[LLVMdev] int to StringRed conversion

[Alexandru Ionut Diaconescu]

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
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