llvm dev - Jul 2013 - [LLVMdev] Passing String to an external function in llvm

Hi All,

On my llvm pass I have some variable named "expr" which is being
declared as
:-
string expr;      // or  char  *expr; //

Now I want to pass this "expr" to some external function.
How can I do this??

Similarly, How can I pass variable "var" to an external function which
is
being decalred as :-
Vector<int> var;

Any help will be appreciated.............. 



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On Thu, Jul 25, 2013 at 9:07 AM, Abhinash Jain <omnia at mailinator.com>
wrote:
> Hi All,
>
> On my llvm pass I have some variable named "expr" which is being
declared as
> :-
> string expr;      // or  char  *expr; //
I don't understand this question - these are C++ declarations, not
LLVM declarations (not to mention LLVM IR doesn't have
"variables", as
such). So what's the actual LLVM entity you're dealing with?
> Now I want to pass this "expr" to some external function.
> How can I do this??
Have you tried compiling some code with Clang to see what IR it
produces for different types, calls, and passing?
>
> Similarly, How can I pass variable "var" to an external function
which is
> being decalred as :-
> Vector<int> var;
>
> Any help will be appreciated..............
>
>
>
> --
> View this message in context:
http://llvm.1065342.n5.nabble.com/Passing-String-to-an-external-function-in-llvm-tp59798.html
> 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
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I did some computation through llvm pass, and store those computed values on
string.  eg. :-

stringstream lhs;
lhs << instr->getOperand(1);   //  'instr' is some instruction
string lhsvar=lhs.str();

Now I want to pass this 'lhsvar' to the external function, so how can i
do
this???

This is just the part of a code to make you understand. if you say I can
even provide the link to the code.







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