LLVM API Documentation
00001 //===- Trace.cpp - Implementation of Trace class --------------------------===// 00002 // 00003 // The LLVM Compiler Infrastructure 00004 // 00005 // This file was developed by the LLVM research group and is distributed under 00006 // the University of Illinois Open Source License. See LICENSE.TXT for details. 00007 // 00008 //===----------------------------------------------------------------------===// 00009 // 00010 // This class represents a single trace of LLVM basic blocks. A trace is a 00011 // single entry, multiple exit, region of code that is often hot. Trace-based 00012 // optimizations treat traces almost like they are a large, strange, basic 00013 // block: because the trace path is assumed to be hot, optimizations for the 00014 // fall-through path are made at the expense of the non-fall-through paths. 00015 // 00016 //===----------------------------------------------------------------------===// 00017 00018 #include "llvm/Analysis/Trace.h" 00019 #include "llvm/Function.h" 00020 #include "llvm/Assembly/Writer.h" 00021 #include <iostream> 00022 00023 using namespace llvm; 00024 00025 Function *Trace::getFunction() const { 00026 return getEntryBasicBlock()->getParent(); 00027 } 00028 00029 00030 Module *Trace::getModule() const { 00031 return getFunction()->getParent(); 00032 } 00033 00034 /// print - Write trace to output stream. 00035 /// 00036 void Trace::print (std::ostream &O) const { 00037 Function *F = getFunction (); 00038 O << "; Trace from function " << F->getName () << ", blocks:\n"; 00039 for (const_iterator i = begin (), e = end (); i != e; ++i) { 00040 O << "; "; 00041 WriteAsOperand (O, *i, true, true, getModule ()); 00042 O << "\n"; 00043 } 00044 O << "; Trace parent function: \n" << *F; 00045 } 00046 00047 /// dump - Debugger convenience method; writes trace to standard error 00048 /// output stream. 00049 /// 00050 void Trace::dump () const { 00051 print (std::cerr); 00052 }