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annotate gen/linker.cpp @ 323:0d52412d5b1a trunk

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[svn r344] Fixed some very minor issues with the usage listing when calling llvmdc with no arguments. Changed the way moduleinfo is registered to use the same approach as DMD, this eliminates the need for correct linking order and should make the way for using a natively compiled runtime library. This should speed up linking tremendously and should now be possible. Fixed the llvm.used array to only be emitted if really necessary.
author lindquist
date Wed, 09 Jul 2008 23:43:51 +0200
parents 0baca2feb554
children 3c8c58c24aa8
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 #include "gen/llvm.h"
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2 #include "llvm/Linker.h"
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3 #include "llvm/System/Program.h"
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4 #if _WIN32
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5 #include "llvm/Support/SystemUtils.h"
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6 #endif
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7
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8 #include "root.h"
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9 #include "mars.h"
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10 #include "module.h"
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11
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12 #define NO_COUT_LOGGER
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13 #include "gen/logger.h"
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14
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15 //////////////////////////////////////////////////////////////////////////////
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16
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17 typedef std::vector<llvm::Module*> Module_vector;
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18
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19 void linkModules(llvm::Module* dst, const Module_vector& MV)
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20 {
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21 if (MV.empty())
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22 return;
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23
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24 llvm::Linker linker("llvmdc", dst);
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25
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26 std::string err;
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27 for (Module_vector::const_iterator i=MV.begin(); i!=MV.end(); ++i)
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28 {
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29 if (!linker.LinkInModule(*i, &err))
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30 {
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31 error("%s", err.c_str());
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32 fatal();
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33 }
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34 }
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35 }
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36
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37 //////////////////////////////////////////////////////////////////////////////
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38
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39 static llvm::sys::Path gExePath;
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40
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41 int linkExecutable(const char* argv0)
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42 {
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43 Logger::println("*** Linking executable ***");
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44
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45 // error string
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46 std::string errstr;
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47
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48 // find the llvm-ld program
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49 llvm::sys::Path ldpath = llvm::sys::Program::FindProgramByName("llvm-ld");
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50 if (ldpath.isEmpty())
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51 {
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52 ldpath.set("llvm-ld");
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53 }
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54
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55 // build arguments
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56 std::vector<const char*> args;
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57
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58 // first the program name ??
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59 args.push_back("llvm-ld");
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60
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61 // output filename
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62 std::string exestr;
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63 if (global.params.exefile)
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64 { // explicit
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65 exestr = global.params.exefile;
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66 }
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67 else
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68 { // inferred
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69 // try root module name
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70 if (Module::rootModule)
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71 exestr = Module::rootModule->toChars();
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72 else
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73 exestr = "a.out";
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74 }
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75 if (global.params.isWindows)
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76 exestr.append(".exe");
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77
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78 std::string outopt = "-o=" + exestr;
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79 args.push_back(outopt.c_str());
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80
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81 // set the global gExePath
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82 gExePath.set(exestr);
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83 assert(gExePath.isValid());
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84
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85 // create path to exe
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86 llvm::sys::Path exedir(gExePath);
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87 exedir.set(gExePath.getDirname());
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88 if (!exedir.exists())
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89 {
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90 exedir.createDirectoryOnDisk(true, &errstr);
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91 if (!errstr.empty())
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92 {
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93 error("failed to create path to linking output: %s\n%s", exedir.c_str(), errstr.c_str());
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94 fatal();
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95 }
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96 }
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97
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98 // strip debug info
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99 if (!global.params.symdebug)
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100 args.push_back("-strip-debug");
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101
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102 // optimization level
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103 if (!global.params.optimize)
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104 args.push_back("-disable-opt");
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105 else
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106 {
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107 const char* s = 0;
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108 switch(global.params.optimizeLevel)
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109 {
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110 case 0:
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111 s = "-O0"; break;
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112 case 1:
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113 s = "-O1"; break;
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114 case 2:
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115 s = "-O2"; break;
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116 case 3:
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117 s = "-O3"; break;
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118 case 4:
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119 s = "-O4"; break;
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120 case 5:
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121 s = "-O5"; break;
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122 default:
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123 assert(0);
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124 }
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125 args.push_back(s);
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126 }
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127
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128 // inlining
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129 if (!(global.params.useInline || global.params.llvmInline))
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130 {
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131 args.push_back("-disable-inlining");
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132 }
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133
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134 // additional linker switches
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135 for (int i = 0; i < global.params.linkswitches->dim; i++)
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136 {
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137 char *p = (char *)global.params.linkswitches->data[i];
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138 args.push_back(p);
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139 }
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140
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141 // native please
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142 args.push_back("-native");
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143
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144
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145 // user libs
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146 for (int i = 0; i < global.params.libfiles->dim; i++)
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147 {
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148 char *p = (char *)global.params.libfiles->data[i];
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149 args.push_back(p);
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150 }
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151
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152 // default libs
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153 args.push_back("-ltango-base-c-llvmdc");
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154 args.push_back("-lpthread");
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155 args.push_back("-ldl");
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156 args.push_back("-lm");
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157
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158 // object files
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159 for (int i = 0; i < global.params.objfiles->dim; i++)
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160 {
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161 char *p = (char *)global.params.objfiles->data[i];
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162 args.push_back(p);
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163 }
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164
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165 // runtime library
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166 // must be linked in last to null terminate the moduleinfo appending list
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167 std::string runtime_path(global.params.runtimePath);
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168 if (*runtime_path.rbegin() != '/')
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169 runtime_path.append("/");
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170 runtime_path.append("libtango-base-llvmdc.a");
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171 args.push_back(runtime_path.c_str());
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172
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173 // print link command?
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174 if (!global.params.quiet || global.params.verbose)
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175 {
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176 // Print it
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177 for (int i = 0; i < args.size(); i++)
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178 printf("%s ", args[i]);
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179 printf("\n");
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180 fflush(stdout);
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181 }
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182
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183 // terminate args list
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184 args.push_back(NULL);
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185
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186 // try to call linker!!!
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187 if (int status = llvm::sys::Program::ExecuteAndWait(ldpath, &args[0], NULL, NULL, 0,0, &errstr))
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188 {
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189 error("linking failed:\nstatus: %d", status);
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190 if (!errstr.empty())
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191 error("message: %s", errstr.c_str());
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192 fatal();
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193 }
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194 }
277
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195
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196 //////////////////////////////////////////////////////////////////////////////
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197
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198 void deleteExecutable()
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199 {
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200 if (!gExePath.isEmpty())
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201 {
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202 assert(gExePath.isValid());
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203 assert(!gExePath.isDirectory());
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204 gExePath.eraseFromDisk(false);
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205 }
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206 }
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207
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208 //////////////////////////////////////////////////////////////////////////////
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209
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210 int runExectuable()
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211 {
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212 assert(!gExePath.isEmpty());
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213 assert(gExePath.isValid());
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214
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215 // build arguments
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216 std::vector<const char*> args;
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217 for (size_t i = 0; i < global.params.runargs_length; i++)
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218 {
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219 char *a = global.params.runargs[i];
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220 args.push_back(a);
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221 }
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222 // terminate args list
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223 args.push_back(NULL);
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224
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225 // try to call linker!!!
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226 std::string errstr;
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227 int status = llvm::sys::Program::ExecuteAndWait(gExePath, &args[0], NULL, NULL, 0,0, &errstr);
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228 if (!errstr.empty())
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229 {
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230 error("failed to execute program");
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231 if (!errstr.empty())
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232 error("error message: %s", errstr.c_str());
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233 fatal();
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234 }
278
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235 return status;
277
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236 }