Remove FreeInst.

Remove LowerAllocations pass.
Update some more passes to treate free calls just like they were treating FreeInst.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85176 91177308-0d34-0410-b5e6-96231b3b80d8

examples/BrainF/BrainF.cpp

@@ -117,8 +117,8 @@ void BrainF::header(LLVMContext& C) {
   //brainf.end:
   endbb = BasicBlock::Create(C, label, brainf_func);
 
-  //free i8 *%arr
-  new FreeInst(ptr_arr, endbb);
+  //call free(i8 *%arr)
+  endbb->getInstList().push_back(CallInst::CreateFree(ptr_arr, endbb));
 
   //ret void
   ReturnInst::Create(C, endbb);