1 //===- Trace.cpp - Implementation of Trace class --------------------------===// 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 class represents a single trace of LLVM basic blocks. A trace is a 11 // single entry, multiple exit, region of code that is often hot. Trace-based 12 // optimizations treat traces almost like they are a large, strange, basic 13 // block: because the trace path is assumed to be hot, optimizations for the 14 // fall-through path are made at the expense of the non-fall-through paths. 15 // 16 //===----------------------------------------------------------------------===// 17 18 #include "llvm/Analysis/Trace.h" 19 #include "llvm/Function.h" 20 #include "llvm/Assembly/Writer.h" 21 #include "llvm/Support/Debug.h" 22 #include "llvm/Support/raw_ostream.h" 23 using namespace llvm; 24 25 Function *Trace::getFunction() const { 26 return getEntryBasicBlock()->getParent(); 27 } 28 29 Module *Trace::getModule() const { 30 return getFunction()->getParent(); 31 } 32 33 /// print - Write trace to output stream. 34 /// 35 void Trace::print(raw_ostream &O) const { 36 Function *F = getFunction(); 37 O << "; Trace from function " << F->getNameStr() << ", blocks:\n"; 38 for (const_iterator i = begin(), e = end(); i != e; ++i) { 39 O << "; "; 40 WriteAsOperand(O, *i, true, getModule()); 41 O << "\n"; 42 } 43 O << "; Trace parent function: \n" << *F; 44 } 45 46 /// dump - Debugger convenience method; writes trace to standard error 47 /// output stream. 48 /// 49 void Trace::dump() const { 50 print(dbgs()); 51 } 52
