MSP430.cpp revision 360784 
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"
13#include "clang/Driver/Compilation.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
20using namespace clang::driver;
21using namespace clang::driver::toolchains;
22using namespace clang::driver::tools;
23using namespace clang;
24using namespace llvm::opt;
25
26static 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
33static 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
43static 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
56void 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
109MSP430ToolChain::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
135std::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
149void 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
160void 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
179Tool *MSP430ToolChain::buildLinker() const {
180  return new tools::msp430::Linker(*this);
181}
182
183void 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}
233