[LLVMdev] could you give me some advice ?

[lizhuo]

for example , I have a LLVM bc file generated from c program like this 
...
char E1$str[3] = "E1";
char* E1$entry = (char*)E1$str;
struct { char* name_list[16]; } table = { E1$entry, E2$entry, ... };
...            
now I need load the bc file , get all names ("E1","E2"...) , then print and save it.
of course, i only know the global variable table name . I can get E1$entry from table ,
I want to get the string pointed by E1$entry . 
Now is there a simple solution to get the string object ?
thanks.

>On Sat, 25 Mar 2006, lizhuo wrote:
>> ; define ConstantArray
>> "E1$str" = internal constant [3 x sbyte] c"E1\00"
>>
>> ; use getPtrPtrFromArrayPtr to define SByte* from ConstantArray
>> "E1$entry" = internal constant sbyte* getelementptr ([3 x sbyte]* "E1$str", uint 0, uint 0)
>> ...
>>
>> when i want to get std::string object from this declaration in another program
>>
>> 	Module* m = loadModule("XXX.bc");
>> 	Constant* c =  findValue(m,"E1$entry");
>> 	GlobalVariable* gv = cast<GlobalVariable>(c->getOperand(0));
>> 	ConstantArray* ca = cast<ConstantArray>(gv->getOperand(0));
>> 	std::string str = ca->getAsString();
>>
>> now str = "E1"
>> these code looks a little ugly , could you tell me better solution ?
>> In another word , I want to know the reverse operation of ConstantExpr::getPtrPtrFromArrayPtr .
>
>I'm not sure I understand.  You have a pointer to "E1$entry" and you want 
>the string it points to?  I assume this is what your findValue 
>function does?
>
>-Chris