CodeGenPrepare.cpp

        BBI = NC;
      }
    } else if (CallInst *CI = dyn_cast<CallInst>(I)) {
      // If we found an inline asm expession, and if the target knows how to
      // lower it to normal LLVM code, do so now.
      if (TLI && isa<InlineAsm>(CI->getCalledValue())) {
        if (TLI->ExpandInlineAsm(CI)) {
          BBI = BB.begin();
          // Avoid processing instructions out of order, which could cause
          // reuse before a value is defined.
          SunkAddrs.clear();
        } else
          // Sink address computing for memory operands into the block.
          MadeChange |= OptimizeInlineAsmInst(I, &(*CI), SunkAddrs);
      } else {
        // Other CallInst optimizations that don't need to muck with the
        // enclosing iterator here.
        MadeChange |= OptimizeCallInst(CI);
      }
    }
  }

  return MadeChange;
}