1 //===- Interval.cpp - Interval class code ---------------------------------===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 // 10 // This file contains the definition of the Interval class, which represents a 11 // partition of a control flow graph of some kind. 12 // 13 //===----------------------------------------------------------------------===// 14 15 #include "llvm/Analysis/Interval.h" 16 #include "llvm/IR/BasicBlock.h" 17 #include "llvm/IR/CFG.h" 18 #include "llvm/Support/raw_ostream.h" 19 20 using namespace llvm; 21 22 //===----------------------------------------------------------------------===// 23 // Interval Implementation 24 //===----------------------------------------------------------------------===// 25 26 // isLoop - Find out if there is a back edge in this interval... 27 bool Interval::isLoop() const { 28 // There is a loop in this interval iff one of the predecessors of the header 29 // node lives in the interval. 30 for (::pred_iterator I = ::pred_begin(HeaderNode), E = ::pred_end(HeaderNode); 31 I != E; ++I) 32 if (contains(*I)) 33 return true; 34 return false; 35 } 36 37 void Interval::print(raw_ostream &OS) const { 38 OS << "-------------------------------------------------------------\n" 39 << "Interval Contents:\n"; 40 41 // Print out all of the basic blocks in the interval... 42 for (const BasicBlock *Node : Nodes) 43 OS << *Node << "\n"; 44 45 OS << "Interval Predecessors:\n"; 46 for (const BasicBlock *Predecessor : Predecessors) 47 OS << *Predecessor << "\n"; 48 49 OS << "Interval Successors:\n"; 50 for (const BasicBlock *Successor : Successors) 51 OS << *Successor << "\n"; 52 } 53
