llvm dev - Nov 2011 - [LLVMdev] MemoryDependenceAnalysis && MemDepResult

How can extract memory dependence among of instructions. I used the
following code but it find only one dep for a instruction.I want to get all
dependences for an instruction.

    MemoryDependenceAnalysis &mda =
getAnalysis<MemoryDependenceAnalysis>();

            MemDepResult mdr = mda.getDependency(inst);


            if (mdr.isDef()) {
                Instruction *dep = mdr.getInst();

                if (isa<LoadInst>(inst)) {
                    if (isa<StoreInst>(dep)) {
                           //READ AFTER WRITE
                    }
                }
                if (isa<StoreInst>(inst)) {
                    if (isa<LoadInst>(dep)) {
                          //WRITE AFTER READ
                    }
                    if (isa<StoreInst>(dep)) {
                         //WRITE AFTER WRITE
                    }
                }
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