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/IR/Function.h" 20 #include "llvm/Support/Debug.h" 21 #include "llvm/Support/raw_ostream.h" 22 using namespace llvm; 23 getFunction() const24Function *Trace::getFunction() const { 25 return getEntryBasicBlock()->getParent(); 26 } 27 getModule() const28Module *Trace::getModule() const { 29 return getFunction()->getParent(); 30 } 31 32 /// print - Write trace to output stream. 33 /// print(raw_ostream & O) const34void Trace::print(raw_ostream &O) const { 35 Function *F = getFunction(); 36 O << "; Trace from function " << F->getName() << ", blocks:\n"; 37 for (const_iterator i = begin(), e = end(); i != e; ++i) { 38 O << "; "; 39 (*i)->printAsOperand(O, true, getModule()); 40 O << "\n"; 41 } 42 O << "; Trace parent function: \n" << *F; 43 } 44 45 #if !defined(NDEBUG) || defined(LLVM_ENABLE_DUMP) 46 /// dump - Debugger convenience method; writes trace to standard error 47 /// output stream. 48 /// dump() const49void Trace::dump() const { 50 print(dbgs()); 51 } 52 #endif 53