Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 1 | <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" |
| 2 | "http://www.w3.org/TR/html4/strict.dtd"> |
Guochun Shi | f4688a8 | 2002-07-17 23:05:56 +0000 | [diff] [blame] | 3 | <html> |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 4 | <head> |
| 5 | <title>Getting Started with LLVM System</title> |
| 6 | <link rel="stylesheet" href="llvm.css" type="text/css"> |
| 7 | </head> |
| 8 | <body> |
John Criswell | 85ed361 | 2003-06-12 19:34:44 +0000 | [diff] [blame] | 9 | |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 10 | <div class="doc_title"> |
| 11 | Getting Started with the LLVM System |
| 12 | </div> |
John Criswell | 85ed361 | 2003-06-12 19:34:44 +0000 | [diff] [blame] | 13 | |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 14 | <ul> |
| 15 | <li><a href="#overview">Overview</a> |
| 16 | <li><a href="#quickstart">Getting Started Quickly (A Summary)</a> |
| 17 | <li><a href="#requirements">Requirements</a> |
Chris Lattner | 96768ea | 2003-02-14 04:22:13 +0000 | [diff] [blame] | 18 | <ol> |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 19 | <li><a href="#hardware">Hardware</a> |
| 20 | <li><a href="#software">Software</a> |
Chris Lattner | 95e9258 | 2004-07-18 22:32:22 +0000 | [diff] [blame] | 21 | <li><a href="#brokengcc">Broken versions of GCC</a> |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 22 | </ol></li> |
John Criswell | 7a73b80 | 2003-06-30 21:59:07 +0000 | [diff] [blame] | 23 | |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 24 | <li><a href="#starting">Getting Started with LLVM</a> |
John Criswell | 0b45920 | 2003-07-08 20:35:59 +0000 | [diff] [blame] | 25 | <ol> |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 26 | <li><a href="#terminology">Terminology and Notation</a> |
| 27 | <li><a href="#environment">Setting Up Your Environment</a> |
| 28 | <li><a href="#unpack">Unpacking the LLVM Archives</a> |
| 29 | <li><a href="#checkout">Checkout LLVM from CVS</a> |
| 30 | <li><a href="#installcf">Install the GCC Front End</a> |
| 31 | <li><a href="#config">Local LLVM Configuration</a> |
| 32 | <li><a href="#compile">Compiling the LLVM Suite Source Code</a> |
| 33 | <li><a href="#objfiles">The Location of LLVM Object Files</a> |
Chris Lattner | a553f62 | 2004-03-25 20:38:40 +0000 | [diff] [blame] | 34 | <li><a href="#optionalconfig">Optional Configuration Items</a> |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 35 | </ol></li> |
John Criswell | 0b45920 | 2003-07-08 20:35:59 +0000 | [diff] [blame] | 36 | |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 37 | <li><a href="#layout">Program layout</a> |
| 38 | <ol> |
| 39 | <li><a href="#cvsdir"><tt>CVS</tt> directories</a> |
| 40 | <li><a href="#include"><tt>llvm/include</tt></a> |
| 41 | <li><a href="#lib"><tt>llvm/lib</tt></a> |
| 42 | <li><a href="#runtime"><tt>llvm/runtime</tt></a> |
| 43 | <li><a href="#test"><tt>llvm/test</tt></a> |
| 44 | <li><a href="#tools"><tt>llvm/tools</tt></a> |
| 45 | <li><a href="#utils"><tt>llvm/utils</tt></a> |
| 46 | </ol></li> |
John Criswell | 0f6d7c0 | 2003-10-27 18:18:16 +0000 | [diff] [blame] | 47 | |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 48 | <li><a href="#tutorial">An Example Using the LLVM Tool Chain</a> |
| 49 | <li><a href="#problems">Common Problems</a> |
| 50 | <li><a href="#links">Links</a> |
| 51 | </ul> |
| 52 | |
Chris Lattner | 7911ce2 | 2004-05-23 21:07:27 +0000 | [diff] [blame] | 53 | <div class="doc_author"> |
| 54 | <p>Written by: |
| 55 | <a href="mailto:criswell@uiuc.edu">John Criswell</a>, |
| 56 | <a href="mailto:sabre@nondot.org">Chris Lattner</a>, |
| 57 | <a href="http://misha.brukman.net">Misha Brukman</a>, |
| 58 | <a href="http://www.cs.uiuc.edu/~vadve">Vikram Adve</a>, and |
| 59 | <a href="mailto:gshi1@uiuc.edu">Guochun Shi</a>. |
| 60 | </p> |
| 61 | </div> |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 62 | |
| 63 | |
| 64 | <!-- *********************************************************************** --> |
| 65 | <div class="doc_section"> |
| 66 | <a name="overview"><b>Overview</b></a> |
| 67 | </div> |
| 68 | <!-- *********************************************************************** --> |
| 69 | |
| 70 | <div class="doc_text"> |
| 71 | |
| 72 | <p>Welcome to LLVM! In order to get started, you first need to know some |
| 73 | basic information.</p> |
| 74 | |
| 75 | <p>First, LLVM comes in two pieces. The first piece is the LLVM suite. This |
| 76 | contains all of the tools, libraries, and header files needed to use the low |
| 77 | level virtual machine. It contains an assembler, disassembler, bytecode |
| 78 | analyzer, and bytecode optimizer. It also contains a test suite that can be |
| 79 | used to test the LLVM tools and the GCC front end.</p> |
| 80 | |
| 81 | <p>The second piece is the GCC front end. This component provides a version of |
| 82 | GCC that compiles C and C++ code into LLVM bytecode. Currently, the GCC front |
| 83 | end is a modified version of GCC 3.4 (we track the GCC 3.4 development). Once |
| 84 | compiled into LLVM bytecode, a program can be manipulated with the LLVM tools |
| 85 | from the LLVM suite.</p> |
| 86 | |
| 87 | </div> |
| 88 | |
| 89 | <!-- *********************************************************************** --> |
| 90 | <div class="doc_section"> |
| 91 | <a name="quickstart"><b>Getting Started Quickly (A Summary)</b></a> |
| 92 | </div> |
| 93 | <!-- *********************************************************************** --> |
| 94 | |
| 95 | <div class="doc_text"> |
| 96 | |
| 97 | <p>Here's the short story for getting up and running quickly with LLVM:</p> |
| 98 | |
| 99 | <ol> |
| 100 | <li>Install the GCC front end: |
| 101 | <ol> |
| 102 | <li><tt>cd <i>where-you-want-the-C-front-end-to-live</i></tt> |
| 103 | <li><tt>gunzip --stdout cfrontend.<i>platform</i>.tar.gz | tar -xvf -</tt> |
John Criswell | 364cec4 | 2004-03-12 20:31:37 +0000 | [diff] [blame] | 104 | <li><b>Sparc and MacOS X Only:</b><br> |
| 105 | <tt>cd cfrontend/<i>platform</i><br> |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 106 | ./fixheaders</tt> |
| 107 | </ol></li> |
| 108 | |
| 109 | <li>Get the Source Code |
| 110 | <ul> |
| 111 | <li>With the distributed files: |
| 112 | <ol> |
| 113 | <li><tt>cd <i>where-you-want-llvm-to-live</i></tt> |
John Criswell | 364cec4 | 2004-03-12 20:31:37 +0000 | [diff] [blame] | 114 | <li><tt>gunzip --stdout llvm-<i>version</i>.tar.gz | tar -xvf -</tt> |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 115 | <li><tt>cd llvm</tt> |
| 116 | </ol></li> |
| 117 | |
Misha Brukman | b3707ba | 2004-06-18 20:18:31 +0000 | [diff] [blame] | 118 | <li>With anonymous CVS access (or use a <a href="#mirror">mirror</a>): |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 119 | <ol> |
| 120 | <li><tt>cd <i>where-you-want-llvm-to-live</i></tt></li> |
| 121 | <li><tt>cvs -d |
| 122 | :pserver:anon@llvm-cvs.cs.uiuc.edu:/var/cvs/llvm login</tt></li> |
| 123 | <li>Hit the return key when prompted for the password. |
| 124 | <li><tt>cvs -z3 -d :pserver:anon@llvm-cvs.cs.uiuc.edu:/var/cvs/llvm |
| 125 | co llvm</tt></li> |
| 126 | <li><tt>cd llvm</tt></li> |
| 127 | </ol></li> |
| 128 | </ul></li> |
| 129 | |
| 130 | <li>Configure the LLVM Build Environment |
| 131 | <ol> |
| 132 | <li>Change directory to where you want to store the LLVM object |
| 133 | files and run <tt>configure</tt> to configure the Makefiles and |
| 134 | header files for the default platform. Useful options include: |
| 135 | <ul> |
| 136 | <li><tt>--with-llvmgccdir=<i>directory</i></tt> |
John Criswell | d000e1d | 2003-12-18 16:43:17 +0000 | [diff] [blame] | 137 | <p>Specify the full pathname of where the LLVM GCC frontend is |
| 138 | installed.</p></li> |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 139 | <li><tt>--enable-spec2000=<i>directory</i></tt> |
| 140 | <p>Enable the SPEC2000 benchmarks for testing. The SPEC2000 |
| 141 | benchmarks should be available in |
| 142 | <tt><i>directory</i></tt>.</p></li> |
| 143 | </ul> |
| 144 | </ol></li> |
| 145 | |
| 146 | <li>Build the LLVM Suite: |
| 147 | <ol> |
Chris Lattner | 95e9258 | 2004-07-18 22:32:22 +0000 | [diff] [blame] | 148 | <li>Set your LLVM_LIB_SEARCH_PATH environment variable.</li> |
| 149 | <li><tt>gmake -k |& tee gnumake.out |
| 150 | # this is csh or tcsh syntax</tt></li> |
| 151 | <li>If you get an "internal compiler error (ICE)" see <a href="#brokengcc">below</a>.</li> |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 152 | </ol> |
| 153 | |
| 154 | </ol> |
| 155 | |
Chris Lattner | fcd3725 | 2004-06-21 22:52:48 +0000 | [diff] [blame] | 156 | <p>Consult the <a href="#starting">Getting Started with LLVM</a> section for |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 157 | detailed information on configuring and compiling LLVM. See <a |
| 158 | href="#environment">Setting Up Your Environment</a> for tips that simplify |
| 159 | working with the GCC front end and LLVM tools. Go to <a href="#layout">Program |
| 160 | Layout</a> to learn about the layout of the source code tree.</p> |
| 161 | |
| 162 | </div> |
| 163 | |
| 164 | <!-- *********************************************************************** --> |
| 165 | <div class="doc_section"> |
| 166 | <a name="requirements"><b>Requirements</b></a> |
| 167 | </div> |
| 168 | <!-- *********************************************************************** --> |
| 169 | |
| 170 | <div class="doc_text"> |
| 171 | |
| 172 | <p>Before you begin to use the LLVM system, review the requirements given below. |
| 173 | This may save you some trouble by knowing ahead of time what hardware and |
| 174 | software you will need.</p> |
| 175 | |
| 176 | </div> |
| 177 | |
| 178 | <!-- ======================================================================= --> |
| 179 | <div class="doc_subsection"> |
| 180 | <a name="hardware"><b>Hardware</b></a> |
| 181 | </div> |
| 182 | |
| 183 | <div class="doc_text"> |
| 184 | |
| 185 | <p>LLVM is known to work on the following platforms:</p> |
| 186 | |
| 187 | <ul> |
| 188 | |
| 189 | <li>Linux on x86 (Pentium and above) |
| 190 | <ul> |
John Criswell | 18b7464 | 2004-08-16 14:51:33 +0000 | [diff] [blame] | 191 | <li>Approximately 2.6 GB of Free Disk Space |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 192 | <ul> |
John Criswell | 18b7464 | 2004-08-16 14:51:33 +0000 | [diff] [blame] | 193 | <li>Source code: 57 MB</li> |
| 194 | <li>Object code: 2.5 GB</li> |
| 195 | <li>GCC front end: 30 MB</li> |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 196 | </ul></li> |
John Criswell | d000e1d | 2003-12-18 16:43:17 +0000 | [diff] [blame] | 197 | </ul> |
| 198 | </li> |
| 199 | |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 200 | <li>Solaris on SparcV9 (Ultrasparc) |
| 201 | <ul> |
John Criswell | 18b7464 | 2004-08-16 14:51:33 +0000 | [diff] [blame] | 202 | <li>Approximately 2.6 GB of Free Disk Space |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 203 | <ul> |
John Criswell | 18b7464 | 2004-08-16 14:51:33 +0000 | [diff] [blame] | 204 | <li>Source code: 57 MB</li> |
| 205 | <li>Object code: 2.5 GB</li> |
| 206 | <li>GCC front end: 46 MB</li> |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 207 | </ul></li> |
John Criswell | d000e1d | 2003-12-18 16:43:17 +0000 | [diff] [blame] | 208 | </ul> |
| 209 | </li> |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 210 | |
John Criswell | d000e1d | 2003-12-18 16:43:17 +0000 | [diff] [blame] | 211 | <li>FreeBSD on x86 (Pentium and above) |
| 212 | <ul> |
John Criswell | 18b7464 | 2004-08-16 14:51:33 +0000 | [diff] [blame] | 213 | <li>Approximately 1 GB of Free Disk Space |
John Criswell | d000e1d | 2003-12-18 16:43:17 +0000 | [diff] [blame] | 214 | <ul> |
John Criswell | 18b7464 | 2004-08-16 14:51:33 +0000 | [diff] [blame] | 215 | <li>Source code: 57 MB</li> |
John Criswell | d000e1d | 2003-12-18 16:43:17 +0000 | [diff] [blame] | 216 | <li>Object code: 850 MB</li> |
| 217 | <li>GCC front end: 40 MB</li> |
| 218 | </ul></li> |
| 219 | </ul> |
| 220 | </li> |
| 221 | |
John Criswell | d000e1d | 2003-12-18 16:43:17 +0000 | [diff] [blame] | 222 | <li>MacOS X on PowerPC |
| 223 | <ul> |
John Criswell | 18b7464 | 2004-08-16 14:51:33 +0000 | [diff] [blame] | 224 | <li>Experimental support for static native code generation |
| 225 | <li>Approximately 1.6 GB of Free Disk Space |
John Criswell | d000e1d | 2003-12-18 16:43:17 +0000 | [diff] [blame] | 226 | <ul> |
John Criswell | 18b7464 | 2004-08-16 14:51:33 +0000 | [diff] [blame] | 227 | <li>Source code: 57 MB</li> |
| 228 | <li>Object code: 1.5 GB</li> |
| 229 | <li>GCC front end: 36 MB</li> |
John Criswell | d000e1d | 2003-12-18 16:43:17 +0000 | [diff] [blame] | 230 | </ul></li> |
| 231 | </ul> |
John Criswell | d000e1d | 2003-12-18 16:43:17 +0000 | [diff] [blame] | 232 | </li> |
Misha Brukman | 22e9e33 | 2004-08-09 19:57:01 +0000 | [diff] [blame] | 233 | |
| 234 | <li>AIX on PowerPC |
| 235 | <ul> |
| 236 | <li><div class="doc_warning">No native code generation</div> |
| 237 | <li>Approximately 2 GB of Free Disk Space |
| 238 | <ul> |
| 239 | <li>Source code: 92 MB</li> |
| 240 | <li>Object code: 2.8 GB</li> |
| 241 | <li>GCC front end: 123 MB</li> |
| 242 | </ul></li> |
| 243 | </ul> |
| 244 | </li> |
| 245 | |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 246 | </ul> |
| 247 | |
| 248 | <p>The LLVM suite <i>may</i> compile on other platforms, but it is not |
| 249 | guaranteed to do so. If compilation is successful, the LLVM utilities should be |
| 250 | able to assemble, disassemble, analyze, and optimize LLVM bytecode. Code |
| 251 | generation should work as well, although the generated native code may not work |
| 252 | on your platform.</p> |
| 253 | |
| 254 | <p>The GCC front end is not very portable at the moment. If you want to get it |
Misha Brukman | 22e9e33 | 2004-08-09 19:57:01 +0000 | [diff] [blame] | 255 | to work on another platform, you can download a copy of the source and <a |
| 256 | href="CFEBuildInstrs.html">try to compile it</a> on your platform.</p> |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 257 | |
| 258 | </div> |
| 259 | |
| 260 | <!-- ======================================================================= --> |
| 261 | <div class="doc_subsection"> |
| 262 | <a name="software"><b>Software</b></a> |
| 263 | </div> |
| 264 | |
| 265 | <div class="doc_text"> |
| 266 | |
| 267 | <p>Compiling LLVM requires that you have several software packages |
| 268 | installed:</p> |
| 269 | |
| 270 | <ul> |
| 271 | <li><a href="http://gcc.gnu.org">GCC 3.x with C and C++ language |
Chris Lattner | 95e9258 | 2004-07-18 22:32:22 +0000 | [diff] [blame] | 272 | support</a> (See <a href="#brokengcc">below</a> for specific version info)</li> |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 273 | |
| 274 | <li><a href="http://savannah.gnu.org/projects/make">GNU Make</a></li> |
| 275 | |
| 276 | <li><a href="http://www.gnu.org/software/flex">Flex</a></li> |
| 277 | |
| 278 | <li><a href="http://www.gnu.org/software/bison/bison.html">Bison</a></li> |
| 279 | </ul> |
| 280 | |
| 281 | <p>There are some additional tools that you may want to have when working with |
| 282 | LLVM:</p> |
| 283 | |
| 284 | <ul> |
Brian Gaeke | 5c681b6 | 2004-02-08 07:49:04 +0000 | [diff] [blame] | 285 | <li><A href="http://www.gnu.org/software/automake">GNU Automake</A></li> |
| 286 | <li><A href="http://www.gnu.org/software/autoconf">GNU Autoconf</A></li> |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 287 | <li><A href="http://savannah.gnu.org/projects/m4">GNU M4</A> |
| 288 | |
| 289 | <p>If you want to make changes to the configure scripts, you will need GNU |
| 290 | autoconf (2.57 or higher), and consequently, GNU M4 (version 1.4 or |
Brian Gaeke | 5c681b6 | 2004-02-08 07:49:04 +0000 | [diff] [blame] | 291 | higher). You will also need automake. Any old version of |
| 292 | automake from 1.4p5 on should work; we only use aclocal from that |
| 293 | package.</p></li> |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 294 | |
John Criswell | d179961 | 2004-03-29 20:23:11 +0000 | [diff] [blame] | 295 | <li><A href="http://www.codesourcery.com/qm/qmtest">QMTest 2.0.3</A></li> |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 296 | <li><A href="http://www.python.org">Python</A> |
| 297 | |
John Criswell | d179961 | 2004-03-29 20:23:11 +0000 | [diff] [blame] | 298 | <p> |
| 299 | These are needed to use the LLVM test suite. Please note that newer |
| 300 | versions of QMTest may not work with the LLVM test suite. QMTest 2.0.3 |
| 301 | can be retrieved from the QMTest CVS repository using the following |
Misha Brukman | b9be2bf | 2004-05-12 19:25:59 +0000 | [diff] [blame] | 302 | commands:</p> |
John Criswell | d179961 | 2004-03-29 20:23:11 +0000 | [diff] [blame] | 303 | <ul> |
| 304 | <li><tt>cvs -d :pserver:anoncvs@cvs.codesourcery.com:/home/qm/Repository login</tt> |
| 305 | </li> |
| 306 | <li>When prompted, use <tt>anoncvs</tt> as the password. |
| 307 | </li> |
| 308 | <li><tt>cvs -d :pserver:anoncvs@cvs.codesourcery.com:/home/qm/Repository co -r release-2-0-3 qm</tt> |
| 309 | </li> |
| 310 | </ul> |
Misha Brukman | b9be2bf | 2004-05-12 19:25:59 +0000 | [diff] [blame] | 311 | </li> |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 312 | |
| 313 | </ul> |
Chris Lattner | 95e9258 | 2004-07-18 22:32:22 +0000 | [diff] [blame] | 314 | </div> |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 315 | |
Chris Lattner | 95e9258 | 2004-07-18 22:32:22 +0000 | [diff] [blame] | 316 | <!-- ======================================================================= --> |
| 317 | <div class="doc_subsection"> |
| 318 | <a name="brokengcc">Broken versions of GCC</a> |
| 319 | </div> |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 320 | |
Chris Lattner | 95e9258 | 2004-07-18 22:32:22 +0000 | [diff] [blame] | 321 | <div class="doc_text"> |
| 322 | |
| 323 | <p>LLVM is very demanding of the host C++ compiler, and as such tends to expose |
| 324 | bugs in the compiler. In particular, several versions of GCC crash when trying |
| 325 | to compile LLVM. We routinely use GCC 3.3.3 and GCC 3.4.0 and have had success |
| 326 | with them. Other versions of GCC will probably work as well. GCC versions listed |
| 327 | here are known to not work. If you are using one of these versions, please try |
| 328 | to upgrade your GCC to something more recent. If you run into a problem with a |
| 329 | version of GCC not listed here, please <a href="mailto:llvmdev@cs.uiuc.edu">let |
| 330 | us know</a>. Please use the "<tt>gcc -v</tt>" command to find out which version |
| 331 | of GCC you are using. |
| 332 | </p> |
| 333 | |
| 334 | <p><b>GCC versions prior to 3.0</b>: GCC 2.96.x and before had several |
| 335 | problems in the STL that effectively prevent it from compiling LLVM. |
| 336 | </p> |
| 337 | |
| 338 | <p><b>GCC 3.3.2</b>: This version of GCC suffered from a <a |
| 339 | href="http://gcc.gnu.org/PR13392">serious bug</a> which causes it to crash in |
| 340 | the "<tt>convert_from_eh_region_ranges_1</tt>" GCC function.</p> |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 341 | |
| 342 | </div> |
| 343 | |
Chris Lattner | 95e9258 | 2004-07-18 22:32:22 +0000 | [diff] [blame] | 344 | |
| 345 | |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 346 | <!-- *********************************************************************** --> |
| 347 | <div class="doc_section"> |
| 348 | <a name="starting"><b>Getting Started with LLVM</b></a> |
| 349 | </div> |
| 350 | <!-- *********************************************************************** --> |
| 351 | |
Chris Lattner | 95e9258 | 2004-07-18 22:32:22 +0000 | [diff] [blame] | 352 | <div class="doc_text"> |
| 353 | |
| 354 | <p>The remainder of this guide is meant to get you up and running with |
| 355 | LLVM and to give you some basic information about the LLVM environment.</p> |
| 356 | |
| 357 | <p>The later sections of this guide describe the <a |
| 358 | href="#layout">general layout</a> of the the LLVM source tree, a <a |
| 359 | href="#tutorial">simple example</a> using the LLVM tool chain, and <a |
| 360 | href="#links">links</a> to find more information about LLVM or to get |
| 361 | help via e-mail.</p> |
| 362 | </div> |
| 363 | |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 364 | <!-- ======================================================================= --> |
| 365 | <div class="doc_subsection"> |
| 366 | <a name="terminology">Terminology and Notation</a> |
| 367 | </div> |
| 368 | |
| 369 | <div class="doc_text"> |
| 370 | |
| 371 | <p>Throughout this manual, the following names are used to denote paths |
| 372 | specific to the local system and working environment. <i>These are not |
| 373 | environment variables you need to set but just strings used in the rest |
| 374 | of this document below</i>. In any of the examples below, simply replace |
| 375 | each of these names with the appropriate pathname on your local system. |
| 376 | All these paths are absolute:</p> |
| 377 | |
Misha Brukman | 54111c4 | 2004-01-20 00:20:17 +0000 | [diff] [blame] | 378 | <dl> |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 379 | <dt>SRC_ROOT |
| 380 | <dd> |
| 381 | This is the top level directory of the LLVM source tree. |
John Criswell | 0f6d7c0 | 2003-10-27 18:18:16 +0000 | [diff] [blame] | 382 | <p> |
| 383 | |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 384 | <dt>OBJ_ROOT |
| 385 | <dd> |
| 386 | This is the top level directory of the LLVM object tree (i.e. the |
| 387 | tree where object files and compiled programs will be placed. It |
| 388 | can be the same as SRC_ROOT). |
| 389 | <p> |
| 390 | |
| 391 | <dt>LLVMGCCDIR |
| 392 | <dd> |
| 393 | This is the where the LLVM GCC Front End is installed. |
| 394 | <p> |
| 395 | For the pre-built GCC front end binaries, the LLVMGCCDIR is |
| 396 | <tt>cfrontend/<i>platform</i>/llvm-gcc</tt>. |
| 397 | </dl> |
| 398 | |
| 399 | </div> |
| 400 | |
| 401 | <!-- ======================================================================= --> |
| 402 | <div class="doc_subsection"> |
| 403 | <a name="environment">Setting Up Your Environment</a> |
| 404 | </div> |
| 405 | |
| 406 | <div class="doc_text"> |
| 407 | |
| 408 | <p> |
| 409 | In order to compile and use LLVM, you will need to set some environment |
| 410 | variables. There are also some shell aliases which you may find useful. |
| 411 | You can set these on the command line, or better yet, set them in your |
| 412 | <tt>.cshrc</tt> or <tt>.profile</tt>. |
| 413 | |
Misha Brukman | 54111c4 | 2004-01-20 00:20:17 +0000 | [diff] [blame] | 414 | <dl> |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 415 | <dt><tt>LLVM_LIB_SEARCH_PATH</tt>=<tt><i>LLVMGCCDIR</i>/bytecode-libs</tt> |
| 416 | <dd> |
| 417 | This environment variable helps the LLVM GCC front end find bytecode |
| 418 | libraries that it will need for compilation. |
| 419 | <p> |
| 420 | |
| 421 | <dt>alias llvmgcc <i>LLVMGCCDIR</i><tt>/bin/gcc</tt> |
| 422 | <dt>alias llvmg++ <i>LLVMGCCDIR</i><tt>/bin/g++</tt> |
| 423 | <dd> |
| 424 | This alias allows you to use the LLVM C and C++ front ends without putting |
| 425 | them in your <tt>PATH</tt> or typing in their complete pathnames. |
| 426 | </dl> |
| 427 | |
| 428 | </div> |
| 429 | |
| 430 | <!-- ======================================================================= --> |
| 431 | <div class="doc_subsection"> |
Misha Brukman | 54111c4 | 2004-01-20 00:20:17 +0000 | [diff] [blame] | 432 | <a name="unpack">Unpacking the LLVM Archives</a> |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 433 | </div> |
| 434 | |
| 435 | <div class="doc_text"> |
| 436 | |
| 437 | <p> |
| 438 | If you have the LLVM distribution, you will need to unpack it before you |
John Criswell | d000e1d | 2003-12-18 16:43:17 +0000 | [diff] [blame] | 439 | can begin to compile it. LLVM is distributed as a set of two files: the LLVM |
| 440 | suite and the LLVM GCC front end compiled for your platform. Each |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 441 | file is a TAR archive that is compressed with the gzip program. |
| 442 | </p> |
| 443 | |
John Criswell | d000e1d | 2003-12-18 16:43:17 +0000 | [diff] [blame] | 444 | <p> The files are as follows: |
Misha Brukman | 54111c4 | 2004-01-20 00:20:17 +0000 | [diff] [blame] | 445 | <dl> |
John Criswell | 18b7464 | 2004-08-16 14:51:33 +0000 | [diff] [blame] | 446 | <dt>llvm-1.3.tar.gz |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 447 | <dd>This is the source code to the LLVM suite. |
| 448 | <p> |
| 449 | |
John Criswell | 18b7464 | 2004-08-16 14:51:33 +0000 | [diff] [blame] | 450 | <dt>cfrontend-1.3.sparc-sun-solaris2.8.tar.gz |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 451 | <dd>This is the binary release of the GCC front end for Solaris/Sparc. |
| 452 | <p> |
| 453 | |
John Criswell | 18b7464 | 2004-08-16 14:51:33 +0000 | [diff] [blame] | 454 | <dt>cfrontend-1.3.i686-redhat-linux-gnu.tar.gz |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 455 | <dd>This is the binary release of the GCC front end for Linux/x86. |
John Criswell | d000e1d | 2003-12-18 16:43:17 +0000 | [diff] [blame] | 456 | <p> |
| 457 | |
John Criswell | 18b7464 | 2004-08-16 14:51:33 +0000 | [diff] [blame] | 458 | <dt>cfrontend-1.3.i386-unknown-freebsd5.1.tar.gz |
John Criswell | d000e1d | 2003-12-18 16:43:17 +0000 | [diff] [blame] | 459 | <dd>This is the binary release of the GCC front end for FreeBSD/x86. |
| 460 | <p> |
| 461 | |
John Criswell | 18b7464 | 2004-08-16 14:51:33 +0000 | [diff] [blame] | 462 | <dt>cfrontend-1.3.powerpc-apple-darwin7.0.0.tar.gz |
John Criswell | d000e1d | 2003-12-18 16:43:17 +0000 | [diff] [blame] | 463 | <dd>This is the binary release of the GCC front end for MacOS X/PPC. |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 464 | </dl> |
| 465 | |
| 466 | </div> |
| 467 | |
| 468 | <!-- ======================================================================= --> |
| 469 | <div class="doc_subsection"> |
Misha Brukman | 54111c4 | 2004-01-20 00:20:17 +0000 | [diff] [blame] | 470 | <a name="checkout">Checkout LLVM from CVS</a> |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 471 | </div> |
| 472 | |
| 473 | <div class="doc_text"> |
| 474 | |
| 475 | <p>If you have access to our CVS repository, you can get a fresh copy of |
| 476 | the entire source code. All you need to do is check it out from CVS as |
| 477 | follows:</p> |
| 478 | |
| 479 | <ul> |
| 480 | <li><tt>cd <i>where-you-want-llvm-to-live</i></tt> |
| 481 | <li><tt>cvs -d :pserver:anon@llvm-cvs.cs.uiuc.edu:/var/cvs/llvm login</tt> |
| 482 | <li>Hit the return key when prompted for the password. |
| 483 | <li><tt>cvs -z3 -d :pserver:anon@llvm-cvs.cs.uiuc.edu:/var/cvs/llvm co |
| 484 | llvm</tt> |
| 485 | </ul> |
| 486 | |
| 487 | <p>This will create an '<tt>llvm</tt>' directory in the current |
| 488 | directory and fully populate it with the LLVM source code, Makefiles, |
| 489 | test directories, and local copies of documentation files.</p> |
| 490 | |
Misha Brukman | 54111c4 | 2004-01-20 00:20:17 +0000 | [diff] [blame] | 491 | <p>If you want to get a specific release (as opposed to the most recent |
| 492 | revision), you can specify a label. The following releases have the following |
| 493 | label:</p> |
| 494 | |
John Criswell | d000e1d | 2003-12-18 16:43:17 +0000 | [diff] [blame] | 495 | <ul> |
John Criswell | 18b7464 | 2004-08-16 14:51:33 +0000 | [diff] [blame] | 496 | <li>Release 1.3: <b>RELEASE_13</b></li> |
Misha Brukman | b9be2bf | 2004-05-12 19:25:59 +0000 | [diff] [blame] | 497 | <li>Release 1.2: <b>RELEASE_12</b></li> |
| 498 | <li>Release 1.1: <b>RELEASE_11</b></li> |
| 499 | <li>Release 1.0: <b>RELEASE_1</b></li> |
John Criswell | d000e1d | 2003-12-18 16:43:17 +0000 | [diff] [blame] | 500 | </ul> |
John Criswell | d000e1d | 2003-12-18 16:43:17 +0000 | [diff] [blame] | 501 | |
Misha Brukman | b9be2bf | 2004-05-12 19:25:59 +0000 | [diff] [blame] | 502 | <p>If you would like to get the GCC front end source code, you can also get it |
| 503 | from the CVS repository:</p> |
| 504 | |
Chris Lattner | 604fdc1 | 2004-06-28 17:14:01 +0000 | [diff] [blame] | 505 | <pre> |
| 506 | cvs -z3 -d :pserver:anon@llvm-cvs.cs.uiuc.edu:/var/cvs/llvm co llvm-gcc |
Misha Brukman | b9be2bf | 2004-05-12 19:25:59 +0000 | [diff] [blame] | 507 | </pre> |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 508 | |
Chris Lattner | 604fdc1 | 2004-06-28 17:14:01 +0000 | [diff] [blame] | 509 | <p>Please note that you must follow <a href="CFEBuildInstrs.html">these |
| 510 | instructions</a> to successfully build the LLVM C front-end.</p> |
| 511 | |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 512 | </div> |
| 513 | |
| 514 | <!-- ======================================================================= --> |
Chris Lattner | 883bcbe | 2004-06-18 20:15:58 +0000 | [diff] [blame] | 515 | <div class="doc_subsubsection"> |
| 516 | <a name="mirrors">LLVM CVS Mirrors</a> |
| 517 | </div> |
| 518 | |
| 519 | <div class="doc_text"> |
| 520 | |
| 521 | <p>If the main CVS server is overloaded or inaccessible, you can try one of |
| 522 | these user-hosted mirrors:</p> |
| 523 | |
| 524 | <ul> |
Misha Brukman | b3707ba | 2004-06-18 20:18:31 +0000 | [diff] [blame] | 525 | <li><a href="http://llvm.x10sys.com/">Mirror hosted by eXtensible Systems |
| 526 | Inc.</a></li> |
Chris Lattner | 883bcbe | 2004-06-18 20:15:58 +0000 | [diff] [blame] | 527 | </ul> |
| 528 | </div> |
| 529 | |
| 530 | <!-- ======================================================================= --> |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 531 | <div class="doc_subsection"> |
Misha Brukman | 54111c4 | 2004-01-20 00:20:17 +0000 | [diff] [blame] | 532 | <a name="installcf">Install the GCC Front End</a> |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 533 | </div> |
| 534 | |
| 535 | <div class="doc_text"> |
| 536 | |
| 537 | <p>Before configuring and compiling the LLVM suite, you need to extract the LLVM |
| 538 | GCC front end from the binary distribution. It is used for building the |
| 539 | bytecode libraries later used by the GCC front end for linking programs, and its |
| 540 | location must be specified when the LLVM suite is configured.</p> |
| 541 | |
| 542 | <p>To install the GCC front end, do the following:</p> |
| 543 | |
| 544 | <ol> |
| 545 | <li><tt>cd <i>where-you-want-the-front-end-to-live</i></tt></li> |
John Criswell | d000e1d | 2003-12-18 16:43:17 +0000 | [diff] [blame] | 546 | <li><tt>gunzip --stdout cfrontend-<i>version</i>.<i>platform</i>.tar.gz | tar -xvf |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 547 | -</tt></li> |
| 548 | </ol> |
| 549 | |
John Criswell | d000e1d | 2003-12-18 16:43:17 +0000 | [diff] [blame] | 550 | <p>If you are using Solaris/Sparc or MacOS X/PPC, you will need to fix the |
| 551 | header files:</p> |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 552 | |
John Criswell | 364cec4 | 2004-03-12 20:31:37 +0000 | [diff] [blame] | 553 | <p><tt>cd cfrontend/<i>platform</i><br> |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 554 | ./fixheaders</tt></p> |
| 555 | |
| 556 | <p>The binary versions of the GCC front end may not suit all of your needs. For |
| 557 | example, the binary distribution may include an old version of a system header |
| 558 | file, not "fix" a header file that needs to be fixed for GCC, or it may be |
| 559 | linked with libraries not available on your system.</p> |
| 560 | |
| 561 | <p>In cases like these, you may want to try <a |
| 562 | href="CFEBuildInstrs.html">building the GCC front end from source.</a> This is |
| 563 | not for the faint of heart, so be forewarned.</p> |
| 564 | |
| 565 | </div> |
| 566 | |
| 567 | <!-- ======================================================================= --> |
| 568 | <div class="doc_subsection"> |
| 569 | <a name="config">Local LLVM Configuration</a> |
| 570 | </div> |
| 571 | |
| 572 | <div class="doc_text"> |
| 573 | |
| 574 | <p>Once checked out from the CVS repository, the LLVM suite source code must be |
| 575 | configured via the <tt>configure</tt> script. This script sets variables in |
| 576 | <tt>llvm/Makefile.config</tt> and <tt>llvm/include/Config/config.h</tt>. It |
John Criswell | d000e1d | 2003-12-18 16:43:17 +0000 | [diff] [blame] | 577 | also populates <i>OBJ_ROOT</i> with the Makefiles needed to begin building |
| 578 | LLVM.</p> |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 579 | |
| 580 | <p>The following environment variables are used by the <tt>configure</tt> |
| 581 | script to configure the build system:</p> |
| 582 | |
| 583 | <table border=1> |
| 584 | <tr> |
| 585 | <th>Variable</th> |
| 586 | <th>Purpose</th> |
| 587 | </tr> |
| 588 | |
| 589 | <tr> |
| 590 | <td>CC</td> |
| 591 | <td>Tells <tt>configure</tt> which C compiler to use. By default, |
| 592 | <tt>configure</tt> will look for the first GCC C compiler in |
| 593 | <tt>PATH</tt>. Use this variable to override |
| 594 | <tt>configure</tt>'s default behavior.</td> |
| 595 | </tr> |
| 596 | |
| 597 | <tr> |
| 598 | <td>CXX</td> |
| 599 | <td>Tells <tt>configure</tt> which C++ compiler to use. By default, |
| 600 | <tt>configure</tt> will look for the first GCC C++ compiler in |
| 601 | <tt>PATH</tt>. Use this variable to override |
| 602 | <tt>configure</tt>'s default behavior.</td> |
| 603 | </tr> |
| 604 | </table> |
| 605 | |
| 606 | <p>The following options can be used to set or enable LLVM specific options:</p> |
| 607 | |
Misha Brukman | 54111c4 | 2004-01-20 00:20:17 +0000 | [diff] [blame] | 608 | <dl> |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 609 | <dt><i>--with-llvmgccdir=LLVMGCCDIR</i> |
| 610 | <dd> |
John Criswell | 364cec4 | 2004-03-12 20:31:37 +0000 | [diff] [blame] | 611 | Path to the location where the LLVM GCC front end binaries and |
John Criswell | d000e1d | 2003-12-18 16:43:17 +0000 | [diff] [blame] | 612 | associated libraries were installed. This must be specified as an |
| 613 | absolute pathname. |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 614 | <p> |
| 615 | <dt><i>--enable-optimized</i> |
| 616 | <dd> |
| 617 | Enables optimized compilation by default (debugging symbols are removed |
| 618 | and GCC optimization flags are enabled). The default is to use an |
| 619 | unoptimized build (also known as a debug build). |
| 620 | <p> |
| 621 | <dt><i>--enable-jit</i> |
| 622 | <dd> |
John Criswell | d000e1d | 2003-12-18 16:43:17 +0000 | [diff] [blame] | 623 | Compile the Just In Time (JIT) compiler functionality. This is not |
| 624 | available |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 625 | on all platforms. The default is dependent on platform, so it is best |
| 626 | to explicitly enable it if you want it. |
| 627 | <p> |
| 628 | <dt><i>--enable-spec2000</i> |
| 629 | <dt><i>--enable-spec2000=<<tt>directory</tt>></i> |
| 630 | <dd> |
| 631 | Enable the use of SPEC2000 when testing LLVM. This is disabled by default |
| 632 | (unless <tt>configure</tt> finds SPEC2000 installed). By specifying |
| 633 | <tt>directory</tt>, you can tell configure where to find the SPEC2000 |
| 634 | benchmarks. If <tt>directory</tt> is left unspecified, <tt>configure</tt> |
| 635 | uses the default value |
| 636 | <tt>/home/vadve/shared/benchmarks/speccpu2000/benchspec</tt>. |
John Criswell | 364cec4 | 2004-03-12 20:31:37 +0000 | [diff] [blame] | 637 | <p> |
| 638 | <dt><i>--enable-spec95</i> |
| 639 | <dt><i>--enable-spec95=<<tt>directory</tt>></i> |
| 640 | <dd> |
| 641 | Enable the use of SPEC95 when testing LLVM. It is similar to the |
| 642 | <i>--enable-spec2000</i> option. |
| 643 | <p> |
| 644 | <dt><i>--enable-povray</i> |
| 645 | <dt><i>--enable-povray=<<tt>directory</tt>></i> |
| 646 | <dd> |
| 647 | Enable the use of Povray as an external test. Versions of Povray written |
| 648 | in C should work. This option is similar to the <i>--enable-spec2000</i> |
| 649 | option. |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 650 | </dl> |
| 651 | |
| 652 | <p>To configure LLVM, follow these steps:</p> |
| 653 | |
| 654 | <ol> |
| 655 | <li>Change directory into the object root directory: |
John Criswell | 0f6d7c0 | 2003-10-27 18:18:16 +0000 | [diff] [blame] | 656 | <br> |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 657 | <tt>cd <i>OBJ_ROOT</i></tt> |
John Criswell | 0f6d7c0 | 2003-10-27 18:18:16 +0000 | [diff] [blame] | 658 | <p> |
John Criswell | 0f6d7c0 | 2003-10-27 18:18:16 +0000 | [diff] [blame] | 659 | |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 660 | <li>Run the <tt>configure</tt> script located in the LLVM source tree: |
| 661 | <br> |
| 662 | <tt><i>SRC_ROOT</i>/configure</tt> |
John Criswell | 0f6d7c0 | 2003-10-27 18:18:16 +0000 | [diff] [blame] | 663 | <p> |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 664 | </ol> |
John Criswell | 85ed361 | 2003-06-12 19:34:44 +0000 | [diff] [blame] | 665 | |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 666 | <p>In addition to running <tt>configure</tt>, you must set the |
| 667 | <tt>LLVM_LIB_SEARCH_PATH</tt> environment variable in your startup scripts. |
| 668 | This environment variable is used to locate "system" libraries like |
| 669 | "<tt>-lc</tt>" and "<tt>-lm</tt>" when linking. This variable should be set to |
John Criswell | d000e1d | 2003-12-18 16:43:17 +0000 | [diff] [blame] | 670 | the absolute path of the <tt>bytecode-libs</tt> subdirectory of the GCC front |
| 671 | end, or <i>LLVMGCCDIR</i>/<tt>bytecode-libs</tt>. For example, one might set |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 672 | <tt>LLVM_LIB_SEARCH_PATH</tt> to |
John Criswell | d000e1d | 2003-12-18 16:43:17 +0000 | [diff] [blame] | 673 | <tt>/home/vadve/lattner/local/x86/llvm-gcc/bytecode-libs</tt> for the x86 |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 674 | version of the GCC front end on our research machines.</p> |
John Criswell | 7a73b80 | 2003-06-30 21:59:07 +0000 | [diff] [blame] | 675 | |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 676 | </div> |
John Criswell | 85ed361 | 2003-06-12 19:34:44 +0000 | [diff] [blame] | 677 | |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 678 | <!-- ======================================================================= --> |
| 679 | <div class="doc_subsection"> |
| 680 | <a name="compile">Compiling the LLVM Suite Source Code</a> |
| 681 | </div> |
John Criswell | 85ed361 | 2003-06-12 19:34:44 +0000 | [diff] [blame] | 682 | |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 683 | <div class="doc_text"> |
John Criswell | 0b45920 | 2003-07-08 20:35:59 +0000 | [diff] [blame] | 684 | |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 685 | <p>Once you have configured LLVM, you can build it. There are three types of |
| 686 | builds:</p> |
John Criswell | 0b45920 | 2003-07-08 20:35:59 +0000 | [diff] [blame] | 687 | |
Misha Brukman | 54111c4 | 2004-01-20 00:20:17 +0000 | [diff] [blame] | 688 | <dl> |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 689 | <dt>Debug Builds |
John Criswell | ce760f6 | 2003-07-03 16:01:38 +0000 | [diff] [blame] | 690 | <dd> |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 691 | These builds are the default when one types <tt>gmake</tt> (unless the |
| 692 | <tt>--enable-optimized</tt> option was used during configuration). The |
| 693 | build system will compile the tools and libraries with debugging |
| 694 | information. |
| 695 | <p> |
| 696 | |
| 697 | <dt>Release (Optimized) Builds |
John Criswell | ce760f6 | 2003-07-03 16:01:38 +0000 | [diff] [blame] | 698 | <dd> |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 699 | These builds are enabled with the <tt>--enable-optimized</tt> option to |
| 700 | <tt>configure</tt> or by specifying <tt>ENABLE_OPTIMIZED=1</tt> on the |
| 701 | <tt>gmake</tt> command line. For these builds, the build system will |
| 702 | compile the tools and libraries with GCC optimizations enabled and strip |
| 703 | debugging information from the libraries and executables it generates. |
| 704 | <p> |
| 705 | |
| 706 | <dt>Profile Builds |
John Criswell | ce760f6 | 2003-07-03 16:01:38 +0000 | [diff] [blame] | 707 | <dd> |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 708 | These builds are for use with profiling. They compile profiling |
| 709 | information into the code for use with programs like <tt>gprof</tt>. |
| 710 | Profile builds must be started by specifying <tt>ENABLE_PROFILING=1</tt> |
| 711 | on the <tt>gmake</tt> command line. |
| 712 | </dl> |
John Criswell | 7a73b80 | 2003-06-30 21:59:07 +0000 | [diff] [blame] | 713 | |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 714 | <p>Once you have LLVM configured, you can build it by entering the |
| 715 | <i>OBJ_ROOT</i> directory and issuing the following command:</p> |
John Criswell | 20d2d3e | 2003-10-10 14:26:14 +0000 | [diff] [blame] | 716 | |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 717 | <p><tt>gmake</tt></p> |
John Criswell | 20d2d3e | 2003-10-10 14:26:14 +0000 | [diff] [blame] | 718 | |
Chris Lattner | 95e9258 | 2004-07-18 22:32:22 +0000 | [diff] [blame] | 719 | <p>If the build fails, please <a href="#brokengcc">check here</a> to see if you |
| 720 | are using a known broken version of GCC to compile LLVM with.</p> |
| 721 | |
| 722 | <p> |
| 723 | If you have multiple processors in your machine, you may wish to use some of |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 724 | the parallel build options provided by GNU Make. For example, you could use the |
| 725 | command:</p> |
John Criswell | 85ed361 | 2003-06-12 19:34:44 +0000 | [diff] [blame] | 726 | |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 727 | <p><tt>gmake -j2</tt></p> |
John Criswell | ce760f6 | 2003-07-03 16:01:38 +0000 | [diff] [blame] | 728 | |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 729 | <p>There are several special targets which are useful when working with the LLVM |
| 730 | source code:</p> |
John Criswell | ce760f6 | 2003-07-03 16:01:38 +0000 | [diff] [blame] | 731 | |
Misha Brukman | 54111c4 | 2004-01-20 00:20:17 +0000 | [diff] [blame] | 732 | <dl> |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 733 | <dt><tt>gmake clean</tt> |
| 734 | <dd> |
| 735 | Removes all files generated by the build. This includes object files, |
| 736 | generated C/C++ files, libraries, and executables. |
| 737 | <p> |
John Criswell | ce760f6 | 2003-07-03 16:01:38 +0000 | [diff] [blame] | 738 | |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 739 | <dt><tt>gmake distclean</tt> |
| 740 | <dd> |
Misha Brukman | ad38e96 | 2004-08-21 23:40:49 +0000 | [diff] [blame] | 741 | Removes everything that <tt>gmake clean</tt> does, but also removes files |
| 742 | generated by <tt>configure</tt>. It attempts to return the source tree to the |
| 743 | original state in which it was shipped. |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 744 | <p> |
John Criswell | ce760f6 | 2003-07-03 16:01:38 +0000 | [diff] [blame] | 745 | |
Misha Brukman | e51c356 | 2004-08-23 20:25:33 +0000 | [diff] [blame^] | 746 | <dt><tt>gmake install</tt> |
| 747 | <dd> |
| 748 | Installs LLVM libraries and tools in a heirarchy under $PREFIX, specified with |
| 749 | <tt>./configure --prefix=[dir]</tt>, defaults to <tt>/usr/local</tt>. |
| 750 | <p> |
| 751 | |
Misha Brukman | ad38e96 | 2004-08-21 23:40:49 +0000 | [diff] [blame] | 752 | <dt><tt>gmake install-bytecode</tt> |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 753 | <dd> |
Misha Brukman | ad38e96 | 2004-08-21 23:40:49 +0000 | [diff] [blame] | 754 | Assuming you built LLVM into $OBJDIR, when this command is run in |
| 755 | $OBJDIR/runtime, it will install bytecode libraries into the GCC front end's |
| 756 | bytecode library directory. If you need to update your bytecode libraries, |
| 757 | this is the target to use once you've built them. |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 758 | <p> |
| 759 | </dl> |
John Criswell | ce760f6 | 2003-07-03 16:01:38 +0000 | [diff] [blame] | 760 | |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 761 | <p>It is also possible to override default values from <tt>configure</tt> by |
| 762 | declaring variables on the command line. The following are some examples:</p> |
John Criswell | ce760f6 | 2003-07-03 16:01:38 +0000 | [diff] [blame] | 763 | |
Misha Brukman | 54111c4 | 2004-01-20 00:20:17 +0000 | [diff] [blame] | 764 | <dl> |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 765 | <dt><tt>gmake ENABLE_OPTIMIZED=1</tt> |
| 766 | <dd> |
| 767 | Perform a Release (Optimized) build. |
| 768 | <p> |
John Criswell | ce760f6 | 2003-07-03 16:01:38 +0000 | [diff] [blame] | 769 | |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 770 | <dt><tt>gmake ENABLE_PROFILING=1</tt> |
| 771 | <dd> |
| 772 | Perform a Profiling build. |
| 773 | <p> |
John Criswell | ce760f6 | 2003-07-03 16:01:38 +0000 | [diff] [blame] | 774 | |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 775 | <dt><tt>gmake VERBOSE=1</tt> |
| 776 | <dd> |
| 777 | Print what <tt>gmake</tt> is doing on standard output. |
| 778 | <p> |
| 779 | </dl> |
John Criswell | ce760f6 | 2003-07-03 16:01:38 +0000 | [diff] [blame] | 780 | |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 781 | <p>Every directory in the LLVM object tree includes a <tt>Makefile</tt> to build |
| 782 | it and any subdirectories that it contains. Entering any directory inside the |
| 783 | LLVM object tree and typing <tt>gmake</tt> should rebuild anything in or below |
| 784 | that directory that is out of date.</p> |
John Criswell | ce760f6 | 2003-07-03 16:01:38 +0000 | [diff] [blame] | 785 | |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 786 | </div> |
John Criswell | 20d2d3e | 2003-10-10 14:26:14 +0000 | [diff] [blame] | 787 | |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 788 | <!-- ======================================================================= --> |
| 789 | <div class="doc_subsection"> |
| 790 | <a name="objfiles">The Location of LLVM Object Files</a> |
| 791 | </div> |
John Criswell | 20d2d3e | 2003-10-10 14:26:14 +0000 | [diff] [blame] | 792 | |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 793 | <div class="doc_text"> |
John Criswell | ce760f6 | 2003-07-03 16:01:38 +0000 | [diff] [blame] | 794 | |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 795 | <p>The LLVM build system is capable of sharing a single LLVM source tree among |
| 796 | several LLVM builds. Hence, it is possible to build LLVM for several different |
| 797 | platforms or configurations using the same source tree.</p> |
John Criswell | ce760f6 | 2003-07-03 16:01:38 +0000 | [diff] [blame] | 798 | |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 799 | <p>This is accomplished in the typical autoconf manner:</p> |
John Criswell | ce760f6 | 2003-07-03 16:01:38 +0000 | [diff] [blame] | 800 | |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 801 | <ul> |
| 802 | <li><p>Change directory to where the LLVM object files should live:</p> |
John Criswell | ce760f6 | 2003-07-03 16:01:38 +0000 | [diff] [blame] | 803 | |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 804 | <p><tt>cd <i>OBJ_ROOT</i></tt></p></li> |
John Criswell | ce760f6 | 2003-07-03 16:01:38 +0000 | [diff] [blame] | 805 | |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 806 | <li><p>Run the <tt>configure</tt> script found in the LLVM source |
| 807 | directory:</p> |
John Criswell | ce760f6 | 2003-07-03 16:01:38 +0000 | [diff] [blame] | 808 | |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 809 | <p><tt><i>SRC_ROOT</i>/configure</tt></p></li> |
| 810 | </ul> |
John Criswell | 85ed361 | 2003-06-12 19:34:44 +0000 | [diff] [blame] | 811 | |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 812 | <p>The LLVM build will place files underneath <i>OBJ_ROOT</i> in directories |
| 813 | named after the build type:</p> |
John Criswell | 85ed361 | 2003-06-12 19:34:44 +0000 | [diff] [blame] | 814 | |
Misha Brukman | 54111c4 | 2004-01-20 00:20:17 +0000 | [diff] [blame] | 815 | <dl> |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 816 | <dt>Debug Builds |
| 817 | <dd> |
Misha Brukman | 54111c4 | 2004-01-20 00:20:17 +0000 | [diff] [blame] | 818 | <dl> |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 819 | <dt>Tools |
| 820 | <dd><tt><i>OBJ_ROOT</i>/tools/Debug</tt> |
| 821 | <dt>Libraries |
| 822 | <dd><tt><i>OBJ_ROOT</i>/lib/Debug</tt> |
| 823 | </dl> |
| 824 | <p> |
John Criswell | 85ed361 | 2003-06-12 19:34:44 +0000 | [diff] [blame] | 825 | |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 826 | <dt>Release Builds |
| 827 | <dd> |
Misha Brukman | 54111c4 | 2004-01-20 00:20:17 +0000 | [diff] [blame] | 828 | <dl> |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 829 | <dt>Tools |
| 830 | <dd><tt><i>OBJ_ROOT</i>/tools/Release</tt> |
| 831 | <dt>Libraries |
| 832 | <dd><tt><i>OBJ_ROOT</i>/lib/Release</tt> |
| 833 | </dl> |
| 834 | <p> |
John Criswell | 85ed361 | 2003-06-12 19:34:44 +0000 | [diff] [blame] | 835 | |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 836 | <dt>Profile Builds |
| 837 | <dd> |
Misha Brukman | 54111c4 | 2004-01-20 00:20:17 +0000 | [diff] [blame] | 838 | <dl> |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 839 | <dt>Tools |
| 840 | <dd><tt><i>OBJ_ROOT</i>/tools/Profile</tt> |
| 841 | <dt>Libraries |
| 842 | <dd><tt><i>OBJ_ROOT</i>/lib/Profile</tt> |
| 843 | </dl> |
| 844 | </dl> |
John Criswell | 85ed361 | 2003-06-12 19:34:44 +0000 | [diff] [blame] | 845 | |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 846 | </div> |
Chris Lattner | 7fe7f81 | 2002-07-24 19:51:14 +0000 | [diff] [blame] | 847 | |
Chris Lattner | a553f62 | 2004-03-25 20:38:40 +0000 | [diff] [blame] | 848 | <!-- ======================================================================= --> |
| 849 | <div class="doc_subsection"> |
| 850 | <a name="optionalconfig">Optional Configuration Items</a> |
| 851 | </div> |
| 852 | |
| 853 | <div class="doc_text"> |
| 854 | |
| 855 | <p> |
| 856 | If you're running on a linux system that supports the "<a |
| 857 | href="http://www.tat.physik.uni-tuebingen.de/~rguenth/linux/binfmt_misc.html">binfmt_misc</a>" |
| 858 | module, and you have root access on the system, you can set your system up to |
| 859 | execute LLVM bytecode files directly. To do this, use commands like this (the |
| 860 | first command may not be required if you are already using the module):</p> |
| 861 | |
| 862 | <pre> |
| 863 | $ mount -t binfmt_misc none /proc/sys/fs/binfmt_misc |
| 864 | $ echo ':llvm:M::llvm::/path/to/lli:' > /proc/sys/fs/binfmt_misc/register |
| 865 | $ chmod u+x hello.bc (if needed) |
| 866 | $ ./hello.bc |
| 867 | </pre> |
| 868 | |
| 869 | <p> |
| 870 | This allows you to execute LLVM bytecode files directly. Thanks to Jack |
| 871 | Cummings for pointing this out! |
| 872 | </p> |
| 873 | |
| 874 | </div> |
| 875 | |
| 876 | |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 877 | <!-- *********************************************************************** --> |
| 878 | <div class="doc_section"> |
| 879 | <a name="layout"><b>Program Layout</b></a> |
| 880 | </div> |
| 881 | <!-- *********************************************************************** --> |
John Criswell | 85ed361 | 2003-06-12 19:34:44 +0000 | [diff] [blame] | 882 | |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 883 | <div class="doc_text"> |
John Criswell | 85ed361 | 2003-06-12 19:34:44 +0000 | [diff] [blame] | 884 | |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 885 | <p>One useful source of information about the LLVM source base is the LLVM <a |
John Criswell | 364cec4 | 2004-03-12 20:31:37 +0000 | [diff] [blame] | 886 | href="http://www.doxygen.org">doxygen</a> documentation available at <tt><a |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 887 | href="http://llvm.cs.uiuc.edu/doxygen/">http://llvm.cs.uiuc.edu/doxygen/</a></tt>. |
| 888 | The following is a brief introduction to code layout:</p> |
John Criswell | 85ed361 | 2003-06-12 19:34:44 +0000 | [diff] [blame] | 889 | |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 890 | </div> |
John Criswell | 85ed361 | 2003-06-12 19:34:44 +0000 | [diff] [blame] | 891 | |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 892 | <!-- ======================================================================= --> |
| 893 | <div class="doc_subsection"> |
| 894 | <a name="cvsdir"><tt>CVS</tt> directories</a> |
| 895 | </div> |
John Criswell | 85ed361 | 2003-06-12 19:34:44 +0000 | [diff] [blame] | 896 | |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 897 | <div class="doc_text"> |
John Criswell | 85ed361 | 2003-06-12 19:34:44 +0000 | [diff] [blame] | 898 | |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 899 | <p>Every directory checked out of CVS will contain a <tt>CVS</tt> directory; for |
| 900 | the most part these can just be ignored.</p> |
John Criswell | 85ed361 | 2003-06-12 19:34:44 +0000 | [diff] [blame] | 901 | |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 902 | </div> |
John Criswell | 85ed361 | 2003-06-12 19:34:44 +0000 | [diff] [blame] | 903 | |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 904 | <!-- ======================================================================= --> |
| 905 | <div class="doc_subsection"> |
| 906 | <a name="include"><tt>llvm/include</tt></a> |
| 907 | </div> |
| 908 | |
| 909 | <div class="doc_text"> |
| 910 | |
| 911 | <p>This directory contains public header files exported from the LLVM |
| 912 | library. The three main subdirectories of this directory are:</p> |
| 913 | |
| 914 | <ol> |
| 915 | <li><tt>llvm/include/llvm</tt> - This directory contains all of the LLVM |
| 916 | specific header files. This directory also has subdirectories for |
| 917 | different portions of LLVM: <tt>Analysis</tt>, <tt>CodeGen</tt>, |
| 918 | <tt>Target</tt>, <tt>Transforms</tt>, etc...</li> |
| 919 | |
| 920 | <li><tt>llvm/include/Support</tt> - This directory contains generic |
| 921 | support libraries that are independent of LLVM, but are used by LLVM. |
| 922 | For example, some C++ STL utilities and a Command Line option processing |
| 923 | library store their header files here.</li> |
| 924 | |
| 925 | <li><tt>llvm/include/Config</tt> - This directory contains header files |
| 926 | configured by the <tt>configure</tt> script. They wrap "standard" UNIX |
| 927 | and C header files. Source code can include these header files which |
| 928 | automatically take care of the conditional #includes that the |
| 929 | <tt>configure</tt> script generates.</li> |
| 930 | </ol> |
| 931 | |
| 932 | </div> |
| 933 | |
| 934 | <!-- ======================================================================= --> |
| 935 | <div class="doc_subsection"> |
| 936 | <a name="lib"><tt>llvm/lib</tt></a> |
| 937 | </div> |
| 938 | |
| 939 | <div class="doc_text"> |
| 940 | |
| 941 | <p>This directory contains most of the source files of the LLVM system. In LLVM, |
| 942 | almost all code exists in libraries, making it very easy to share code among the |
| 943 | different <a href="#tools">tools</a>.</p> |
| 944 | |
Misha Brukman | 54111c4 | 2004-01-20 00:20:17 +0000 | [diff] [blame] | 945 | <dl> |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 946 | <dt><tt>llvm/lib/VMCore/</tt><dd> This directory holds the core LLVM |
| 947 | source files that implement core classes like Instruction and BasicBlock. |
| 948 | |
| 949 | <dt><tt>llvm/lib/AsmParser/</tt><dd> This directory holds the source code |
| 950 | for the LLVM assembly language parser library. |
| 951 | |
| 952 | <dt><tt>llvm/lib/ByteCode/</tt><dd> This directory holds code for reading |
| 953 | and write LLVM bytecode. |
| 954 | |
| 955 | <dt><tt>llvm/lib/CWriter/</tt><dd> This directory implements the LLVM to C |
| 956 | converter. |
| 957 | |
| 958 | <dt><tt>llvm/lib/Analysis/</tt><dd> This directory contains a variety of |
| 959 | different program analyses, such as Dominator Information, Call Graphs, |
| 960 | Induction Variables, Interval Identification, Natural Loop Identification, |
| 961 | etc... |
| 962 | |
| 963 | <dt><tt>llvm/lib/Transforms/</tt><dd> This directory contains the source |
| 964 | code for the LLVM to LLVM program transformations, such as Aggressive Dead |
| 965 | Code Elimination, Sparse Conditional Constant Propagation, Inlining, Loop |
| 966 | Invariant Code Motion, Dead Global Elimination, and many others... |
| 967 | |
| 968 | <dt><tt>llvm/lib/Target/</tt><dd> This directory contains files that |
| 969 | describe various target architectures for code generation. For example, |
John Criswell | d179961 | 2004-03-29 20:23:11 +0000 | [diff] [blame] | 970 | the llvm/lib/Target/SparcV9 directory holds the Sparc machine |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 971 | description.<br> |
| 972 | |
| 973 | <dt><tt>llvm/lib/CodeGen/</tt><dd> This directory contains the major parts |
| 974 | of the code generator: Instruction Selector, Instruction Scheduling, and |
| 975 | Register Allocation. |
John Criswell | 85ed361 | 2003-06-12 19:34:44 +0000 | [diff] [blame] | 976 | |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 977 | <dt><tt>llvm/lib/Support/</tt><dd> This directory contains the source code |
| 978 | that corresponds to the header files located in |
| 979 | <tt>llvm/include/Support/</tt>. |
| 980 | </dl> |
John Criswell | 7a73b80 | 2003-06-30 21:59:07 +0000 | [diff] [blame] | 981 | |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 982 | </div> |
John Criswell | 85ed361 | 2003-06-12 19:34:44 +0000 | [diff] [blame] | 983 | |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 984 | <!-- ======================================================================= --> |
| 985 | <div class="doc_subsection"> |
| 986 | <a name="runtime"><tt>llvm/runtime</tt></a> |
| 987 | </div> |
John Criswell | 85ed361 | 2003-06-12 19:34:44 +0000 | [diff] [blame] | 988 | |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 989 | <div class="doc_text"> |
John Criswell | 85ed361 | 2003-06-12 19:34:44 +0000 | [diff] [blame] | 990 | |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 991 | <p>This directory contains libraries which are compiled into LLVM bytecode and |
| 992 | used when linking programs with the GCC front end. Most of these libraries are |
| 993 | skeleton versions of real libraries; for example, libc is a stripped down |
| 994 | version of glibc.</p> |
John Criswell | 85ed361 | 2003-06-12 19:34:44 +0000 | [diff] [blame] | 995 | |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 996 | <p>Unlike the rest of the LLVM suite, this directory needs the LLVM GCC front |
| 997 | end to compile.</p> |
John Criswell | 85ed361 | 2003-06-12 19:34:44 +0000 | [diff] [blame] | 998 | |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 999 | </div> |
John Criswell | 85ed361 | 2003-06-12 19:34:44 +0000 | [diff] [blame] | 1000 | |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 1001 | <!-- ======================================================================= --> |
| 1002 | <div class="doc_subsection"> |
| 1003 | <a name="test"><tt>llvm/test</tt></a> |
| 1004 | </div> |
John Criswell | 85ed361 | 2003-06-12 19:34:44 +0000 | [diff] [blame] | 1005 | |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 1006 | <div class="doc_text"> |
John Criswell | 85ed361 | 2003-06-12 19:34:44 +0000 | [diff] [blame] | 1007 | |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 1008 | <p>This directory contains regression tests and source code that is used to test |
| 1009 | the LLVM infrastructure.</p> |
John Criswell | 85ed361 | 2003-06-12 19:34:44 +0000 | [diff] [blame] | 1010 | |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 1011 | </div> |
John Criswell | 85ed361 | 2003-06-12 19:34:44 +0000 | [diff] [blame] | 1012 | |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 1013 | <!-- ======================================================================= --> |
| 1014 | <div class="doc_subsection"> |
| 1015 | <a name="tools"><tt>llvm/tools</tt></a> |
| 1016 | </div> |
John Criswell | 85ed361 | 2003-06-12 19:34:44 +0000 | [diff] [blame] | 1017 | |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 1018 | <div class="doc_text"> |
John Criswell | 20d2d3e | 2003-10-10 14:26:14 +0000 | [diff] [blame] | 1019 | |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 1020 | <p>The <b>tools</b> directory contains the executables built out of the |
| 1021 | libraries above, which form the main part of the user interface. You can |
| 1022 | always get help for a tool by typing <tt>tool_name --help</tt>. The |
John Criswell | 364cec4 | 2004-03-12 20:31:37 +0000 | [diff] [blame] | 1023 | following is a brief introduction to the most important tools:</p> |
John Criswell | 20d2d3e | 2003-10-10 14:26:14 +0000 | [diff] [blame] | 1024 | |
Misha Brukman | 54111c4 | 2004-01-20 00:20:17 +0000 | [diff] [blame] | 1025 | <dl> |
| 1026 | <dt><tt><b>analyze</b></tt> <dd><tt>analyze</tt> is used to run a specific |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 1027 | analysis on an input LLVM bytecode file and print out the results. It is |
| 1028 | primarily useful for debugging analyses, or familiarizing yourself with |
| 1029 | what an analysis does.<p> |
John Criswell | 85ed361 | 2003-06-12 19:34:44 +0000 | [diff] [blame] | 1030 | |
Misha Brukman | 54111c4 | 2004-01-20 00:20:17 +0000 | [diff] [blame] | 1031 | <dt><tt><b>bugpoint</b></tt> <dd><tt>bugpoint</tt> is used to debug |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 1032 | optimization passes or code generation backends by narrowing down the |
| 1033 | given test case to the minimum number of passes and/or instructions that |
| 1034 | still cause a problem, whether it is a crash or miscompilation. See <a |
| 1035 | href="HowToSubmitABug.html">HowToSubmitABug.html</a> for more information |
| 1036 | on using <tt>bugpoint</tt>.<p> |
John Criswell | 85ed361 | 2003-06-12 19:34:44 +0000 | [diff] [blame] | 1037 | |
Misha Brukman | 54111c4 | 2004-01-20 00:20:17 +0000 | [diff] [blame] | 1038 | <dt><tt><b>llvm-ar</b></tt> <dd>The archiver produces an archive containing |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 1039 | the given LLVM bytecode files, optionally with an index for faster |
| 1040 | lookup.<p> |
| 1041 | |
Misha Brukman | 54111c4 | 2004-01-20 00:20:17 +0000 | [diff] [blame] | 1042 | <dt><tt><b>llvm-as</b></tt> <dd>The assembler transforms the human readable |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 1043 | LLVM assembly to LLVM bytecode.<p> |
John Criswell | 85ed361 | 2003-06-12 19:34:44 +0000 | [diff] [blame] | 1044 | |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 1045 | <dt><tt><b>llvm-dis</b></tt><dd>The disassembler transforms the LLVM |
Chris Lattner | 036e639 | 2004-02-14 01:07:17 +0000 | [diff] [blame] | 1046 | bytecode to human readable LLVM assembly.<p> |
John Criswell | 85ed361 | 2003-06-12 19:34:44 +0000 | [diff] [blame] | 1047 | |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 1048 | <dt><tt><b>llvm-link</b></tt><dd> <tt>llvm-link</tt>, not surprisingly, |
| 1049 | links multiple LLVM modules into a single program.<p> |
| 1050 | |
| 1051 | <dt><tt><b>lli</b></tt><dd> <tt>lli</tt> is the LLVM interpreter, which |
| 1052 | can directly execute LLVM bytecode (although very slowly...). In addition |
| 1053 | to a simple interpreter, <tt>lli</tt> also has a tracing mode (entered by |
| 1054 | specifying <tt>-trace</tt> on the command line). Finally, for |
| 1055 | architectures that support it (currently only x86 and Sparc), by default, |
| 1056 | <tt>lli</tt> will function as a Just-In-Time compiler (if the |
| 1057 | functionality was compiled in), and will execute the code <i>much</i> |
| 1058 | faster than the interpreter.<p> |
Misha Brukman | ef0ad41 | 2003-10-06 19:23:34 +0000 | [diff] [blame] | 1059 | |
Chris Lattner | 036e639 | 2004-02-14 01:07:17 +0000 | [diff] [blame] | 1060 | <dt><tt><b>llc</b></tt><dd> <tt>llc</tt> is the LLVM backend compiler, which |
| 1061 | translates LLVM bytecode to a SPARC or x86 assembly file, or to C code (with |
| 1062 | the -march=c option).<p> |
Misha Brukman | ef0ad41 | 2003-10-06 19:23:34 +0000 | [diff] [blame] | 1063 | |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 1064 | <dt><tt><b>llvmgcc</b></tt><dd> <tt>llvmgcc</tt> is a GCC-based C frontend |
| 1065 | that has been retargeted to emit LLVM code as the machine code output. It |
| 1066 | works just like any other GCC compiler, taking the typical <tt>-c, -S, -E, |
| 1067 | -o</tt> options that are typically used. The source code for the |
| 1068 | <tt>llvmgcc</tt> tool is currently not included in the LLVM CVS tree |
| 1069 | because it is quite large and not very interesting.<p> |
Misha Brukman | ef0ad41 | 2003-10-06 19:23:34 +0000 | [diff] [blame] | 1070 | |
Misha Brukman | 54111c4 | 2004-01-20 00:20:17 +0000 | [diff] [blame] | 1071 | <blockquote> |
| 1072 | <dl> |
| 1073 | <dt><tt><b>gccas</b></tt> <dd>This tool is invoked by the |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 1074 | <tt>llvmgcc</tt> frontend as the "assembler" part of the compiler. This |
| 1075 | tool actually assembles LLVM assembly to LLVM bytecode, |
| 1076 | performs a variety of optimizations, and outputs LLVM bytecode. Thus |
| 1077 | when you invoke <tt>llvmgcc -c x.c -o x.o</tt>, you are causing |
| 1078 | <tt>gccas</tt> to be run, which writes the <tt>x.o</tt> file (which is |
| 1079 | an LLVM bytecode file that can be disassembled or manipulated just like |
| 1080 | any other bytecode file). The command line interface to <tt>gccas</tt> |
| 1081 | is designed to be as close as possible to the <b>system</b> |
| 1082 | `<tt>as</tt>' utility so that the gcc frontend itself did not have to be |
| 1083 | modified to interface to a "weird" assembler.<p> |
John Criswell | 85ed361 | 2003-06-12 19:34:44 +0000 | [diff] [blame] | 1084 | |
Misha Brukman | 54111c4 | 2004-01-20 00:20:17 +0000 | [diff] [blame] | 1085 | <dt><tt><b>gccld</b></tt> <dd><tt>gccld</tt> links together several LLVM |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 1086 | bytecode files into one bytecode file and does some optimization. It is |
| 1087 | the linker invoked by the GCC frontend when multiple .o files need to be |
| 1088 | linked together. Like <tt>gccas</tt>, the command line interface of |
| 1089 | <tt>gccld</tt> is designed to match the system linker, to aid |
Misha Brukman | 54111c4 | 2004-01-20 00:20:17 +0000 | [diff] [blame] | 1090 | interfacing with the GCC frontend.</dl><p> |
| 1091 | </blockquote> |
John Criswell | 85ed361 | 2003-06-12 19:34:44 +0000 | [diff] [blame] | 1092 | |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 1093 | <dt><tt><b>opt</b></tt><dd> <tt>opt</tt> reads LLVM bytecode, applies a |
| 1094 | series of LLVM to LLVM transformations (which are specified on the command |
| 1095 | line), and then outputs the resultant bytecode. The '<tt>opt --help</tt>' |
| 1096 | command is a good way to get a list of the program transformations |
Misha Brukman | 54111c4 | 2004-01-20 00:20:17 +0000 | [diff] [blame] | 1097 | available in LLVM. |
John Criswell | 85ed361 | 2003-06-12 19:34:44 +0000 | [diff] [blame] | 1098 | |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 1099 | </dl> |
John Criswell | 85ed361 | 2003-06-12 19:34:44 +0000 | [diff] [blame] | 1100 | |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 1101 | </div> |
John Criswell | 85ed361 | 2003-06-12 19:34:44 +0000 | [diff] [blame] | 1102 | |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 1103 | <!-- ======================================================================= --> |
| 1104 | <div class="doc_subsection"> |
| 1105 | <a name="utils"><tt>llvm/utils</tt></a> |
| 1106 | </div> |
John Criswell | 85ed361 | 2003-06-12 19:34:44 +0000 | [diff] [blame] | 1107 | |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 1108 | <div class="doc_text"> |
John Criswell | 85ed361 | 2003-06-12 19:34:44 +0000 | [diff] [blame] | 1109 | |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 1110 | <p>This directory contains utilities for working with LLVM source code, and some |
| 1111 | of the utilities are actually required as part of the build process because they |
| 1112 | are code generators for parts of LLVM infrastructure.</p> |
John Criswell | 85ed361 | 2003-06-12 19:34:44 +0000 | [diff] [blame] | 1113 | |
Misha Brukman | 54111c4 | 2004-01-20 00:20:17 +0000 | [diff] [blame] | 1114 | <dl> |
| 1115 | <dt><tt><b>Burg/</b></tt> <dd><tt>Burg</tt> is an instruction selector |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 1116 | generator -- it builds trees on which it then performs pattern-matching to |
| 1117 | select instructions according to the patterns the user has specified. Burg |
| 1118 | is currently used in the Sparc V9 backend.<p> |
John Criswell | 0b45920 | 2003-07-08 20:35:59 +0000 | [diff] [blame] | 1119 | |
Misha Brukman | 54111c4 | 2004-01-20 00:20:17 +0000 | [diff] [blame] | 1120 | <dt><tt><b>codegen-diff</b></tt> <dd><tt>codegen-diff</tt> is a script |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 1121 | that finds differences between code that LLC generates and code that LLI |
| 1122 | generates. This is a useful tool if you are debugging one of them, |
| 1123 | assuming that the other generates correct output. For the full user |
| 1124 | manual, run <tt>`perldoc codegen-diff'</tt>.<p> |
Misha Brukman | c103adf | 2003-08-11 18:45:46 +0000 | [diff] [blame] | 1125 | |
Misha Brukman | 54111c4 | 2004-01-20 00:20:17 +0000 | [diff] [blame] | 1126 | <dt><tt><b>cvsupdate</b></tt> <dd><tt>cvsupdate</tt> is a script that will |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 1127 | update your CVS tree, but produce a much cleaner and more organized output |
| 1128 | than simply running <tt>`cvs -z3 up -dP'</tt> will. For example, it will group |
| 1129 | together all the new and updated files and modified files in separate |
| 1130 | sections, so you can see at a glance what has changed. If you are at the |
| 1131 | top of your LLVM CVS tree, running <tt>utils/cvsupdate</tt> is the |
| 1132 | preferred way of updating the tree.<p> |
Misha Brukman | c103adf | 2003-08-11 18:45:46 +0000 | [diff] [blame] | 1133 | |
Misha Brukman | 54111c4 | 2004-01-20 00:20:17 +0000 | [diff] [blame] | 1134 | <dt><tt><b>emacs/</b></tt> <dd>The <tt>emacs</tt> directory contains |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 1135 | syntax-highlighting files which will work with Emacs and XEmacs editors, |
| 1136 | providing syntax highlighting support for LLVM assembly files and TableGen |
| 1137 | description files. For information on how to use the syntax files, consult |
| 1138 | the <tt>README</tt> file in that directory.<p> |
Misha Brukman | c103adf | 2003-08-11 18:45:46 +0000 | [diff] [blame] | 1139 | |
Misha Brukman | 54111c4 | 2004-01-20 00:20:17 +0000 | [diff] [blame] | 1140 | <dt><tt><b>getsrcs.sh</b></tt> <dd>The <tt>getsrcs.sh</tt> script finds |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 1141 | and outputs all non-generated source files, which is useful if one wishes |
| 1142 | to do a lot of development across directories and does not want to |
| 1143 | individually find each file. One way to use it is to run, for example: |
| 1144 | <tt>xemacs `utils/getsources.sh`</tt> from the top of your LLVM source |
| 1145 | tree.<p> |
| 1146 | |
Misha Brukman | 54111c4 | 2004-01-20 00:20:17 +0000 | [diff] [blame] | 1147 | <dt><tt><b>makellvm</b></tt> <dd>The <tt>makellvm</tt> script compiles all |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 1148 | files in the current directory and then compiles and links the tool that |
| 1149 | is the first argument. For example, assuming you are in the directory |
| 1150 | <tt>llvm/lib/Target/Sparc</tt>, if <tt>makellvm</tt> is in your path, |
| 1151 | simply running <tt>makellvm llc</tt> will make a build of the current |
| 1152 | directory, switch to directory <tt>llvm/tools/llc</tt> and build it, |
| 1153 | causing a re-linking of LLC.<p> |
Misha Brukman | c103adf | 2003-08-11 18:45:46 +0000 | [diff] [blame] | 1154 | |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 1155 | <dt><tt><b>NightlyTest.pl</b></tt> and |
Misha Brukman | 54111c4 | 2004-01-20 00:20:17 +0000 | [diff] [blame] | 1156 | <tt><b>NightlyTestTemplate.html</b></tt> <dd>These files are used in a |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 1157 | cron script to generate nightly status reports of the functionality of |
| 1158 | tools, and the results can be seen by following the appropriate link on |
| 1159 | the <a href="http://llvm.cs.uiuc.edu/">LLVM homepage</a>.<p> |
Misha Brukman | c103adf | 2003-08-11 18:45:46 +0000 | [diff] [blame] | 1160 | |
Misha Brukman | 54111c4 | 2004-01-20 00:20:17 +0000 | [diff] [blame] | 1161 | <dt><tt><b>TableGen/</b></tt> <dd>The <tt>TableGen</tt> directory contains |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 1162 | the tool used to generate register descriptions, instruction set |
| 1163 | descriptions, and even assemblers from common TableGen description |
| 1164 | files.<p> |
Misha Brukman | c103adf | 2003-08-11 18:45:46 +0000 | [diff] [blame] | 1165 | |
Misha Brukman | 54111c4 | 2004-01-20 00:20:17 +0000 | [diff] [blame] | 1166 | <dt><tt><b>vim/</b></tt> <dd>The <tt>vim</tt> directory contains |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 1167 | syntax-highlighting files which will work with the VIM editor, providing |
| 1168 | syntax highlighting support for LLVM assembly files and TableGen |
| 1169 | description files. For information on how to use the syntax files, consult |
| 1170 | the <tt>README</tt> file in that directory.<p> |
Misha Brukman | c103adf | 2003-08-11 18:45:46 +0000 | [diff] [blame] | 1171 | |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 1172 | </dl> |
Misha Brukman | c103adf | 2003-08-11 18:45:46 +0000 | [diff] [blame] | 1173 | |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 1174 | </div> |
Misha Brukman | c103adf | 2003-08-11 18:45:46 +0000 | [diff] [blame] | 1175 | |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 1176 | <!-- *********************************************************************** --> |
| 1177 | <div class="doc_section"> |
| 1178 | <a name="tutorial">An Example Using the LLVM Tool Chain</a> |
| 1179 | </div> |
| 1180 | <!-- *********************************************************************** --> |
Misha Brukman | c103adf | 2003-08-11 18:45:46 +0000 | [diff] [blame] | 1181 | |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 1182 | <div class="doc_text"> |
John Criswell | 85ed361 | 2003-06-12 19:34:44 +0000 | [diff] [blame] | 1183 | |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 1184 | <ol> |
| 1185 | <li>First, create a simple C file, name it 'hello.c': |
John Criswell | 85ed361 | 2003-06-12 19:34:44 +0000 | [diff] [blame] | 1186 | <pre> |
| 1187 | #include <stdio.h> |
| 1188 | int main() { |
| 1189 | printf("hello world\n"); |
| 1190 | return 0; |
| 1191 | } |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 1192 | </pre></li> |
John Criswell | 85ed361 | 2003-06-12 19:34:44 +0000 | [diff] [blame] | 1193 | |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 1194 | <li><p>Next, compile the C file into a LLVM bytecode file:</p> |
| 1195 | <p><tt>% llvmgcc hello.c -o hello</tt></p> |
John Criswell | 85ed361 | 2003-06-12 19:34:44 +0000 | [diff] [blame] | 1196 | |
Misha Brukman | f089cdf | 2004-06-22 18:48:58 +0000 | [diff] [blame] | 1197 | <p>Note that you should have already built the tools and they have to be |
| 1198 | in your path, at least <tt>gccas</tt> and <tt>gccld</tt>.</p> |
| 1199 | |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 1200 | <p>This will create two result files: <tt>hello</tt> and |
John Criswell | 85ed361 | 2003-06-12 19:34:44 +0000 | [diff] [blame] | 1201 | <tt>hello.bc</tt>. The <tt>hello.bc</tt> is the LLVM bytecode that |
| 1202 | corresponds the the compiled program and the library facilities that it |
| 1203 | required. <tt>hello</tt> is a simple shell script that runs the bytecode |
Chris Lattner | a19a3db | 2004-05-01 11:40:07 +0000 | [diff] [blame] | 1204 | file with <tt>lli</tt>, making the result directly executable. Note that |
| 1205 | all LLVM optimizations are enabled by default, so there is no need for a |
| 1206 | "-O3" switch.</p></li> |
John Criswell | 85ed361 | 2003-06-12 19:34:44 +0000 | [diff] [blame] | 1207 | |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 1208 | <li><p>Run the program. To make sure the program ran, execute one of the |
| 1209 | following commands:</p> |
John Criswell | 8df90e0 | 2003-06-11 20:46:40 +0000 | [diff] [blame] | 1210 | |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 1211 | <p><tt>% ./hello</tt></p> |
John Criswell | 85ed361 | 2003-06-12 19:34:44 +0000 | [diff] [blame] | 1212 | |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 1213 | <p>or</p> |
John Criswell | 85ed361 | 2003-06-12 19:34:44 +0000 | [diff] [blame] | 1214 | |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 1215 | <p><tt>% lli hello.bc</tt></p></li> |
John Criswell | 85ed361 | 2003-06-12 19:34:44 +0000 | [diff] [blame] | 1216 | |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 1217 | <li><p>Use the <tt>llvm-dis</tt> utility to take a look at the LLVM assembly |
| 1218 | code:</p> |
John Criswell | 85ed361 | 2003-06-12 19:34:44 +0000 | [diff] [blame] | 1219 | |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 1220 | <p><tt>% llvm-dis < hello.bc | less</tt><p></li> |
John Criswell | 85ed361 | 2003-06-12 19:34:44 +0000 | [diff] [blame] | 1221 | |
Chris Lattner | b3bbcba | 2004-06-02 20:37:02 +0000 | [diff] [blame] | 1222 | <li><p>Compile the program to native assembly using the LLC code |
| 1223 | generator:</p> |
John Criswell | 85ed361 | 2003-06-12 19:34:44 +0000 | [diff] [blame] | 1224 | |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 1225 | <p><tt>% llc hello.bc -o hello.s</tt></p> |
John Criswell | 85ed361 | 2003-06-12 19:34:44 +0000 | [diff] [blame] | 1226 | |
Chris Lattner | b3bbcba | 2004-06-02 20:37:02 +0000 | [diff] [blame] | 1227 | <li><p>Assemble the native assembly language file into a program:</p> |
John Criswell | 85ed361 | 2003-06-12 19:34:44 +0000 | [diff] [blame] | 1228 | |
Chris Lattner | b3bbcba | 2004-06-02 20:37:02 +0000 | [diff] [blame] | 1229 | <p><b>Solaris:</b><tt>% /opt/SUNWspro/bin/cc -xarch=v9 hello.s -o hello.native</tt></p> |
| 1230 | <p><b>Others:</b><tt>% gcc hello.s -o hello.native</tt></p> |
John Criswell | 85ed361 | 2003-06-12 19:34:44 +0000 | [diff] [blame] | 1231 | |
Chris Lattner | b3bbcba | 2004-06-02 20:37:02 +0000 | [diff] [blame] | 1232 | <li><p>Execute the native code program:</p> |
John Criswell | 85ed361 | 2003-06-12 19:34:44 +0000 | [diff] [blame] | 1233 | |
Chris Lattner | b3bbcba | 2004-06-02 20:37:02 +0000 | [diff] [blame] | 1234 | <p><tt>% ./hello.native</tt></p></li> |
John Criswell | 85ed361 | 2003-06-12 19:34:44 +0000 | [diff] [blame] | 1235 | |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 1236 | </ol> |
John Criswell | 85ed361 | 2003-06-12 19:34:44 +0000 | [diff] [blame] | 1237 | |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 1238 | </div> |
John Criswell | 85ed361 | 2003-06-12 19:34:44 +0000 | [diff] [blame] | 1239 | |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 1240 | <!-- *********************************************************************** --> |
| 1241 | <div class="doc_section"> |
| 1242 | <a name="problems">Common Problems</a> |
| 1243 | </div> |
| 1244 | <!-- *********************************************************************** --> |
John Criswell | ce760f6 | 2003-07-03 16:01:38 +0000 | [diff] [blame] | 1245 | |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 1246 | <div class="doc_text"> |
John Criswell | ce760f6 | 2003-07-03 16:01:38 +0000 | [diff] [blame] | 1247 | |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 1248 | <p>If you are having problems building or using LLVM, or if you have any other |
| 1249 | general questions about LLVM, please consult the <a href="FAQ.html">Frequently |
| 1250 | Asked Questions</a> page.</p> |
John Criswell | 85ed361 | 2003-06-12 19:34:44 +0000 | [diff] [blame] | 1251 | |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 1252 | </div> |
John Criswell | 85ed361 | 2003-06-12 19:34:44 +0000 | [diff] [blame] | 1253 | |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 1254 | <!-- *********************************************************************** --> |
| 1255 | <div class="doc_section"> |
| 1256 | <a name="links">Links</a> |
| 1257 | </div> |
| 1258 | <!-- *********************************************************************** --> |
John Criswell | 85ed361 | 2003-06-12 19:34:44 +0000 | [diff] [blame] | 1259 | |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 1260 | <div class="doc_text"> |
John Criswell | 85ed361 | 2003-06-12 19:34:44 +0000 | [diff] [blame] | 1261 | |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 1262 | <p>This document is just an <b>introduction</b> to how to use LLVM to do |
| 1263 | some simple things... there are many more interesting and complicated things |
| 1264 | that you can do that aren't documented here (but we'll gladly accept a patch |
| 1265 | if you want to write something up!). For more information about LLVM, check |
| 1266 | out:</p> |
John Criswell | 85ed361 | 2003-06-12 19:34:44 +0000 | [diff] [blame] | 1267 | |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 1268 | <ul> |
| 1269 | <li><a href="http://llvm.cs.uiuc.edu/">LLVM homepage</a></li> |
| 1270 | <li><a href="http://llvm.cs.uiuc.edu/doxygen/">LLVM doxygen tree</a></li> |
| 1271 | <li><a href="http://llvm.cs.uiuc.edu/docs/Projects.html">Starting a Project |
| 1272 | that Uses LLVM</a></li> |
| 1273 | </ul> |
| 1274 | |
| 1275 | </div> |
| 1276 | |
| 1277 | <!-- *********************************************************************** --> |
| 1278 | |
| 1279 | <hr> |
Misha Brukman | 142207b | 2003-11-22 01:30:01 +0000 | [diff] [blame] | 1280 | <address> |
Misha Brukman | 54111c4 | 2004-01-20 00:20:17 +0000 | [diff] [blame] | 1281 | <a href="http://jigsaw.w3.org/css-validator/check/referer"><img |
| 1282 | src="http://jigsaw.w3.org/css-validator/images/vcss" alt="Valid CSS!"></a> |
| 1283 | <a href="http://validator.w3.org/check/referer"><img |
| 1284 | src="http://www.w3.org/Icons/valid-html401" alt="Valid HTML 4.01!" /></a> |
| 1285 | |
Misha Brukman | 142207b | 2003-11-22 01:30:01 +0000 | [diff] [blame] | 1286 | <a href="mailto:sabre@nondot.org">Chris Lattner</a><br> |
| 1287 | <a href="http://llvm.cs.uiuc.edu">The LLVM Compiler Infrastructure</a><br> |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 1288 | Last modified: $Date$ |
Misha Brukman | 142207b | 2003-11-22 01:30:01 +0000 | [diff] [blame] | 1289 | </address> |
Misha Brukman | 00c73d2 | 2003-11-07 19:43:14 +0000 | [diff] [blame] | 1290 | |
| 1291 | </body> |
Guochun Shi | f4688a8 | 2002-07-17 23:05:56 +0000 | [diff] [blame] | 1292 | </html> |