[LLVMdev] Accessing instruction/operand names
j.stanier at sussex.ac.uk
Wed Apr 15 09:26:10 PDT 2009
Everything that has been said is correct -- I'm using a std::map to index the
pointers to Values, and I think what I'm doing is going to work now although
it'll need a few more hours before I find out for sure!
Thanks ever so much for the help.
Jeffrey Yasskin wrote:
> The other repliers have been right that you probably want to use
> Value*s rather than string names in constructing your dependency
> graph, but I wanted to clear up a second possible point of confusion.
> When you see %2 in the assembly, that's an indication that the
> instruction's name is empty. That is, value->getName() == "". As far
> as I know, llvm-dis just generates numbers in order for un-named
> instructions. When the instruction has a name (value->getName() ==
> "the_name"), you get %the_name instead of the number. Does that make
> On Wed, Apr 15, 2009 at 6:20 AM, James Stanier <j.stanier at sussex.ac.uk>
>> Hello everyone,
>> I'm currently constructing a graph from LLVM bitcode, and I have a
>> about accessing the names of the variables shown in the .ll assembly
>> assuming it's possible...
>> For example, with
>> %2 = load i32* %x_addr, align 4 ; <i32> [#uses=1]
>> I can retrieve the opcodeName() from the Instruction object, which is
>> "load". I can also access the operand and use getName() to retrieve
>> "x_addr". However, this instruction is storing into %2 - how do I access
>> name of that?
>> Also, when an operand is a numbered temporary such as
>> %3 = add i32 %2, %1 ; <i32> [#uses=1]
>> I'm also unable to access the name of it. Are these numberings no longer
>> present in the bitcode? If not, is there any way to find out the name of
>> which local variable it is referencing?
>> Thanks in advance - I've been stuck on this for a while.
>> View this message in context:
>> Sent from the LLVM - Dev mailing list archive at Nabble.com.
>> LLVM Developers mailing list
>> LLVMdev at cs.uiuc.edu http://llvm.cs.uiuc.edu
> LLVM Developers mailing list
> LLVMdev at cs.uiuc.edu http://llvm.cs.uiuc.edu
View this message in context: http://www.nabble.com/Accessing-instruction-operand-names-tp23058683p23062395.html
Sent from the LLVM - Dev mailing list archive at Nabble.com.
More information about the llvm-dev