lib/Analysis/LoopDepth.cpp

   1 //===- LoopDepth.cpp - Loop Depth Calculation --------------------*- C++ -*--=//
   2 //
   3 // This file provides a simple class to calculate the loop depth of a
   4 // BasicBlock.
   5 //
   6 //===----------------------------------------------------------------------===//
   7
   8 #include "llvm/Analysis/LoopDepth.h"
   9 #include "llvm/Analysis/LoopInfo.h"
  10 #include "llvm/Method.h"
  11 #include <algorithm>
  12
  13 AnalysisID cfg::LoopDepthCalculator::ID(AnalysisID::create<cfg::LoopDepthCalculator>());
  14
  15 bool cfg::LoopDepthCalculator::runOnMethod(Method *M) {
  16   calculate(M, getAnalysis<LoopInfo>());
  17   return false;
  18 }
  19
  20 void cfg::LoopDepthCalculator::calculate(Method *M, LoopInfo &Loops) {
  21   for (Method::iterator I = M->begin(), E = M->end(); I != E; ++I)
  22     LoopDepth[*I] = Loops.getLoopDepth(*I);
  23 }
  24
  25 // getAnalysisUsageInfo - Provide loop depth, require loop info
  26 //
  27 void cfg::LoopDepthCalculator::getAnalysisUsageInfo(Pass::AnalysisSet &Requires,
  28                                                   Pass::AnalysisSet &Destroyed,
  29                                                   Pass::AnalysisSet &Provided) {
  30   Provided.push_back(ID);
  31   Requires.push_back(LoopInfo::ID);
  32 }
  33