clang  10.0.0svn
MSP430.cpp
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1 //===--- MSP430.cpp - MSP430 Helpers for Tools ------------------*- C++ -*-===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 
9 #include "MSP430.h"
10 #include "CommonArgs.h"
11 #include "Gnu.h"
12 #include "InputInfo.h"
14 #include "clang/Driver/Multilib.h"
15 #include "clang/Driver/Options.h"
16 #include "llvm/Option/ArgList.h"
17 #include "llvm/Support/FileSystem.h"
18 #include "llvm/Support/Path.h"
19 
20 using namespace clang::driver;
21 using namespace clang::driver::toolchains;
22 using namespace clang::driver::tools;
23 using namespace clang;
24 using namespace llvm::opt;
25 
26 static bool isSupportedMCU(const StringRef MCU) {
27  return llvm::StringSwitch<bool>(MCU)
28 #define MSP430_MCU(NAME) .Case(NAME, true)
29 #include "clang/Basic/MSP430Target.def"
30  .Default(false);
31 }
32 
33 static StringRef getSupportedHWMult(const Arg *MCU) {
34  if (!MCU)
35  return "none";
36 
37  return llvm::StringSwitch<StringRef>(MCU->getValue())
38 #define MSP430_MCU_FEAT(NAME, HWMULT) .Case(NAME, HWMULT)
39 #include "clang/Basic/MSP430Target.def"
40  .Default("none");
41 }
42 
43 static StringRef getHWMultLib(const ArgList &Args) {
44  StringRef HWMult = Args.getLastArgValue(options::OPT_mhwmult_EQ, "auto");
45  if (HWMult == "auto") {
46  HWMult = getSupportedHWMult(Args.getLastArg(options::OPT_mmcu_EQ));
47  }
48 
49  return llvm::StringSwitch<StringRef>(HWMult)
50  .Case("16bit", "-lmul_16")
51  .Case("32bit", "-lmul_32")
52  .Case("f5series", "-lmul_f5")
53  .Default("-lmul_none");
54 }
55 
56 void msp430::getMSP430TargetFeatures(const Driver &D, const ArgList &Args,
57  std::vector<StringRef> &Features) {
58  const Arg *MCU = Args.getLastArg(options::OPT_mmcu_EQ);
59  if (MCU && !isSupportedMCU(MCU->getValue())) {
60  D.Diag(diag::err_drv_clang_unsupported) << MCU->getValue();
61  return;
62  }
63 
64  const Arg *HWMultArg = Args.getLastArg(options::OPT_mhwmult_EQ);
65  if (!MCU && !HWMultArg)
66  return;
67 
68  StringRef HWMult = HWMultArg ? HWMultArg->getValue() : "auto";
69  StringRef SupportedHWMult = getSupportedHWMult(MCU);
70 
71  if (HWMult == "auto") {
72  // 'auto' - deduce hw multiplier support based on mcu name provided.
73  // If no mcu name is provided, assume no hw multiplier is supported.
74  if (!MCU)
75  D.Diag(clang::diag::warn_drv_msp430_hwmult_no_device);
76  HWMult = SupportedHWMult;
77  }
78 
79  if (HWMult == "none") {
80  // 'none' - disable hw multiplier.
81  Features.push_back("-hwmult16");
82  Features.push_back("-hwmult32");
83  Features.push_back("-hwmultf5");
84  return;
85  }
86 
87  if (MCU && SupportedHWMult == "none")
88  D.Diag(clang::diag::warn_drv_msp430_hwmult_unsupported) << HWMult;
89  if (MCU && HWMult != SupportedHWMult)
90  D.Diag(clang::diag::warn_drv_msp430_hwmult_mismatch)
91  << SupportedHWMult << HWMult;
92 
93  if (HWMult == "16bit") {
94  // '16bit' - for 16-bit only hw multiplier.
95  Features.push_back("+hwmult16");
96  } else if (HWMult == "32bit") {
97  // '32bit' - for 16/32-bit hw multiplier.
98  Features.push_back("+hwmult32");
99  } else if (HWMult == "f5series") {
100  // 'f5series' - for 16/32-bit hw multiplier supported by F5 series mcus.
101  Features.push_back("+hwmultf5");
102  } else {
103  D.Diag(clang::diag::err_drv_unsupported_option_argument)
104  << HWMultArg->getAsString(Args) << HWMult;
105  }
106 }
107 
108 /// MSP430 Toolchain
109 MSP430ToolChain::MSP430ToolChain(const Driver &D, const llvm::Triple &Triple,
110  const ArgList &Args)
111  : Generic_ELF(D, Triple, Args) {
112 
113  StringRef MultilibSuf = "";
114 
115  GCCInstallation.init(Triple, Args);
116  if (GCCInstallation.isValid()) {
117  MultilibSuf = GCCInstallation.getMultilib().gccSuffix();
118 
119  SmallString<128> GCCBinPath;
120  llvm::sys::path::append(GCCBinPath,
121  GCCInstallation.getParentLibPath(), "..", "bin");
122  addPathIfExists(D, GCCBinPath, getProgramPaths());
123 
124  SmallString<128> GCCRtPath;
125  llvm::sys::path::append(GCCRtPath,
126  GCCInstallation.getInstallPath(), MultilibSuf);
127  addPathIfExists(D, GCCRtPath, getFilePaths());
128  }
129 
130  SmallString<128> SysRootDir(computeSysRoot());
131  llvm::sys::path::append(SysRootDir, "lib", MultilibSuf);
132  addPathIfExists(D, SysRootDir, getFilePaths());
133 }
134 
135 std::string MSP430ToolChain::computeSysRoot() const {
136  if (!getDriver().SysRoot.empty())
137  return getDriver().SysRoot;
138 
139  SmallString<128> Dir;
140  if (GCCInstallation.isValid())
141  llvm::sys::path::append(Dir, GCCInstallation.getParentLibPath(), "..",
142  GCCInstallation.getTriple().str());
143  else
144  llvm::sys::path::append(Dir, getDriver().Dir, "..", getTriple().str());
145 
146  return Dir.str();
147 }
148 
149 void MSP430ToolChain::AddClangSystemIncludeArgs(const ArgList &DriverArgs,
150  ArgStringList &CC1Args) const {
151  if (DriverArgs.hasArg(options::OPT_nostdinc) ||
152  DriverArgs.hasArg(options::OPT_nostdlibinc))
153  return;
154 
155  SmallString<128> Dir(computeSysRoot());
156  llvm::sys::path::append(Dir, "include");
157  addSystemInclude(DriverArgs, CC1Args, Dir.str());
158 }
159 
160 void MSP430ToolChain::addClangTargetOptions(const ArgList &DriverArgs,
161  ArgStringList &CC1Args,
162  Action::OffloadKind) const {
163  CC1Args.push_back("-nostdsysteminc");
164 
165  const auto *MCUArg = DriverArgs.getLastArg(options::OPT_mmcu_EQ);
166  if (!MCUArg)
167  return;
168 
169  const StringRef MCU = MCUArg->getValue();
170  if (MCU.startswith("msp430i")) {
171  // 'i' should be in lower case as it's defined in TI MSP430-GCC headers
172  CC1Args.push_back(DriverArgs.MakeArgString(
173  "-D__MSP430i" + MCU.drop_front(7).upper() + "__"));
174  } else {
175  CC1Args.push_back(DriverArgs.MakeArgString("-D__" + MCU.upper() + "__"));
176  }
177 }
178 
180  return new tools::msp430::Linker(*this);
181 }
182 
183 void msp430::Linker::ConstructJob(Compilation &C, const JobAction &JA,
184  const InputInfo &Output,
185  const InputInfoList &Inputs,
186  const ArgList &Args,
187  const char *LinkingOutput) const {
188  const ToolChain &ToolChain = getToolChain();
189  const Driver &D = ToolChain.getDriver();
190  std::string Linker = ToolChain.GetProgramPath(getShortName());
191  ArgStringList CmdArgs;
192 
193  if (!D.SysRoot.empty())
194  CmdArgs.push_back(Args.MakeArgString("--sysroot=" + D.SysRoot));
195 
196  Args.AddAllArgs(CmdArgs, options::OPT_L);
197  ToolChain.AddFilePathLibArgs(Args, CmdArgs);
198 
199  if (!Args.hasArg(options::OPT_T)) {
200  if (const Arg *MCUArg = Args.getLastArg(options::OPT_mmcu_EQ))
201  CmdArgs.push_back(
202  Args.MakeArgString("-T" + StringRef(MCUArg->getValue()) + ".ld"));
203  } else {
204  Args.AddAllArgs(CmdArgs, options::OPT_T);
205  }
206 
207  if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nostartfiles)) {
208  CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath("crt0.o")));
209  CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath("crtbegin.o")));
210  }
211 
212  AddLinkerInputs(getToolChain(), Inputs, Args, CmdArgs, JA);
213 
214  CmdArgs.push_back("--start-group");
215  CmdArgs.push_back(Args.MakeArgString(getHWMultLib(Args)));
216  CmdArgs.push_back("-lgcc");
217  if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nodefaultlibs)) {
218  CmdArgs.push_back("-lc");
219  CmdArgs.push_back("-lcrt");
220  CmdArgs.push_back("-lnosys");
221  }
222  CmdArgs.push_back("--end-group");
223 
224  if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nostartfiles)) {
225  CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath("crtend.o")));
226  CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath("crtn.o")));
227  }
228  CmdArgs.push_back("-o");
229  CmdArgs.push_back(Output.getFilename());
230  C.addCommand(std::make_unique<Command>(JA, *this, Args.MakeArgString(Linker),
231  CmdArgs, Inputs));
232 }
Tool * buildLinker() const override
Definition: MSP430.cpp:179
const llvm::Triple & getTriple() const
Get the GCC triple for the detected install.
Definition: Gnu.h:219
DiagnosticBuilder Diag(unsigned DiagID) const
Definition: Driver.h:108
static bool isSupportedMCU(const StringRef MCU)
Definition: MSP430.cpp:26
const char * getFilename() const
Definition: InputInfo.h:83
GCCInstallationDetector GCCInstallation
Definition: Gnu.h:279
#define MSP430_MCU(NAME)
path_list & getProgramPaths()
Definition: ToolChain.h:238
const std::string & gccSuffix() const
Get the detected GCC installation path suffix for the multi-arch target variant.
Definition: Multilib.h:45
InputInfo - Wrapper for information about an input source.
Definition: InputInfo.h:22
std::string GetFilePath(const char *Name) const
Definition: ToolChain.cpp:503
path_list & getFilePaths()
Definition: ToolChain.h:235
Driver - Encapsulate logic for constructing compilation processes from a set of gcc-driver-like comma...
Definition: Driver.h:59
void addCommand(std::unique_ptr< Command > C)
Definition: Compilation.h:205
void addClangTargetOptions(const llvm::opt::ArgList &DriverArgs, llvm::opt::ArgStringList &CC1Args, Action::OffloadKind) const override
Add options that need to be passed to cc1 for this target.
Definition: MSP430.cpp:160
void AddFilePathLibArgs(const llvm::opt::ArgList &Args, llvm::opt::ArgStringList &CmdArgs) const
AddFilePathLibArgs - Add each thing in getFilePaths() as a "-L" option.
Definition: ToolChain.cpp:887
#define MSP430_MCU_FEAT(NAME, HWMULT)
const Driver & getDriver() const
Definition: ToolChain.h:197
MSP430ToolChain(const Driver &D, const llvm::Triple &Triple, const llvm::opt::ArgList &Args)
MSP430 Toolchain.
Definition: MSP430.cpp:109
static void addSystemInclude(const llvm::opt::ArgList &DriverArgs, llvm::opt::ArgStringList &CC1Args, const Twine &Path)
Utility function to add a system include directory to CC1 arguments.
Definition: ToolChain.cpp:801
StringRef getParentLibPath() const
Get the detected GCC parent lib path.
Definition: Gnu.h:225
Dataflow Directional Tag Classes.
void AddLinkerInputs(const ToolChain &TC, const InputInfoList &Inputs, const llvm::opt::ArgList &Args, llvm::opt::ArgStringList &CmdArgs, const JobAction &JA)
std::string SysRoot
sysroot, if present
Definition: Driver.h:147
static StringRef getHWMultLib(const ArgList &Args)
Definition: MSP430.cpp:43
Tool - Information on a specific compilation tool.
Definition: Tool.h:33
void getMSP430TargetFeatures(const Driver &D, const llvm::opt::ArgList &Args, std::vector< llvm::StringRef > &Features)
void AddClangSystemIncludeArgs(const llvm::opt::ArgList &DriverArgs, llvm::opt::ArgStringList &CC1Args) const override
Add the clang cc1 arguments for system include paths.
Definition: MSP430.cpp:149
Compilation - A set of tasks to perform for a single driver invocation.
Definition: Compilation.h:45
const llvm::Triple & getTriple() const
Definition: ToolChain.h:199
std::string GetProgramPath(const char *Name) const
Definition: ToolChain.cpp:507
void addPathIfExists(const Driver &D, const Twine &Path, ToolChain::path_list &Paths)
Definition: CommonArgs.cpp:65
void init(const llvm::Triple &TargetTriple, const llvm::opt::ArgList &Args, ArrayRef< std::string > ExtraTripleAliases=None)
Initialize a GCCInstallationDetector from the driver.
Definition: Gnu.cpp:1759
static StringRef getSupportedHWMult(const Arg *MCU)
Definition: MSP430.cpp:33
StringRef getInstallPath() const
Get the detected GCC installation path.
Definition: Gnu.h:222
const Multilib & getMultilib() const
Get the detected Multilib.
Definition: Gnu.h:228
ToolChain - Access to tools for a single platform.
Definition: ToolChain.h:88
bool isValid() const
Check whether we detected a valid GCC install.
Definition: Gnu.h:216