if (VcInstallDir.hasValue()) {
BinDir = VcInstallDir.getValue();
llvm::sys::path::append(BinDir, "bin");
} else {
// Next walk the PATH, trying to find a cl.exe in the path. If we find one,
// use that. However, make sure it's not clang's cl.exe.
llvm::Optional<std::string> OptPath = llvm::sys::Process::GetEnv("PATH");
if (OptPath.hasValue()) {
const char EnvPathSeparatorStr[] = {llvm::sys::EnvPathSeparator, '\0'};
SmallVector<StringRef, 8> PathSegments;
llvm::SplitString(OptPath.getValue(), PathSegments, EnvPathSeparatorStr);
for (StringRef PathSegment : PathSegments) {
if (PathSegment.empty())
continue;
SmallString<128> FilePath(PathSegment);
llvm::sys::path::append(FilePath, "cl.exe");
// Checking if cl.exe exists is a small optimization over calling
// can_execute, which really only checks for existence but will also do
// extra checks for cl.exe.exe. These add up when walking a long path.
if (llvm::sys::fs::exists(FilePath.c_str()) &&
!llvm::sys::fs::equivalent(FilePath.c_str(), clangProgramPath)) {
// If we found it on the PATH, use it exactly as is with no
// modifications.
path = PathSegment;
return true;
}
}
}
std::string installDir;
// With no VCINSTALLDIR and nothing on the PATH, if we can't find it in the
// registry then we have no choice but to fail.
if (!getVisualStudioInstallDir(installDir))
return false;
// Regardless of what binary we're ultimately trying to find, we make sure
// that this is a Visual Studio directory by checking for cl.exe. We use
// cl.exe instead of other binaries like link.exe because programs such as
// GnuWin32 also have a utility called link.exe, so cl.exe is the least
// ambiguous.
BinDir = installDir;
llvm::sys::path::append(BinDir, "VC", "bin");
SmallString<128> ClPath(BinDir);
llvm::sys::path::append(ClPath, "cl.exe");
if (!llvm::sys::fs::can_execute(ClPath.c_str()))
return false;
}
if (BinDir.empty())
return false;
switch (getArch()) {
case llvm::Triple::x86:
break;
case llvm::Triple::x86_64:
llvm::sys::path::append(BinDir, "amd64");
break;
case llvm::Triple::arm:
llvm::sys::path::append(BinDir, "arm");
break;
default:
// Whatever this is, Visual Studio doesn't have a toolchain for it.
return false;
}
path = BinDir.str();
return true;
}
VersionTuple MSVCToolChain::getMSVCVersionFromTriple() const {
unsigned Major, Minor, Micro;
getTriple().getEnvironmentVersion(Major, Minor, Micro);
if (Major || Minor || Micro)
return VersionTuple(Major, Minor, Micro);
return VersionTuple();
}
VersionTuple MSVCToolChain::getMSVCVersionFromExe() const {
VersionTuple Version;
#ifdef USE_WIN32
std::string BinPath;
if (!getVisualStudioBinariesFolder("", BinPath))
return Version;
SmallString<128> ClExe(BinPath);
llvm::sys::path::append(ClExe, "cl.exe");
std::wstring ClExeWide;
if (!llvm::ConvertUTF8toWide(ClExe.c_str(), ClExeWide))
return Version;
const DWORD VersionSize = ::GetFileVersionInfoSizeW(ClExeWide.c_str(),
nullptr);
if (VersionSize == 0)
return Version;
SmallVector<uint8_t, 4 * 1024> VersionBlock(VersionSize);
if (!::GetFileVersionInfoW(ClExeWide.c_str(), 0, VersionSize,
VersionBlock.data()))
return Version;
VS_FIXEDFILEINFO *FileInfo = nullptr;
UINT FileInfoSize = 0;
if (!::VerQueryValueW(VersionBlock.data(), L"\\",
reinterpret_cast<LPVOID *>(&FileInfo), &FileInfoSize) ||
FileInfoSize < sizeof(*FileInfo))
return Version;
const unsigned Major = (FileInfo->dwFileVersionMS >> 16) & 0xFFFF;
const unsigned Minor = (FileInfo->dwFileVersionMS ) & 0xFFFF;
const unsigned Micro = (FileInfo->dwFileVersionLS >> 16) & 0xFFFF;
Version = VersionTuple(Major, Minor, Micro);
#endif
return Version;
}
// Get Visual Studio installation directory.
bool MSVCToolChain::getVisualStudioInstallDir(std::string &path) const {
// First check the environment variables that vsvars32.bat sets.
if (llvm::Optional<std::string> VcInstallDir =
llvm::sys::Process::GetEnv("VCINSTALLDIR")) {
path = std::move(*VcInstallDir);
path = path.substr(0, path.find("\\VC"));
return true;
}
std::string vsIDEInstallDir;
std::string vsExpressIDEInstallDir;
// Then try the windows registry.
bool hasVCDir =
getSystemRegistryString("SOFTWARE\\Microsoft\\VisualStudio\\$VERSION",
"InstallDir", vsIDEInstallDir, nullptr);
if (hasVCDir && !vsIDEInstallDir.empty()) {
path = vsIDEInstallDir.substr(0, vsIDEInstallDir.find("\\Common7\\IDE"));
return true;
}
bool hasVCExpressDir =
getSystemRegistryString("SOFTWARE\\Microsoft\\VCExpress\\$VERSION",
"InstallDir", vsExpressIDEInstallDir, nullptr);
if (hasVCExpressDir && !vsExpressIDEInstallDir.empty()) {
path = vsExpressIDEInstallDir.substr(
0, vsIDEInstallDir.find("\\Common7\\IDE"));
return true;
}
// Try the environment.
std::string vcomntools;
if (llvm::Optional<std::string> vs120comntools =
llvm::sys::Process::GetEnv("VS120COMNTOOLS"))
vcomntools = std::move(*vs120comntools);
else if (llvm::Optional<std::string> vs100comntools =
llvm::sys::Process::GetEnv("VS100COMNTOOLS"))
vcomntools = std::move(*vs100comntools);
else if (llvm::Optional<std::string> vs90comntools =
llvm::sys::Process::GetEnv("VS90COMNTOOLS"))
vcomntools = std::move(*vs90comntools);
else if (llvm::Optional<std::string> vs80comntools =
llvm::sys::Process::GetEnv("VS80COMNTOOLS"))
vcomntools = std::move(*vs80comntools);
// Find any version we can.
if (!vcomntools.empty()) {
size_t p = vcomntools.find("\\Common7\\Tools");
if (p != std::string::npos)
vcomntools.resize(p);
path = std::move(vcomntools);
return true;
}
return false;
}
void MSVCToolChain::AddSystemIncludeWithSubfolder(
const ArgList &DriverArgs, ArgStringList &CC1Args,
const std::string &folder, const Twine &subfolder1, const Twine &subfolder2,
const Twine &subfolder3) const {
llvm::SmallString<128> path(folder);
llvm::sys::path::append(path, subfolder1, subfolder2, subfolder3);
addSystemInclude(DriverArgs, CC1Args, path);
}
void MSVCToolChain::AddClangSystemIncludeArgs(const ArgList &DriverArgs,
ArgStringList &CC1Args) const {
if (DriverArgs.hasArg(options::OPT_nostdinc))
return;
if (!DriverArgs.hasArg(options::OPT_nobuiltininc)) {
AddSystemIncludeWithSubfolder(DriverArgs, CC1Args, getDriver().ResourceDir,
"include");
}
// Add %INCLUDE%-like directories from the -imsvc flag.
for (const auto &Path : DriverArgs.getAllArgValues(options::OPT__SLASH_imsvc))
addSystemInclude(DriverArgs, CC1Args, Path);
if (DriverArgs.hasArg(options::OPT_nostdlibinc))
return;
// Honor %INCLUDE%. It should know essential search paths with vcvarsall.bat.
if (llvm::Optional<std::string> cl_include_dir =
llvm::sys::Process::GetEnv("INCLUDE")) {
SmallVector<StringRef, 8> Dirs;
StringRef(*cl_include_dir)
.split(Dirs, ";", /*MaxSplit=*/-1, /*KeepEmpty=*/false);
for (StringRef Dir : Dirs)
addSystemInclude(DriverArgs, CC1Args, Dir);
if (!Dirs.empty())
return;
}
std::string VSDir;
// When built with access to the proper Windows APIs, try to actually find
// the correct include paths first.
if (getVisualStudioInstallDir(VSDir)) {
AddSystemIncludeWithSubfolder(DriverArgs, CC1Args, VSDir, "VC\\include");
if (useUniversalCRT(VSDir)) {
std::string UniversalCRTSdkPath;
std::string UCRTVersion;
if (getUniversalCRTSdkDir(UniversalCRTSdkPath, UCRTVersion)) {
AddSystemIncludeWithSubfolder(DriverArgs, CC1Args, UniversalCRTSdkPath,
"Include", UCRTVersion, "ucrt");
}
}
std::string WindowsSDKDir;
int major;
std::string windowsSDKIncludeVersion;
std::string windowsSDKLibVersion;
if (getWindowsSDKDir(WindowsSDKDir, major, windowsSDKIncludeVersion,
windowsSDKLibVersion)) {
if (major >= 8) {
// Note: windowsSDKIncludeVersion is empty for SDKs prior to v10.
// Anyway, llvm::sys::path::append is able to manage it.
AddSystemIncludeWithSubfolder(DriverArgs, CC1Args, WindowsSDKDir,
"include", windowsSDKIncludeVersion,
"shared");
AddSystemIncludeWithSubfolder(DriverArgs, CC1Args, WindowsSDKDir,
"include", windowsSDKIncludeVersion,
"um");
AddSystemIncludeWithSubfolder(DriverArgs, CC1Args, WindowsSDKDir,
"include", windowsSDKIncludeVersion,
"winrt");
} else {
AddSystemIncludeWithSubfolder(DriverArgs, CC1Args, WindowsSDKDir,
"include");
}
} else {
addSystemInclude(DriverArgs, CC1Args, VSDir);
}
return;
}
#if defined(LLVM_ON_WIN32)
// As a fallback, select default install paths.
// FIXME: Don't guess drives and paths like this on Windows.
const StringRef Paths[] = {
"C:/Program Files/Microsoft Visual Studio 10.0/VC/include",
"C:/Program Files/Microsoft Visual Studio 9.0/VC/include",
"C:/Program Files/Microsoft Visual Studio 9.0/VC/PlatformSDK/Include",
"C:/Program Files/Microsoft Visual Studio 8/VC/include",
"C:/Program Files/Microsoft Visual Studio 8/VC/PlatformSDK/Include"
};
addSystemIncludes(DriverArgs, CC1Args, Paths);
#endif
}
void MSVCToolChain::AddClangCXXStdlibIncludeArgs(const ArgList &DriverArgs,
ArgStringList &CC1Args) const {
// FIXME: There should probably be logic here to find libc++ on Windows.
}
VersionTuple MSVCToolChain::computeMSVCVersion(const Driver *D,
const ArgList &Args) const {
bool IsWindowsMSVC = getTriple().isWindowsMSVCEnvironment();
VersionTuple MSVT = ToolChain::computeMSVCVersion(D, Args);
if (MSVT.empty()) MSVT = getMSVCVersionFromTriple();
if (MSVT.empty() && IsWindowsMSVC) MSVT = getMSVCVersionFromExe();
if (MSVT.empty() &&
Args.hasFlag(options::OPT_fms_extensions, options::OPT_fno_ms_extensions,
IsWindowsMSVC)) {
// -fms-compatibility-version=18.00 is default.
// FIXME: Consider bumping this to 19 (MSVC2015) soon.
MSVT = VersionTuple(18);
}
return MSVT;
}
std::string
MSVCToolChain::ComputeEffectiveClangTriple(const ArgList &Args,
types::ID InputType) const {
// The MSVC version doesn't care about the architecture, even though it
// may look at the triple internally.
VersionTuple MSVT = computeMSVCVersion(/*D=*/nullptr, Args);
MSVT = VersionTuple(MSVT.getMajor(), MSVT.getMinor().getValueOr(0),
MSVT.getSubminor().getValueOr(0));
// For the rest of the triple, however, a computed architecture name may
// be needed.
llvm::Triple Triple(ToolChain::ComputeEffectiveClangTriple(Args, InputType));
if (Triple.getEnvironment() == llvm::Triple::MSVC) {
StringRef ObjFmt = Triple.getEnvironmentName().split('-').second;
if (ObjFmt.empty())
Triple.setEnvironmentName((Twine("msvc") + MSVT.getAsString()).str());
else
Triple.setEnvironmentName(
(Twine("msvc") + MSVT.getAsString() + Twine('-') + ObjFmt).str());
}
return Triple.getTriple();
}
SanitizerMask MSVCToolChain::getSupportedSanitizers() const {
SanitizerMask Res = ToolChain::getSupportedSanitizers();
Res |= SanitizerKind::Address;
return Res;
}
static void TranslateOptArg(Arg *A, llvm::opt::DerivedArgList &DAL,
bool SupportsForcingFramePointer,
const char *ExpandChar, const OptTable &Opts) {
assert(A->getOption().matches(options::OPT__SLASH_O));
StringRef OptStr = A->getValue();
for (size_t I = 0, E = OptStr.size(); I != E; ++I) {
const char &OptChar = *(OptStr.data() + I);
switch (OptChar) {
default:
break;
case '1':
case '2':
case 'x':
case 'd':
if (&OptChar == ExpandChar) {
if (OptChar == 'd') {
DAL.AddFlagArg(A, Opts.getOption(options::OPT_O0));
} else {
if (OptChar == '1') {
DAL.AddJoinedArg(A, Opts.getOption(options::OPT_O), "s");
} else if (OptChar == '2' || OptChar == 'x') {
DAL.AddFlagArg(A, Opts.getOption(options::OPT_fbuiltin));
DAL.AddJoinedArg(A, Opts.getOption(options::OPT_O), "2");
}
if (SupportsForcingFramePointer &&
!DAL.hasArgNoClaim(options::OPT_fno_omit_frame_pointer))
DAL.AddFlagArg(A,
Opts.getOption(options::OPT_fomit_frame_pointer));
if (OptChar == '1' || OptChar == '2')
DAL.AddFlagArg(A,
Opts.getOption(options::OPT_ffunction_sections));
}
}
break;
case 'b':
if (I + 1 != E && isdigit(OptStr[I + 1])) {
switch (OptStr[I + 1]) {
case '0':
DAL.AddFlagArg(A, Opts.getOption(options::OPT_fno_inline));
break;
case '1':
DAL.AddFlagArg(A, Opts.getOption(options::OPT_finline_hint_functions));
break;
case '2':
DAL.AddFlagArg(A, Opts.getOption(options::OPT_finline_functions));
break;
}
++I;
}
break;
case 'g':
break;
case 'i':
if (I + 1 != E && OptStr[I + 1] == '-') {
++I;
DAL.AddFlagArg(A, Opts.getOption(options::OPT_fno_builtin));
} else {
DAL.AddFlagArg(A, Opts.getOption(options::OPT_fbuiltin));
}
break;
case 's':
DAL.AddJoinedArg(A, Opts.getOption(options::OPT_O), "s");
break;
case 't':
DAL.AddJoinedArg(A, Opts.getOption(options::OPT_O), "2");
break;
case 'y': {
bool OmitFramePointer = true;
if (I + 1 != E && OptStr[I + 1] == '-') {
OmitFramePointer = false;
++I;
}
if (SupportsForcingFramePointer) {
if (OmitFramePointer)
DAL.AddFlagArg(A,
Opts.getOption(options::OPT_fomit_frame_pointer));
else
DAL.AddFlagArg(
A, Opts.getOption(options::OPT_fno_omit_frame_pointer));
} else {
// Don't warn about /Oy- in 64-bit builds (where
// SupportsForcingFramePointer is false). The flag having no effect
// there is a compiler-internal optimization, and people shouldn't have
// to special-case their build files for 64-bit clang-cl.
A->claim();
}
break;
}
}
}
}
static void TranslateDArg(Arg *A, llvm::opt::DerivedArgList &DAL,
const OptTable &Opts) {
assert(A->getOption().matches(options::OPT_D));
StringRef Val = A->getValue();
size_t Hash = Val.find('#');
if (Hash == StringRef::npos || Hash > Val.find('=')) {
DAL.append(A);
return;
}
std::string NewVal = Val;
NewVal[Hash] = '=';
DAL.AddJoinedArg(A, Opts.getOption(options::OPT_D), NewVal);
}
llvm::opt::DerivedArgList *
MSVCToolChain::TranslateArgs(const llvm::opt::DerivedArgList &Args,
StringRef BoundArch, Action::OffloadKind) const {
DerivedArgList *DAL = new DerivedArgList(Args.getBaseArgs());
const OptTable &Opts = getDriver().getOpts();
// /Oy and /Oy- only has an effect under X86-32.
bool SupportsForcingFramePointer = getArch() == llvm::Triple::x86;
// The -O[12xd] flag actually expands to several flags. We must desugar the
// flags so that options embedded can be negated. For example, the '-O2' flag
// enables '-Oy'. Expanding '-O2' into its constituent flags allows us to
// correctly handle '-O2 -Oy-' where the trailing '-Oy-' disables a single
// aspect of '-O2'.
//
// Note that this expansion logic only applies to the *last* of '[12xd]'.
// First step is to search for the character we'd like to expand.
const char *ExpandChar = nullptr;
for (Arg *A : Args) {
if (!A->getOption().matches(options::OPT__SLASH_O))
continue;
StringRef OptStr = A->getValue();
for (size_t I = 0, E = OptStr.size(); I != E; ++I) {
char OptChar = OptStr[I];
char PrevChar = I > 0 ? OptStr[I - 1] : '0';
if (PrevChar == 'b') {
// OptChar does not expand; it's an argument to the previous char.
continue;
}
if (OptChar == '1' || OptChar == '2' || OptChar == 'x' || OptChar == 'd')
ExpandChar = OptStr.data() + I;
}
}
for (Arg *A : Args) {
if (A->getOption().matches(options::OPT__SLASH_O)) {
// The -O flag actually takes an amalgam of other options. For example,
// '/Ogyb2' is equivalent to '/Og' '/Oy' '/Ob2'.
TranslateOptArg(A, *DAL, SupportsForcingFramePointer, ExpandChar, Opts);
} else if (A->getOption().matches(options::OPT_D)) {
// Translate -Dfoo#bar into -Dfoo=bar.
TranslateDArg(A, *DAL, Opts);
} else {
DAL->append(A);
}
}
return DAL;
}
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