[LLVMdev] int to StringRed conversion

[Alexandru Ionut Diaconescu]

Yes, it sounds good. I can try tomorrow.

Thank you for your advice !


On Thu, May 2, 2013 at 5:43 PM, Logan Chien <tzuhsiang.chien at gmail.com>wrote:

> I think the better solution should be:
>
>
> LLVMContext& C = is->getContext();
> Value *values[] = {
>   ConstantInt::getSigned(Type::getInt64Ty(C), *scsr*),
>   MDString::get(C, *"path"*)
> };
>
> lnstr.setMetadata(*"your_analysis_name"*, MDNode::get(C, values));
>
> So that you can take advantage of the type system of LLVM bitcode, and
> don't have to cast the integers from/to strings by yourself.
>
> Logan
>
>
> On Thu, May 2, 2013 at 11:10 PM, Alexandru Ionut Diaconescu <
> alexandruionutdiaconescu at gmail.com> wrote:
>
>> The problem is that I want to pass only srsr which is an int. "marked"
>> was just an example :)
>>
>> Thanks you!
>>
>>
>> On Thu, May 2, 2013 at 5:06 PM, Logan Chien <tzuhsiang.chien at gmail.com>wrote:
>>
>>> I'm not familiar with this, but maybe you can try:
>>>
>>> StringRef tst = ("marked" + Twine(srsr)).str();
>>>
>>> It seems that you can't use integer as meta data kind name.
>>>
>>> Logan
>>>
>>>
>>> On Thu, May 2, 2013 at 10:59 PM, Alexandru Ionut Diaconescu <
>>> alexandruionutdiaconescu at gmail.com> wrote:
>>>
>>>> Thank you for your help!
>>>>
>>>> Almost solved my problem. Now I don't have any compilation errors. I
>>>> have only one segfault:
>>>>
>>>> opt: LLVMContext.cpp:147: unsigned int
>>>> llvm::LLVMContext::getMDKindID(llvm::StringRef) const: Assertion
>>>> `isValidName(Name) && "Invalid MDNode name"' failed.
>>>>
>>>> This is due because when I setMetadata() it failes.
>>>>
>>>> StringRef tsts = llvm::Twine(srsr).str();
>>>> ....
>>>> LLVMContext& C = is->getContext();
>>>> MDNode* N = MDNode::get(C, MDString::get(C, "path"));
>>>> is->setMetadata(tsts, N);
>>>>
>>>>
>>>> If I put
>>>> is->setMetadata("marked", N);, it goes ok and the .bc is modified. But
>>>> if I directly put tsts it failes...
>>>>
>>>> and the definition is :
>>>>  void Instruction::setMetadata ( StringRef<http://llvm.org/docs/doxygen/html/classllvm_1_1StringRef.html>
>>>>   *Kind*,
>>>>
>>>> MDNode <http://llvm.org/docs/doxygen/html/classllvm_1_1MDNode.html> *
>>>> *Node*
>>>> )
>>>>
>>>> I don't know how I can use the tsts parameter..
>>>>
>>>> Thank you again !
>>>>
>>>>
>>>> On Thu, May 2, 2013 at 4:42 PM, Logan Chien <tzuhsiang.chien at gmail.com>wrote:
>>>>
>>>>> Hi,
>>>>>
>>>>>   I think you may try to use llvm::Twine(int).  For example, to
>>>>> convert 30 to string, you can use:
>>>>>
>>>>> Twine(30).str()
>>>>>
>>>>> To convert the string back to integer, you can try the
>>>>> StringRef::getAsInteger(unsigned, APInt &).  For example:
>>>>>
>>>>> APInt i;
>>>>> str.getAsInteger(/*radix=*/ 10, /*output=*/ i);
>>>>>
>>>>> Sincerely,
>>>>> Logan
>>>>>
>>>>>
>>>>>
>>>>>  On Thu, May 2, 2013 at 9:53 PM, Alexandru Ionut Diaconescu <
>>>>> alexandruionutdiaconescu at gmail.com> wrote:
>>>>>
>>>>>>  Hello everyone,
>>>>>>
>>>>>> I have an integer and I want to convert it to StringRef in order to
>>>>>> set metadata.
>>>>>> setMetadata->(StringRef, MDNode*);
>>>>>>
>>>>>> It is there a native LLVM way to do it?
>>>>>>
>>>>>> 1. In the llvm::APSInt Class is toString() method, which seems it is
>>>>>> not for this purpose
>>>>>> 2. itoa and string are not part of LLVM
>>>>>> 3. stringstream is not part of LLVM
>>>>>> 4. to_string is not part of LLVM
>>>>>> 5. any casting method?
>>>>>>
>>>>>> Also, I would like to get the metadata and convert it back to integer.
>>>>>>
>>>>>> Thank you !
>>>>>>
>>>>>> _______________________________________________
>>>>>> LLVM Developers mailing list
>>>>>> LLVMdev at cs.uiuc.edu         http://llvm.cs.uiuc.edu
>>>>>> http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev
>>>>>>
>>>>>>
>>>>>
>>>>
>>>>
>>>> --
>>>> Best regards,
>>>> Alexandru Ionut Diaconescu
>>>>
>>>
>>>
>>
>>
>> --
>> Best regards,
>> Alexandru Ionut Diaconescu
>>
>
>


-- 
Best regards,
Alexandru Ionut Diaconescu
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