[LLVMdev] patch to docs/BitCodeFormat.html

[Chris Lattner]

On Mon, 8 Oct 2007, Joshua Haberman wrote:
> I wrote in a few weeks ago about writing an independent implementation of 
> Bitcode and updating the docs to be more complete.
>
> Attached is a patch to docs/BitCodeFormat.html that adds a lot of information 
> that was previously only available by reading the source code.  It also 
> corrects some errors.

Very nice, applied:
http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20071008/054344.html

If you're developing an independent reimplementation, you should make use 
of the llvm-bcanalyzer tool.  It can dump out the file in an xml'y format, 
like this:

$ llvm-bcanalyzer test.bc -dump
<MODULE_BLOCK NumWords=166 BlockCodeSize=3>
   <BLOCKINFO_BLOCK/>
   <TYPE_BLOCK NumWords=12 BlockCodeSize=4>
     <NUMENTRY op0=14/>
     <POINTER abbrevid=4 op0=2/>
     <INTEGER op0=32/>
     <VECTOR op0=4 op1=4/>
     <LABEL/>
     <FLOAT/>
     <POINTER abbrevid=4 op0=0/>
     <POINTER abbrevid=4 op0=4/>
     <POINTER abbrevid=4 op0=10/>
     <POINTER abbrevid=4 op0=11/>
     <POINTER abbrevid=4 op0=12/>
     <STRUCT abbrevid=6 op0=0 op1=2/>
     <FUNCTION abbrevid=5 op0=0 op1=0 op2=13 op3=0 op4=4/>
     <ARRAY abbrevid=7 op0=4 op1=4/>
     <VOID/>
   </TYPE_BLOCK>
   <TRIPLE op0=112 op1=111 op2=119 
...

It can only give names to the tags if the content format is recognized, 
but it still may be useful.  Thanks for the docs!

-Chris

-- 
http://nondot.org/sabre/
http://llvm.org/