[LLVMdev] def-use chain for Instruction
neda 8664
neda8664 at gmail.com
Sat May 7 09:14:44 PDT 2011
Hello all,
I am a LLVM newer who want to obtain the use-def chain for all instruction
of a sample code, for this purpose i use the following code.
///////////////sample code://///////////////////////
#include <stdlib.h>
#include <stdio.h>
#include <time.h>
#define ARRAY_SIZE 5
int main() {
int x, y, holder;
int k,z,f,i;
z=0;
f=0;
k=0;
for(x = 0; x < ARRAY_SIZE; x++)
for(y = 0; y < ARRAY_SIZE-1; y++)
if(x+y>10) {
holder = x+y;
k=z+1;
f=k+x;
if (i>k)
i=i+1;
}
// return 1;
}
////////////////////////pass code://///////////////////////////////
virtual bool runOnFunction(Function &F) {
std::vector<Instruction*> worklist;
for(inst_iterator I = inst_begin(F), E = inst_end(F); I != E; ++I){
worklist.push_back(&*I);
}
for(std::vector<Instruction*>::iterator iter = worklist.begin();
iter != worklist.end(); ++iter){
Instruction* instr = *iter;
errs() << "def: " <<*instr << "\n";
for(Value::use_iterator i = instr->use_begin(), ie =
instr->use_end(); i!=ie; ++i){
Value *v = *i;
Instruction *vi = dyn_cast<Instruction>(*i);
errs() << "\t\t" << *vi << "\n";
}
}
return false;
}
//////////////output///////////////
def: ret void
but my output isn't my aim, can anyone help me?
Thanks
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