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| <title>Object Files: Understanding The Result Of LLVM Compilation</title> |
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| <body> |
| <div class="doc_title">Object Files: Understanding The Result Of LLVM Compilation</div> |
| <hr> |
| <ol> |
| <li><a href="#abstract">Abstract</a></li> |
| <li><a href="#introduction">Introduction</a></li> |
| <li><a href="#files">File Contents</a></li> |
| <li><a href="#rot">Linkage Rules Of Thumb</a> |
| <ol> |
| <li><a href="#always">Always Link vmcore.o, support.a</a> |
| <li><a href="#placeholder">Placeholder</a> |
| </ol> |
| </li> |
| </ol> |
| <div class="doc_text"> |
| <p><b>Written by <a href="mailto:rspencer@x10sys.com">Reid Spencer</a> </b></p> |
| <p> </p> |
| </div> |
| <hr> |
| <!-- ======================================================================= --> |
| <div class="doc_section"><a name="abstract">Abstract</a></div> |
| <div class="doc_text"> |
| <p>This document describes the contents of the many objects files and libraries |
| that are produced by compiling LLVM. To make use of LLVM this information is |
| needed in order to understand what files should be linked into your program. |
| </p> |
| </div> |
| <!-- ======================================================================= --> |
| <div class="doc_section"> <a name="introduction">Introduction</a></div> |
| <div class="doc_text"> |
| <p>If you're writing a compiler, virtual machine, or any other utility for |
| LLVM, you'll need to figure out which of the many .a (archive) and .o |
| (object) files you will need to link with to be successful. An |
| understanding of the contents of these files and their inter-relationships |
| will be useful in coming up with an optimal specification for the objects |
| and libraries to link with. |
| </p> |
| <p>The purpose of this document is to hopefully reduce some of the trial and |
| error that the author experienced in using LLVM. |
| </p> |
| </div> |
| <!-- ======================================================================= --> |
| <div class="doc_section"><a name="files"></a>File Contents</div> |
| <div class="doc_text"> |
| <p>The table below provides a summary of the basic contents of each file.</p> |
| <table class="doc_table" |
| style="width:80%; text-align: left; border: 2px solid blue; border-collapse: collapse;"> |
| <tr class="doc_table"> |
| <td colspan="2" class="doc_section">Summary Of LLVM Library And Object Files |
| </td> |
| </tr> |
| <tr class="doc_table"> |
| <td style="border: 2px solid blue"><h2><u>Library</u></h2></td> |
| <td style="border: 2px solid blue"><h2><u>Description</u></h2></td> |
| </tr> |
| <tr class="doc_table"> |
| <td style="border: 2px solid blue">libipo.a</td> |
| <td style="border: 2px solid blue"> |
| An archive of all inter-procedural optimizations. |
| </td> |
| </tr> |
| <tr class="doc_table"> |
| <td style="border: 2px solid blue">libscalaropts.a</td> |
| <td style="border: 2px solid blue"> |
| An archive of all scalar optimizations. |
| </td> |
| </tr> |
| <tr class="doc_table"> |
| <td style="border: 2px solid blue">libtransforms.a</td> |
| <td style="border: 2px solid blue"> |
| An archive of just the level raise pass. |
| </td> |
| </tr> |
| <tr class="doc_table"> |
| <td style="border: 2px solid blue">libtarget.a</td> |
| <td style="border: 2px solid blue"> |
| An archive containing code generator support for describing |
| target architectures. |
| </td> |
| </tr> |
| <tr class="doc_table"> |
| <td style="border: 2px solid blue">libanalysis.a</td> |
| <td style="border: 2px solid blue"> |
| An archive containing intra-procedural analyses. |
| </td> |
| </tr> |
| <tr class="doc_table"> |
| <td style="border: 2px solid blue">libdatastructure.a</td> |
| <td style="border: 2px solid blue"> |
| An archive containing optimizations for data structures. |
| </td> |
| </tr> |
| <tr class="doc_table"> |
| <td style="border: 2px solid blue">libinstrument.a</td> |
| <td style="border: 2px solid blue">No idea.</td> |
| </tr> |
| <tr class="doc_table"> |
| <td style="border: 2px solid blue">libregalloc.a</td> |
| <td style="border: 2px solid blue">Register Allocation code.</td> |
| </tr> |
| <tr class="doc_table"> |
| <td style="border: 2px solid blue">libipa.a</td> |
| <td style="border: 2px solid blue"> |
| An archive containing inter-procedural analyses</td> |
| </tr> |
| <tr class="doc_table"> |
| <td style="border: 2px solid blue">libtransformutils.a</td> |
| <td style="border: 2px solid blue"> |
| Utiltities for transformations? |
| </td> |
| </tr> |
| <tr class="doc_table"> |
| <td style="border: 2px solid blue">libsupport.a</td> |
| <td style="border: 2px solid blue">General support utilities</td> |
| </tr> |
| <tr class="doc_table"> |
| <td style="border: 2px solid blue">libevar.a</td> |
| <td style="border: 2px solid blue">Live variable analysis for SPARC</td> |
| </tr> |
| <tr class="doc_table"> |
| <td style="border: 2px solid blue"><h2><u>Object File</u></h2></td> |
| <td style="border: 2px solid blue"><h2><u>Description</u></h2></td> |
| </tr> |
| <tr class="doc_table"> |
| <td style="border: 2px solid blue">support.o</td> |
| <td style="border: 2px solid blue">General support utilities</td> |
| </tr> |
| <tr class="doc_table"> |
| <td style="border: 2px solid blue">asmparser.o</td> |
| <td style="border: 2px solid blue">Assembler Parser</td> |
| </tr> |
| <tr class="doc_table"> |
| <td style="border: 2px solid blue">bcreader.o</td> |
| <td style="border: 2px solid blue">Byte Code Reader</td> |
| </tr> |
| <tr class="doc_table"> |
| <td style="border: 2px solid blue">bcwriter.o</td> |
| <td style="border: 2px solid blue">Byte Code Writer</td> |
| </tr> |
| <tr class="doc_table"> |
| <td style="border: 2px solid blue">sched.o</td> |
| <td style="border: 2px solid blue">SPARC instruction scheduler</td> |
| </tr> |
| <tr class="doc_table"> |
| <td style="border: 2px solid blue">selectiondag.o</td> |
| <td style="border: 2px solid blue">Aggressive instruction selector for Directed Acyclic Graphs</td> |
| </tr> |
| <tr class="doc_table"> |
| <td style="border: 2px solid blue">transformutils.o</td> |
| <td style="border: 2px solid blue">Utilities for code transformations</td> |
| </tr> |
| <tr class="doc_table"> |
| <td style="border: 2px solid blue">ipa.o</td> |
| <td style="border: 2px solid blue">Inter-Procedural Analysis Optimizations</td> |
| </tr> |
| <tr class="doc_table"> |
| <td style="border: 2px solid blue">select.o</td> |
| <td style="border: 2px solid blue">SPARC instruction selector</td> |
| </tr> |
| <tr class="doc_table"> |
| <td style="border: 2px solid blue">cwriter.o</td> |
| <td style="border: 2px solid blue">"C" Code Writer</td> |
| </tr> |
| <tr class="doc_table"> |
| <td style="border: 2px solid blue">profpaths.o</td> |
| <td style="border: 2px solid blue">Path profiling instrumentation</td> |
| </tr> |
| <tr class="doc_table"> |
| <td style="border: 2px solid blue">regalloc.o</td> |
| <td style="border: 2px solid blue">Register Allocation</td> |
| </tr> |
| <tr class="doc_table"> |
| <td style="border: 2px solid blue">instrument.o</td> |
| <td style="border: 2px solid blue">Instrumentation? Of What?</td> |
| </tr> |
| <tr class="doc_table"> |
| <td style="border: 2px solid blue">datastructure.o</td> |
| <td style="border: 2px solid blue">Data Structure Analysis</td> |
| </tr> |
| <tr class="doc_table"> |
| <td style="border: 2px solid blue">codegen.o</td> |
| <td style="border: 2px solid blue">Native code generation</td> |
| </tr> |
| <tr class="doc_table"> |
| <td style="border: 2px solid blue">livevar.o</td> |
| <td style="border: 2px solid blue">Live Variable Analysis</td> |
| </tr> |
| <tr class="doc_table"> |
| <td style="border: 2px solid blue">vmcore.o</td> |
| <td style="border: 2px solid blue">Virtual Machine Core</td> |
| </tr> |
| <tr class="doc_table"> |
| <td style="border: 2px solid blue">lli-interpreter.o</td> |
| <td style="border: 2px solid blue">Interpreter for LLVM ByteCode</td> |
| </tr> |
| <tr class="doc_table"> |
| <td style="border: 2px solid blue">lli-jit.o</td> |
| <td style="border: 2px solid blue"> |
| Just-In-Time Compiler For LLVM ByteCode |
| </td> |
| </tr> |
| <tr class="doc_table"> |
| <td style="border: 2px solid blue">executionengine.o</td> |
| <td style="border: 2px solid blue">Engine for LLI</td> |
| </tr> |
| <tr class="doc_table"> |
| <td style="border: 2px solid blue">debugger.o</td> |
| <td style="border: 2px solid blue">Source Level Debugging Support</td> |
| </tr> |
| <tr class="doc_table"> |
| <td style="border: 2px solid blue">analysis.o</td> |
| <td style="border: 2px solid blue">General Framework For Analysis?</td> |
| </tr> |
| <tr class="doc_table"> |
| <td style="border: 2px solid blue">sparc.o</td> |
| <td style="border: 2px solid blue">Sun SPARC Processor Specific</td> |
| </tr> |
| <tr class="doc_table"> |
| <td style="border: 2px solid blue">target.o</td> |
| <td style="border: 2px solid blue">Target Machine Support?</td> |
| </tr> |
| <tr class="doc_table"> |
| <td style="border: 2px solid blue">transforms.o</td> |
| <td style="border: 2px solid blue">Code Transformations</td> |
| </tr> |
| <tr class="doc_table"> |
| <td style="border: 2px solid blue">x86.o</td> |
| <td style="border: 2px solid blue">Intel x86 Processor Specific</td> |
| </tr> |
| <tr class="doc_table"> |
| <td style="border: 2px solid blue">powerpc.o</td> |
| <td style="border: 2px solid blue">PowerPC Processor Specific</td> |
| </tr> |
| <tr class="doc_table"> |
| <td style="border: 2px solid blue">scalaropts.o</td> |
| <td style="border: 2px solid blue">Optimizations For Scalars</td> |
| </tr> |
| <tr class="doc_table"> |
| <td style="border: 2px solid blue">ipo.o</td> |
| <td style="border: 2px solid blue">Inter-Procedural Optimization</td> |
| </tr> |
| <tr class="doc_table"> |
| <td style="border: 2px solid blue">trace.o</td> |
| <td style="border: 2px solid blue">Support For Tracing/Debugging?</td> |
| </tr> |
| <tr class="doc_table"> |
| <td style="border: 2px solid blue">profile_rt.o</td> |
| <td style="border: 2px solid blue">Runtime Library For Profiler</td> |
| </tr> |
| <tr class="doc_table"> |
| <td style="border: 2px solid blue">sample.o</td> |
| <td style="border: 2px solid blue">Sample Program ?</td> |
| </tr> |
| <tr class="doc_table"> |
| <td style="border: 2px solid blue">stkr_compiler.o</td> |
| <td style="border: 2px solid blue">Stacker Language Compiler Library</td> |
| </tr> |
| <tr class="doc_table"> |
| <td style="border: 2px solid blue">stkr_runtime.o</td> |
| <td style="border: 2px solid blue">Stacker Language Runtime Library</td> |
| </tr> |
| </table> |
| </div> |
| <p></p> |
| <!-- ======================================================================= --> |
| <div class="doc_section"><a name="rot">Linkage Rules Of Thumb</a></div> |
| <div class="doc_text"> |
| <p>This section contains various "rules of thumb" about what files you |
| should link into your programs.</p> |
| </div> |
| <!-- ======================================================================= --> |
| <div class="doc_subsection"><a name="always">Always Link vmcore.o support.a</a> |
| </div> |
| <div class="doc_text"> |
| <p>No matter what you do with LLVM, you'll always need to link with vmcore.o |
| and support.a.</p> |
| </div> |
| <!-- ======================================================================= --> |
| <div class="doc_subsection"><a name="Placeholder">Placeholder</a></div> |
| <div class="doc_text"> |
| <p>Need more rules of thumb here.</p> |
| </div> |
| <!-- ======================================================================= --> |
| <hr> |
| <div class="doc_footer"> |
| <address><a href="mailto:rspencer@x10sys.com">Reid Spencer</a></address> |
| <a href="http://llvm.cs.uiuc.edu">The LLVM Compiler Infrastructure</a> |
| <br>Last modified: $Date$ </div> |
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