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.
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.
The purpose of this document is to hopefully reduce some of the trial and error that the author experienced in using LLVM.
The table below provides a summary of the basic contents of each file.
| Summary Of LLVM Library And Object Files | |
Library |
Description |
| libipo.a | An archive of all interprocedural optimizations. |
| libscalaropts.a | An archive of all scalar optimizations. |
| libtransforms.a | Uncategorized transformations. |
| libtarget.a | An archive containing generic code generator support. |
| libanalysis.a | An archive containing intraprocedural analyses. |
| libdatastructure.a | An archive containing Data Structure Analysis. |
| libinstrument.a | Intraprocedural instrumentation and utilities. |
| libsparcv9regalloc.a | SparcV9 graph-coloring register allocator. |
| libipa.a | An archive containing interprocedural analyses |
| libtransformutils.a | Utility functions for transformations. |
| libsupport.a | General support utilities |
Object File |
Description |
| support.o | General support utilities |
| asmparser.o | Assembler Parser |
| bcreader.o | Bytecode Reader |
| bcwriter.o | Bytecode Writer |
| sched.o | SparcV9 instruction scheduler |
| selectiondag.o | Aggressive instruction selector for Directed Acyclic Graphs |
| transformutils.o | Utilities for code transformations |
| ipa.o | Interprocedural Analyses |
| sparcv9select.o | SparcV9 instruction selector |
| cwriter.o | "C" Code Writer |
| profpaths.o | Path profiling instrumentation |
| sparcv9regalloc.o | SparcV9 graph-coloring register allocator |
| instrument.o | Intraprocedural instrumentation and utilities. |
| datastructure.o | Data Structure Analysis |
| codegen.o | Native code generation |
| sparcv9livevar.o | SparcV9 Live Variable Analysis |
| vmcore.o | Virtual Machine Core |
| lli-interpreter.o | Interpreter for LLVM ByteCode |
| lli-jit.o | Just-In-Time Compiler For LLVM ByteCode |
| executionengine.o | Engine for LLI |
| debugger.o | Source Level Debugging Support |
| analysis.o | General framework for Analysis |
| sparcv9.o | SparcV9 backend |
| target.o | Generic backend support |
| transforms.o | Uncategorized transformations. |
| x86.o | Intel x86 backend |
| powerpc.o | PowerPC backend |
| scalaropts.o | Optimizations For Scalars |
| ipo.o | Interprocedural Optimizations |
| trace.o | Support For Tracing/Debugging? |
| profile_rt.o | Runtime Library For Profiler |
| sample.o | Sample Program ? |
| stkr_compiler.o | Stacker Language Compiler Library |
| stkr_runtime.o | Stacker Language Runtime Library |
This section contains various "rules of thumb" about what files you should link into your programs.
No matter what you do with LLVM, you'll always need to link with vmcore.o and support.a.
Need more rules of thumb here.